Re: [Lift] Re: serving images from a directory
Thanks Marius.
On Sat, Feb 27, 2010 at 4:07 AM, Marius marius.dan...@gmail.com wrote:
If you want Lift to serve images you should put them in /resources/
toserve folder and reference them as /classpath/{image file}
If you want to put images say in /img folder at the same level with /
WEB-INF for example, you just reference tham /img/{image file} ...
these will not be served by Lift but by web container.
There is no need for SiteMap when serving other resources.
On Feb 27, 10:53 am, jack jack.wid...@gmail.com wrote:
I would like to access an image on the client via a URL. How do I
generate that URL. Currently, I'm getting the error
The requested page was not defined in your SiteMap, so access was
blocked.
I understand what this error means for html pages. How does it work
for images?
Thanks.
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Re: [Lift] Re: simple database question
excellent. Thanks. Just what I needed.
On Thu, Nov 26, 2009 at 2:34 PM, harryh har...@gmail.com wrote:
Here is what you need for a minimal Person table that contains two
columns: an id for the primary key, and name which is a string:
package com.jacksdomain.model
import net.liftweb.mapper._
class Person extends LongKeyedMapper[Person] with IdPK {
def getSingleton = Person
object name extends MappedString(this, 100)
}
object Person extends Person with LongKeyedMetaMapper[Person] {
override def dbTableName = person
}
You can then do things like this:
val person = Person.find(1) // retrieve the person with id = 1 from
the database
val person = Person.find(By(Person.name, Jack)) // retrieve the
person with name = Jack from the database
val people = Person.findAll() // retrieve all people form the database
val people = Person.findAll(By_(Person.id, 10)) // retrieve all the
people with id 10
etc.
-harryh
On Nov 26, 1:39 pm, jack jack.wid...@gmail.com wrote:
wow. thats impressive. But for this, what does the Person class have
to look like? Suppose I have the table but I don't have the Person
class written. What does it need to look like?
On Nov 26, 1:32 pm, harryh har...@gmail.com wrote:
val people = Person.findAll()
On Nov 26, 1:22 pm, jack jack.wid...@gmail.com wrote:
I have my database configured properly in Boot.scala and in my
pom.xml. Suppose I have a table name person with a field called name.
What is the simple code to return all rows of this table using
Mapper.
I want to understand the essence of how lift ties tables to objects
with a simple example.
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Re: [Lift] InputStream to String
I kind of like it. Says exactly what it does :)
On Sat, Nov 21, 2009 at 9:56 AM, David Pollak feeder.of.the.be...@gmail.com
wrote:
Helpers.readWholeThing(reader): String
Yes... this method name is ripe for bettering.
On Sat, Nov 21, 2009 at 6:47 AM, jack jack.wid...@gmail.com wrote:
I have seen this problem around and it seems basic but I haven't found
a solution. I need to turn an InputStream into a String. There seems
to be a bug in the Source class that fails for large files so I don't
want to use that (though it is an elegant approach).
The following doesn't work because reader.readLine returns Unit and
not null, as in Java.
val reader = new BufferedReader(new InputStreamReader(is))
var responseBody =
var line = reader.readLine()
while(line != null){
responseBody += line
line = reader.readLine()
}
return responseBody
What to do?
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Re: [Lift] Re: InputStream to String
How about
pleaseGoOutAndConvertThisInputStreamToAStringAndReturnIt
And then after returns the String you can call a function called
thankYou
On Sat, Nov 21, 2009 at 10:40 AM, Timothy Perrett
timo...@getintheloop.euwrote:
HAHAHA. That is an awesome method name if ever i did see one. Little
confused why readWholeInputStream was somehow not the obvious
choice ;-)
Cheers, Tim
On Nov 21, 4:37 pm, Jack Widman jack.wid...@gmail.com wrote:
I kind of like it. Says exactly what it does :)
On Sat, Nov 21, 2009 at 9:56 AM, David Pollak
feeder.of.the.be...@gmail.com
wrote:
Helpers.readWholeThing(reader): String
Yes... this method name is ripe for bettering.
On Sat, Nov 21, 2009 at 6:47 AM, jack jack.wid...@gmail.com wrote:
I have seen this problem around and it seems basic but I haven't found
a solution. I need to turn an InputStream into a String. There seems
to be a bug in the Source class that fails for large files so I don't
want to use that (though it is an elegant approach).
The following doesn't work because reader.readLine returns Unit and
not null, as in Java.
val reader = new BufferedReader(new InputStreamReader(is))
var responseBody =
var line = reader.readLine()
while(line != null){
responseBody += line
line = reader.readLine()
}
return responseBody
What to do?
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Re: [Lift] Re: Menu generated from database?
This is one of thing that is so amazing about the lift community David. You
apologize for not getting to something today. [?]
On Thu, Nov 19, 2009 at 12:56 PM, David Pollak
feeder.of.the.be...@gmail.com wrote:
Philip list,
I've had it on my to-do list to write up an example... and haven't...
but...
In your Loc, you can override def supplimentalKidMenuItems and dynamically
generate kid menu items.
I'll try to get to an example but not today... sorry :-(
Thanks,
David
On Thu, Nov 19, 2009 at 12:35 AM, philip philip14...@gmail.com wrote:
Hi David,
Since I am programming a CMS for my client, I need my lift menu to
come from the database.
LiftRules.setSiteMap(SiteMap(MenuInfo.menu :_*))
def menu: List[Menu] =
{
Log.info(Menu called)
...
It seems my menu function only gets called once, on subsquent calls I
do not get any log message.
Maybe I have to subclass SiteMap?
Can you point me in the right direction?
Thanks, Philip
On 10月21日, 下午11時20分, David Pollak feeder.of.the.be...@gmail.com
wrote:
I owe the list example code to do this... maybe tomorrow.
On Wed, Oct 21, 2009 at 6:26 AM, philip philip14...@gmail.com wrote:
Hi,
How can I get a Liftweb menu to be generated from database content?
Alternatively, can the menu come from a XML datasource? could I load/
serialize from that?
Could it change dynamically at any time?
Thanks, Philip
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330.gif
Re: [Lift] Re: Call it Lift 2.0
good feedback from you), the Scala 2.8 port, and the flood of newbies on the list. So, yeah, I don't spend 2+ hours a day debating... I make shorter fuse decisions. But, the it's DPP's ball and he'll do with it what he wants kind of feedback bugs me at a very, very core level. - Jonathan Fergusonj...@spiralarm.com wrote: I was thinking about this earlier, if there is to be a 2.0 I would hope there was a chance to remove deprecated code. Which particular deprecated code are you thinking. Also consider making breaking changes @dpp hasn't been in favour of making to date. Which changes are you thinking about? Not to annoy him. As 1.X to 2.X is a big enough change that people who don't want to move can stay with a stable 1.X and those of us who are running HEAD/TRUNK whatever these new fangled git kids call it nowadays can keep racing along. I'm not sure we have the resources to support a 1.X and a 2.X and a 2.7.x and a 2.8.x branch. If there are any folks who want to step up and maintain a branch (or if there's money to hire someone), it's something worth a discussion, but I don't think there's anyone I know of who could maintain a 1.X branch if we're going to get radical with a 2.X. I think it's one branch. Jono. 2009/11/17 Heiko Seeberger heiko.seeber...@googlemail.com 2009/11/17 David Pollak feeder.of.the.be...@gmail.com The current Lift is not a major change to Lift 1.0, it's a minor progression and a lot of tuning of the developer experience. There are breaking changes to the API which in the version policy suggested by me (the OSGi way) means increasing the major version number. OK, of course we need not stick to this particular version policy, but it would be beneficial to have one. What about: Increasing the minor version number (e.g. 1.0 - 1.1) means breaking changes to the API. Increasing the micro version number (e.g. 1.1.0 - 1.1.1) means *no* breaking changes to the API. Heiko My job: weiglewilczek.com My blog: heikoseeberger.name Follow me: twitter.com/hseeberger OSGi on Scala: scalamodules.org Lift, the simply functional web framework: liftweb.net -- You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to lift...@googlegroups.com. To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.comliftweb%2bunsubscr...@googlegroups.com liftweb%2bunsubscr...@googlegroups.comliftweb%252bunsubscr...@googlegroups.com liftweb%2bunsubscr...@googlegroups.comliftweb%252bunsubscr...@googlegroups.com liftweb%252bunsubscr...@googlegroups.comliftweb%25252bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/liftweb?hl=. -- You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to lift...@googlegroups.com. To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.comliftweb%2bunsubscr...@googlegroups.com liftweb%2bunsubscr...@googlegroups.comliftweb%252bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/liftweb?hl=. -- You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to lift...@googlegroups.com. To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.comliftweb%2bunsubscr...@googlegroups.com liftweb%2bunsubscr...@googlegroups.comliftweb%252bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/liftweb?hl=. -- Lift, the simply functional web framework http://liftweb.net Beginning Scala http://www.apress.com/book/view/1430219890 Follow me: http://twitter.com/dpp Surf the harmonics -- You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to lift...@googlegroups.com. To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.comliftweb%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/liftweb?hl=. -- You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to lift...@googlegroups.com. To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.comliftweb%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/liftweb?hl=. -- Jack Widman co-founder / cto, Authoritude, Inc. 203-641-9355 -- You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to lift...@googlegroups.com
Re: [Lift] Re: How do I properly read a value from a cookie?
A refuting piece of evidence from the guy who created nulls. How cool is
that?! :)
On Tue, Nov 17, 2009 at 1:20 AM, David Pollak feeder.of.the.be...@gmail.com
wrote:
On Mon, Nov 16, 2009 at 9:01 PM, DMB combust...@gmail.com wrote:
that it's not null--which is a source of many bugs
After a bold statement like this, one can't help but wonder how
programmers manage to ship software in all the other languages. :-)
Come to think of it, after working on a couple of pretty large ASP.NET
projects (~50 devs), I haven't once seen a bug which was caused by the
semantics of retrieving the cookie or URL parameter values. I'm not
saying the Box thing doesn't have its uses, I'm just saying that in
this particular case it's a pain in the ass and overkill.
Before judging, spend a month or two writing idomatic Scala code rather
than fighting with it.
In your example, I reduced the lines of code, made your code more logical
and reduced the McCabe complexity (see
http://en.wikipedia.org/wiki/Cyclomatic_complexity). The higher the
McCabe complexity, the more defects there are in software.
So, even in a trivial 20 line program, using the Scala idioms shortens code
and generally makes code easier to read and easier to maintain.
And we're not the only ones who think null is a problem... the guy that
invented null thinks it's a huge problem:
http://qconlondon.com/london-2009/presentation/Null+References:+The+Billion+Dollar+Mistake
On Nov 16, 2:40 pm, Naftoli Gugenheim naftoli...@gmail.com wrote:
As others may have said, the difference between a Box and a value that
may be null is that both may or may not contain what you want it to have;
but in one case the compiler lets you assume that it does--that it's not
null--which is a source of many bugs.
Programming presents a tension between type safety and conciseness, and
Scala does an amazing job of being extremely type safe and extremely
concise. But type safety comes first.
-
DMBcombust...@gmail.com wrote:
I guess that could work, but why go to such lengths where there are
much more straightforward solutions available? What do for
comprehensions buy you in this case? I mean, 99% of the time, when I
want to check for a cookie, I don't need the cookie itself or any of
its properties. I need its value, or null if there's no cookie. Why
not do something a-la RoR:
S.cookieValue(cookieName)
or a-la ASP.NET:
val c = S.cookie(cookieName)
if(c != null) {
val v = c.value
}
Or, indeed, both?
On Nov 16, 1:22 am, Sergey Andreev andser...@gmail.com wrote:
Hi,
For-comprehensions could help you out:
for{
cookie - S.findCookie(cookieName)
value - cookie} doSomethingWithValue
Regards
On Mon, Nov 16, 2009 at 12:07 PM, DMB combust...@gmail.com wrote:
When I call findCookie it returns a Box. Then, the value on the
cookie
itself is also a box. Hence a ruby one-liner turns into something
like:
val cookie = S.findCookie(cookieName)
if(cookie.isDefined) {
val cookieVal = cookie.open_!.value.openOr(null)
// Do something with the cookie value
}
This is very ugly, so I'm guessing I'm doing something wrong, but
try
as I might, I could not find any examples that would look even
vaguely
right to me.
Why can't findCookie return a simple, unboxed HTTPCookie object or
null if cookie is not found?
Why does the value inside a cookie need to also be Box'ed?
For the sake of comparison, here's how you do the same thing in RoR:
v = cookies[cookieName]
// Do something with the cookie
or ASP.NET:
var c = Request.Cookies[CookieName]
if(c != null) {
var v = c.Value
// Do something with the cookie
}
I fail to see why Lift should be more complicated.
This is with Lift 1.1 M7
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[Lift] Re: CometListener
sure. Thanks Ross. I will send it tonight. Also what is the difference between the CometListener and the CometListenee? On Fri, Nov 13, 2009 at 11:14 AM, Ross Mellgren dri...@gmail.com wrote: Could you send over your pom.xml if you're using Maven? It sounds like maybe your build path is not correct. -Ross On Nov 13, 2009, at 12:09 AM, Jack Widman wrote: David, I'm using lift 1.1 and scala 2.5 now and the compiler says it cant find CometListener when I import net.liftweb.http._ Jack On Fri, Nov 13, 2009 at 12:01 AM, David Pollak feeder.of.the.be...@gmail.com wrote: On Thu, Nov 12, 2009 at 8:54 PM, Jack Widman jack.wid...@gmail.comwrote: C:\work\widman\src\main\scala\com\widman\comet\PackComet.scala:20: error: type CometListener is not a member of package net.liftweb.http I got this compile error. I must be missing something obvious. It's part of Lift 1.1, not Lift 1.0 On Thu, Nov 12, 2009 at 11:42 PM, Ross Mellgren dri...@gmail.comwrote: It is in net.liftweb.http. http://www.scala-tools.org/mvnsites-snapshots/liftweb/lift-webkit/scaladocs/net/liftweb/http/CometListener.html By the way, the link you gave only indicates it's in either net.liftweb.http, net.liftweb.util, net.liftweb or model (or a couple other packages, since scala implicitly imports superpackages). -Ross On Nov 12, 2009, at 11:38 PM, jack wrote: I also tried net.liftweb.http On Nov 12, 11:35 pm, jack jack.wid...@gmail.com wrote: I am trying to use CometListener. According tohttp://bit.ly/1Wnxt4, it is in the package net.liftweb._ but compiler says it can't be found. Is this the wrong package? -- Jack Widman co-founder / cto, Authoritude, Inc. 203-641-9355 -- Lift, the simply functional web framework http://liftweb.net Beginning Scala http://www.apress.com/book/view/1430219890 Follow me: http://twitter.com/dpp Surf the harmonics -- Jack Widman co-founder / cto, Authoritude, Inc. 203-641-9355 -- Jack Widman co-founder / cto, Authoritude, Inc. 203-641-9355 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: CometListener
Here is my pom.xml
On Fri, Nov 13, 2009 at 12:09 PM, Jack Widman jack.wid...@gmail.com wrote:
sure. Thanks Ross. I will send it tonight. Also what is the difference
between the CometListener and the CometListenee?
On Fri, Nov 13, 2009 at 11:14 AM, Ross Mellgren dri...@gmail.com wrote:
Could you send over your pom.xml if you're using Maven? It sounds like
maybe your build path is not correct.
-Ross
On Nov 13, 2009, at 12:09 AM, Jack Widman wrote:
David,
I'm using lift 1.1 and scala 2.5 now and the compiler says it cant find
CometListener when I import net.liftweb.http._
Jack
On Fri, Nov 13, 2009 at 12:01 AM, David Pollak
feeder.of.the.be...@gmail.com wrote:
On Thu, Nov 12, 2009 at 8:54 PM, Jack Widman jack.wid...@gmail.comwrote:
C:\work\widman\src\main\scala\com\widman\comet\PackComet.scala:20:
error: type CometListener is not a member of package net.liftweb.http
I got this compile error.
I must be missing something obvious.
It's part of Lift 1.1, not Lift 1.0
On Thu, Nov 12, 2009 at 11:42 PM, Ross Mellgren dri...@gmail.comwrote:
It is in net.liftweb.http.
http://www.scala-tools.org/mvnsites-snapshots/liftweb/lift-webkit/scaladocs/net/liftweb/http/CometListener.html
By the way, the link you gave only indicates it's in either
net.liftweb.http, net.liftweb.util, net.liftweb or model (or a couple
other packages, since scala implicitly imports superpackages).
-Ross
On Nov 12, 2009, at 11:38 PM, jack wrote:
I also tried net.liftweb.http
On Nov 12, 11:35 pm, jack jack.wid...@gmail.com wrote:
I am trying to use CometListener. According tohttp://bit.ly/1Wnxt4,
it is in the package net.liftweb._ but compiler says it can't be
found. Is this the wrong package?
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project xmlns=http://maven.apache.org/POM/4.0.0; xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance; xsi:schemaLocation=http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd;
modelVersion4.0.0/modelVersion
groupIdcom.widman/groupId
artifactIdwidman/artifactId
version1.1-M6/version
packagingwar/packaging
namewidman/name
inceptionYear2007/inceptionYear
properties
scala.version2.7.5/scala.version
/properties
repositories
repository
idscala-tools.org/id
nameScala-Tools Maven2 Repository/name
urlhttp://scala-tools.org/repo-releases/url
/repository
/repositories
pluginRepositories
pluginRepository
idscala-tools.org/id
nameScala-Tools Maven2 Repository/name
urlhttp://scala-tools.org/repo-releases/url
/pluginRepository
/pluginRepositories
dependencies
dependency
groupIdnet.liftweb/groupId
artifactIdlift-textile/artifactId
version1.1-M6/version
/dependency
dependency
groupIdorg.scala-lang/groupId
artifactIdscala-library/artifactId
version${scala.version}/version
/dependency
dependency
groupIdnet.liftweb/groupId
artifactIdlift-util/artifactId
version1.0/version
/dependency
dependency
groupIdnet.liftweb/groupId
artifactIdlift-webkit/artifactId
version1.0/version
/dependency
dependency
groupIdnet.liftweb/groupId
artifactIdlift-mapper/artifactId
version1.0/version
/dependency
dependency
groupIdjavax.servlet/groupId
artifactIdservlet-api/artifactId
version2.5/version
scopeprovided/scope
/dependency
dependency
groupIdjunit/groupId
artifactIdjunit/artifactId
version4.5/version
scopetest/scope
/dependency
dependency
groupIdorg.mortbay.jetty/groupId
artifactIdjetty/artifactId
version[6.1.6,)/version
scopetest/scope
/dependency
!-- for LiftConsole --
dependency
groupIdorg.scala-lang/groupId
artifactIdscala-compiler/artifactId
version${scala.version}/version
scopetest/scope
/dependency
!-- dependency
groupIdorg.apache.httpcomponents/groupId
artifactIdhttpcore/artifactId
version4.0.1/version
scopecompile
[Lift] Re: CometListener
Thanks Ross.
On Fri, Nov 13, 2009 at 11:55 PM, Ross Mellgren dri...@gmail.com wrote:
Your pom specifies lift 1.0, not 1.1 for the majority of lift modules. You
are using 1.1-M6 for lift-textile. In addition, you don't have the snapshots
repository configured.
To fix this, first add the snapshot repository to repositories:
repository
idscala-tools.org.snapshots/id
nameScala-Tools Maven2 Repository for Snapshots/name
urlhttp://scala-tools.org/repo-snapshots/url
snapshots/
/repository
Then switch *all* your lift-* dependencies to 1.1-SNAPSHOT and your scala
version to 2.7.7. I use a property for the lift version to use, myself, like
this:
properties
scala.version2.7.7/scala.version
lift.version1.1-SNAPSHOT/lift.version
/properties
...
dependency
groupIdnet.liftweb/gropuId
artifactIdlift-util/artifactId
version${lift.version}/version}
/dependency
(and so on, for each lift-* dependency)
I'm not sure what would happen exactly if you have mixed versions of the
lift modules, but It Can't Be Good.
Hope that helps,
-Ross
On Nov 13, 2009, at 10:17 PM, Jack Widman wrote:
Here is my pom.xml
On Fri, Nov 13, 2009 at 12:09 PM, Jack Widman jack.wid...@gmail.comwrote:
sure. Thanks Ross. I will send it tonight. Also what is the difference
between the CometListener and the CometListenee?
On Fri, Nov 13, 2009 at 11:14 AM, Ross Mellgren dri...@gmail.com wrote:
Could you send over your pom.xml if you're using Maven? It sounds like
maybe your build path is not correct.
-Ross
On Nov 13, 2009, at 12:09 AM, Jack Widman wrote:
David,
I'm using lift 1.1 and scala 2.5 now and the compiler says it cant find
CometListener when I import net.liftweb.http._
Jack
On Fri, Nov 13, 2009 at 12:01 AM, David Pollak
feeder.of.the.be...@gmail.com wrote:
On Thu, Nov 12, 2009 at 8:54 PM, Jack Widman jack.wid...@gmail.comwrote:
C:\work\widman\src\main\scala\com\widman\comet\PackComet.scala:20:
error: type CometListener is not a member of package net.liftweb.http
I got this compile error.
