[Lift] Re: Object Relationships and the .obj method
Derek, Just want to thank you for your attention to this thread, and your quick update of the master.pdf, I know this will clear things up for others as well! I will absolutely provide any other feedback I can. Thank You for all your work on Exploring Lift! - Grant Wood --~--~-~--~~~---~--~~ 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 on Build from source
why i cann't see my post at group?
On Tue, Jul 28, 2009 at 11:48 AM, Nile Black nile.bl...@gmail.com wrote:
[INFO] Building Lift Utils
[INFO]task-segment: [install]
[INFO]
[INFO] [resources:resources]
[INFO] Using default encoding to copy filtered resources.
[INFO] [yuicompressor:compress {execution: default}]
[INFO] nb warnings: 0, nb errors: 0
[INFO] [compiler:compile]
[INFO] Nothing to compile - all classes are up to date
[INFO] [scala:compile {execution: default}]
[INFO] Checking for multiple versions of scala
[INFO] Compiling 37 source files to D:\user\liftweb\lift-util\target
\classes
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\ConcurrentLock.scala:16: error: value util is not a member of package
net.java
[WARNING] import java.util.concurrent.locks._
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\CurrencyZone.scala:69: error: value lang is not a member of package
net.java
[WARNING] } catch { case e: java.lang.NumberFormatException =
{
[WARNING]^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\CurrencyZone.scala:72: error: value text is not a member of package
net.java
[WARNING] } catch { case e:
java.text.ParseException = {
[WARNING]^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\CurrencyZone.scala:103: error: value math is not a member of package
net.java
[WARNING] make(new BigDecimal(this.amount.bigDecimal.divide
(that.amount.bigDecimal, scale, java.math.BigDecimal.ROUND_HALF_UP)) )
[WARNING]
^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\IOHelpers.scala:104: error: value io is not a member of package
net.java
[WARNING] def doClose[T](is: java.io.Closeable*)(f : = T): T = {
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\Mailer.scala:84: error: value util is not a member of package
net.java
[WARNING] import java.util.Properties
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\PCDataMarkupParser.scala:187: error: value io is not a member of
package net.java
[WARNING] import java.io.ByteArrayInputStream
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\Props.scala:178: error: value io is not a member of package net.java
[WARNING] import java.io.{ByteArrayInputStream}
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\Props.scala:179: error: value util is not a member of package
net.java
[WARNING] import java.util.InvalidPropertiesFormatException
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\SoftReferenceCache.scala:3: error: value lang is not a member of
package net.java
[WARNING] import java.lang.ref.{ReferenceQueue,SoftReference};
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\SoftReferenceCache.scala:4: error: value util is not a member of
package net.java
[WARNING] import java.util._
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\SoftReferenceCache.scala:147: error: wrong number of arguments for
constructor Object: ()jav
a.lang.Object
[WARNING] queue: ReferenceQueue[Any]) extends
SoftReference[V](v, queue) {
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\TemplateCache.scala:17: error: value util is not a member of package
net.java
[WARNING] import java.util.{Locale}
[WARNING] ^
[WARNING] 13 errors found
[INFO]
[ERROR] BUILD FAILURE
[INFO]
[INFO] command line returned non-zero value:1
[INFO]
[INFO] For more information, run Maven with the -e switch
[INFO]
[INFO] Total time: 1 minute 15 seconds
[INFO] Finished at: Tue Jul 28 11:47:44 CST 2009
[INFO] Final Memory: 22M/39M
[INFO]
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[Lift] Re: Hear podcast interview with David Pollack about Lift
As a newbie who is already onboard with Lift and Scala, this was a very good podcast for me. Thanks, Terry On Jul 27, 7:12 pm, Timothy Perrett timo...@getintheloop.eu wrote: Sweet link Cheers, Tim On Jul 27, 7:40 pm, Goldfish gregt...@mindspring.com wrote: Visithttp://pondjumpers.com/2009/07/27/episode-2-interview-about-lift/ to hear a podcast interview with David Pollack about Lift. --~--~-~--~~~---~--~~ 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: the question abount HelloForm2 of example darwin