I must be missing something obvious.
It's part of Lift 1.1, not Lift 1.0
On Thu, Nov 12, 2009 at 11:42 PM, Ross Mellgren dri...@gmail.comwrote:
It is in net.liftweb.http.
http://www.scala-tools.org/mvnsites-snapshots/liftweb/lift-webkit/scaladocs/net/liftweb/http/CometListener.html
By the way, the link you gave only indicates it's in either
net.liftweb.http, net.liftweb.util, net.liftweb or model (or a couple
other packages, since scala implicitly imports superpackages).
-Ross
On Nov 12, 2009, at 11:38 PM, jack wrote:
I also tried net.liftweb.http
On Nov 12, 11:35 pm, jack jack.wid...@gmail.com wrote:
I am trying to use CometListener. According tohttp://bit.ly/1Wnxt4
,
it is in the package net.liftweb._ but compiler says it can't be
found. Is this the wrong package?
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
pom.xml
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--~--~-~--~~~---~--~~
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[Lift] Re: CometActor and render
I did and its actually in the code I attached. In one place I use Dispatch and in another place I use httpclient directly. I intend to use Dispatch for everything. On Thu, Nov 12, 2009 at 4:05 PM, Randinn rand...@gmail.com wrote: I'm not trying to change the subject but I was wondering if you looked at Databinder Dispatch http://databinder.net/dispatch/About for your url calls? On Nov 12, 3:26 pm, Jack Widman jack.wid...@gmail.com wrote: David, I have attached my code. It runs but does not behave as I intended it to. The code does a web search on the term scala and displays a list of URLs of the results. Next to each URL it says Page Length : -1. A process is running in the background which takes each URL, goes out and gets the page and takes the length of the page. The length of that page is then supposed to immediately appear on the page next to that URL. I put the lengths on a queue, as they come in, and I have the Comet page poll the queue and display the results. It would probably be better to have the results send a message to the Comet class so the page is only re-rendered when there is a change but for now I am polling. I can see the lengths coming in and being put on the queue, but the Comet page is not getting them till they are all retrieved. (This takes way too long and nothing changes on the screen till its too late). I need them to appear as they come in. Occasionally I can see a length being retrieved and the Comet page finds it but even then it is not displayed until all the lengths are in. I know this is not very clear but I think it will be clear from the code. I also know there are a lot of places in the code which can be improved and I welcome all of your input but what I would love is to have these numbers appear on the page as they they are retrieved. I have been stumped by this for a while and I suspect that somebody who knows Lift well might see the problem right away. The class that retrieves the page lengths is called Calculator and the queue is called SourceQueue. The classes are pretty small so hopefully it will be clear what is going on. I want you to know I think it is incredible how responsive you and the group are and I look forward to using Lift in the future. Thanks so much. Jack On Tue, Nov 10, 2009 at 1:27 AM, David Pollak feeder.of.the.be...@gmail.com wrote: On Mon, Nov 9, 2009 at 10:10 PM, Jack Widman jack.wid...@gmail.com wrote: The only difference between your working code and mine is that mine has a process in the background that is always running and puts Foo objects on a queue whenever they are ready. Where can I start this long running process so that it doesn't interfere with the lowPriority method that takes things off the queue and rerenders the page. I tried starting the process in its own Actor that I start in localSetup but it seems somehow to be blocking the lowPriority method from doing its thing. I have no idea what this means... sorry. Please post actual runnable code and we can help you debug. On Sun, Nov 8, 2009 at 11:35 PM, David Pollak feeder.of.the.be...@gmail.com wrote: Jack, I reproduced your code and it seems to work fine. I've enclosed a working copy. Some comments about your code: - The foos variable and the foo variable may be getting confused in the code... the render method may be rendering the same thing based on the unchanging foos variable. - Doing null testing is a sign that you have logic errors in your code. I strongly recommend using either Box or Option for everything that can logically not contain a value/reference. If you're bridging out to Java code and are expecting null from the Java code, write a small bridge that will wrapper the Java return values in Box/Option. - You have a case class (Tick) that contains no parameters. Please use a case object instead. - Your Tick look is a spin loop. You fire a Tick message as part of processing the Tick message. I would suggest that if you're polling, that you have a reasonable poll interval, otherwise you'll starve your CPU. Further, having reRender on each loop through means that you're forcing a lot of bytes over the wire rather than only doing a reRender on changed values. Thanks, David On Sun, Nov 8, 2009 at 3:47 PM, Jack Widman jack.wid...@gmail.com wrote: Sorry. Here it is: As I said, I know that when render is called, foo.getValue has the right value. But it does not show on the screen, unless I refresh the browser. package com.foo.comet import net.liftweb._ import http._ import js._ import JsCmds._ import net.liftweb.util._ import net.liftweb.http._ import _root_.scala.xml._ import scala.actors._ import com.authoritude.snippet
[Lift] Re: CometActor and render
Will do. One more small question How do I send a message to the Comet Actor from another class? Can the CometActor be an object instead of a class? In the code X ! messageToCometActor, what is X? I don't have a variable that holds the instance of the CometActor. On Thu, Nov 12, 2009 at 5:12 PM, David Pollak feeder.of.the.be...@gmail.com wrote: Jack, The issues you're seeing are not Lift related. You are not using Actors correctly. Please see Philipp Haller's preso on Actors: http://lamp.epfl.ch/~phaller/doc/ScalaActors.pdfhttp://lamp.epfl.ch/%7Ephaller/doc/ScalaActors.pdf Please also look at the Actor chapters in Beginning Scala or Programming in Scala. Thanks, David On Wed, Nov 11, 2009 at 8:26 PM, Jack Widman jack.wid...@gmail.comwrote: David, I have attached my code. It runs but does not behave as I intended it to. The code does a web search on the term scala and displays a list of URLs of the results. Next to each URL it says Page Length : -1. A process is running in the background which takes each URL, goes out and gets the page and takes the length of the page. The length of that page is then supposed to immediately appear on the page next to that URL. I put the lengths on a queue, as they come in, and I have the Comet page poll the queue and display the results. It would probably be better to have the results send a message to the Comet class so the page is only re-rendered when there is a change but for now I am polling. I can see the lengths coming in and being put on the queue, but the Comet page is not getting them till they are all retrieved. (This takes way too long and nothing changes on the screen till its too late). I need them to appear as they come in. Occasionally I can see a length being retrieved and the Comet page finds it but even then it is not displayed until all the lengths are in. I know this is not very clear but I think it will be clear from the code. I also know there are a lot of places in the code which can be improved and I welcome all of your input but what I would love is to have these numbers appear on the page as they they are retrieved. I have been stumped by this for a while and I suspect that somebody who knows Lift well might see the problem right away. The class that retrieves the page lengths is called Calculator and the queue is called SourceQueue. The classes are pretty small so hopefully it will be clear what is going on. I want you to know I think it is incredible how responsive you and the group are and I look forward to using Lift in the future. Thanks so much. Jack On Tue, Nov 10, 2009 at 1:27 AM, David Pollak feeder.of.the.be...@gmail.com wrote: On Mon, Nov 9, 2009 at 10:10 PM, Jack Widman jack.wid...@gmail.comwrote: The only difference between your working code and mine is that mine has a process in the background that is always running and puts Foo objects on a queue whenever they are ready. Where can I start this long running process so that it doesn't interfere with the lowPriority method that takes things off the queue and rerenders the page. I tried starting the process in its own Actor that I start in localSetup but it seems somehow to be blocking the lowPriority method from doing its thing. I have no idea what this means... sorry. Please post actual runnable code and we can help you debug. On Sun, Nov 8, 2009 at 11:35 PM, David Pollak feeder.of.the.be...@gmail.com wrote: Jack, I reproduced your code and it seems to work fine. I've enclosed a working copy. Some comments about your code: - The foos variable and the foo variable may be getting confused in the code... the render method may be rendering the same thing based on the unchanging foos variable. - Doing null testing is a sign that you have logic errors in your code. I strongly recommend using either Box or Option for everything that can logically not contain a value/reference. If you're bridging out to Java code and are expecting null from the Java code, write a small bridge that will wrapper the Java return values in Box/Option. - You have a case class (Tick) that contains no parameters. Please use a case object instead. - Your Tick look is a spin loop. You fire a Tick message as part of processing the Tick message. I would suggest that if you're polling, that you have a reasonable poll interval, otherwise you'll starve your CPU. Further, having reRender on each loop through means that you're forcing a lot of bytes over the wire rather than only doing a reRender on changed values. Thanks, David On Sun, Nov 8, 2009 at 3:47 PM, Jack Widman jack.wid...@gmail.comwrote: Sorry. Here it is: As I said, I know that when render is called, foo.getValue has the right value. But it does not show on the screen, unless I refresh the browser. package com.foo.comet import net.liftweb._ import http
[Lift] Re: CometActor and render
Thanks. On Thu, Nov 12, 2009 at 5:32 PM, David Pollak feeder.of.the.be...@gmail.com wrote: On Thu, Nov 12, 2009 at 2:16 PM, Jack Widman jack.wid...@gmail.comwrote: Will do. One more small question How do I send a message to the Comet Actor from another class? Can the CometActor be an object instead of a class? In the code Lift instantiates a new CometActor each time it needs one. If you have a singleton CometActor, you'd be sharing state across all sessions and that would be impossible to manage. X ! messageToCometActor, what is X? I don't have a variable that holds the instance of the CometActor. If the CometActor is a listener to another service, you can register the instance of the CometActor as a listener during localSetup and unregister during localShutdown. See that Chat example in lift-examples/example On Thu, Nov 12, 2009 at 5:12 PM, David Pollak feeder.of.the.be...@gmail.com wrote: Jack, The issues you're seeing are not Lift related. You are not using Actors correctly. Please see Philipp Haller's preso on Actors: http://lamp.epfl.ch/~phaller/doc/ScalaActors.pdfhttp://lamp.epfl.ch/%7Ephaller/doc/ScalaActors.pdf Please also look at the Actor chapters in Beginning Scala or Programming in Scala. Thanks, David On Wed, Nov 11, 2009 at 8:26 PM, Jack Widman jack.wid...@gmail.comwrote: David, I have attached my code. It runs but does not behave as I intended it to. The code does a web search on the term scala and displays a list of URLs of the results. Next to each URL it says Page Length : -1. A process is running in the background which takes each URL, goes out and gets the page and takes the length of the page. The length of that page is then supposed to immediately appear on the page next to that URL. I put the lengths on a queue, as they come in, and I have the Comet page poll the queue and display the results. It would probably be better to have the results send a message to the Comet class so the page is only re-rendered when there is a change but for now I am polling. I can see the lengths coming in and being put on the queue, but the Comet page is not getting them till they are all retrieved. (This takes way too long and nothing changes on the screen till its too late). I need them to appear as they come in. Occasionally I can see a length being retrieved and the Comet page finds it but even then it is not displayed until all the lengths are in. I know this is not very clear but I think it will be clear from the code. I also know there are a lot of places in the code which can be improved and I welcome all of your input but what I would love is to have these numbers appear on the page as they they are retrieved. I have been stumped by this for a while and I suspect that somebody who knows Lift well might see the problem right away. The class that retrieves the page lengths is called Calculator and the queue is called SourceQueue. The classes are pretty small so hopefully it will be clear what is going on. I want you to know I think it is incredible how responsive you and the group are and I look forward to using Lift in the future. Thanks so much. Jack On Tue, Nov 10, 2009 at 1:27 AM, David Pollak feeder.of.the.be...@gmail.com wrote: On Mon, Nov 9, 2009 at 10:10 PM, Jack Widman jack.wid...@gmail.comwrote: The only difference between your working code and mine is that mine has a process in the background that is always running and puts Foo objects on a queue whenever they are ready. Where can I start this long running process so that it doesn't interfere with the lowPriority method that takes things off the queue and rerenders the page. I tried starting the process in its own Actor that I start in localSetup but it seems somehow to be blocking the lowPriority method from doing its thing. I have no idea what this means... sorry. Please post actual runnable code and we can help you debug. On Sun, Nov 8, 2009 at 11:35 PM, David Pollak feeder.of.the.be...@gmail.com wrote: Jack, I reproduced your code and it seems to work fine. I've enclosed a working copy. Some comments about your code: - The foos variable and the foo variable may be getting confused in the code... the render method may be rendering the same thing based on the unchanging foos variable. - Doing null testing is a sign that you have logic errors in your code. I strongly recommend using either Box or Option for everything that can logically not contain a value/reference. If you're bridging out to Java code and are expecting null from the Java code, write a small bridge that will wrapper the Java return values in Box/Option. - You have a case class (Tick) that contains no parameters. Please use a case object instead. - Your Tick look is a spin loop. You fire a Tick message as part of processing the Tick message. I would suggest
[Lift] Re: CometActor and render
got it. I was mixing metaphors. On Thu, Nov 12, 2009 at 5:41 PM, David Pollak feeder.of.the.be...@gmail.com wrote: On Thu, Nov 12, 2009 at 2:25 PM, Jack Widman jack.wid...@gmail.comwrote: Is it that I am putting things on a Queue from within an the Calculator Actor and having the CometActor retrieve them from the Queue? Is that the problem? I will read up on actors but it would help if you could tell me (if only briefly) what you saw about my actor code that is wrong. The act method in an actor sets up the receive/react loop. It is not a background thread in and of itself. Actors are not background threads they are things that process messages sent to them with the ! method. You set up the message handling in the receive/react loop. Further, mixing method calls and Actor message handling is wicked dangerous (especially without synchronized blocks). Choose either a traditional threading model or an Actor-based model, but not both. Thanks. On Thu, Nov 12, 2009 at 5:12 PM, David Pollak feeder.of.the.be...@gmail.com wrote: Jack, The issues you're seeing are not Lift related. You are not using Actors correctly. Please see Philipp Haller's preso on Actors: http://lamp.epfl.ch/~phaller/doc/ScalaActors.pdfhttp://lamp.epfl.ch/%7Ephaller/doc/ScalaActors.pdf Please also look at the Actor chapters in Beginning Scala or Programming in Scala. Thanks, David On Wed, Nov 11, 2009 at 8:26 PM, Jack Widman jack.wid...@gmail.comwrote: David, I have attached my code. It runs but does not behave as I intended it to. The code does a web search on the term scala and displays a list of URLs of the results. Next to each URL it says Page Length : -1. A process is running in the background which takes each URL, goes out and gets the page and takes the length of the page. The length of that page is then supposed to immediately appear on the page next to that URL. I put the lengths on a queue, as they come in, and I have the Comet page poll the queue and display the results. It would probably be better to have the results send a message to the Comet class so the page is only re-rendered when there is a change but for now I am polling. I can see the lengths coming in and being put on the queue, but the Comet page is not getting them till they are all retrieved. (This takes way too long and nothing changes on the screen till its too late). I need them to appear as they come in. Occasionally I can see a length being retrieved and the Comet page finds it but even then it is not displayed until all the lengths are in. I know this is not very clear but I think it will be clear from the code. I also know there are a lot of places in the code which can be improved and I welcome all of your input but what I would love is to have these numbers appear on the page as they they are retrieved. I have been stumped by this for a while and I suspect that somebody who knows Lift well might see the problem right away. The class that retrieves the page lengths is called Calculator and the queue is called SourceQueue. The classes are pretty small so hopefully it will be clear what is going on. I want you to know I think it is incredible how responsive you and the group are and I look forward to using Lift in the future. Thanks so much. Jack On Tue, Nov 10, 2009 at 1:27 AM, David Pollak feeder.of.the.be...@gmail.com wrote: On Mon, Nov 9, 2009 at 10:10 PM, Jack Widman jack.wid...@gmail.comwrote: The only difference between your working code and mine is that mine has a process in the background that is always running and puts Foo objects on a queue whenever they are ready. Where can I start this long running process so that it doesn't interfere with the lowPriority method that takes things off the queue and rerenders the page. I tried starting the process in its own Actor that I start in localSetup but it seems somehow to be blocking the lowPriority method from doing its thing. I have no idea what this means... sorry. Please post actual runnable code and we can help you debug. On Sun, Nov 8, 2009 at 11:35 PM, David Pollak feeder.of.the.be...@gmail.com wrote: Jack, I reproduced your code and it seems to work fine. I've enclosed a working copy. Some comments about your code: - The foos variable and the foo variable may be getting confused in the code... the render method may be rendering the same thing based on the unchanging foos variable. - Doing null testing is a sign that you have logic errors in your code. I strongly recommend using either Box or Option for everything that can logically not contain a value/reference. If you're bridging out to Java code and are expecting null from the Java code, write a small bridge that will wrapper the Java return values in Box/Option. - You have a case class (Tick) that contains no parameters. Please use a case object instead
[Lift] Re: CometListener
C:\work\widman\src\main\scala\com\widman\comet\PackComet.scala:20: error: type CometListener is not a member of package net.liftweb.http I got this compile error. I must be missing something obvious. On Thu, Nov 12, 2009 at 11:42 PM, Ross Mellgren dri...@gmail.com wrote: It is in net.liftweb.http. http://www.scala-tools.org/mvnsites-snapshots/liftweb/lift-webkit/scaladocs/net/liftweb/http/CometListener.html By the way, the link you gave only indicates it's in either net.liftweb.http, net.liftweb.util, net.liftweb or model (or a couple other packages, since scala implicitly imports superpackages). -Ross On Nov 12, 2009, at 11:38 PM, jack wrote: I also tried net.liftweb.http On Nov 12, 11:35 pm, jack jack.wid...@gmail.com wrote: I am trying to use CometListener. According tohttp://bit.ly/1Wnxt4, it is in the package net.liftweb._ but compiler says it can't be found. Is this the wrong package? -- Jack Widman co-founder / cto, Authoritude, Inc. 203-641-9355 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: CometListener
David, I'm using lift 1.1 and scala 2.5 now and the compiler says it cant find CometListener when I import net.liftweb.http._ Jack On Fri, Nov 13, 2009 at 12:01 AM, David Pollak feeder.of.the.be...@gmail.com wrote: On Thu, Nov 12, 2009 at 8:54 PM, Jack Widman jack.wid...@gmail.comwrote: C:\work\widman\src\main\scala\com\widman\comet\PackComet.scala:20: error: type CometListener is not a member of package net.liftweb.http I got this compile error. I must be missing something obvious. It's part of Lift 1.1, not Lift 1.0 On Thu, Nov 12, 2009 at 11:42 PM, Ross Mellgren dri...@gmail.comwrote: It is in net.liftweb.http. http://www.scala-tools.org/mvnsites-snapshots/liftweb/lift-webkit/scaladocs/net/liftweb/http/CometListener.html By the way, the link you gave only indicates it's in either net.liftweb.http, net.liftweb.util, net.liftweb or model (or a couple other packages, since scala implicitly imports superpackages). -Ross On Nov 12, 2009, at 11:38 PM, jack wrote: I also tried net.liftweb.http On Nov 12, 11:35 pm, jack jack.wid...@gmail.com wrote: I am trying to use CometListener. According tohttp://bit.ly/1Wnxt4, it is in the package net.liftweb._ but compiler says it can't be found. Is this the wrong package? -- Jack Widman co-founder / cto, Authoritude, Inc. 203-641-9355 -- Lift, the simply functional web framework http://liftweb.net Beginning Scala http://www.apress.com/book/view/1430219890 Follow me: http://twitter.com/dpp Surf the harmonics -- Jack Widman co-founder / cto, Authoritude, Inc. 203-641-9355 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: CometActor and render
Sorry. Just reread my past post and it is indeed unclear. I will post
running code tonight. I very much appreciate your help.
On Tue, Nov 10, 2009 at 1:27 AM, David Pollak feeder.of.the.be...@gmail.com
wrote:
On Mon, Nov 9, 2009 at 10:10 PM, Jack Widman jack.wid...@gmail.comwrote:
The only difference between your working code and mine is that mine has a
process in the background that is always running and puts Foo objects on a
queue whenever they are ready. Where can I start this long running process
so that it doesn't interfere with the lowPriority method that takes things
off the queue and rerenders the page. I tried starting the process in its
own Actor that I start in localSetup but it seems somehow to be blocking the
lowPriority method from doing its thing.
I have no idea what this means... sorry.
Please post actual runnable code and we can help you debug.
On Sun, Nov 8, 2009 at 11:35 PM, David Pollak
feeder.of.the.be...@gmail.com wrote:
Jack,
I reproduced your code and it seems to work fine. I've enclosed a
working copy.
Some comments about your code:
- The foos variable and the foo variable may be getting confused in
the code... the render method may be rendering the same thing based on
the
unchanging foos variable.
- Doing null testing is a sign that you have logic errors in your
code. I strongly recommend using either Box or Option for everything
that
can logically not contain a value/reference. If you're bridging out to
Java
code and are expecting null from the Java code, write a small bridge that
will wrapper the Java return values in Box/Option.
- You have a case class (Tick) that contains no parameters. Please
use a case object instead.
- Your Tick look is a spin loop. You fire a Tick message as part of
processing the Tick message. I would suggest that if you're polling,
that
you have a reasonable poll interval, otherwise you'll starve your CPU.
Further, having reRender on each loop through means that you're forcing a
lot of bytes over the wire rather than only doing a reRender on changed
values.
Thanks,
David
On Sun, Nov 8, 2009 at 3:47 PM, Jack Widman jack.wid...@gmail.comwrote:
Sorry. Here it is: As I said, I know that when render is called,
foo.getValue has the right value. But it does not show on the screen,
unless
I refresh the browser.
package com.foo.comet
import net.liftweb._
import http._
import js._
import JsCmds._
import net.liftweb.util._
import net.liftweb.http._
import _root_.scala.xml._
import scala.actors._
import com.authoritude.snippet._
import scala.collection.mutable.Queue
import net.liftweb.http.SessionVar
class MyComet extends CometActor {
override def defaultPrefix = Full(auth)
private var foos = FooManager.getFoos
def createDisplay(foos:List[Foo]):NodeSeq = {
span id=gotable
{
for {foo - foos} yield trtd{foo.getValue}/td/tr
}
/table/span
}
def render = { bind(foo - createDisplay(foos)) }
override def localSetup = {
super.localSetup
this ! Tick
}
var foo:Foo = null
override def lowPriority = {
case Tick = {
foo=FooQueue.getLatest
if (foo!=null foo.getValue -1) {
blogs = FooManager.process(foo, foos)
} else if (foo!=null){
foos = foos.remove((f:Foo)=(f.id==foo.id))
}
reRender(false)
this ! Tick
}
}
}
case class Tick
On Sun, Nov 8, 2009 at 5:31 AM, Timothy Perrett
timo...@getintheloop.eu wrote:
Without posting your code it's going to be tough to help you.
Cheers, Tim
Sent from my iPhone
On 8 Nov 2009, at 08:14, jack jack.wid...@gmail.com wrote:
By the way, I know that when render is called, all the variables have
the right values. I just don't see it on the screen unless I refresh
it.
On Nov 8, 3:12 am, jack jack.wid...@gmail.com wrote:
I have a CometActor. render is called when it is supposed to be but
I
don't see the changes. If I refresh the page at anytime, I do see
the
changes. Any idea what might cause this?
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email
[Lift] Re: CometActor and render
The only difference between your working code and mine is that mine has a
process in the background that is always running and puts Foo objects on a
queue whenever they are ready. Where can I start this long running process
so that it doesn't interfere with the lowPriority method that takes things
off the queue and rerenders the page. I tried starting the process in its
own Actor that I start in localSetup but it seems somehow to be blocking the
lowPriority method from doing its thing.
On Sun, Nov 8, 2009 at 11:35 PM, David Pollak feeder.of.the.be...@gmail.com
wrote:
Jack,
I reproduced your code and it seems to work fine. I've enclosed a working
copy.
Some comments about your code:
- The foos variable and the foo variable may be getting confused in the
code... the render method may be rendering the same thing based on the
unchanging foos variable.
- Doing null testing is a sign that you have logic errors in your
code. I strongly recommend using either Box or Option for everything that
can logically not contain a value/reference. If you're bridging out to
Java
code and are expecting null from the Java code, write a small bridge that
will wrapper the Java return values in Box/Option.
- You have a case class (Tick) that contains no parameters. Please use
a case object instead.
- Your Tick look is a spin loop. You fire a Tick message as part of
processing the Tick message. I would suggest that if you're polling, that
you have a reasonable poll interval, otherwise you'll starve your CPU.
Further, having reRender on each loop through means that you're forcing a
lot of bytes over the wire rather than only doing a reRender on changed
values.
Thanks,
David
On Sun, Nov 8, 2009 at 3:47 PM, Jack Widman jack.wid...@gmail.com wrote:
Sorry. Here it is: As I said, I know that when render is called,
foo.getValue has the right value. But it does not show on the screen, unless
I refresh the browser.
package com.foo.comet
import net.liftweb._
import http._
import js._
import JsCmds._
import net.liftweb.util._
import net.liftweb.http._
import _root_.scala.xml._
import scala.actors._
import com.authoritude.snippet._
import scala.collection.mutable.Queue
import net.liftweb.http.SessionVar
class MyComet extends CometActor {
override def defaultPrefix = Full(auth)
private var foos = FooManager.getFoos
def createDisplay(foos:List[Foo]):NodeSeq = {
span id=gotable
{
for {foo - foos} yield trtd{foo.getValue}/td/tr
}
/table/span
}
def render = { bind(foo - createDisplay(foos)) }
override def localSetup = {
super.localSetup
this ! Tick
}
var foo:Foo = null
override def lowPriority = {
case Tick = {
foo=FooQueue.getLatest
if (foo!=null foo.getValue -1) {
blogs = FooManager.process(foo, foos)
} else if (foo!=null){
foos = foos.remove((f:Foo)=(f.id==foo.id))
}
reRender(false)
this ! Tick
}
}
}
case class Tick
On Sun, Nov 8, 2009 at 5:31 AM, Timothy Perrett
timo...@getintheloop.euwrote:
Without posting your code it's going to be tough to help you.
Cheers, Tim
Sent from my iPhone
On 8 Nov 2009, at 08:14, jack jack.wid...@gmail.com wrote:
By the way, I know that when render is called, all the variables have
the right values. I just don't see it on the screen unless I refresh
it.
On Nov 8, 3:12 am, jack jack.wid...@gmail.com wrote:
I have a CometActor. render is called when it is supposed to be but I
don't see the changes. If I refresh the page at anytime, I do see the
changes. Any idea what might cause this?
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/liftweb?hl=en
-~--~~~~--~~--~--~---
[Lift] Re: CometActor and render
Sorry. Here it is: As I said, I know that when render is called,
foo.getValue has the right value. But it does not show on the screen, unless
I refresh the browser.
package com.foo.comet
import net.liftweb._
import http._
import js._
import JsCmds._
import net.liftweb.util._
import net.liftweb.http._
import _root_.scala.xml._
import scala.actors._
import com.authoritude.snippet._
import scala.collection.mutable.Queue
import net.liftweb.http.SessionVar
class MyComet extends CometActor {
override def defaultPrefix = Full(auth)
private var foos = FooManager.getFoos
def createDisplay(foos:List[Foo]):NodeSeq = {
span id=gotable
{
for {foo - foos} yield trtd{foo.getValue}/td/tr
}
/table/span
}
def render = { bind(foo - createDisplay(foos)) }
override def localSetup = {
super.localSetup
this ! Tick
}
var foo:Foo = null
override def lowPriority = {
case Tick = {
foo=FooQueue.getLatest
if (foo!=null foo.getValue -1) {
blogs = FooManager.process(foo, foos)
} else if (foo!=null){
foos = foos.remove((f:Foo)=(f.id==foo.id))
}
reRender(false)
this ! Tick
}
}
}
case class Tick
On Sun, Nov 8, 2009 at 5:31 AM, Timothy Perrett timo...@getintheloop.euwrote:
Without posting your code it's going to be tough to help you.
Cheers, Tim
Sent from my iPhone
On 8 Nov 2009, at 08:14, jack jack.wid...@gmail.com wrote:
By the way, I know that when render is called, all the variables have
the right values. I just don't see it on the screen unless I refresh
it.
On Nov 8, 3:12 am, jack jack.wid...@gmail.com wrote:
I have a CometActor. render is called when it is supposed to be but I
don't see the changes. If I refresh the page at anytime, I do see the
changes. Any idea what might cause this?
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/liftweb?hl=en
-~--~~~~--~~--~--~---
[Lift] Re: CometActor and render
Thanks David. This is a big help. Can you tell me exactly how lowPriority,
mediumPriorty and highPriority work? When are they called?
On Sun, Nov 8, 2009 at 11:35 PM, David Pollak feeder.of.the.be...@gmail.com
wrote:
Jack,
I reproduced your code and it seems to work fine. I've enclosed a working
copy.
Some comments about your code:
- The foos variable and the foo variable may be getting confused in the
code... the render method may be rendering the same thing based on the
unchanging foos variable.
- Doing null testing is a sign that you have logic errors in your
code. I strongly recommend using either Box or Option for everything that
can logically not contain a value/reference. If you're bridging out to
Java
code and are expecting null from the Java code, write a small bridge that
will wrapper the Java return values in Box/Option.
- You have a case class (Tick) that contains no parameters. Please use
a case object instead.
- Your Tick look is a spin loop. You fire a Tick message as part of
processing the Tick message. I would suggest that if you're polling, that
you have a reasonable poll interval, otherwise you'll starve your CPU.
Further, having reRender on each loop through means that you're forcing a
lot of bytes over the wire rather than only doing a reRender on changed
values.
Thanks,
David
On Sun, Nov 8, 2009 at 3:47 PM, Jack Widman jack.wid...@gmail.com wrote:
Sorry. Here it is: As I said, I know that when render is called,
foo.getValue has the right value. But it does not show on the screen, unless
I refresh the browser.
package com.foo.comet
import net.liftweb._
import http._
import js._
import JsCmds._
import net.liftweb.util._
import net.liftweb.http._
import _root_.scala.xml._
import scala.actors._
import com.authoritude.snippet._
import scala.collection.mutable.Queue
import net.liftweb.http.SessionVar
class MyComet extends CometActor {
override def defaultPrefix = Full(auth)
private var foos = FooManager.getFoos
def createDisplay(foos:List[Foo]):NodeSeq = {
span id=gotable
{
for {foo - foos} yield trtd{foo.getValue}/td/tr
}
/table/span
}
def render = { bind(foo - createDisplay(foos)) }
override def localSetup = {
super.localSetup
this ! Tick
}
var foo:Foo = null
override def lowPriority = {
case Tick = {
foo=FooQueue.getLatest
if (foo!=null foo.getValue -1) {
blogs = FooManager.process(foo, foos)
} else if (foo!=null){
foos = foos.remove((f:Foo)=(f.id==foo.id))
}
reRender(false)
this ! Tick
}
}
}
case class Tick
On Sun, Nov 8, 2009 at 5:31 AM, Timothy Perrett
timo...@getintheloop.euwrote:
Without posting your code it's going to be tough to help you.
Cheers, Tim
Sent from my iPhone
On 8 Nov 2009, at 08:14, jack jack.wid...@gmail.com wrote:
By the way, I know that when render is called, all the variables have
the right values. I just don't see it on the screen unless I refresh
it.
On Nov 8, 3:12 am, jack jack.wid...@gmail.com wrote:
I have a CometActor. render is called when it is supposed to be but I
don't see the changes. If I refresh the page at anytime, I do see the
changes. Any idea what might cause this?
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/liftweb?hl=en
-~--~~~~--~~--~--~---
[Lift] Re: using Dispatch library for Http
Thanks Ross, I'll try it.
On Thu, Nov 5, 2009 at 11:51 PM, Ross Mellgren dri...@gmail.com wrote:
Many exceptions do not have a message, e.g. NullPointerException
(unless thrown by hand).
Maybe:
try {
...
} catch {
case ex: Exception if ex.getMessage == null = Message: +
ex.toString
case ex: Exception = Message: + ex.getMessage
}
-Ross
On Nov 5, 2009, at 11:45 PM, jack wrote:
I'm using the Dispatch Databinder library for Http. http://bit.ly/NPWcW
My code is this simple method.
def testCheckPage(url:String):String = {
try {
var http = new Http
var request = new Request
(url)
val req_with_agent = request : Map(User-Agent - Mozilla/
5.0)
val responseBody = Http (req_with_agent as_str)
responseBody.length.toString
} catch {
case ex: Exception = {
Message: + ex.getMessage
}
}
}
For some urls, e.g., http://bae.cf.huffingtonpost.com/ , an exception
is thrown but the exception message is null. Any ideas?
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
For more options, visit this group at
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-~--~~~~--~~--~--~---
[Lift] Re: using Dispatch library for Http
Tried and I see now that the exception is java.nio.BufferUnderflowException
Any idea what might be causing this?
On Thu, Nov 5, 2009 at 11:51 PM, Ross Mellgren dri...@gmail.com wrote:
Many exceptions do not have a message, e.g. NullPointerException
(unless thrown by hand).
Maybe:
try {
...
} catch {
case ex: Exception if ex.getMessage == null = Message: +
ex.toString
case ex: Exception = Message: + ex.getMessage
}
-Ross
On Nov 5, 2009, at 11:45 PM, jack wrote:
I'm using the Dispatch Databinder library for Http. http://bit.ly/NPWcW
My code is this simple method.
def testCheckPage(url:String):String = {
try {
var http = new Http
var request = new Request
(url)
val req_with_agent = request : Map(User-Agent - Mozilla/
5.0)
val responseBody = Http (req_with_agent as_str)
responseBody.length.toString
} catch {
case ex: Exception = {
Message: + ex.getMessage
}
}
}
For some urls, e.g., http://bae.cf.huffingtonpost.com/ , an exception
is thrown but the exception message is null. Any ideas?
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
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For more options, visit this group at
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-~--~~~~--~~--~--~---
[Lift] Re: regular expression
Thanks Derek. Will do. On Mon, Nov 2, 2009 at 3:45 PM, Derek Chen-Becker dchenbec...@gmail.comwrote: From the Scaladoc for scala.util.matching.Regex: You can use special pattern syntax construct (?idmsux-idmsux) to switch various regex compilation options like CASE_INSENSITIVE or UNICODE_CASE. See java.util.regex.Pattern javadoc for details. Probably better to ask Scala questions on the Scala list(s). On Mon, Nov 2, 2009 at 10:28 AM, jack jack.wid...@gmail.com wrote: I am using the findAllIn function for regular expressions. How do I make it ignore case? I know its simple but I can't find it. -- Jack Widman co-founder / cto, Authoritude, Inc. 203-641-9355 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: global exception page
Yes. Thanks alot Tim.
On Wed, Oct 28, 2009 at 9:32 AM, Timothy Perrett timo...@getintheloop.euwrote:
Jack,
LiftRules.exceptionHandler.prepend {
case (Props.RunModes.Production, r, e) = {
Log.error(IMPORTANT IMPORTANT IMPORTANT: Unhandeled error
occoured!!,e)
// your LiftResponse here
RedirectResponse(/error)
}
}
Does that clear it up for you...?
Cheers, Tim
On 28 Oct 2009, at 13:17, jack wrote:
I would like to have one error page that appears when any exception
occurs. How would I do that?
--
Jack Widman
co-founder / cto, Authoritude, Inc.
203-641-9355
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
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To unsubscribe from this group, send email to
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For more options, visit this group at
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-~--~~~~--~~--~--~---
[Lift] Re: 1.1
Thanks Tim. And next time I will search more before asking. On Sun, Oct 25, 2009 at 2:26 PM, Timothy Perrett timo...@getintheloop.euwrote: Jack, This question has been asked quite a number of times recently on list. Change: version1.0/version on the liftweb dependencies in your pom.xml to be: version1.1-SNAPSHOT/version That will give you the latest HEAD build. If you want a known point in time, use M6: version1.1-M6/version Cheers, Tim On Oct 25, 6:00 pm, jack jack.wid...@gmail.com wrote: I have been using lift 1.0. What is the best way to upgrade to 1.1? -- Jack Widman co-founder / cto, Authoritude, Inc. 203-641-9355 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: html not being evalutated
Oops. I just noticed I made source.body a String and not a NodeSeq.
Sometimes source.body is text with html tags in it. Like -
Hey dude, bwhat/b are you doing?
I guess I should make it a NodeSeq. Sorry about that.
Jack
On Wed, Oct 21, 2009 at 9:33 AM, David Pollak feeder.of.the.be...@gmail.com
wrote:
On Wed, Oct 21, 2009 at 6:32 AM, jack jack.wid...@gmail.com wrote:
Let's say source.body is ahref=google.comSearch/a. If I put
source.body in a span like this -
span{source.body}/span
source.body will be converted to text and the actual link tags will be
displayed. What is the right way to do this?
How was source.body generated?
On Oct 21, 9:06 am, David Pollak feeder.of.the.be...@gmail.com
wrote:
On Tue, Oct 20, 2009 at 10:16 PM, jack jack.wid...@gmail.com wrote:
OK, I see why this is happening. the {exp} in the NodeSeq convert exp
to a String. So I did by creating a string and then converting it to a
NodeSeq at the end. Is there a way to do this without using and
intermediary string?
I don't know what a source is, but you really, really have to be careful
about promoting a String to a NodeSeq. If the String has user-generated
content in it, then you've got a cross-site scripting vulnerability
waiting
to happen. For user-generated content, I suggest using Textile parser
built
into Lift.
In any case, if you don't have a NodeSeq in your data structure, you'll
have
to parse it into XML before displaying it.
On Oct 21, 1:03 am, jack jack.wid...@gmail.com wrote:
I have the following method display. source.body has html tags in it
but the actual tags are showing instead of being evaluated. e.g. I'm
seeing things like 'bHey There/b' instead of 'Hey There' in
bold.
This method is in a CometActor and is running when the page is
rendered. Am I missing something obvious?
def display(sources:List[Source]):NodeSeq = {
span id=jooptable
{
for {source - sources} yield trtd{source.body}/td/tr
}
/table
/span
}
--
Lift, the simply functional web frameworkhttp://liftweb.net
Beginning Scalahttp://www.apress.com/book/view/1430219890
Follow me:http://twitter.com/dpp
Surf the harmonics
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
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-~--~~~~--~~--~--~---
[Lift] Re: Newbie post: Where are the basics and best practices?
Just wanted to say that I have never seen a community like this. Its
fantastic!
On Wed, Oct 21, 2009 at 11:05 PM, David Pollak
feeder.of.the.be...@gmail.com wrote:
On Wed, Oct 21, 2009 at 4:15 PM, Strom strommo...@gmail.com wrote:
Hello everyone,
I am pretty much brand new to lift and scala, and I come from a non-
framework jsp/java servlet/hibernate background. I've been reading
this board, Beginning Scala, The lift book, and googling how to use
the lift framework, but I can't seem to find some basic info.
That's why we're here. Ask away!
Please
help me out. I know these are very basic questions, and posting on the
group was a last resort after coming up empty on searches. I want to
start off with best practices since I'm beginning from scratch.
Doing some searching is great, but asking on list is heartily encouraged.
1. Directory structure - where is everything?
Looking at the PocketChange example and making a basic lift 1.0
project via netbeans, I know that the DB schema go under model, the
snippets in snippet, the templates in the corresponding webapp/
templates-hidden directory, and the web pages in the webapp
directory.
What I don't know is where /classpath or lift:CSS.blueprint are
actually going. Is classpath still going to src/main/resources/
toserve, or is that old info? Looking at the default.html template,
there's no jquery.js or CSS files in a toserve directory; in fact
there is no toserve directory period, so I made my own. Also I see
lift:CSS.blueprint, and I have no idea where that's going. I don't
see any CSS class with blueprint method, but the syntax looks clean
and I'd like to add my own custom stylesheet in the same fashion.
The /classpath stuff is served out of the Lift JAR file rather than out of
a directory. If you want to have your own CSS, just put it in
/src/webapp/css/xxx.css and then refer to /css/xxx.css in your web page.
2. Dynamically generated HTML - what's the best practice, and how to
do it?
Snippets are the way that Lift does dynamic HTML. It's not a templating
system, but a binding between your XHTML file and methods on classes that
substitute the dynamically generated HTML.
I would like to know what the lift equivalent is for the following:
a href=%=request.getContextPath()%/home/index.jspIndex/a
In the case of Lift, you don't have to do this. a
href=/home/indexindex/a will automatically be rewritten for the correct
context path. No work on your part.
That's the way I was taught to link web pages together because it
avoids hardcoding the page location, but the main point is the stuff
inside %=...%. It looks like the lift uses {...}, but this example
from the lift book causes an IllegalArgumentException (bad XML
according to the msgs I've found on this board):
link type=text/css rel=stylesheet href=
{LiftRules.resourceServerPath + /css/style.css } /
If you're writing Scala, then you can do substitutions like the one above,
but Lift's views are not like JSP templates. In the above case, you can
simply say:
link type=text/css rel=stylesheet href=/css/style.css/
And it will be automatically updated based on the context path.
How do I go about making this work, and in what scenarios should I be
using this {...} approach vs snippets?
Note: An earlier example in the lift book used href=/classpath/css/
style.css, but later on said that the 1st method is better. The basic
lift archetype references /classpath everywhere as well, so I don't
know what to believe.
I guess those are the glaring questions I have right now. In addition,
what are some common search terms I could use to find this sort of
basic info on the board, or where can I find best practices info and
more examples of working sites? I'd rather see what documentation/
tutorials already exists for beginners before I send more messages for
the board, but my main issue is knowing whether or not I'm getting the
right information; most every lift example document/wiki/tutorial I've
seen is outdated code or incomplete. I'm looking for more code
examples that comply with lift's current evolution. The lift book is
helpful, but I also feel a little left out when I read it because I
get the feeling the book assumes the reader knows certain lift and
scala basics that are obvious to more seasoned users, but not to...me.
Thank you so much for your help!
Sure thing.
Welcome to the community.
Thanks,
David
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack
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[Lift] Re: does this look ok?
yes. I think I found the problem elsewhere in the logic. thanks.
On Sun, Oct 18, 2009 at 11:07 PM, Naftoli Gugenheim naftoli...@gmail.comwrote:
I think so... Does it compile?