Thank you Tim, That helps me. koji On 7月28日, 上午6時40分, Timothy Perrett timo...@getintheloop.eu wrote: Hey Koji, So I took a look at your problem and made an example, please check the code here under basic-forms: http://github.com/timperrett/lift-examples/tree/master I have a feeling that S.param used to work differently... lift assigns random names to the inputs at runtime for security, so doing S.param (whoField) wont get you anywhere anyways; IMHO this is a bug in the example, not your code. You might want to check my examples anyway though as i've made some changes and added comments you might find helpful. Cheers, Tim --~--~-~--~~~---~--~~ 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: Minimizing Memory Usage
What version of Lift are you using? Are you using scala.actors code within your application at all? Cheers, Tim On Jul 28, 2:47 am, Peter Robinett pe...@bubblefoundry.com wrote: Hi all, I'm running Lift on the smallest Slicehost VPS available (256 mb RAM, plus 512 mb swap) and I've recently run into some memory issues. I'm also running Apache and MySQL on the machine, so Lift and its environment is by no means the only cause, but I'd like to ask you all about how Lift uses memory and whether I can make more efficient use of the little memory I currently have. I was just doing a quick-and-dirty test, so I ran Lift under jetty: nohup mvn jetty:run Before I launched jetty and Lift I was using approximately 150 mb of RAM and little if any swap space. Twelve hours later all physical and swap memory was used up. During those twelve hours I was receiving a POSTed message approximately every second, creating a model and then in its createdRow method sending the new object to a singleton object which sent it on to the appropriate actor (there being around 20 and all of them being launched in Lift's boot method). Very rarely these actors would have a few Comet listeners. Looking at the nohup log I see that lots of sessions started expiring maybe 8 hours from launch and continued in waves until I killed the process. I also see some stack traces about Comet requests, doContinuation, and Bail. Does this suggest that I'm using Actors incorrectly? Do I have too long a session timeout? Or do I just need more memory? Assuming the latter, how would you suggest figuring out a reasonable amount? Thanks for your help, Peter Robinett PS Some additional system details: cat /proc/system Linux version 2.6.24-19-xen (bui...@king) (gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu7)) #1 SMP Sat Jul 12 00:15:59 UTC 2008 java -version java version 1.6.0_0 IcedTea6 1.3.1 (6b12-0ubuntu6.4) Runtime Environment (build 1.6.0_0- b12) OpenJDK 64-Bit Server VM (build 1.6.0_0-b12, mixed mode) --~--~-~--~~~---~--~~ 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 on Build from source
Can you provide some enviroment details What version of maven are
you using? What JDK?
What maven command did you run?
Cheers, Tim
On Jul 28, 4:48 am, Nile Black nile.bl...@gmail.com wrote:
[INFO] Building Lift Utils
[INFO] task-segment: [install]
[INFO]
[INFO] [resources:resources]
[INFO] Using default encoding to copy filtered resources.
[INFO] [yuicompressor:compress {execution: default}]
[INFO] nb warnings: 0, nb errors: 0
[INFO] [compiler:compile]
[INFO] Nothing to compile - all classes are up to date
[INFO] [scala:compile {execution: default}]
[INFO] Checking for multiple versions of scala
[INFO] Compiling 37 source files to D:\user\liftweb\lift-util\target
\classes
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\ConcurrentLock.scala:16: error: value util is not a member of package
net.java
[WARNING] import java.util.concurrent.locks._
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\CurrencyZone.scala:69: error: value lang is not a member of package
net.java
[WARNING] } catch { case e: java.lang.NumberFormatException =
{
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\CurrencyZone.scala:72: error: value text is not a member of package
net.java
[WARNING] } catch { case e:
java.text.ParseException = {
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\CurrencyZone.scala:103: error: value math is not a member of package
net.java
[WARNING] make(new BigDecimal(this.amount.bigDecimal.divide
(that.amount.bigDecimal, scale, java.math.BigDecimal.ROUND_HALF_UP)) )
[WARNING]
^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\IOHelpers.scala:104: error: value io is not a member of package
net.java
[WARNING] def doClose[T](is: java.io.Closeable*)(f : = T): T = {
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\Mailer.scala:84: error: value util is not a member of package
net.java
[WARNING] import java.util.Properties
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\PCDataMarkupParser.scala:187: error: value io is not a member of
package net.java
[WARNING] import java.io.ByteArrayInputStream