On Sun, Oct 18, 2009 at 7:13 PM, jack jack.wid...@gmail.com wrote:
Does this code look ok?
def createDisplay(blogs:List[Blog]):NodeSeq = {
span id=scoretable
{
for {blog - blogs} yield trtda href={blog.url}{blog.url}/
a/tdtd {blog.title}/td/tr
}
/table/span
}
def render = { bind(joop - createDisplay(blogs)) }
--
Jack
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[Lift] Re: The quality of the Lift list [was: Don't shoot the non-XML messenger ...]
The necessity of this kind of action (the banning) is absolutely no sign of anything having been done wrong. There will ALWAYS be people like that. On Wed, Oct 14, 2009 at 3:31 PM, koveen liep...@xs4all.nl wrote: I think that when someone enters a group, expecting to be shot, it is a very kind act only to ban him. Ko On Oct 14, 7:49 pm, David Pollak feeder.of.the.be...@gmail.com wrote: Folks, It is not lightly that I ban someone from the group... this is only the second time I've banned a substantive poster. I'm going to discuss some of the process and then touch on some of the substance of the questions that the poster was getting at. The Lift community, reflected on this list, is an inquisitive, friendly place where people who have a passion for building great web apps converge and contribute to making Lift a really great open source framework. Newbies are the lifeblood of the group because they come with fresh perspectives and new ways of looking at things. Questions from newbies help us refine and enhance Lift and the associated documentation. Folks who are building production apps on Lift receive the fastest turn-around because these folks are betting their careers and their enterprises (even enterprises of one) on Lift and they deserve the best support in the industry for taking this risk. A big part of why this community is successful (in terms of size, quality of discussion, and quality of results) is because we keep the quality of discussion high. How do we do this? The folks who have been on the list generally keep the level of discussion to the Lift ideals. We reward newbies with quick answers and encourage friendly discourse. We are generally slower to respond to those that are less reflective of the list ideals. I warn folks who are pushing boundaries (usually privately, but every once in a while publicly) and where the line is. In this case, nothing worked. The poster was neither asking questions, giving usable feedback, or being polite in his engagement with the folks on the list. I received a substantial number of private communications about this poster (which is pretty rare), and I took action. In terms of the substance, let me address to threat issue first. I threatened to ban the poster from the list. Perhaps DHH or Martin would not make such a threat. I am very sure that the quality of discussion on the Lift list is higher than that on the Rails list (one of the reasons I started Lift was to be part of a nicer community.) One cost of having a nicer place is excluding those who do not fit. The second threat I made was to relay a tongue-in-cheek private communication I received about the poster to the list (after receiving the okay from the guy that made the communication to me.) This threat was obvious, using video game rating language http://www.esrb.org/ratings/ratings_guide.jsp, Comic mischief and Cartoon violence. It was something that even a 6 year old can distinguish from reality. Put another way, the poster was talking about Kafkaesque experiences with using Lift and I responded with Jonesian http://www.youtube.com/watch?v=CrupqdGvsocfeature=PlayListp=62FED00.. .language. In terms of the broader issue of Lift's HTML templating system being XHTML only, yes, that's true. Lift treats HTML templates as XML. Lift's templating system is not a String templating system but an XML templating system. This satisfies the needs to render content to HTML browsers. If there are needs for generating other kinds of content, Lift is not as good, but in many cases there are better libraries for doing so. Lift makes it very simple to integrate other rendering/templating engines into Lift, usually with a single line of code the dispatches the HTTP request to an alternate provider of a LiftResponse. If the poster had simply said, I want to template non-HTML output, can you show me how? he would have gotten a nice example (and I might have even rolled it into demo.liftweb.net or maybe Tim might have blogged about it. Keeping things in XML has a number of advantages and a few disadvantages. First, the disadvantages: (1) you can't template non-XHTML responses and (2) everything must be well formed XML. The advantages are (1) security (2) performance (it's easier to cache XML and the cost of mutating XML trees is O(log N)), (3) there is better separation of logic from the view (perhaps Terrance Parr's String Template library achieves this level of separation), and (4) the ability to mutate the resulting page (rewrite tags, move stuff to head/tail, consolidate scripts) is more performant and less error-prone than doing the same with a String-based representation. I will address Bill's security question. For String-based rendering systems that emit HTML, the developer is the one who must make a decision at
[Lift] Re: The quality of the Lift list [was: Don't shoot the non-XML messenger ...]
Not to harp on it but: *When some sycophants of Seaside got, nasty, I did not walk away from Seaside, warts and all. * suggests this person has had this problem elsewhere. On Wed, Oct 14, 2009 at 3:37 PM, Jack Widman jack.wid...@gmail.com wrote: The necessity of this kind of action (the banning) is absolutely no sign of anything having been done wrong. There will ALWAYS be people like that. On Wed, Oct 14, 2009 at 3:31 PM, koveen liep...@xs4all.nl wrote: I think that when someone enters a group, expecting to be shot, it is a very kind act only to ban him. Ko On Oct 14, 7:49 pm, David Pollak feeder.of.the.be...@gmail.com wrote: Folks, It is not lightly that I ban someone from the group... this is only the second time I've banned a substantive poster. I'm going to discuss some of the process and then touch on some of the substance of the questions that the poster was getting at. The Lift community, reflected on this list, is an inquisitive, friendly place where people who have a passion for building great web apps converge and contribute to making Lift a really great open source framework. Newbies are the lifeblood of the group because they come with fresh perspectives and new ways of looking at things. Questions from newbies help us refine and enhance Lift and the associated documentation. Folks who are building production apps on Lift receive the fastest turn-around because these folks are betting their careers and their enterprises (even enterprises of one) on Lift and they deserve the best support in the industry for taking this risk. A big part of why this community is successful (in terms of size, quality of discussion, and quality of results) is because we keep the quality of discussion high. How do we do this? The folks who have been on the list generally keep the level of discussion to the Lift ideals. We reward newbies with quick answers and encourage friendly discourse. We are generally slower to respond to those that are less reflective of the list ideals. I warn folks who are pushing boundaries (usually privately, but every once in a while publicly) and where the line is. In this case, nothing worked. The poster was neither asking questions, giving usable feedback, or being polite in his engagement with the folks on the list. I received a substantial number of private communications about this poster (which is pretty rare), and I took action. In terms of the substance, let me address to threat issue first. I threatened to ban the poster from the list. Perhaps DHH or Martin would not make such a threat. I am very sure that the quality of discussion on the Lift list is higher than that on the Rails list (one of the reasons I started Lift was to be part of a nicer community.) One cost of having a nicer place is excluding those who do not fit. The second threat I made was to relay a tongue-in-cheek private communication I received about the poster to the list (after receiving the okay from the guy that made the communication to me.) This threat was obvious, using video game rating language http://www.esrb.org/ratings/ratings_guide.jsp, Comic mischief and Cartoon violence. It was something that even a 6 year old can distinguish from reality. Put another way, the poster was talking about Kafkaesque experiences with using Lift and I responded with Jonesian http://www.youtube.com/watch?v=CrupqdGvsocfeature=PlayListp=62FED00.. .language. In terms of the broader issue of Lift's HTML templating system being XHTML only, yes, that's true. Lift treats HTML templates as XML. Lift's templating system is not a String templating system but an XML templating system. This satisfies the needs to render content to HTML browsers. If there are needs for generating other kinds of content, Lift is not as good, but in many cases there are better libraries for doing so. Lift makes it very simple to integrate other rendering/templating engines into Lift, usually with a single line of code the dispatches the HTTP request to an alternate provider of a LiftResponse. If the poster had simply said, I want to template non-HTML output, can you show me how? he would have gotten a nice example (and I might have even rolled it into demo.liftweb.netor maybe Tim might have blogged about it. Keeping things in XML has a number of advantages and a few disadvantages. First, the disadvantages: (1) you can't template non-XHTML responses and (2) everything must be well formed XML. The advantages are (1) security (2) performance (it's easier to cache XML and the cost of mutating XML trees is O(log N)), (3) there is better separation of logic from the view (perhaps Terrance Parr's String Template library achieves this level of separation), and (4) the ability to mutate the resulting page (rewrite tags, move stuff to head/tail
[Lift] Re: The quality of the Lift list [was: Don't shoot the non-XML messenger ...]
fyi http://developers.curl.com/people/rshiplett On Wed, Oct 14, 2009 at 3:40 PM, Jack Widman jack.wid...@gmail.com wrote: Not to harp on it but: *When some sycophants of Seaside got, nasty, I did not walk away from Seaside, warts and all. * suggests this person has had this problem elsewhere. On Wed, Oct 14, 2009 at 3:37 PM, Jack Widman jack.wid...@gmail.comwrote: The necessity of this kind of action (the banning) is absolutely no sign of anything having been done wrong. There will ALWAYS be people like that. On Wed, Oct 14, 2009 at 3:31 PM, koveen liep...@xs4all.nl wrote: I think that when someone enters a group, expecting to be shot, it is a very kind act only to ban him. Ko On Oct 14, 7:49 pm, David Pollak feeder.of.the.be...@gmail.com wrote: Folks, It is not lightly that I ban someone from the group... this is only the second time I've banned a substantive poster. I'm going to discuss some of the process and then touch on some of the substance of the questions that the poster was getting at. The Lift community, reflected on this list, is an inquisitive, friendly place where people who have a passion for building great web apps converge and contribute to making Lift a really great open source framework. Newbies are the lifeblood of the group because they come with fresh perspectives and new ways of looking at things. Questions from newbies help us refine and enhance Lift and the associated documentation. Folks who are building production apps on Lift receive the fastest turn-around because these folks are betting their careers and their enterprises (even enterprises of one) on Lift and they deserve the best support in the industry for taking this risk. A big part of why this community is successful (in terms of size, quality of discussion, and quality of results) is because we keep the quality of discussion high. How do we do this? The folks who have been on the list generally keep the level of discussion to the Lift ideals. We reward newbies with quick answers and encourage friendly discourse. We are generally slower to respond to those that are less reflective of the list ideals. I warn folks who are pushing boundaries (usually privately, but every once in a while publicly) and where the line is. In this case, nothing worked. The poster was neither asking questions, giving usable feedback, or being polite in his engagement with the folks on the list. I received a substantial number of private communications about this poster (which is pretty rare), and I took action. In terms of the substance, let me address to threat issue first. I threatened to ban the poster from the list. Perhaps DHH or Martin would not make such a threat. I am very sure that the quality of discussion on the Lift list is higher than that on the Rails list (one of the reasons I started Lift was to be part of a nicer community.) One cost of having a nicer place is excluding those who do not fit. The second threat I made was to relay a tongue-in-cheek private communication I received about the poster to the list (after receiving the okay from the guy that made the communication to me.) This threat was obvious, using video game rating language http://www.esrb.org/ratings/ratings_guide.jsp, Comic mischief and Cartoon violence. It was something that even a 6 year old can distinguish from reality. Put another way, the poster was talking about Kafkaesque experiences with using Lift and I responded with Jonesian http://www.youtube.com/watch?v=CrupqdGvsocfeature=PlayListp=62FED00.. .language. In terms of the broader issue of Lift's HTML templating system being XHTML only, yes, that's true. Lift treats HTML templates as XML. Lift's templating system is not a String templating system but an XML templating system. This satisfies the needs to render content to HTML browsers. If there are needs for generating other kinds of content, Lift is not as good, but in many cases there are better libraries for doing so. Lift makes it very simple to integrate other rendering/templating engines into Lift, usually with a single line of code the dispatches the HTTP request to an alternate provider of a LiftResponse. If the poster had simply said, I want to template non-HTML output, can you show me how? he would have gotten a nice example (and I might have even rolled it into demo.liftweb.netor maybe Tim might have blogged about it. Keeping things in XML has a number of advantages and a few disadvantages. First, the disadvantages: (1) you can't template non-XHTML responses and (2) everything must be well formed XML. The advantages are (1) security (2) performance (it's easier to cache XML and the cost of mutating XML trees is O(log N)), (3) there is better separation of logic from the view (perhaps Terrance Parr's String Template library
[Lift] Re: Naming CometActors
The naming each CometActor with a different name is working quite nicely. On Wed, Oct 7, 2009 at 5:51 PM, David Pollak feeder.of.the.be...@gmail.comwrote: On Wed, Oct 7, 2009 at 2:39 PM, Derek Chen-Becker dchenbec...@gmail.comwrote: It's been a while since I looked at this, but IIRC, the name for CometActor is there so that you can distinguish multiple actors on the same page. I don't think that you share a CometActor between multiple requests. I think that each request gets a new CometActor that's in place as long as the page is active. Multiple requests share the same CometActor given type/name. The CometActor lives until the session ends or until it times out based on its lifespan. Derek On Tue, Oct 6, 2009 at 1:28 PM, Jack Widman jack.wid...@gmail.comwrote: So if give a CometActor a static name, say Other, then every request will get the same running instance of the CometActor. But if I name it dynamically, say with a random string, each request will get its own instance of the CometActor. Right? -- Jack -- Lift, the simply functional web framework http://liftweb.net Beginning Scala http://www.apress.com/book/view/1430219890 Follow me: http://twitter.com/dpp Surf the harmonics -- Jack --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: execute code when browser is closed
I didn't mean to sound like I am justifying the way I am doing. I definitely
do not have a good feel for lift yet and it feels hackey to me too. Part of
it is I'm rushing to get a demo done at the same time I am learning lift.
Thanks for your help.
On Tue, Oct 6, 2009 at 2:04 AM, Timothy Perrett timo...@getintheloop.euwrote:
Hey jack,
As I said before, I think the design you have is wrong if your needing to
code in a hacky way such as this. The way you articulate the justification
for using shutdown almost certianly clarifies an incorrect design.
Personally I think you could use Ajax for this an have a much simpler
design of system... I would tend to recomend using comet when you have some
server side state that changes and needs update client side continually.
Kinda feel it's hammer to crack a nut here, but perhaps that's just me.
Hope you get it sorted :-)
Cheers, Tim
Sent from my iPhone
On 6 Oct 2009, at 05:25, Jack Widman jack.wid...@gmail.com wrote:
So I am using a snippet like this
def go:NodeSeq = {
var term:String = S.param(term).openOr()
lift:surround with=default at=content
lift:comet type=JoopComet name={term}
auth:joop/auth:joop
/lift:comet
/lift:surround
}
And the term is indeed different each time. But I am still getting the same
results from two different browsers with different terms.
On Tue, Oct 6, 2009 at 12:18 AM, Naftoli Gugenheim naftoli...@gmail.com
naftoli...@gmail.com wrote:
You are correct that Comet is a way to update information after the page
is loaded. I think there's a simpler way using ajax, but I haven't explored
those areas of Lift yet. But meanwhile you need to have the xml specifying
the comet actor be dynamic. So you need to have that xml be generated by a
snippet. A snippet is an XML to XML function.
-
jack jack.wid...@gmail.comjack.wid...@gmail.com wrote:
Let me start again. Maybe I am misunderstanding when Comet should be
used. In my application, people search for web pages. I do a lot of
processing for each resulting page. First I just display the links and
then as the processing is finished, the links on the page are
automatically modified with the data I just found for each link. This
is all working fine.
But, the session is being shared among all users so if I make one
search in one browser, and then make another search from another
browser, I get the results from the first browser.
David suggested I name each CometActor differently. That is not
working, though maybe I am not doing it right.
On Oct 6, 12:01 am, Naftoli Gugenheim naftoli...@gmail.com wrote:
What do you mean?
-
jackjack.wid...@gmail.com wrote:
i guess you meant put the snippet right in the CometActor. Ok. Now I'm
getting it.
On Oct 5, 11:46 pm, Jack Widman jack.wid...@gmail.com wrote:
Sorry if this is a dumb question but in lift:comet type=Search
name={searchString}/, what is searchString? This is in an html file.
I am
obviously missing something.
On Mon, Oct 5, 2009 at 2:40 PM, David Pollak
feeder.of.the.be...@gmail.comfeeder.of.the.be...@gmail.comwrote:
On Mon, Oct 5, 2009 at 10:27 AM, Jack Widman jack.wid...@gmail.com
wrote:
Understood. My intention is to send a ShutDown message to the
CometActor
when somebody closes the browser. I need this so that when they
visit the
page in a browser again, the CometActor is 'reset'.
First, there's no way to determine if the browser window is closed.
Second, *DO NOT* send a ShutDown message to the CometActor. This is
an
internal Lift piece of housekeeping. If you do this, you will break
stuff.
Don't do it. (There is a reason the message is not private, but it
should
not be used for this purpose.)
CometActors can be named:
lift:comet type=Search name={searchString}/
You can then have a separate CometActor for each searchString.
Voila...
you get what you want. Now, how do you make then CometActor go away
when
it's not being used anymore?
In your CometActor:
override def lifespan: Box[TimeSpan] = Full(3 minutes)
That means if a CometActor does not appear on a page for 3 minutes,
it's
removed from the session. If the named CometActor is requested
again, a new
one will be created.
On Mon, Oct 5, 2009 at 1:18 PM, marius d. marius.dan...@gmail.com
wrote:
HTTP session termination does not equate with browser-close event.
Br's,
Marius
On Oct 5, 3:22 pm, Jack Widman jack.wid...@gmail.com wrote:
Yes, thats what I meant. Thanks
On Mon, Oct 5, 2009 at 4:10 AM, Timothy Perrett
timo...@getintheloop.euwrote:
But you can do it on session termination (which is what you
probably
want):
http://scala-tools.org/mvnsites-snapshots/liftweb/lift-webkit/scalado.
http://scala-tools.org/mvnsites-snapshots
[Lift] Re: Help!
Thanks David. The command I was trying to remember was deploy-war but I kept using run-war. The names are not quite precise. run-war should be called build-and-run-war, and deploy-war is really run-with-war. If those names were not so horribly long, that is. On Tue, Oct 6, 2009 at 3:05 AM, David Bernard david.bernard...@gmail.comwrote: To create a war : mvn package To deploy (outline), (war are bundles that need a WebApp server to run (eg : jetty, tomcat, glassfish, jboss,...): # install jetty on your server (not maven) ## start jetty ## try http://jetty.host:jetty.port/ (eg: http://127.0.0.1:8080/) ## stop # put your .war into the jetty/webapp dir ## start jetty ## try http://jetty.host:jetty.port/mywebapp (mywebapp is the basename of your .war, if you don't want context (mywebapp prefix, named your war ROOT.war) # optional tweak the jetty configuration (read the jetty doc) FYI : Tim Perret is working on solution to create standalone jar with jetty embedded (search in the mailing-list) If you don't use Comet, you could try the winstone-maven-plugin to create a runnable jar /davidB On Tue, Oct 6, 2009 at 05:31, jack jack.wid...@gmail.com wrote: never mind. deploy-war, not run-war (been working too hard) On Oct 5, 11:09 pm, Jack Widman jack.wid...@gmail.com wrote: I meant to say jetty:run-war On Mon, Oct 5, 2009 at 10:52 PM, jack jack.wid...@gmail.com wrote: Is mvn jetty:run supposed to creat the war file? I want to upload a war file and just run it, not create another one. How do I do that? -- Jack -- Jack --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Naming CometActors
So if give a CometActor a static name, say Other, then every request will get the same running instance of the CometActor. But if I name it dynamically, say with a random string, each request will get its own instance of the CometActor. Right? -- Jack --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: maven and jetty
I thought run uses classes and run-war uses the war. no? On Tue, Oct 6, 2009 at 4:54 PM, MarkChance mark.cha...@gmail.com wrote: I use mvn -Djetty.port=8090 jetty:run It builds the war and then runs jetty. If you leave it running and re- build the war, say in your IDE, the Jetty generally restarts automatically. HTH, Mark On Oct 5, 8:44 pm, Jack Widman jack.wid...@gmail.com wrote: Well it seems that mvn run-war is creating the war and overriding the one I just uploaded. How do I just run with a given war and not create the war. -- Jack --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: maven and jetty
I am picking up a very subtle insinuation that that question was too easy for this forum. I agree whole heartedly. Won't do it again. My next question is - Is P=NP? No wait, thats not appropriate. On Tue, Oct 6, 2009 at 5:07 PM, Timothy Perrett timo...@getintheloop.euwrote: Correct. :run uses the stuff under src/main/webapp vs :run-war that uses what is bundled in the war (surprise surprise!) This should all be explained in the maven-jetty-plugin docs as this is not something lift specific by any means. Cheers, Tim Sent from my iPhone On 6 Oct 2009, at 21:57, Jack Widman jack.wid...@gmail.com wrote: I thought run uses classes and run-war uses the war. no? On Tue, Oct 6, 2009 at 4:54 PM, MarkChance mark.cha...@gmail.com mark.cha...@gmail.com wrote: I use mvn -Djetty.port=8090 jetty:run It builds the war and then runs jetty. If you leave it running and re- build the war, say in your IDE, the Jetty generally restarts automatically. HTH, Mark On Oct 5, 8:44 pm, Jack Widman jack.wid...@gmail.com wrote: Well it seems that mvn run-war is creating the war and overriding the one I just uploaded. How do I just run with a given war and not create the war. -- Jack -- Jack --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: ShutDown and CometActor
Actually, this is working nicely now. Thanks. On Mon, Oct 5, 2009 at 11:46 AM, David Pollak feeder.of.the.be...@gmail.com wrote: When you send the shutdown message, oddly enough, the CometActor shuts down. You don't have to do this (in fact, don't do it). Lift will shut the CometActor down automatically. On Sun, Oct 4, 2009 at 7:32 PM, jack jack.wid...@gmail.com wrote: I am sending a ShutDown message to my CometActor to end the session. WHen I then go back to the CometActor, it is not working properly the way it did the first time. Is there anything I have to do after shutting down the session, or should it just work when I load the CometActor again? -- Lift, the simply functional web framework http://liftweb.net Beginning Scala http://www.apress.com/book/view/1430219890 Follow me: http://twitter.com/dpp Surf the harmonics -- Jack --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: How to share request scope data among snippets in Lift
Why don't we make Esperanto the official Lift language?