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\Props.scala:178: error: value io is not a member of package net.java
[WARNING] import java.io.{ByteArrayInputStream}
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\Props.scala:179: error: value util is not a member of package
net.java
[WARNING] import java.util.InvalidPropertiesFormatException
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\SoftReferenceCache.scala:3: error: value lang is not a member of
package net.java
[WARNING] import java.lang.ref.{ReferenceQueue,SoftReference};
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\SoftReferenceCache.scala:4: error: value util is not a member of
package net.java
[WARNING] import java.util._
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\SoftReferenceCache.scala:147: error: wrong number of arguments for
constructor Object: ()jav
a.lang.Object
[WARNING] queue: ReferenceQueue[Any]) extends
SoftReference[V](v, queue) {
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\TemplateCache.scala:17: error: value util is not a member of package
net.java
[WARNING] import java.util.{Locale}
[WARNING] ^
[WARNING] 13 errors found
[INFO]
[ERROR] BUILD FAILURE
[INFO]
[INFO] command line returned non-zero value:1
[INFO]
[INFO] For more information, run Maven with the -e switch
[INFO]
[INFO] Total time: 1 minute 15 seconds
[INFO] Finished at: Tue Jul 28 11:47:44 CST 2009
[INFO] Final Memory: 22M/39M
[INFO]
--~--~-~--~~~---~--~~
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[Lift] Re: Minimizing Memory Usage
So the machine has 256 mb of RAM but did you configure the JVM max heap size? .. How much MySql eats up out of 256 mb ? (let's live the swap out for a bit) Are you running the JVM with -server option? BTW 256mb seems to me ridiculous small for a server side application. Br's, Marius On Jul 28, 4:47 am, Peter Robinett pe...@bubblefoundry.com wrote: Hi all, I'm running Lift on the smallest Slicehost VPS available (256 mb RAM, plus 512 mb swap) and I've recently run into some memory issues. I'm also running Apache and MySQL on the machine, so Lift and its environment is by no means the only cause, but I'd like to ask you all about how Lift uses memory and whether I can make more efficient use of the little memory I currently have. I was just doing a quick-and-dirty test, so I ran Lift under jetty: nohup mvn jetty:run Before I launched jetty and Lift I was using approximately 150 mb of RAM and little if any swap space. Twelve hours later all physical and swap memory was used up. During those twelve hours I was receiving a POSTed message approximately every second, creating a model and then in its createdRow method sending the new object to a singleton object which sent it on to the appropriate actor (there being around 20 and all of them being launched in Lift's boot method). Very rarely these actors would have a few Comet listeners. Looking at the nohup log I see that lots of sessions started expiring maybe 8 hours from launch and continued in waves until I killed the process. I also see some stack traces about Comet requests, doContinuation, and Bail. Does this suggest that I'm using Actors incorrectly? Do I have too long a session timeout? Or do I just need more memory? Assuming the latter, how would you suggest figuring out a reasonable amount? Thanks for your help, Peter Robinett PS Some additional system details: cat /proc/system Linux version 2.6.24-19-xen (bui...@king) (gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu7)) #1 SMP Sat Jul 12 00:15:59 UTC 2008 java -version java version 1.6.0_0 IcedTea6 1.3.1 (6b12-0ubuntu6.4) Runtime Environment (build 1.6.0_0- b12) OpenJDK 64-Bit Server VM (build 1.6.0_0-b12, mixed mode) --~--~-~--~~~---~--~~ 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: Minimizing Memory Usage
Agreed; its pretty light to run all those services. I have a lift based app that's been running for quite some time and its using around 250mb of RAM on average. A raw lift app will probably use 128mb RAM as minimum. Cheers, Tim On 28/07/2009 10:08, marius d. marius.dan...@gmail.com wrote: BTW 256mb seems to me ridiculous small for a server side application. --~--~-~--~~~---~--~~ 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 on Build from source
why i cann't see my post at group?
All new members are moderated to start with.
On Jul 27, 11:56 pm, nile black nile.bl...@gmail.com wrote:
why i cann't see my post at group?
On Tue, Jul 28, 2009 at 11:48 AM, Nile Black nile.bl...@gmail.com wrote:
[INFO] Building Lift Utils
[INFO] task-segment: [install]
[INFO]
[INFO] [resources:resources]
[INFO] Using default encoding to copy filtered resources.