On Mon, Oct 5, 2009 at 11:52 AM, marius d. marius.dan...@gmail.com wrote:
On Oct 5, 6:15 pm, David Pollak feeder.of.the.be...@gmail.com wrote:
On Sun, Oct 4, 2009 at 2:41 AM, ishiijp yoshinori.is...@gmail.com
wrote:
Thank you for your example, David.
It will work in my purpose.
Cool.
It seems that my poor English and less information let some people
confused.
I appreciate that you have put in the work to translate your thoughts to
English. I apologize that I only speak English, but would love to speak
Japanese, German, Russian, and a few other languages.
oh you gotta learn Romanian :)
I need just a request scope data.
It means I want to share information between snippets across a
request.
(Is the expression request scope not good for in this case...?)
request scope is exactly the right phrase.
Thank all responsed my post,
and your suggestions are informative.
I think very nice community is here.
On 9月26日, 午後10:33, David Pollak feeder.of.the.be...@gmail.com wrote:
To share information between snippets during a request, use a
RequestVar:
object MyInfo extends RequestVar(calculate_value)
so
object MyInfo extends RequestVar[Box[Invoice]](Empty)
in one snippet, you may calculate the Invoice and put it in the
MyInfo:
MyInfo.set(Full(invoice))
In another snippet, you can extract:
for {
invoice - MyInfo.is
} yield ...
Note that the calculate_value is a call-by-name parameter, so it
will
be
invoked each time the RequestVar is uninitialized. You can place
lazy
calculation logic in here.
On Sat, Sep 26, 2009 at 12:14 AM, ishiijp yoshinori.is...@gmail.com
wrote:
Hi.
If my lift application have some data that cost to create, and I
want
to share it among snippets, how to do in Lift?
if such data are shared inside one snippet, I may use lazy val.
But I have no nice idea to share it among different snippts.
Thanks much.
--
Lift, the simply functional web frameworkhttp://liftweb.net
Beginning Scalahttp://www.apress.com/book/view/1430219890
Follow me:http://twitter.com/dpp
Surf the harmonics
--
Lift, the simply functional web frameworkhttp://liftweb.net
Beginning Scalahttp://www.apress.com/book/view/1430219890
Follow me:http://twitter.com/dpp
Surf the harmonics
--
Jack
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
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[Lift] Re: execute code when browser is closed
Understood. My intention is to send a ShutDown message to the CometActor when somebody closes the browser. I need this so that when they visit the page in a browser again, the CometActor is 'reset'. On Mon, Oct 5, 2009 at 1:18 PM, marius d. marius.dan...@gmail.com wrote: HTTP session termination does not equate with browser-close event. Br's, Marius On Oct 5, 3:22 pm, Jack Widman jack.wid...@gmail.com wrote: Yes, thats what I meant. Thanks On Mon, Oct 5, 2009 at 4:10 AM, Timothy Perrett timo...@getintheloop.eu wrote: But you can do it on session termination (which is what you probably want): http://scala-tools.org/mvnsites-snapshots/liftweb/lift-webkit/scalado. .. Checkout the method: registerCleanupFunc Cheers, Tim On Oct 5, 8:54 am, Viktor Klang viktor.kl...@gmail.com wrote: On Mon, Oct 5, 2009 at 6:50 AM, jack jack.wid...@gmail.com wrote: I would like to call a function when the browser is closed. How do I do this? You cannot reliably do this. -- Viktor Klang Blog: klangism.blogspot.com Twttr: viktorklang Lift Committer - liftweb.com AKKA Committer - akkasource.org Cassidy - github.com/viktorklang/Cassidy.git SoftPub founder:http://groups.google.com/group/softpub -- Jack -- Jack --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: execute code when browser is closed
Interesting. I will try that. And I won't send any more ShutDownMessages :)
Though I should add that each CometActor is doing a lot of processing. So I
it would be good if I could shut one down somehow when the user searches on
a new term. Timeout won't work because there is no way to know how long it
will take.
Maybe I could just kill all the actors directly that are doing the
processing.
On Mon, Oct 5, 2009 at 2:40 PM, David Pollak
feeder.of.the.be...@gmail.comwrote:
On Mon, Oct 5, 2009 at 10:27 AM, Jack Widman jack.wid...@gmail.comwrote:
Understood. My intention is to send a ShutDown message to the CometActor
when somebody closes the browser. I need this so that when they visit the
page in a browser again, the CometActor is 'reset'.
First, there's no way to determine if the browser window is closed.
Second, *DO NOT* send a ShutDown message to the CometActor. This is an
internal Lift piece of housekeeping. If you do this, you will break stuff.
Don't do it. (There is a reason the message is not private, but it should
not be used for this purpose.)
CometActors can be named:
lift:comet type=Search name={searchString}/
You can then have a separate CometActor for each searchString. Voila...
you get what you want. Now, how do you make then CometActor go away when
it's not being used anymore?
In your CometActor:
override def lifespan: Box[TimeSpan] = Full(3 minutes)
That means if a CometActor does not appear on a page for 3 minutes, it's
removed from the session. If the named CometActor is requested again, a new
one will be created.
On Mon, Oct 5, 2009 at 1:18 PM, marius d. marius.dan...@gmail.comwrote:
HTTP session termination does not equate with browser-close event.
Br's,
Marius
On Oct 5, 3:22 pm, Jack Widman jack.wid...@gmail.com wrote:
Yes, thats what I meant. Thanks
On Mon, Oct 5, 2009 at 4:10 AM, Timothy Perrett
timo...@getintheloop.euwrote:
But you can do it on session termination (which is what you probably
want):
http://scala-tools.org/mvnsites-snapshots/liftweb/lift-webkit/scalado...
Checkout the method:
registerCleanupFunc
Cheers, Tim
On Oct 5, 8:54 am, Viktor Klang viktor.kl...@gmail.com wrote:
On Mon, Oct 5, 2009 at 6:50 AM, jack jack.wid...@gmail.com
wrote:
I would like to call a function when the browser is closed. How
do I
do this?
You cannot reliably do this.
--
Viktor Klang
Blog: klangism.blogspot.com
Twttr: viktorklang
Lift Committer - liftweb.com
AKKA Committer - akkasource.org
Cassidy - github.com/viktorklang/Cassidy.git
SoftPub founder:http://groups.google.com/group/softpub
--
Jack
--
Jack
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
For more options, visit this group at
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-~--~~~~--~~--~--~---
[Lift] Re: execute code when browser is closed
In my app, when the user is done searching on one keyword, they click a link
which takes them back to the main search page. Thats the time when I wanted
the CometActor to stop. Otherwise there will be too many threads floating
around and performance will suffer.
On Mon, Oct 5, 2009 at 2:50 PM, David Pollak
feeder.of.the.be...@gmail.comwrote:
On Mon, Oct 5, 2009 at 11:45 AM, Jack Widman jack.wid...@gmail.comwrote:
Interesting. I will try that. And I won't send any more ShutDownMessages
:)
Though I should add that each CometActor is doing a lot of processing. So
I it would be good if I could shut one down somehow when the user searches
on a new term. Timeout won't work because there is no way to know how long
it will take.
Maybe I could just kill all the actors directly that are doing the
processing.
That's going to be even worse. You'll kill something out from under
Lift... it's going to cause a huge pile of pain.
You can remove an Actor from the session and that will cause ShutDown to be
sent to it, but depending on how the Actor was written it's not going to
stop processing its mailbox.
Bottom line... there's no way to tell if a user is not looking at a page
with an Actor anymore. The best way to deal with that is timing the Actor
out. It's going to take time (your timeout period), but it's the best way
to do it.
On Mon, Oct 5, 2009 at 2:40 PM, David Pollak
feeder.of.the.be...@gmail.com wrote:
On Mon, Oct 5, 2009 at 10:27 AM, Jack Widman jack.wid...@gmail.comwrote:
Understood. My intention is to send a ShutDown message to the CometActor
when somebody closes the browser. I need this so that when they visit the
page in a browser again, the CometActor is 'reset'.
First, there's no way to determine if the browser window is closed.
Second, *DO NOT* send a ShutDown message to the CometActor. This is an
internal Lift piece of housekeeping. If you do this, you will break stuff.
Don't do it. (There is a reason the message is not private, but it should
not be used for this purpose.)
CometActors can be named:
lift:comet type=Search name={searchString}/
You can then have a separate CometActor for each searchString. Voila...
you get what you want. Now, how do you make then CometActor go away when
it's not being used anymore?
In your CometActor:
override def lifespan: Box[TimeSpan] = Full(3 minutes)
That means if a CometActor does not appear on a page for 3 minutes, it's
removed from the session. If the named CometActor is requested again, a new
one will be created.
On Mon, Oct 5, 2009 at 1:18 PM, marius d. marius.dan...@gmail.comwrote:
HTTP session termination does not equate with browser-close event.
Br's,
Marius
On Oct 5, 3:22 pm, Jack Widman jack.wid...@gmail.com wrote:
Yes, thats what I meant. Thanks
On Mon, Oct 5, 2009 at 4:10 AM, Timothy Perrett
timo...@getintheloop.euwrote:
But you can do it on session termination (which is what you
probably
want):
http://scala-tools.org/mvnsites-snapshots/liftweb/lift-webkit/scalado.
..
Checkout the method:
registerCleanupFunc
Cheers, Tim
On Oct 5, 8:54 am, Viktor Klang viktor.kl...@gmail.com wrote:
On Mon, Oct 5, 2009 at 6:50 AM, jack jack.wid...@gmail.com
wrote:
I would like to call a function when the browser is closed. How
do I
do this?
You cannot reliably do this.
--
Viktor Klang
Blog: klangism.blogspot.com
Twttr: viktorklang
Lift Committer - liftweb.com
AKKA Committer - akkasource.org
Cassidy - github.com/viktorklang/Cassidy.git
SoftPub founder:http://groups.google.com/group/softpub
--
Jack
--
Jack
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/liftweb?hl=en
-~--~~~~--~~--~--~---
[Lift] Re: execute code when browser is closed
Because when the users searches on a new keyword, the actors that were
processing the results for the last keyword are still processing (some of
them). But I can just send each of those a message to stop processing, no?
No problem with that, right?
On Mon, Oct 5, 2009 at 3:02 PM, David Pollak
feeder.of.the.be...@gmail.comwrote:
On Mon, Oct 5, 2009 at 11:53 AM, Jack Widman jack.wid...@gmail.comwrote:
In my app, when the user is done searching on one keyword, they click a
link which takes them back to the main search page. Thats the time when I
wanted the CometActor to stop. Otherwise there will be too many threads
floating around and performance will suffer.
Why? Actors do not consume threads, they consume memory unless they are
actively processing a message.
On Mon, Oct 5, 2009 at 2:50 PM, David Pollak
feeder.of.the.be...@gmail.com wrote:
On Mon, Oct 5, 2009 at 11:45 AM, Jack Widman jack.wid...@gmail.comwrote:
Interesting. I will try that. And I won't send any more ShutDownMessages
:)
Though I should add that each CometActor is doing a lot of processing.
So I it would be good if I could shut one down somehow when the user
searches on a new term. Timeout won't work because there is no way to know
how long it will take.
Maybe I could just kill all the actors directly that are doing the
processing.
That's going to be even worse. You'll kill something out from under
Lift... it's going to cause a huge pile of pain.
You can remove an Actor from the session and that will cause ShutDown to
be sent to it, but depending on how the Actor was written it's not going to
stop processing its mailbox.
Bottom line... there's no way to tell if a user is not looking at a page
with an Actor anymore. The best way to deal with that is timing the Actor
out. It's going to take time (your timeout period), but it's the best way
to do it.
On Mon, Oct 5, 2009 at 2:40 PM, David Pollak
feeder.of.the.be...@gmail.com wrote:
On Mon, Oct 5, 2009 at 10:27 AM, Jack Widman jack.wid...@gmail.comwrote:
Understood. My intention is to send a ShutDown message to the
CometActor when somebody closes the browser. I need this so that when
they
visit the page in a browser again, the CometActor is 'reset'.
First, there's no way to determine if the browser window is closed.
Second, *DO NOT* send a ShutDown message to the CometActor. This is an
internal Lift piece of housekeeping. If you do this, you will break
stuff.
Don't do it. (There is a reason the message is not private, but it
should
not be used for this purpose.)
CometActors can be named:
lift:comet type=Search name={searchString}/
You can then have a separate CometActor for each searchString.
Voila... you get what you want. Now, how do you make then CometActor go
away when it's not being used anymore?
In your CometActor:
override def lifespan: Box[TimeSpan] = Full(3 minutes)
That means if a CometActor does not appear on a page for 3 minutes,
it's removed from the session. If the named CometActor is requested
again,
a new one will be created.
On Mon, Oct 5, 2009 at 1:18 PM, marius d. marius.dan...@gmail.comwrote:
HTTP session termination does not equate with browser-close event.
Br's,
Marius
On Oct 5, 3:22 pm, Jack Widman jack.wid...@gmail.com wrote:
Yes, thats what I meant. Thanks
On Mon, Oct 5, 2009 at 4:10 AM, Timothy Perrett
timo...@getintheloop.euwrote:
But you can do it on session termination (which is what you
probably
want):
http://scala-tools.org/mvnsites-snapshots/liftweb/lift-webkit/scalado.
..
Checkout the method:
registerCleanupFunc
Cheers, Tim
On Oct 5, 8:54 am, Viktor Klang viktor.kl...@gmail.com wrote:
On Mon, Oct 5, 2009 at 6:50 AM, jack jack.wid...@gmail.com
wrote:
I would like to call a function when the browser is closed.
How do I
do this?
You cannot reliably do this.
--
Viktor Klang
Blog: klangism.blogspot.com
Twttr: viktorklang
Lift Committer - liftweb.com
AKKA Committer - akkasource.org
Cassidy - github.com/viktorklang/Cassidy.git
SoftPub founder:http://groups.google.com/group/softpub
--
Jack
--
Jack
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group
[Lift] Re: execute code when browser is closed
Good. Only thing is that if their job was to start an actor to go out and
search some pages, say, then 'stop your job' means ' 'call your 'exit'
method, no?Not trying to be a wise guy. I actually have a number of VCs
lined up to look at my app. Overall I am very glad to be using Lift. On the
Comet alone it save me a LOT of time.
Of course, I have a lot to learn.
On Mon, Oct 5, 2009 at 3:08 PM, David Pollak
feeder.of.the.be...@gmail.comwrote:
On Mon, Oct 5, 2009 at 12:06 PM, Jack Widman jack.wid...@gmail.comwrote:
Because when the users searches on a new keyword, the actors that were
processing the results for the last keyword are still processing (some of
them). But I can just send each of those a message to stop processing, no?
No problem with that, right?
Sure... send them a message that says tell all your jobs to stop. This
has nothing to do with the CometActor lifecycle. It is all your application
level stuff.
On Mon, Oct 5, 2009 at 3:02 PM, David Pollak
feeder.of.the.be...@gmail.com wrote:
On Mon, Oct 5, 2009 at 11:53 AM, Jack Widman jack.wid...@gmail.comwrote:
In my app, when the user is done searching on one keyword, they click a
link which takes them back to the main search page. Thats the time when I
wanted the CometActor to stop. Otherwise there will be too many threads
floating around and performance will suffer.
Why? Actors do not consume threads, they consume memory unless they are
actively processing a message.
On Mon, Oct 5, 2009 at 2:50 PM, David Pollak
feeder.of.the.be...@gmail.com wrote:
On Mon, Oct 5, 2009 at 11:45 AM, Jack Widman jack.wid...@gmail.comwrote:
Interesting. I will try that. And I won't send any more
ShutDownMessages :)
Though I should add that each CometActor is doing a lot of processing.
So I it would be good if I could shut one down somehow when the user
searches on a new term. Timeout won't work because there is no way to
know
how long it will take.
Maybe I could just kill all the actors directly that are doing the
processing.
That's going to be even worse. You'll kill something out from under
Lift... it's going to cause a huge pile of pain.
You can remove an Actor from the session and that will cause ShutDown
to be sent to it, but depending on how the Actor was written it's not
going
to stop processing its mailbox.
Bottom line... there's no way to tell if a user is not looking at a
page with an Actor anymore. The best way to deal with that is timing the
Actor out. It's going to take time (your timeout period), but it's the
best
way to do it.
On Mon, Oct 5, 2009 at 2:40 PM, David Pollak
feeder.of.the.be...@gmail.com wrote:
On Mon, Oct 5, 2009 at 10:27 AM, Jack Widman
jack.wid...@gmail.comwrote:
Understood. My intention is to send a ShutDown message to the
CometActor when somebody closes the browser. I need this so that when
they
visit the page in a browser again, the CometActor is 'reset'.
First, there's no way to determine if the browser window is closed.
Second, *DO NOT* send a ShutDown message to the CometActor. This is
an internal Lift piece of housekeeping. If you do this, you will break
stuff. Don't do it. (There is a reason the message is not private,
but it
should not be used for this purpose.)
CometActors can be named:
lift:comet type=Search name={searchString}/
You can then have a separate CometActor for each searchString.
Voila... you get what you want. Now, how do you make then CometActor
go
away when it's not being used anymore?
In your CometActor:
override def lifespan: Box[TimeSpan] = Full(3 minutes)
That means if a CometActor does not appear on a page for 3 minutes,
it's removed from the session. If the named CometActor is requested
again,
a new one will be created.
On Mon, Oct 5, 2009 at 1:18 PM, marius d.
marius.dan...@gmail.comwrote:
HTTP session termination does not equate with browser-close event.
Br's,
Marius
On Oct 5, 3:22 pm, Jack Widman jack.wid...@gmail.com wrote:
Yes, thats what I meant. Thanks
On Mon, Oct 5, 2009 at 4:10 AM, Timothy Perrett
timo...@getintheloop.euwrote:
But you can do it on session termination (which is what you
probably
want):
http://scala-tools.org/mvnsites-snapshots/liftweb/lift-webkit/scalado.
..
Checkout the method:
registerCleanupFunc
Cheers, Tim
On Oct 5, 8:54 am, Viktor Klang viktor.kl...@gmail.com
wrote:
On Mon, Oct 5, 2009 at 6:50 AM, jack jack.wid...@gmail.com
wrote:
I would like to call a function when the browser is closed.
How do I
do this?
You cannot reliably do this.
--
Viktor Klang
Blog: klangism.blogspot.com
Twttr: viktorklang
Lift Committer - liftweb.com
AKKA Committer - akkasource.org
Cassidy - github.com/viktorklang/Cassidy.git
SoftPub founder:http://groups.google.com/group/softpub
--
Jack
--
Jack
--
Lift, the simply
[Lift] Re: How to share request scope data among snippets in Lift
Well it is high enough level! [?]
On Mon, Oct 5, 2009 at 3:49 PM, Viktor Klang viktor.kl...@gmail.com wrote:
On Mon, Oct 5, 2009 at 6:02 PM, Jack Widman jack.wid...@gmail.com wrote:
Why don't we make Esperanto the official Lift language?
I'd say make Scala the official language ;)
On Mon, Oct 5, 2009 at 11:52 AM, marius d. marius.dan...@gmail.comwrote:
On Oct 5, 6:15 pm, David Pollak feeder.of.the.be...@gmail.com wrote:
On Sun, Oct 4, 2009 at 2:41 AM, ishiijp yoshinori.is...@gmail.com
wrote:
Thank you for your example, David.
It will work in my purpose.
Cool.
It seems that my poor English and less information let some people
confused.
I appreciate that you have put in the work to translate your thoughts
to
English. I apologize that I only speak English, but would love to
speak
Japanese, German, Russian, and a few other languages.
oh you gotta learn Romanian :)
I need just a request scope data.
It means I want to share information between snippets across a
request.
(Is the expression request scope not good for in this case...?)
request scope is exactly the right phrase.
Thank all responsed my post,
and your suggestions are informative.
I think very nice community is here.
On 9月26日, 午後10:33, David Pollak feeder.of.the.be...@gmail.com
wrote:
To share information between snippets during a request, use a
RequestVar:
object MyInfo extends RequestVar(calculate_value)
so
object MyInfo extends RequestVar[Box[Invoice]](Empty)
in one snippet, you may calculate the Invoice and put it in the
MyInfo:
MyInfo.set(Full(invoice))
In another snippet, you can extract:
for {
invoice - MyInfo.is
} yield ...