[INFO] [yuicompressor:compress {execution: default}]
[INFO] nb warnings: 0, nb errors: 0
[INFO] [compiler:compile]
[INFO] Nothing to compile - all classes are up to date
[INFO] [scala:compile {execution: default}]
[INFO] Checking for multiple versions of scala
[INFO] Compiling 37 source files to D:\user\liftweb\lift-util\target
\classes
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\ConcurrentLock.scala:16: error: value util is not a member of package
net.java
[WARNING] import java.util.concurrent.locks._
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\CurrencyZone.scala:69: error: value lang is not a member of package
net.java
[WARNING] } catch { case e: java.lang.NumberFormatException =
{
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\CurrencyZone.scala:72: error: value text is not a member of package
net.java
[WARNING] } catch { case e:
java.text.ParseException = {
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\CurrencyZone.scala:103: error: value math is not a member of package
net.java
[WARNING] make(new BigDecimal(this.amount.bigDecimal.divide
(that.amount.bigDecimal, scale, java.math.BigDecimal.ROUND_HALF_UP)) )
[WARNING]
^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\IOHelpers.scala:104: error: value io is not a member of package
net.java
[WARNING] def doClose[T](is: java.io.Closeable*)(f : = T): T = {
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\Mailer.scala:84: error: value util is not a member of package
net.java
[WARNING] import java.util.Properties
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\PCDataMarkupParser.scala:187: error: value io is not a member of
package net.java
[WARNING] import java.io.ByteArrayInputStream
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\Props.scala:178: error: value io is not a member of package net.java
[WARNING] import java.io.{ByteArrayInputStream}
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\Props.scala:179: error: value util is not a member of package
net.java
[WARNING] import java.util.InvalidPropertiesFormatException
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\SoftReferenceCache.scala:3: error: value lang is not a member of
package net.java
[WARNING] import java.lang.ref.{ReferenceQueue,SoftReference};
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\SoftReferenceCache.scala:4: error: value util is not a member of
package net.java
[WARNING] import java.util._
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\SoftReferenceCache.scala:147: error: wrong number of arguments for
constructor Object: ()jav
a.lang.Object
[WARNING] queue: ReferenceQueue[Any]) extends
SoftReference[V](v, queue) {
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\TemplateCache.scala:17: error: value util is not a member of package
net.java
[WARNING] import java.util.{Locale}
[WARNING] ^
[WARNING] 13 errors found
[INFO]
[ERROR] BUILD FAILURE
[INFO]
[INFO] command line returned non-zero value:1
[INFO]
[INFO] For more information, run Maven with the -e switch
[INFO]
[INFO] Total time: 1 minute 15 seconds
[INFO] Finished at: Tue Jul 28 11:47:44 CST 2009
[INFO] Final Memory: 22M/39M
[INFO]
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[Lift] Re: Object Relationships and the .obj method
My pleasure. I'll be the first to admit that the book still needs a lot of work, so anyone with feedback is more than welcome to submit it. I've slowly been working through the backlog of feedback that we've already received, so the quality, breadth and depth of the book should continue to improve. My goal is to have it age like wine and not like milk ;) Derek On Tue, Jul 28, 2009 at 12:14 AM, Grant Wood smackt...@gmail.com wrote: Derek, Just want to thank you for your attention to this thread, and your quick update of the master.pdf, I know this will clear things up for others as well! I will absolutely provide any other feedback I can. Thank You for all your work on Exploring Lift! - Grant Wood --~--~-~--~~~---~--~~ 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: Modularization of Lift code
Glenn, You have my full attention - this is something I've been sitting on for quite some time but just not quite sure what the best route forward is. When im creating these modules, I essentially just build a normal jar project with maven, and as you say, if I have JS or whatever that I need to use I just specify that with ResourceServer (in the module JAR init). To date I've not actually needed to pull a template from another JAR, but looking at ResourceServer.findResourceInClasspath I think it could do it... If memory serves DPP checked in a change to make this work about 2 weeks ago... In terms of having a defined loading pattern, its possible, but would need outlining with some very specific details... IMO, adding one line of code to Boot.scala is not a big deal so we would really need a good reason to add a bunch of reflection which can sometime feel like voodoo because its not clear what its loading and why (one of the reasons I went off ruby). Cheers, tim On 28/07/2009 17:00, glenn gl...@exmbly.com wrote: Hi, Tim, So, what you do is put all new LiftRules, Schemifier and ResourceServer stuff in an init function and run it after the Boot.scala defaults. Sounds simple enough. When creating your modules, do you just strip out all the stock webapp files (those that come with the maven lift archetypes), and put all your new resources in a toserve directory, then just jar it up? And what about any new template files? Where do those go in you module jars? You can't put them in the toserver directory. My understanding is that that would install them in the WEB-INF/classes directory of your final war file, when they need to go into the root webapp. I still see loose ends here. Also, what if you didn't have to modify Bool.scala for every module you add. Some hook function in an object that Boot.scala runs each time that would iterate through all your init functions that followed a pre- defined signature, would be a nice feature to add to Lift. Glenn... On Jul 27, 4:01 pm, Timothy Perrett timo...@getintheloop.eu wrote: Hi Glen... I actually do a lot of this - we have a product at work and i've just written a bunch of abstractions for work which just require me to do: MyLib.init In the boot file of a new application and then everything wires up - I couldn't think of anything more straightforward? The vast majority of stuff in lift is done with PF's, so you can pretty much just write them in external jars, and import them - my 3rd part stuff usually has a lift-webkit dependency so that I can just do the LiftRules.disptach.append stuff directly in the init method, but its really no biggy and saves boilerplate. So given your example, this scheme should work right? Cheers, Tim On Jul 27, 11:52 pm, glenn gl...@exmbly.com wrote: I'm interested in abstracting out useful features from my Lift applications for ease of reuse, but I haven't found an easy way to do it. I find myself creating a new Lift aplication for each feature, with all the baggage (bootstrapping, etc.), and I then have to do a lot of code modification to the application I'm adding the feature to in order to get it to work. For example, suppose I want to add role-based user login to an application that already has a User model just by dropping in a jar file with the new feature. I don't see how to do it without some boostrapping modifications. Has anyone really tried to modularize their Lift development. I'd be very interested in some suggestions. --~--~-~--~~~---~--~~ 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: Modularization of Lift code
http://github.com/dpp/liftweb/commit/0f60807dd64b7fe1430919738b46f2ebe1758f22 ... From: feeder.of.the.be...@gmail.com Subject:[Lift] Re: ResourceServer problem Date: July 22, 2009 12:07:14 PM EDT To: liftweb@googlegroups.com Reply-To: liftweb@googlegroups.com On Tue, Jul 21, 2009 at 9:55 PM, Naftoli Gugenheim naftoli...@gmail.com wrote: Now a direct call to ResourceServer does work, but the template is still not being found. Any ideas? Templates are looked up simply by using the ServletContainer Context's resource locator. I've expanded the lookup process so that stuff in JAR files will be found. I'll commit the changes up in 10 minutes or so. -Ross On Jul 28, 2009, at 12:36 PM, Timothy Perrett wrote: Glenn, You have my full attention - this is something I've been sitting on for quite some time but just not quite sure what the best route forward is. When im creating these modules, I essentially just build a normal jar project with maven, and as you say, if I have JS or whatever that I need to use I just specify that with ResourceServer (in the module JAR init). To date I've not actually needed to pull a template from another JAR, but looking at ResourceServer.findResourceInClasspath I think it could do it... If memory serves DPP checked in a change to make this work about 2 weeks ago... In terms of having a defined loading pattern, its possible, but would need outlining with some very specific details... IMO, adding one line of code to Boot.scala is not a big deal so we would really need a good reason to add a bunch of reflection which can sometime feel like voodoo because its not clear what its loading and why (one of the reasons I went off ruby). Cheers, tim On 28/07/2009 17:00, glenn gl...@exmbly.com wrote: Hi, Tim, So, what you do is put all new LiftRules, Schemifier and ResourceServer stuff in an init function and run it after the Boot.scala defaults. Sounds simple enough. When creating your modules, do you just strip out all the stock webapp files (those that come with the maven lift archetypes), and put all your new resources in a toserve directory, then just jar it up? And what about any new template files? Where do those go in you module jars? You can't put them in the toserver directory. My understanding is that that would install them in the WEB-INF/classes directory of your final war file, when they need to go into the root webapp. I still see loose ends here. Also, what if you didn't have to modify Bool.scala for every module you add. Some hook function in an object that Boot.scala runs each time that would iterate through all your init functions that followed a pre- defined signature, would be a nice feature to add to Lift. Glenn... On Jul 27, 4:01 pm, Timothy Perrett timo...