Note that the calculate_value is a call-by-name parameter, so it
will
be
invoked each time the RequestVar is uninitialized. You can place
lazy
calculation logic in here.
On Sat, Sep 26, 2009 at 12:14 AM, ishiijp
yoshinori.is...@gmail.com
wrote:
Hi.
If my lift application have some data that cost to create, and I
want
to share it among snippets, how to do in Lift?
if such data are shared inside one snippet, I may use lazy val.
But I have no nice idea to share it among different snippts.
Thanks much.
--
Lift, the simply functional web frameworkhttp://liftweb.net
Beginning Scalahttp://www.apress.com/book/view/1430219890
Follow me:http://twitter.com/dpp
Surf the harmonics
--
Lift, the simply functional web frameworkhttp://liftweb.net
Beginning Scalahttp://www.apress.com/book/view/1430219890
Follow me:http://twitter.com/dpp
Surf the harmonics
--
Jack
--
Viktor Klang
Blog: klangism.blogspot.com
Twttr: viktorklang
Lift Committer - liftweb.com
AKKA Committer - akkasource.org
Cassidy - github.com/viktorklang/Cassidy.git
SoftPub founder: http://groups.google.com/group/softpub
--
Jack
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
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http://groups.google.com/group/liftweb?hl=en
-~--~~~~--~~--~--~---
inline: 330.gif
[Lift] Re: How to share request scope data among snippets in Lift
I'm not sure English is Turing Complete. Also not sure how prominent it will be in 50 years ... :) On Mon, Oct 5, 2009 at 5:51 PM, David Pollak feeder.of.the.be...@gmail.comwrote: On Mon, Oct 5, 2009 at 9:35 AM, Timothy Perrett timo...@getintheloop.euwrote: Call me old fashioned, but good ol' English seems to be quite prevalent these days ;-) Is this the Queen's English? ;-) On 5 Oct 2009, at 17:02, Jack Widman wrote: Why don't we make Esperanto the official Lift language? -- Lift, the simply functional web framework http://liftweb.net Beginning Scala http://www.apress.com/book/view/1430219890 Follow me: http://twitter.com/dpp Surf the harmonics -- Jack --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: maven and jetty
Well it seems that mvn run-war is creating the war and overriding the one I just uploaded. How do I just run with a given war and not create the war. On Mon, Oct 5, 2009 at 10:37 PM, Ryan Stradling ryanstradl...@gmail.comwrote: Have you verified another server is not running on that port? Have you tried http://url:80/name of app Just to see if that works Sent from my iPhone On Oct 5, 2009, at 10:12 PM, jack jack.wid...@gmail.com wrote: I have been working locally for a long time and I seem to have forgotten how to deploy and run a war on Jetty! I am ftping the war to my server and putting it in the target directory. I then run mvn jetty:run-war -Djetty.port=80 and I keep getting the default app. What am I doing wrong? -- Jack --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: Help!
I meant to say jetty:run-war On Mon, Oct 5, 2009 at 10:52 PM, jack jack.wid...@gmail.com wrote: Is mvn jetty:run supposed to creat the war file? I want to upload a war file and just run it, not create another one. How do I do that? -- Jack --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: execute code when browser is closed
Sorry if this is a dumb question but in lift:comet type=Search
name={searchString}/, what is searchString? This is in an html file. I am
obviously missing something.
On Mon, Oct 5, 2009 at 2:40 PM, David Pollak
feeder.of.the.be...@gmail.comwrote:
On Mon, Oct 5, 2009 at 10:27 AM, Jack Widman jack.wid...@gmail.comwrote:
Understood. My intention is to send a ShutDown message to the CometActor
when somebody closes the browser. I need this so that when they visit the
page in a browser again, the CometActor is 'reset'.
First, there's no way to determine if the browser window is closed.
Second, *DO NOT* send a ShutDown message to the CometActor. This is an
internal Lift piece of housekeeping. If you do this, you will break stuff.
Don't do it. (There is a reason the message is not private, but it should
not be used for this purpose.)
CometActors can be named:
lift:comet type=Search name={searchString}/
You can then have a separate CometActor for each searchString. Voila...
you get what you want. Now, how do you make then CometActor go away when
it's not being used anymore?
In your CometActor:
override def lifespan: Box[TimeSpan] = Full(3 minutes)
That means if a CometActor does not appear on a page for 3 minutes, it's
removed from the session. If the named CometActor is requested again, a new
one will be created.
On Mon, Oct 5, 2009 at 1:18 PM, marius d. marius.dan...@gmail.comwrote:
HTTP session termination does not equate with browser-close event.
Br's,
Marius
On Oct 5, 3:22 pm, Jack Widman jack.wid...@gmail.com wrote:
Yes, thats what I meant. Thanks
On Mon, Oct 5, 2009 at 4:10 AM, Timothy Perrett
timo...@getintheloop.euwrote:
But you can do it on session termination (which is what you probably
want):
http://scala-tools.org/mvnsites-snapshots/liftweb/lift-webkit/scalado...
Checkout the method:
registerCleanupFunc
Cheers, Tim
On Oct 5, 8:54 am, Viktor Klang viktor.kl...@gmail.com wrote:
On Mon, Oct 5, 2009 at 6:50 AM, jack jack.wid...@gmail.com
wrote:
I would like to call a function when the browser is closed. How
do I
do this?
You cannot reliably do this.
--
Viktor Klang
Blog: klangism.blogspot.com
Twttr: viktorklang
Lift Committer - liftweb.com
AKKA Committer - akkasource.org
Cassidy - github.com/viktorklang/Cassidy.git
SoftPub founder:http://groups.google.com/group/softpub
--
Jack
--
Jack
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Surf the harmonics
--
Jack
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[Lift] Re: execute code when browser is closed
So I am using a snippet like this
def go:NodeSeq = {
var term:String = S.param(term).openOr()
lift:surround with=default at=content
lift:comet type=JoopComet name={term}
auth:joop/auth:joop
/lift:comet
/lift:surround
}
And the term is indeed different each time. But I am still getting the same
results from two different browsers with different terms.
On Tue, Oct 6, 2009 at 12:18 AM, Naftoli Gugenheim naftoli...@gmail.comwrote:
You are correct that Comet is a way to update information after the page is
loaded. I think there's a simpler way using ajax, but I haven't explored
those areas of Lift yet. But meanwhile you need to have the xml specifying
the comet actor be dynamic. So you need to have that xml be generated by a
snippet. A snippet is an XML to XML function.
-
jackjack.wid...@gmail.com wrote:
Let me start again. Maybe I am misunderstanding when Comet should be
used. In my application, people search for web pages. I do a lot of
processing for each resulting page. First I just display the links and
then as the processing is finished, the links on the page are
automatically modified with the data I just found for each link. This
is all working fine.
But, the session is being shared among all users so if I make one
search in one browser, and then make another search from another
browser, I get the results from the first browser.
David suggested I name each CometActor differently. That is not
working, though maybe I am not doing it right.
On Oct 6, 12:01 am, Naftoli Gugenheim naftoli...@gmail.com wrote:
What do you mean?
-
jackjack.wid...@gmail.com wrote:
i guess you meant put the snippet right in the CometActor. Ok. Now I'm
getting it.
On Oct 5, 11:46 pm, Jack Widman jack.wid...@gmail.com wrote:
Sorry if this is a dumb question but in lift:comet type=Search
name={searchString}/, what is searchString? This is in an html file. I
am
obviously missing something.
On Mon, Oct 5, 2009 at 2:40 PM, David Pollak
feeder.of.the.be...@gmail.comwrote:
On Mon, Oct 5, 2009 at 10:27 AM, Jack Widman jack.wid...@gmail.com
wrote:
Understood. My intention is to send a ShutDown message to the
CometActor
when somebody closes the browser. I need this so that when they
visit the
page in a browser again, the CometActor is 'reset'.
First, there's no way to determine if the browser window is closed.
Second, *DO NOT* send a ShutDown message to the CometActor. This is
an
internal Lift piece of housekeeping. If you do this, you will break
stuff.
Don't do it. (There is a reason the message is not private, but it
should
not be used for this purpose.)
CometActors can be named:
lift:comet type=Search name={searchString}/
You can then have a separate CometActor for each searchString.
Voila...
you get what you want. Now, how do you make then CometActor go away
when
it's not being used anymore?
In your CometActor:
override def lifespan: Box[TimeSpan] = Full(3 minutes)
That means if a CometActor does not appear on a page for 3 minutes,
it's
removed from the session. If the named CometActor is requested
again, a new
one will be created.
On Mon, Oct 5, 2009 at 1:18 PM, marius d. marius.dan...@gmail.com
wrote:
HTTP session termination does not equate with browser-close event.
Br's,
Marius
On Oct 5, 3:22 pm, Jack Widman jack.wid...@gmail.com wrote:
Yes, thats what I meant. Thanks
On Mon, Oct 5, 2009 at 4:10 AM, Timothy Perrett
timo...@getintheloop.euwrote:
But you can do it on session termination (which is what you
probably
want):
http://scala-tools.org/mvnsites-snapshots/liftweb/lift-webkit/scalado...
Checkout the method:
registerCleanupFunc
Cheers, Tim
On Oct 5, 8:54 am, Viktor Klang viktor.kl...@gmail.com
wrote:
On Mon, Oct 5, 2009 at 6:50 AM, jack jack.wid...@gmail.com
wrote:
I would like to call a function when the browser is closed.
How
do I
do this?
You cannot reliably do this.
--
Viktor Klang
Blog: klangism.blogspot.com
Twttr: viktorklang
Lift Committer - liftweb.com
AKKA Committer - akkasource.org
Cassidy - github.com/viktorklang/Cassidy.git
SoftPub founder:http://groups.google.com/group/softpub
--
Jack
--
Jack
--
Lift, the simply functional web frameworkhttp://liftweb.net
Beginning Scalahttp://www.apress.com/book/view/1430219890
Follow me:http://twitter.com/dpp
Surf the harmonics
--
Jack
--
Jack
--~--~-~--~~~---~--~~
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[Lift] Re: a very simple question
Well my app is a search application. You search for certain web pages and I
do some processing after the results are displayed. Thats why I am using
Comet. Certain information is added to each result link.
I want the user to be able to either hit the back button or click on alink
that goes to the search page again. When they enter a search term and click
submit, I want to load the CometActor class again.
Do you think sending a ShutDown message will accomplish this?
After the session is killed, how do I get the CometActor to automatically
load again. Do I send the message and then redirect to the page?
I am just not comfortable yet with the mechanics of how Lift handles comet.
Thanks in advance.
Jack
On Sun, Oct 4, 2009 at 6:50 PM, Timothy Perrett timo...@getintheloop.euwrote:
If memory serves, the comet actor lives on in the session scope until
its either sent the ShutDown message explicitly, or it times out (you
can set the timeout).
Does that help?
Cheers, Tim
On 4 Oct 2009, at 23:17, jack wrote:
I put the line
println(dude)
in a Comet class write under the class declaration.
i.e.
class JoopComet extends CometActor with CometListenee {
println(INSIDE COMET CLASS)
When the class runs and all the activity is complete, I hit the back
button and that loads the JoopComet class again.
But I do not see dude printed.
Why not?
--
Jack
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[Lift] Re: CometActor timeout problem
Thanks Atsuhiko very much. I really appreciate your effort and this helps alot. Jack On Thu, Oct 1, 2009 at 4:11 AM, Atsuhiko Yamanaka atsuhiko.yaman...@gmail.com wrote: Hi, On Thu, Oct 1, 2009 at 1:11 PM, Jack Widman jack.wid...@gmail.com wrote: David, I have attached a (non) working example. It compiles and runs and does a part of what I want it to do but not completely. It first displays a couple of links and the link body for both links is just 0. It then spawns a couple of threads each of which generates a random number and then puts two Page objects on a PageQueue. The comet page is supposed to reRender the screen whenever a new page object is added to the Queue. Before it does this it calls a method called insertRandomNumber which changes the zero to some random value. There is not much code and i think its pretty self-explanatory. The html page is test.html. I really do appreciate your help and understand if you can't go through the whole thing. Frankly to say, I could not understand the internal logic, and it seems it has be broken, but attached modified src.zip will work as the demonstration of CometActor at least. * JoopComet implements CometListenee * TSGetterLauncer has been rewritten, and will start TSGetters in every 3 seconds. The previous version has really short life. * TSCatcher implements ListenerManager. * url links on the web page will be updated in every 3 seconds. Sincerely, -- Atsuhiko Yamanaka JCraft,Inc. 1-14-20 HONCHO AOBA-KU, SENDAI, MIYAGI 980-0014 Japan. Tel +81-22-723-2150 +1-415-578-3454 Skype callto://jcraft/ --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: CometActor timeout problem
Atsuhiko, How would I make one small change? I would like each link to refresh only once and I would like that to happen as soon as the TSCatcher objects catch a package. Thanks in advance. Jack On Thu, Oct 1, 2009 at 4:11 AM, Atsuhiko Yamanaka atsuhiko.yaman...@gmail.com wrote: Hi, On Thu, Oct 1, 2009 at 1:11 PM, Jack Widman jack.wid...@gmail.com wrote: David, I have attached a (non) working example. It compiles and runs and does a part of what I want it to do but not completely. It first displays a couple of links and the link body for both links is just 0. It then spawns a couple of threads each of which generates a random number and then puts two Page objects on a PageQueue. The comet page is supposed to reRender the screen whenever a new page object is added to the Queue. Before it does this it calls a method called insertRandomNumber which changes the zero to some random value. There is not much code and i think its pretty self-explanatory. The html page is test.html. I really do appreciate your help and understand if you can't go through the whole thing. Frankly to say, I could not understand the internal logic, and it seems it has be broken, but attached modified src.zip will work as the demonstration of CometActor at least. * JoopComet implements CometListenee * TSGetterLauncer has been rewritten, and will start TSGetters in every 3 seconds. The previous version has really short life. * TSCatcher implements ListenerManager. * url links on the web page will be updated in every 3 seconds. Sincerely, -- Atsuhiko Yamanaka JCraft,Inc. 1-14-20 HONCHO AOBA-KU, SENDAI, MIYAGI 980-0014 Japan. Tel +81-22-723-2150 +1-415-578-3454 Skype callto://jcraft/ --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: CometActor timeout problem
Thanks so much Atsuhiko. You are very kind. On Thu, Oct 1, 2009 at 11:01 AM, Atsuhiko Yamanaka atsuhiko.yaman...@gmail.com wrote: Hi, On Thu, Oct 1, 2009 at 9:42 PM, Jack Widman jack.wid...@gmail.com wrote: Atsuhiko, How would I make one small change? I would like each link to refresh only once and I would like that to happen as soon as the TSCatcher objects catch a package. Thanks in advance. How about the attached src.zip? It will refresh each links only once. A package will be sent from JoopComet#localSetup and that method will be invoked only once during the life of JoopComet. This means that even if you leave test.html page and re-vist there, that method will not be invoked again. Sincerely, -- Atsuhiko Yamanaka JCraft,Inc. 1-14-20 HONCHO AOBA-KU, SENDAI, MIYAGI 980-0014 Japan. Tel +81-22-723-2150 +1-415-578-3454 Skype callto://jcraft --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: CometActor timeout problem
Yes, the page never gets rendered. I am actually using Actors. I will post a code example tonight. Thanks for your response. On Fri, Sep 18, 2009 at 12:09 PM, marius d. marius.dan...@gmail.com wrote: On Sep 17, 11:09 pm, jack jack.wid...@gmail.com wrote: I have a CometActor which displays a list of urls and at the same time launches a bunch of threads each of which gets information about the urls and then puts messages about that information in a Queue. On each new tick, the CometActor checks the queue and updates its urls. The problem is that I am launching the threads from the CometActor and the page is never coming back. It times out. So the page never gets rendered? I would recommend using actors and not really threads but even with threads it shouldn't impact you. But it also depends on what your code does. Can you post a minimalistic example? Is there some general principle about launching threads from a CometActor that might explain this behavior? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: trouble with comet Clock example
The package is correct. Here is the error XML parsing failed: syntax error (Line: 13, Character: 4) Reparse document as HTML Error:undeclared XML namespace prefix used in attribute name Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared 10: body 11: 12: !--FIXME - comet type: Full(com.authoritude.snippet.Clock) name: Full(Other) Not Found -- 13: clk:timeMissing Clock/clk:time 14: 15: 16: script type=text/javascript I tried it both with the full class name and just Clock. I get the same error in both cases. Its seems to be saying clk is an undeclared namespace? On Tue, Sep 15, 2009 at 4:46 AM, Timothy Perrett timo...@getintheloop.euwrote: Its telling you that the class Clock could not be found - if i were you, check the package definitions on the clock class to make sure its in the right namespace. Cheers, Tim On Sep 15, 3:38 am, jack jack.wid...@gmail.com wrote: I compiled the comet Clock app and used the following markup lift:surround with=default at=content lift:comet type=Clock name=Other clk:timeMissing Clock/clk:time /lift:comet /lift:surround I also used the standard default.html When I ran it, I got the error XML parsing failed: syntax error (Line: 13, Character: 4) Error:undeclared XML namespace prefix used in attribute name Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared 10: body 11: 12: !--FIXME - comet type: Full(Clock) name: Full(Other) Not Found -- 13: clk:timeMissing Clock/clk:time 14: 15: 16: script type=text/javascript Any ideas? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: trouble with comet Clock example
Here is the complete code for my Clock example
*class*
import scala.xml._
import net.liftweb.http.S
import net.liftweb.http.CometActor
import net.liftweb.http.SessionVar
import net.liftweb.util._
import _root_.scala.xml._
import _root_.net.liftweb.util.Helpers._
import scala.actors._
class Clock extends CometActor {
override def defaultPrefix = Full(clk)
def render = bind(time - timeSpan)
def timeSpan = (span id=time{timeNow}/span)
ActorPing.schedule(this, Tick, 1L)
override def lowPriority :
PartialFunction[Any, Unit] = {
case Tick = {
partialUpdate(SetHtml(time,
Text(timeNow.toString)))
ActorPing.schedule(this,Tick, 1L)
}
}
}
case object Tick
*markup - (I have also tried it with just *type=Clock since the package is
in my Boot class)
lift:surround with=default at=content
lift:comet type=com.authoritude.snippet.Clock name=Other
clk:timeMissing Clock/clk:time
/lift:comet
/lift:surround
On Tue, Sep 15, 2009 at 8:25 AM, Jack Widman jack.wid...@gmail.com wrote:
The package is correct. Here is the error
XML parsing failed: syntax error (Line: 13, Character: 4)
Reparse document as HTML
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(com.authoritude.snippet.Clock) name:
Full(Other) Not Found --
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
I tried it both with the full class name and just Clock. I get the same
error in both cases.
Its seems to be saying clk is an undeclared namespace?
On Tue, Sep 15, 2009 at 4:46 AM, Timothy Perrett
timo...@getintheloop.euwrote:
Its telling you that the class Clock could not be found - if i were
you, check the package definitions on the clock class to make sure its
in the right namespace.
Cheers, Tim
On Sep 15, 3:38 am, jack jack.wid...@gmail.com wrote:
I compiled the comet Clock app and used the following markup
lift:surround with=default at=content
lift:comet type=Clock name=Other
clk:timeMissing Clock/clk:time
/lift:comet
/lift:surround
I also used the standard default.html
When I ran it, I got the error
XML parsing failed: syntax error (Line: 13, Character: 4)
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(Clock) name: Full(Other) Not Found
--
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
Any ideas?
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[Lift] Re: trouble with comet Clock example
And here is the error again:
Error!
XML parsing failed
XML parsing failed: syntax error (Line: 13, Character: 4)
Reparse document as HTML
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(com.authoritude.snippet.Clock) name:
Full(Other) Not Found --
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
On Tue, Sep 15, 2009 at 8:32 AM, Jack Widman jack.wid...@gmail.com wrote:
Here is the complete code for my Clock example
*class*
import scala.xml._
import net.liftweb.http.S
import net.liftweb.http.CometActor
import net.liftweb.http.SessionVar
import net.liftweb.util._
import _root_.scala.xml._
import _root_.net.liftweb.util.Helpers._
import scala.actors._
class Clock extends CometActor {
override def defaultPrefix = Full(clk)
def render = bind(time - timeSpan)
def timeSpan = (span id=time{timeNow}/span)
ActorPing.schedule(this, Tick, 1L)
override def lowPriority :
PartialFunction[Any, Unit] = {
case Tick = {
partialUpdate(SetHtml(time,
Text(timeNow.toString)))
ActorPing.schedule(this,Tick, 1L)
}
}
}
case object Tick
*markup - (I have also tried it with just *type=Clock since the package
is in my Boot class)
lift:surround with=default at=content
lift:comet type=com.authoritude.snippet.Clock name=Other
clk:timeMissing Clock/clk:time
/lift:comet
/lift:surround
On Tue, Sep 15, 2009 at 8:25 AM, Jack Widman jack.wid...@gmail.comwrote:
The package is correct. Here is the error
XML parsing failed: syntax error (Line: 13, Character: 4)
Reparse document as HTML
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(com.authoritude.snippet.Clock) name:
Full(Other) Not Found --
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
I tried it both with the full class name and just Clock. I get the same
error in both cases.