@getintheloop.eu wrote: Hi Glen... I actually do a lot of this - we have a product at work and i've just written a bunch of abstractions for work which just require me to do: MyLib.init In the boot file of a new application and then everything wires up - I couldn't think of anything more straightforward? The vast majority of stuff in lift is done with PF's, so you can pretty much just write them in external jars, and import them - my 3rd part stuff usually has a lift-webkit dependency so that I can just do the LiftRules.disptach.append stuff directly in the init method, but its really no biggy and saves boilerplate. So given your example, this scheme should work right? Cheers, Tim On Jul 27, 11:52 pm, glenn gl...@exmbly.com wrote: I'm interested in abstracting out useful features from my Lift applications for ease of reuse, but I haven't found an easy way to do it. I find myself creating a new Lift aplication for each feature, with all the baggage (bootstrapping, etc.), and I then have to do a lot of code modification to the application I'm adding the feature to in order to get it to work. For example, suppose I want to add role-based user login to an application that already has a User model just by dropping in a jar file with the new feature. I don't see how to do it without some boostrapping modifications. Has anyone really tried to modularize their Lift development. I'd be very interested in some suggestions. --~--~-~--~~~---~--~~ 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: Custom login
On Mon, Jul 27, 2009 at 3:12 AM, MrWHO fabb...@gmail.com wrote: Hi all! Again a probably silly question, but I haven't been able to find a clue anywhere. I'd like to use my own login page for an application. I can get as far as creating my own form - and posting to /user_mgt/login and if the login goes right there is no problem. But if the login fails I'm sent back to /user_mgt/login - the default page of Lift. I tried overriding the value of login page in the User class, but with no luck. Can you post the code you used to override the MegaProtoUser login page? What's the proper way of defining my own login page? Cheers, Fabio -- 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 --~--~-~--~~~---~--~~ 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: erro: MappedDouble is not mapped to 'double precision' datatype in PostgreSQL?
Hi Derek,
I am using liftweb version 1.0
Thanks!
On Jul 27, 10:27 pm, Derek Chen-Becker dchenbec...@gmail.com wrote:
This looks like an issue with PostgreSQLDriver. The type should be DOUBLE
PRECISION. What version of Lift are you using? Let me know and I'll put a
fix in the proper place.
Derek
On Sun, Jul 26, 2009 at 5:59 AM, JanWillem Tulp
janwillem.t...@gmail.comwrote:
Still looking to find a solution for this, or at least what causes
this behavior. I am looking at the Liftweb source code, and see in the
BaseMetaMapper trait a function called buildMapper that does some
pattern matching on SQL column types (colType). Just for my
understanding, why is there a match for almost any of the basic SQL
types, but not for Types.DOUBLE?
Has anyone else run into this problem?
On Jul 26, 1:34 am, JanWillem Tulp janwillem.t...@gmail.com wrote:
Hi all,
I'm not sure that I am missing something here, but the Schemifier
cannot create a table for a model class that contains an object that
extends from MappedDouble.
This is the Lift code:
class MeasureValue extends LongKeyedMapper[MeasureValue] with IdPK {
def getSingleton = MeasureValue
object value extends MappedDouble(this)
object measure extends MappedLongForeignKey(this, Measure)
}
object MeasureValue extends MeasureValue with LongKeyedMetaMapper
[MeasureValue]
I added MeasureValue to the Schemifier so that it will create a table
when boot is executed. However, this is the stacktrace I get when I
start the application:
main INFO lift - CREATE TABLE measurevalue (measure BIGINT , value
DOUBLE , id BIGSERIAL)
main ERROR lift - Failed to Boot
org.postgresql.util.PSQLException: ERROR: type double does not exist
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse
(QueryExecutorImpl.java:1592)
at org.postgresql.core.v3.QueryExecutorImpl.processResults
(QueryExecutorImpl.java:1327)
at org.postgresql.core.v3.QueryExecutorImpl.execute
(QueryExecutorImpl.java:192)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute
(AbstractJdbc2Statement.java:451)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags
(AbstractJdbc2Statement.java:336)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute
(AbstractJdbc2Statement.java:328)
at net.liftweb.mapper.Schemifier$.net$liftweb$mapper$Schemifier$
$maybeWrite(Schemifier.scala:150)
at net.liftweb.mapper.Schemifier$.net$liftweb$mapper$Schemifier$
$ensureTable(Schemifier.scala:160)
at
net.liftweb.mapper.Schemifier$$anonfun$schemify$1$$anonfun$1.apply
(Schemifier.scala:60)
at
net.liftweb.mapper.Schemifier$$anonfun$schemify$1$$anonfun$1.apply