Its seems to be saying clk is an undeclared namespace?
On Tue, Sep 15, 2009 at 4:46 AM, Timothy Perrett timo...@getintheloop.eu
wrote:
Its telling you that the class Clock could not be found - if i were
you, check the package definitions on the clock class to make sure its
in the right namespace.
Cheers, Tim
On Sep 15, 3:38 am, jack jack.wid...@gmail.com wrote:
I compiled the comet Clock app and used the following markup
lift:surround with=default at=content
lift:comet type=Clock name=Other
clk:timeMissing Clock/clk:time
/lift:comet
/lift:surround
I also used the standard default.html
When I ran it, I got the error
XML parsing failed: syntax error (Line: 13, Character: 4)
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(Clock) name: Full(Other) Not Found
--
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
Any ideas?
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[Lift] Re: trouble with comet Clock example
Yikes. Feeling stupid.
On Tue, Sep 15, 2009 at 9:02 AM, Tim Nelson tnell...@gmail.com wrote:
Comet classes are supposed to go in the comet folder. It looks like you
have it in your snippet folder. Did you try putting the clock class in the
comet folder?
On Tue, Sep 15, 2009 at 7:34 AM, Jack Widman jack.wid...@gmail.comwrote:
And here is the error again:
Error!
XML parsing failed
XML parsing failed: syntax error (Line: 13, Character: 4)
Reparse document as HTML
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(com.authoritude.snippet.Clock) name:
Full(Other) Not Found --
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
On Tue, Sep 15, 2009 at 8:32 AM, Jack Widman jack.wid...@gmail.comwrote:
Here is the complete code for my Clock example
*class*
import scala.xml._
import net.liftweb.http.S
import net.liftweb.http.CometActor
import net.liftweb.http.SessionVar
import net.liftweb.util._
import _root_.scala.xml._
import _root_.net.liftweb.util.Helpers._
import scala.actors._
class Clock extends CometActor {
override def defaultPrefix = Full(clk)
def render = bind(time - timeSpan)
def timeSpan = (span id=time{timeNow}/span)
ActorPing.schedule(this, Tick, 1L)
override def lowPriority :
PartialFunction[Any, Unit] = {
case Tick = {
partialUpdate(SetHtml(time,
Text(timeNow.toString)))
ActorPing.schedule(this,Tick, 1L)
}
}
}
case object Tick
*markup - (I have also tried it with just *type=Clock since the
package is in my Boot class)
lift:surround with=default at=content
lift:comet type=com.authoritude.snippet.Clock name=Other
clk:timeMissing Clock/clk:time
/lift:comet
/lift:surround
On Tue, Sep 15, 2009 at 8:25 AM, Jack Widman jack.wid...@gmail.comwrote:
The package is correct. Here is the error
XML parsing failed: syntax error (Line: 13, Character: 4)
Reparse document as HTML
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(com.authoritude.snippet.Clock) name:
Full(Other) Not Found --
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
I tried it both with the full class name and just Clock. I get the same
error in both cases.
Its seems to be saying clk is an undeclared namespace?
On Tue, Sep 15, 2009 at 4:46 AM, Timothy Perrett
timo...@getintheloop.eu wrote:
Its telling you that the class Clock could not be found - if i were
you, check the package definitions on the clock class to make sure its
in the right namespace.
Cheers, Tim
On Sep 15, 3:38 am, jack jack.wid...@gmail.com wrote:
I compiled the comet Clock app and used the following markup
lift:surround with=default at=content
lift:comet type=Clock name=Other
clk:timeMissing Clock/clk:time
/lift:comet
/lift:surround
I also used the standard default.html
When I ran it, I got the error
XML parsing failed: syntax error (Line: 13, Character: 4)
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(Clock) name: Full(Other) Not
Found
--
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
Any ideas?
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To post to this group, send email to liftweb@googlegroups.com
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[Lift] Re: trouble with comet Clock example
I did not try it without the package statement. The class is located in the
snippet folder. It was just pointed out to me that it must be in the comet
folder.
On Tue, Sep 15, 2009 at 10:15 AM, Naftoli Gugenheim naftoli...@gmail.comwrote:
Did you leave out the package statement? Where is the .class file
outputted?
I think the browser is complaining that the error message xml has an
unbound prefix.
-
Jack Widmanjack.wid...@gmail.com wrote:
And here is the error again:
Error!
XML parsing failed
XML parsing failed: syntax error (Line: 13, Character: 4)
Reparse document as HTML
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(com.authoritude.snippet.Clock) name:
Full(Other) Not Found --
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
On Tue, Sep 15, 2009 at 8:32 AM, Jack Widman jack.wid...@gmail.com
wrote:
Here is the complete code for my Clock example
*class*
import scala.xml._
import net.liftweb.http.S
import net.liftweb.http.CometActor
import net.liftweb.http.SessionVar
import net.liftweb.util._
import _root_.scala.xml._
import _root_.net.liftweb.util.Helpers._
import scala.actors._
class Clock extends CometActor {
override def defaultPrefix = Full(clk)
def render = bind(time - timeSpan)
def timeSpan = (span id=time{timeNow}/span)
ActorPing.schedule(this, Tick, 1L)
override def lowPriority :
PartialFunction[Any, Unit] = {
case Tick = {
partialUpdate(SetHtml(time,
Text(timeNow.toString)))
ActorPing.schedule(this,Tick, 1L)
}
}
}
case object Tick
*markup - (I have also tried it with just *type=Clock since the package
is in my Boot class)
lift:surround with=default at=content
lift:comet type=com.authoritude.snippet.Clock name=Other
clk:timeMissing Clock/clk:time
/lift:comet
/lift:surround
On Tue, Sep 15, 2009 at 8:25 AM, Jack Widman jack.wid...@gmail.com
wrote:
The package is correct. Here is the error
XML parsing failed: syntax error (Line: 13, Character: 4)
Reparse document as HTML
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(com.authoritude.snippet.Clock) name:
Full(Other) Not Found --
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
I tried it both with the full class name and just Clock. I get the same
error in both cases.
Its seems to be saying clk is an undeclared namespace?
On Tue, Sep 15, 2009 at 4:46 AM, Timothy Perrett
timo...@getintheloop.eu
wrote:
Its telling you that the class Clock could not be found - if i were
you, check the package definitions on the clock class to make sure its
in the right namespace.
Cheers, Tim
On Sep 15, 3:38 am, jack jack.wid...@gmail.com wrote:
I compiled the comet Clock app and used the following markup
lift:surround with=default at=content
lift:comet type=Clock name=Other
clk:timeMissing Clock/clk:time
/lift:comet
/lift:surround
I also used the standard default.html
When I ran it, I got the error
XML parsing failed: syntax error (Line: 13, Character: 4)
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(Clock) name: Full(Other) Not
Found
--
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
Any ideas?
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
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[Lift] Re: trouble with comet Clock example
I double checked it. The full package was there, I just failed to include it
in the email.
On Tue, Sep 15, 2009 at 11:12 AM, Naftoli Gugenheim naftoli...@gmail.comwrote:
I asked because the package statement didn't seem to get pasted into your
email with the rest of your code, and I've had times that I tracked down
errors to an incorrect package statement. In Java, if a package statement
doesn't correspond to a file's containing folder it's an error, but in Scala
it just compiles into a different package/output folder.
-
Jack Widmanjack.wid...@gmail.com wrote:
I did not try it without the package statement. The class is located in the
snippet folder. It was just pointed out to me that it must be in the comet
folder.
On Tue, Sep 15, 2009 at 10:15 AM, Naftoli Gugenheim naftoli...@gmail.com
wrote:
Did you leave out the package statement? Where is the .class file
outputted?
I think the browser is complaining that the error message xml has an
unbound prefix.
-
Jack Widmanjack.wid...@gmail.com wrote:
And here is the error again:
Error!
XML parsing failed
XML parsing failed: syntax error (Line: 13, Character: 4)
Reparse document as HTML
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(com.authoritude.snippet.Clock) name:
Full(Other) Not Found --
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
On Tue, Sep 15, 2009 at 8:32 AM, Jack Widman jack.wid...@gmail.com
wrote:
Here is the complete code for my Clock example
*class*
import scala.xml._
import net.liftweb.http.S
import net.liftweb.http.CometActor
import net.liftweb.http.SessionVar
import net.liftweb.util._
import _root_.scala.xml._
import _root_.net.liftweb.util.Helpers._
import scala.actors._
class Clock extends CometActor {
override def defaultPrefix = Full(clk)
def render = bind(time - timeSpan)
def timeSpan = (span id=time{timeNow}/span)
ActorPing.schedule(this, Tick, 1L)
override def lowPriority :
PartialFunction[Any, Unit] = {
case Tick = {
partialUpdate(SetHtml(time,
Text(timeNow.toString)))
ActorPing.schedule(this,Tick, 1L)
}
}
}
case object Tick
*markup - (I have also tried it with just *type=Clock since the
package
is in my Boot class)
lift:surround with=default at=content
lift:comet type=com.authoritude.snippet.Clock name=Other
clk:timeMissing Clock/clk:time
/lift:comet
/lift:surround
On Tue, Sep 15, 2009 at 8:25 AM, Jack Widman jack.wid...@gmail.com
wrote:
The package is correct. Here is the error
XML parsing failed: syntax error (Line: 13, Character: 4)
Reparse document as HTML
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(com.authoritude.snippet.Clock)
name:
Full(Other) Not Found --
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
I tried it both with the full class name and just Clock. I get the
same
error in both cases.
Its seems to be saying clk is an undeclared namespace?
On Tue, Sep 15, 2009 at 4:46 AM, Timothy Perrett
timo...@getintheloop.eu
wrote:
Its telling you that the class Clock could not be found - if i were
you, check the package definitions on the clock class to make sure
its
in the right namespace.
Cheers, Tim
On Sep 15, 3:38 am, jack jack.wid...@gmail.com wrote:
I compiled the comet Clock app and used the following markup
lift:surround with=default at=content
lift:comet type=Clock name=Other
clk:timeMissing Clock/clk:time
/lift:comet
/lift:surround
I also used the standard default.html
When I ran it, I got the error
XML parsing failed: syntax error (Line: 13, Character: 4)
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(Clock) name: Full(Other) Not
Found
--
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
Any ideas?
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com
[Lift] Re: trouble with comet Clock example
Ok Great. I will try this first thing when I get home tonight.
On Tue, Sep 15, 2009 at 11:05 AM, David Pollak
feeder.of.the.be...@gmail.com wrote:
On Tue, Sep 15, 2009 at 7:18 AM, Jack Widman jack.wid...@gmail.comwrote:
I did not try it without the package statement. The class is located in
the snippet folder. It was just pointed out to me that it must be in the
comet folder.
Actually, it doesn't matter what folder it's in, but the package my be
specified correctly or Lift won't know how to find the code.
In your code above, there is no package declaration, so the code is not
going to have any package.
Please take the package line from your snippet file, copy it into your
Clock file and change snippet to comet and it should work.
On Tue, Sep 15, 2009 at 10:15 AM, Naftoli Gugenheim naftoli...@gmail.com
wrote:
Did you leave out the package statement? Where is the .class file
outputted?
I think the browser is complaining that the error message xml has an
unbound prefix.
-
Jack Widmanjack.wid...@gmail.com wrote:
And here is the error again:
Error!
XML parsing failed
XML parsing failed: syntax error (Line: 13, Character: 4)
Reparse document as HTML
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(com.authoritude.snippet.Clock) name:
Full(Other) Not Found --
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
On Tue, Sep 15, 2009 at 8:32 AM, Jack Widman jack.wid...@gmail.com
wrote:
Here is the complete code for my Clock example
*class*
import scala.xml._
import net.liftweb.http.S
import net.liftweb.http.CometActor
import net.liftweb.http.SessionVar
import net.liftweb.util._
import _root_.scala.xml._
import _root_.net.liftweb.util.Helpers._
import scala.actors._
class Clock extends CometActor {
override def defaultPrefix = Full(clk)
def render = bind(time - timeSpan)
def timeSpan = (span id=time{timeNow}/span)
ActorPing.schedule(this, Tick, 1L)
override def lowPriority :
PartialFunction[Any, Unit] = {
case Tick = {
partialUpdate(SetHtml(time,
Text(timeNow.toString)))
ActorPing.schedule(this,Tick, 1L)
}
}
}
case object Tick
*markup - (I have also tried it with just *type=Clock since the
package
is in my Boot class)
lift:surround with=default at=content
lift:comet type=com.authoritude.snippet.Clock name=Other
clk:timeMissing Clock/clk:time
/lift:comet
/lift:surround
On Tue, Sep 15, 2009 at 8:25 AM, Jack Widman jack.wid...@gmail.com
wrote:
The package is correct. Here is the error
XML parsing failed: syntax error (Line: 13, Character: 4)
Reparse document as HTML
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(com.authoritude.snippet.Clock)
name:
Full(Other) Not Found --
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
I tried it both with the full class name and just Clock. I get the
same
error in both cases.
Its seems to be saying clk is an undeclared namespace?
On Tue, Sep 15, 2009 at 4:46 AM, Timothy Perrett
timo...@getintheloop.eu
wrote:
Its telling you that the class Clock could not be found - if i were
you, check the package definitions on the clock class to make sure
its
in the right namespace.
Cheers, Tim
On Sep 15, 3:38 am, jack jack.wid...@gmail.com wrote:
I compiled the comet Clock app and used the following markup
lift:surround with=default at=content
lift:comet type=Clock name=Other
clk:timeMissing Clock/clk:time
/lift:comet
/lift:surround
I also used the standard default.html
When I ran it, I got the error
XML parsing failed: syntax error (Line: 13, Character: 4)
Error:undeclared XML namespace prefix used in attribute name
Specification:http://www.w3.org/TR/xml-names11/#nsc-NSDeclared
10: body
11:
12: !--FIXME - comet type: Full(Clock) name: Full(Other) Not
Found
--
13: clk:timeMissing Clock/clk:time
14:
15:
16: script type=text/javascript
Any ideas?
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp
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To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
For more options, visit
[Lift] Re: Ajax example from the book
Thanks. Yes thats what I meant.
On Mon, Sep 14, 2009 at 3:42 PM, Derek Chen-Becker dchenbec...@gmail.comwrote:
I think that he's referring to the SetHtml, which is actually a JsExp that
has to be returned from any Ajax functions (the javascript is returned to
the client and executed). In the case of the example code, it will set the
contents of the div with the id my-div to a single Text element of That's
it.
Derek
On Mon, Sep 14, 2009 at 7:52 AM, Daniel Nelson dpn53...@gmail.com wrote:
If you're referring to the Exploring Lift book, have a look at Section
3.11.1 Binding Values in Snippets where it explains bind. (I'm new
to Lift myself and hopefully not leading you astray.)
1. myFunc's html parameter is fed automatically by the HTML Lift
Template. In the follow example, everything between
lift:SomeClass.myFunc and /lift:SomeClass.myFunc is passed to
myFunc.
lift:surround with=default at=content
h2Hello World/h2
lift:SomeClass.myFunc form=POST
p Some Text hello:description //p
hello:button /
/lift:SomeClass.myFunc
/lift:surround
2. hello is a prefix for referring to template elements by name. The
HTML Lift template should have some like hello:button / which will
get replaced by the evaluation after - within bind().
3. I'm not sure what you mean How does the div work.
On Sep 13, 10:24 pm, jack jack.wid...@gmail.com wrote:
Could somebody please explain to me how this example from the book
works.
def myFunc(html:NodeSeq):NodeSeq = {
bind(hello,html,button -
ajaxButton(Text(Press me),
{ () =
println(Got an Ajax call.)
SetHtml(my-div, Text(That's it))
})
)
}
In particular, what do I pass in as the html parameter?
What is 'hello'?
How does the div work?
I don't understand 'bind'.
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To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
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[Lift] Re: Ajax example from the book
I was referring to that book. Is there another? :)
Thanks for your help Daniel.
On Mon, Sep 14, 2009 at 9:52 AM, Daniel Nelson dpn53...@gmail.com wrote:
If you're referring to the Exploring Lift book, have a look at Section
3.11.1 Binding Values in Snippets where it explains bind. (I'm new
to Lift myself and hopefully not leading you astray.)
1. myFunc's html parameter is fed automatically by the HTML Lift
Template. In the follow example, everything between
lift:SomeClass.myFunc and /lift:SomeClass.myFunc is passed to
myFunc.
lift:surround with=default at=content
h2Hello World/h2
lift:SomeClass.myFunc form=POST
p Some Text hello:description //p
hello:button /
/lift:SomeClass.myFunc
/lift:surround
2. hello is a prefix for referring to template elements by name. The
HTML Lift template should have some like hello:button / which will
get replaced by the evaluation after - within bind().
3. I'm not sure what you mean How does the div work.
On Sep 13, 10:24 pm, jack jack.wid...@gmail.com wrote:
Could somebody please explain to me how this example from the book
works.
def myFunc(html:NodeSeq):NodeSeq = {
bind(hello,html,button -
ajaxButton(Text(Press me),
{ () =
println(Got an Ajax call.)
SetHtml(my-div, Text(That's it))
})
)
}
In particular, what do I pass in as the html parameter?
What is 'hello'?
How does the div work?
I don't understand 'bind'.
--~--~-~--~~~---~--~~
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Lift group.
To post to this group, send email to liftweb@googlegroups.com
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-~--~~~~--~~--~--~---
[Lift] Re: what the difference between :: and :::
:: is cons. It adds an element to a list. ::: concatentates two lists. On Wed, Sep 9, 2009 at 11:15 PM, surfman chinasmile...@gmail.com wrote: I am confused by :: and :::，it seems they are doing concatenation job. but what they differ from each other? Thanks. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: setting user-agent header with Databinder
Right. I will try to keep to the topic :)
I actually found him and he quickly answered me.
On Tue, Sep 8, 2009 at 12:24 PM, David Pollak feeder.of.the.be...@gmail.com
wrote:
Jack,
I'm not sure where N8han (the author of Databinder) hangs out, but it's not
on the Lift list. :-(
Sorry.
David
On Tue, Sep 8, 2009 at 8:58 AM, jack jack.wid...@gmail.com wrote:
Please forgive me for including so much code but I have an important
demo fast approaching and I'm kind of in a bind. I am using
Databinders Dispatch http library which is a wrapper around Javas
HttpClient library. I have included the Http class below. Does anyone
see how to set the user-agent header. Once again I apologize and would
be much obliged for any help.
import collection.Map
import collection.immutable.{Map = IMap}
import util.DynamicVariable
import java.io.
{InputStream,OutputStream,BufferedInputStream,BufferedOutputStream}
import java.net.URI
import java.util.zip.GZIPInputStream
import org.apache.http._
import org.apache.http.client._
import org.apache.http.impl.client.{DefaultHttpClient,
BasicCredentialsProvider}
import org.apache.http.client.methods._
import org.apache.http.client.entity.UrlEncodedFormEntity
import org.apache.http.client.utils.URLEncodedUtils
import org.apache.http.entity.StringEntity
import org.apache.http.message.BasicNameValuePair
import org.apache.http.protocol.HTTP.UTF_8
import org.apache.http.params.{HttpProtocolParams, BasicHttpParams}
import org.apache.http.util.EntityUtils
import org.apache.http.auth.{AuthScope, UsernamePasswordCredentials,
Credentials}
case class StatusCode(code: Int, contents:String)
extends Exception(Exceptional resoponse code: + code + \n +
contents)
/** Http access point. Standard instances to be used by a single
thread. */
class Http {
val credentials = new DynamicVariable[Option[(AuthScope,
Credentials)]](None)
val client = new ConfiguredHttpClient
def credentialsProvider = new BasicCredentialsProvider {
override def getCredentials(scope: AuthScope) = null
}
/** /** Info Logger for this instance, default returns Connfiggy if
on classpath else console logger. */
lazy val log: Logger = try {
new Logger {
val delegate = net.lag.logging.Logger.get
def info(msg: String, items: Any*) { delegate.info(msg, items:
_*) }
}
} catch {
case e: NoClassDefFoundError = new Logger {
def info(msg: String, items: Any*) {
println(INF: [console logger] dispatch: + msg.format(items:
_*))
}
}
}
**/
/** Execute method for the given host, with logging. */
def execute(host: HttpHost, req: HttpUriRequest) = {
//log.info(%s %s%s, req.getMethod, host, req.getURI)
client.execute(host, req)
}
/** Execute for given optional parametrs, with logging. Creates
local scope for credentials. */
val execute: (Option[HttpHost], Option[Credentials], HttpUriRequest)
= HttpResponse = {
case (Some(host), Some(creds), req) =
client.credentials.withValue(Some((new AuthScope
(host.getHostName, host.getPort), creds)))(execute(host, req))
case (None, Some(creds), _) = error(Credentials specified
without explicit host)
case (Some(host), _, req) = execute(host, req)
case (_, _, req) =
//log.info(%s %s, req.getMethod, req.getURI)
client.execute(req)
}
/** Execute full request-response handler. */
def x[T](hand: Handler[T]): T = x(hand.request)(hand.block)
/** Execute request and handle response codes, response, and entity
in block */
def x [T](req: Request)(block: Handler.F[T]) = {
val res = execute(req.host, req.creds, req.req)
val ent = res.getEntity match {
case null = None
case ent = Some(ent)
}
try { block(res.getStatusLine.getStatusCode, res, ent) }
finally { ent foreach (_.consumeContent) }
}
/** Apply Response Handler if reponse code returns true from chk. */
def when[T](chk: Int = Boolean)(hand: Handler[T]) = x(hand.request)
{
case (code, res, ent) if chk(code) = hand.block(code, res, ent)
case (code, _, Some(ent)) = throw StatusCode(code,
EntityUtils.toString(ent, UTF_8))
case (code, _, _) = throw StatusCode(code, [no entity])
}
/** Apply a custom block in addition to predefined response Handler.