(Schemifier.scala:60)
at scala.List.foldLeft(List.scala:1066)
at net.liftweb.mapper.Schemifier$$anonfun$schemify$1.apply
(Schemifier.scala:60)
at net.liftweb.mapper.Schemifier$$anonfun$schemify$1.apply
(Schemifier.scala:54)
at net.liftweb.mapper.DB$.use(DB.scala:305)
at net.liftweb.mapper.Schemifier$.schemify(Schemifier.scala:53)
at net.liftweb.mapper.Schemifier$.schemify(Schemifier.scala:36)
at bootstrap.liftweb.Boot.boot(Boot.scala:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke
(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at net.liftweb.util.ClassHelpers$$anonfun$createInvoker$1.apply
(ClassHelpers.scala:392)
at net.liftweb.util.ClassHelpers$$anonfun$createInvoker$1.apply
(ClassHelpers.scala:390)
at net.liftweb.http.DefaultBootstrap$$anonfun$boot$1.apply
(LiftRules.scala:909)
at net.liftweb.http.DefaultBootstrap$$anonfun$boot$1.apply
(LiftRules.scala:909)
at net.liftweb.util.Full.map(Box.scala:330)
at net.liftweb.http.DefaultBootstrap$.boot(LiftRules.scala:909)
at net.liftweb.http.LiftFilter.bootLift(LiftServlet.scala:573)
at net.liftweb.http.LiftFilter.init(LiftServlet.scala:548)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter
(ApplicationFilterConfig.java:275)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef
(ApplicationFilterConfig.java:397)
at org.apache.catalina.core.ApplicationFilterConfig.init
(ApplicationFilterConfig.java:108)
at org.apache.catalina.core.StandardContext.filterStart
(StandardContext.java:3800)
at org.apache.catalina.core.StandardContext.start
(StandardContext.java:4450)
at org.apache.catalina.core.ContainerBase.addChildInternal
(ContainerBase.java:791)
at
[Lift] Automatic background AJAX: best way to do it?
I have a project that will use the geolocation API in Firefox 3.5, Google Gears and other JS frameworks. It will need to keep the user's position updated using the watchPosition API, fetching nearby POIs and such whenever the position changes. I'm actually fairly new to AJAX, and am trying to figure out the best way to do this. Most of the AJAX examples I've seen involve user interaction, such as entering into a text field than removing focus, or waiting on state updates, as with comet. In this case, there's state that may update often or never, and those updates will be triggered by a callback function in the background, with no user interaction into which I can hook. I also don't want to leave a Comet connection open to the app waiting on updates, since the app may see mobile use, and I can't imagine holding open a connection being great for battery life. I'm wondering what the best way to do this would be, while staying fairly close to what Lift offers? Thus far I have two options. 1. Create a REST API and have the Javascript call a specified URL whenever the position changes, inserting the resulting JSON into the page at appropriate places. This works, but seems like it'd involve lots of extra effort, as well as straying away from Lift/Scala's added benefits into the dynamicity of JS, which I'm not entirely comfortable with. 2. Create a hidden JSON form on the page. When the position changes, the JS callback function fills out and submits the form in the background. This seems a bit hackish, with the hidden form and all, but this makes the problem one that is on a bit less shaky Lift ground. I can then use Lift's provided functionality to generate JS for replacing page contents with the results of evaluating the form submission. I'm basically going from the Lift book here. Most ideal, I'd think, would be if there was some way to have my callback function call a snippet directly and be handed back the JS needed, without having to create a separate web service API for this one call. Is the JSON form method the best option here? Or is there some new shiny in 1.1 that isn't documented in the Lift book yet? (or perhaps it *is* documented and I'm just missing it. :) Thanks. -- Nolan Darilek http://thewordnerd.info --~--~-~--~~~---~--~~ 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: Custom login
I think you have to override loginXhtml and/or screenWrap. - David Pollakfeeder.of.the.be...@gmail.com wrote: On Mon, Jul 27, 2009 at 3:12 AM, MrWHO fabb...@gmail.com wrote: Hi all! Again a probably silly question, but I haven't been able to find a clue anywhere. I'd like to use my own login page for an application. I can get as far as creating my own form - and posting to /user_mgt/login and if the login goes right there is no problem. But if the login fails I'm sent back to /user_mgt/login - the default page of Lift. I tried overriding the value of login page in the User class, but with no luck. Can you post the code you used to override the MegaProtoUser login page? What's the proper way of defining my own login page? Cheers, Fabio -- 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 --~--~-~--~~~---~--~~ 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 on Build from source
If it thinks import java.xxx is a relative import of net.java.xxx, then it must
be you're somehow building it with a net.java package in the classpath.