*/
def also[A,B](hand: Handler[B])(block: Handler.F[A]) =
x(hand.request) { (code, res, ent) = ( hand.block(code, res,
ent), block(code, res, ent) ) }
/** Apply handler block when response code is 200 - 204 */
def apply[T](hand: Handler[T]) = (this when {code = (200 to 204)
contains code})(hand)
}
/** Nil request, useful to kick off a descriptors that don't have a
factory. */
object /\ extends Request(None, None, Nil)
/* Factory for requests from a host */
object :/ {
def apply(hostname: String, port: Int): Request =
new Request(Some(new HttpHost(hostname, port)), None, Nil)
def apply(hostname: String): Request = new Request(Some(new HttpHost
[Lift] Re: setting user-agent header with Databinder
Sorry. should have thought to tell everyone. I have been coding all day
with tunnel vision!
The : method adds a Map[String, String] of headers to the request object:
http://databinder.net/sxr/dispatch-http/0.5.2/main/Http.scala.html#10878
For user agent it would be something like
val req_with_agent = req : Map(User-Agent - my user agent value)
On Tue, Sep 8, 2009 at 5:17 PM, Randinn rand...@gmail.com wrote:
What was the answer now that you have attained it?
On Sep 9, 3:02 am, Jack Widman jack.wid...@gmail.com wrote:
You are right. I will fine tune my determine which is a good question to
ask
mechanism :)
On Tue, Sep 8, 2009 at 12:54 PM, Timothy Perrett timo...@getintheloop.eu
wrote:
IMHO, you'd probably get better traction with such questions in a
wider audience on the main scala-user list over at EPFL...
Cheers, Tim
On 8 Sep 2009, at 17:26, Jack Widman wrote:
Right. I will try to keep to the topic :)
I actually found him and he quickly answered me.
On Tue, Sep 8, 2009 at 12:24 PM, David Pollak
feeder.of.the.be...@gmail.com
wrote:
Jack,
I'm not sure where N8han (the author of Databinder) hangs out, but
it's not on the Lift list. :-(
Sorry.
David
On Tue, Sep 8, 2009 at 8:58 AM, jack jack.wid...@gmail.com wrote:
Please forgive me for including so much code but I have an important
demo fast approaching and I'm kind of in a bind. I am using
Databinders Dispatch http library which is a wrapper around Javas
HttpClient library. I have included the Http class below. Does anyone
see how to set the user-agent header. Once again I apologize and
would
be much obliged for any help.
import collection.Map
import collection.immutable.{Map = IMap}
import util.DynamicVariable
import java.io.
{InputStream,OutputStream,BufferedInputStream,BufferedOutputStream}
import java.net.URI
import java.util.zip.GZIPInputStream
import org.apache.http._
import org.apache.http.client._
import org.apache.http.impl.client.{DefaultHttpClient,
BasicCredentialsProvider}
import org.apache.http.client.methods._
import org.apache.http.client.entity.UrlEncodedFormEntity
import org.apache.http.client.utils.URLEncodedUtils
import org.apache.http.entity.StringEntity
import org.apache.http.message.BasicNameValuePair
import org.apache.http.protocol.HTTP.UTF_8
import org.apache.http.params.{HttpProtocolParams, BasicHttpParams}
import org.apache.http.util.EntityUtils
import org.apache.http.auth.{AuthScope, UsernamePasswordCredentials,
Credentials}
case class StatusCode(code: Int, contents:String)
extends Exception(Exceptional resoponse code: + code + \n +
contents)
/** Http access point. Standard instances to be used by a single
thread. */
class Http {
val credentials = new DynamicVariable[Option[(AuthScope,
Credentials)]](None)
val client = new ConfiguredHttpClient
def credentialsProvider = new BasicCredentialsProvider {
override def getCredentials(scope: AuthScope) = null
}
/** /** Info Logger for this instance, default returns Connfiggy if
on classpath else console logger. */
lazy val log: Logger = try {
new Logger {
val delegate = net.lag.logging.Logger.get
def info(msg: String, items: Any*) { delegate.info(msg, items:
_*) }
}
} catch {
case e: NoClassDefFoundError = new Logger {
def info(msg: String, items: Any*) {
println(INF: [console logger] dispatch: + msg.format(items:
_*))
}
}
}
**/
/** Execute method for the given host, with logging. */
def execute(host: HttpHost, req: HttpUriRequest) = {
//log.info(%s %s%s, req.getMethod, host, req.getURI)
client.execute(host, req)
}
/** Execute for given optional parametrs, with logging. Creates
local scope for credentials. */
val execute: (Option[HttpHost], Option[Credentials], HttpUriRequest)
= HttpResponse = {
case (Some(host), Some(creds), req) =
client.credentials.withValue(Some((new AuthScope
(host.getHostName, host.getPort), creds)))(execute(host, req))
case (None, Some(creds), _) = error(Credentials specified
without explicit host)
case (Some(host), _, req) = execute(host, req)
case (_, _, req) =
//log.info(%s %s, req.getMethod, req.getURI)
client.execute(req)
}
/** Execute full request-response handler. */
def x[T](hand: Handler[T]): T = x(hand.request)(hand.block)
/** Execute request and handle response codes, response, and entity
in block */
def x [T](req: Request)(block: Handler.F[T]) = {
val res = execute(req.host, req.creds, req.req)
val ent = res.getEntity match {
case null = None
case ent = Some(ent)
}
try { block
[Lift] Re: setting user-agent header
Cool. Thanks. The useful things about Lift seem to never end. On Tue, Sep 8, 2009 at 6:51 PM, Derek Chen-Becker dchenbec...@gmail.comwrote: S.setHeader can be used in Lift to set a response header. Derek On Tue, Sep 8, 2009 at 9:02 AM, jack jack.wid...@gmail.com wrote: Has anyone used dispatch from databinder.net? Its an http library in Scala. I do not know how to set the User-Agent header. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: putting data in a session
Thanks Indrajit for the quick response! On Sun, Sep 6, 2009 at 4:22 PM, Indrajit Raychaudhuri indraj...@gmail.comwrote: object FooVar extends SessionVar[Box[String]](Empty) // to set FooVar.set(Full(fooValToSet)) // to retreive val foo = FooVar.is.openOr(Not found) Cheers, Indrajit On Sep 7, 12:36 am, jack jack.wid...@gmail.com wrote: How do I put something in the session from one page and take it out from another page? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: putting data in a session
I'm sorry for such an elementary question, but what is Empty here? On Sun, Sep 6, 2009 at 4:22 PM, Indrajit Raychaudhuri indraj...@gmail.comwrote: object FooVar extends SessionVar[Box[String]](Empty) // to set FooVar.set(Full(fooValToSet)) // to retreive val foo = FooVar.is.openOr(Not found) Cheers, Indrajit On Sep 7, 12:36 am, jack jack.wid...@gmail.com wrote: How do I put something in the session from one page and take it out from another page? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: putting data in a session
I'm sorry. You probably meant 'None' On Sun, Sep 6, 2009 at 5:05 PM, Jack Widman jack.wid...@gmail.com wrote: I'm sorry for such an elementary question, but what is Empty here? On Sun, Sep 6, 2009 at 4:22 PM, Indrajit Raychaudhuri indraj...@gmail.com wrote: object FooVar extends SessionVar[Box[String]](Empty) // to set FooVar.set(Full(fooValToSet)) // to retreive val foo = FooVar.is.openOr(Not found) Cheers, Indrajit On Sep 7, 12:36 am, jack jack.wid...@gmail.com wrote: How do I put something in the session from one page and take it out from another page? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] stopping an Actor
How does an Actor stop itself from running. That is to say, stop its act method as soon as possible? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: has anyone seen this exception?
I'm able to get the page with wget, no problem. My application is making
many hits to other sites. Maybe that has something to do with it. Also I am
using Jetty in embedded mode. Is there a difference in performance and
throughput with Jetty embedded vs non embedded?
On Fri, Aug 28, 2009 at 12:20 AM, Ross Mellgren dri...@gmail.com wrote:
That error sounds like it's probably that the remote server is
disconnecting prematurely, or is not handling Transfer-Encoding: Chunked as
HttpURLConnection expects.
Have you tried getting whatever URL it's trying with wget or curl?
-Ross
On Aug 27, 2009, at 7:28 PM, Jack Widman wrote:
Here is the code I am using. The exception is happening at line 12, the
line that goes line =
br.readLine()
The exception is happening alot. Any ideas?
package com.authoritude.snippet
import java.io.{InputStreamReader, BufferedInputStream, BufferedReader,
OutputStreamWriter, InputStream}
object StreamUtil {
def streamToString(stream: InputStream): String = {
val buf = new StringBuilder
val br = new BufferedReader(new InputStreamReader(stream))
var line: String = null
var eof = false
while (! eof) {
line = br.readLine()
if (line == null) eof = true else
buf.append(line).append(\n)
}
buf.toString
}
}
On Thu, Aug 27, 2009 at 5:49 PM, David Pollak
feeder.of.the.be...@gmail.com wrote:
This happens sometimes when the client disconnects before the
communications with the server is complete. I see them from time to time
and they indicate to me that the Internet is a random place.
On Thu, Aug 27, 2009 at 12:06 PM, jack jack.wid...@gmail.com wrote:
Has anyone seen this error? I get it while transforming a Stream into
a String. The stream is from an http request I just made.
Message: java.io.IOException: Premature EOF
sun.net.www.http.ChunkedInputStream.readAheadBlocking
(ChunkedInputStream.java:556)
sun.net.www.http.ChunkedInputStream.readAhead
(ChunkedInputStream.java:
600)
sun.net.www.http.ChunkedInputStream.read
(ChunkedInputStream.java:687)
java.io.FilterInputStream.read(FilterInputStream.java:133)
sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read
(HttpURLConnection.java:2419)
sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:282)
sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:324)
sun.nio.cs.StreamDecoder.read(StreamDecoder.java:176)
java.io.InputStreamReader.read(InputStreamReader.java:184)
java.io.BufferedReader.fill(BufferedReader.java:153)
java.io.BufferedReader.readLine(BufferedReader.java:316)
java.io.BufferedReader.readLine(BufferedReader.java:379)
com.abc.snippet.StreamUtil$.streamToString(StreamUtil.scala:12)
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp
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[Lift] Re: has anyone seen this exception?
Here is the code I am using. The exception is happening at line 12, the line
that goes line = br.readLine()
The exception is happening alot. Any ideas?
package com.authoritude.snippet
import java.io.{InputStreamReader, BufferedInputStream, BufferedReader,
OutputStreamWriter, InputStream}
object StreamUtil {
def streamToString(stream: InputStream): String = {
val buf = new StringBuilder
val br = new BufferedReader(new InputStreamReader(stream))
var line: String = null
var eof = false
while (! eof) {
line = br.readLine()
if (line == null) eof = true else
buf.append(line).append(\n)
}
buf.toString
}
}
On Thu, Aug 27, 2009 at 5:49 PM, David Pollak feeder.of.the.be...@gmail.com
wrote:
This happens sometimes when the client disconnects before the
communications with the server is complete. I see them from time to time
and they indicate to me that the Internet is a random place.
On Thu, Aug 27, 2009 at 12:06 PM, jack jack.wid...@gmail.com wrote:
Has anyone seen this error? I get it while transforming a Stream into
a String. The stream is from an http request I just made.
Message: java.io.IOException: Premature EOF
sun.net.www.http.ChunkedInputStream.readAheadBlocking
(ChunkedInputStream.java:556)
sun.net.www.http.ChunkedInputStream.readAhead(ChunkedInputStream.java:
600)
sun.net.www.http.ChunkedInputStream.read(ChunkedInputStream.java:687)
java.io.FilterInputStream.read(FilterInputStream.java:133)
sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read
(HttpURLConnection.java:2419)
sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:282)
sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:324)
sun.nio.cs.StreamDecoder.read(StreamDecoder.java:176)
java.io.InputStreamReader.read(InputStreamReader.java:184)
java.io.BufferedReader.fill(BufferedReader.java:153)
java.io.BufferedReader.readLine(BufferedReader.java:316)
java.io.BufferedReader.readLine(BufferedReader.java:379)
com.abc.snippet.StreamUtil$.streamToString(StreamUtil.scala:12)
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp
--~--~-~--~~~---~--~~
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[Lift] Re: has anyone seen this exception?
Great. Thanks David. I'll try that.
On Fri, Aug 28, 2009 at 12:27 AM, David Pollak
feeder.of.the.be...@gmail.com wrote:
I'd suggest that you use
import net.liftweb.util.Helpers._
def streamToString(stream: InputStream) = new
String(readWholeStream(stream), UTF-8)
See if that makes things better.
On Thu, Aug 27, 2009 at 4:28 PM, Jack Widman jack.wid...@gmail.comwrote:
Here is the code I am using. The exception is happening at line 12, the
line that goes line =
br.readLine()
The exception is happening alot. Any ideas?
package com.authoritude.snippet
import java.io.{InputStreamReader, BufferedInputStream, BufferedReader,
OutputStreamWriter, InputStream}
object StreamUtil {
def streamToString(stream: InputStream): String = {
val buf = new StringBuilder
val br = new BufferedReader(new InputStreamReader(stream))
var line: String = null
var eof = false
while (! eof) {
line = br.readLine()
if (line == null) eof = true else
buf.append(line).append(\n)
}
buf.toString
}
}
On Thu, Aug 27, 2009 at 5:49 PM, David Pollak
feeder.of.the.be...@gmail.com wrote:
This happens sometimes when the client disconnects before the
communications with the server is complete. I see them from time to time
and they indicate to me that the Internet is a random place.
On Thu, Aug 27, 2009 at 12:06 PM, jack jack.wid...@gmail.com wrote:
Has anyone seen this error? I get it while transforming a Stream into
a String. The stream is from an http request I just made.
Message: java.io.IOException: Premature EOF
sun.net.www.http.ChunkedInputStream.readAheadBlocking
(ChunkedInputStream.java:556)
sun.net.www.http.ChunkedInputStream.readAhead(ChunkedInputStream.java:
600)
sun.net.www.http.ChunkedInputStream.read(ChunkedInputStream.java:687)
java.io.FilterInputStream.read(FilterInputStream.java:133)
sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read
(HttpURLConnection.java:2419)
sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:282)
sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:324)
sun.nio.cs.StreamDecoder.read(StreamDecoder.java:176)
java.io.InputStreamReader.read(InputStreamReader.java:184)
java.io.BufferedReader.fill(BufferedReader.java:153)
java.io.BufferedReader.readLine(BufferedReader.java:316)
java.io.BufferedReader.readLine(BufferedReader.java:379)
com.abc.snippet.StreamUtil$.streamToString(StreamUtil.scala:12)
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp
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[Lift] Re: Regarding my question about not showing the password in the querystring.
Thanks Jeppe. I wasn't realizing that since it has to be done on the server, there's a chicken and egg problem with respect to getting it there encrypted. I just wasn't thinking. I will use a post. On Wed, Aug 26, 2009 at 6:45 AM, Jeppe Nejsum Madsen je...@ingolfs.dkwrote: jack jack.wid...@gmail.com writes: Of course I could use a POST instead of a GET but my question was really about how to process a form value in a snippet, before the form is submitted. This way I can encrypt the password before it is sent in the body of the post, over the wire. Snippets are server side code. If you need to encrypt the password before it is sent, you need to do it in the browser (ie Javascript). Lift doesn't really do this (but can make a snippet that generates the javascript for you) If you are concerned about sending clear text over the wire, I strongly suggest you use https instead of trying to roll your own encryption in javascript :-) /Jeppe --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: simple Ajax form
Excellent. Thanks David.
On Mon, Aug 24, 2009 at 8:08 PM, David Pollak feeder.of.the.be...@gmail.com
wrote:
On Sun, Aug 23, 2009 at 10:40 PM, jack jack.wid...@gmail.com wrote:
I am trying to make a simple ajax form. The code is below. The
Javascript error I am getting when I hit the send button is:
uncaught exception ReferenceError: F777221462447MPT is not defined
Am I missing something?
lift:surround with=default at=content
h1Hello FormAjax/h1
lift:HelloFormAjax.show
Hello hello:who/br/
label for=whoFieldWho :/labelhello:whoField/
hello:submit/
/lift:HelloFormAjax.show
/lift:surround
create src/main/scala/sandbox/lift/hellodarwin/snippet/HelloFormAjax
package sandbox.lift.hellodarwin.snippet
import scala.xml.NodeSeq
import net.liftweb.http.S._
import net.liftweb.http.SHtml._
import net.liftweb.util.Helpers._
import net.liftweb.http.js.{JsCmd, JsCmds}
class HelloFormAjax {
def whoNode(str: String) = span id=who{str}/span
def updateWho(str: String): JsCmd = {
println(updateWho on + str)
JsCmds.Run($('#who').text('+str+'))
This will fail if str contains any non-printables or '. Please use:
str.encJs
To encode a Scala String into a JavaScript friendly String.
But better, you could use:
SetHtml(who, scala.xml.Text(str))
}
def show(xhtml: NodeSeq): NodeSeq = {
bind(hello, xhtml,
whoField - text(world, null) % (size - 10) % (id -
whoField),
submit - button type=button{?(Send)}/button %
(onclick - ajaxCall(JsRaw($('#whoField').attr('value')), s =
updateWho(s))),
ajaxCall returns a tuple of (String, JsExp). I'm not sure why the compiler
is letting that get converted into the second half of a pair for
UnparsedAttribute purposes... but... in order to use it, you must do:
ajaxCall(JsRaw($('#whoField').attr('value')), s =updateWho(s))._2
But... it'd be better to ValById:
ajaxCall(ValById(whoField), , s =updateWho(s))._2
I've added a few helpers to ajaxButton, so you can do:
submit - ajaxButton(Text(?(Send)), ValById(whoField), s =
updateWho(s))
who - whoNode(world)
)
}
}
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp
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[Lift] Re: Lift vs Rails
Thanks Derek for the quick and helpful response. I am going to go with Lift. On Sun, Aug 23, 2009 at 12:49 PM, Derek Williams de...@nebvin.ca wrote: On Sun, Aug 23, 2009 at 8:45 AM, jack jack.wid...@gmail.com wrote: I really do want to use Lift instead of Rails. Could somebody please convince me? :) I used to struggle with Rails (and to a lesser extent Merb) because it was difficult to do things that weren't the Rails Way. Lift does have a recommended way of doing things as well but I haven't yet run into issues where I had to fight the framework in order to do things my way. This aspect along with the performance and ease of use makes it my preferred framework by far. If you are not doing the coding yourself, finding a programmer might be an issue as experienced Scala developers (not to mention Lift developers) are probably much harder to find then Ruby and Rails developers. As far as existing libraries, being able to use any Java library is a big plus. It can sometimes be hard to find a good (or maintained) ruby library in order to use an existing binary (C/C++) library. The only thing at the moment that I would like to be better is Text Editor/IDE support. I don't find this to be too bad of a problem though as I spent all of my Ruby development struggling with the same things. I ended up using Vim for ruby development, and have now turned to Emacs for Scala development. For learning Scala I used Eclipse as it did a good job of giving me documentation for Classes/Methods. After a couple of months of coding I only have to reference the scaladocs once in a while as I find the language to be very natural. But these are issues that you will run into with Ruby development too, as getting good IDE support for a dynamic language can be even more difficult. I'd recommend Lift for your project, especially considering you want to use plenty of Ajax/Comet. I never even considered using Comet in a web project of mine until I started using Lift. The only case where I might recommend Rails is if you are not a decent coder yourself and you aren't able to find a good Lift developer to work with. Hope this helps -- Derek Williams --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: Lift vs Rails
Thanks Marius. I agree its a no brainer. Just wanted some independent confirmation!. On Sun, Aug 23, 2009 at 1:08 PM, marius d. marius.dan...@gmail.com wrote: Looks like you don't need to be convinced :) ... Scala with its features + Java compatibility + Lift's rich set of features + performance of Scala Lift makes it a no brainer. Enumerating all the pros of Scala and Lift would just take way to long. The list of Scala books and the Lift book are enlisted here http://www.scala-lang.org/node/959 Br's, Marius On Aug 23, 5:45 pm, jack jack.wid...@gmail.com wrote: I am doing a startup company that involves both a lot of processing on the backend (in the code) and a decent amount of comet/ajax in the frontend.It is very important that the code quickly on the server. I have seen the light with respect to Scala and Lift looks terrific. My only concern is how new it is and the availability of resources (programmers, books etc). I really do want to use Lift instead of Rails. Could somebody please convince me? :) --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