The question is why maven is building it with a different classpath than it
uses for everyone else, and why those imports don't start with _root_.
-
TylerWeirtyler.w...@gmail.com wrote:
why i cann't see my post at group?
All new members are moderated to start with.
On Jul 27, 11:56 pm, nile black nile.bl...@gmail.com wrote:
why i cann't see my post at group?
On Tue, Jul 28, 2009 at 11:48 AM, Nile Black nile.bl...@gmail.com wrote:
[INFO] Building Lift Utils
[INFO] task-segment: [install]
[INFO]
[INFO] [resources:resources]
[INFO] Using default encoding to copy filtered resources.
[INFO] [yuicompressor:compress {execution: default}]
[INFO] nb warnings: 0, nb errors: 0
[INFO] [compiler:compile]
[INFO] Nothing to compile - all classes are up to date
[INFO] [scala:compile {execution: default}]
[INFO] Checking for multiple versions of scala
[INFO] Compiling 37 source files to D:\user\liftweb\lift-util\target
\classes
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\ConcurrentLock.scala:16: error: value util is not a member of package
net.java
[WARNING] import java.util.concurrent.locks._
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\CurrencyZone.scala:69: error: value lang is not a member of package
net.java
[WARNING] } catch { case e: java.lang.NumberFormatException =
{
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\CurrencyZone.scala:72: error: value text is not a member of package
net.java
[WARNING] } catch { case e:
java.text.ParseException = {
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\CurrencyZone.scala:103: error: value math is not a member of package
net.java
[WARNING] make(new BigDecimal(this.amount.bigDecimal.divide
(that.amount.bigDecimal, scale, java.math.BigDecimal.ROUND_HALF_UP)) )
[WARNING]
^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\IOHelpers.scala:104: error: value io is not a member of package
net.java
[WARNING] def doClose[T](is: java.io.Closeable*)(f : = T): T = {
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\Mailer.scala:84: error: value util is not a member of package
net.java
[WARNING] import java.util.Properties
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\PCDataMarkupParser.scala:187: error: value io is not a member of
package net.java
[WARNING] import java.io.ByteArrayInputStream
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\Props.scala:178: error: value io is not a member of package net.java
[WARNING] import java.io.{ByteArrayInputStream}
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\Props.scala:179: error: value util is not a member of package
net.java
[WARNING] import java.util.InvalidPropertiesFormatException
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\SoftReferenceCache.scala:3: error: value lang is not a member of
package net.java
[WARNING] import java.lang.ref.{ReferenceQueue,SoftReference};
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\SoftReferenceCache.scala:4: error: value util is not a member of
package net.java
[WARNING] import java.util._
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\SoftReferenceCache.scala:147: error: wrong number of arguments for
constructor Object: ()jav
a.lang.Object
[WARNING] queue: ReferenceQueue[Any]) extends
SoftReference[V](v, queue) {
[WARNING] ^
[WARNING] D:\user\liftweb\lift-util\src\main\scala\net\liftweb\util
\TemplateCache.scala:17: error: value util is not a member of package
net.java
[WARNING] import java.util.{Locale}
[WARNING] ^
[WARNING] 13 errors found
[INFO]
[ERROR] BUILD FAILURE
[INFO]
[INFO] command line returned non-zero value:1
[INFO]
[INFO] For more information, run Maven with the -e switch
[INFO]
[Lift] scala+maven
Is there a good recourse on how to setup/use scala project with maven? I've installed maven that comes with lift. Project is created with Eclipse maven plugin (q4e http://code.google.com/p/q4e/). I build and install scala project to local repository fine. I can also run project using mvn scala:run command from project folder. Now I need to run project from repository and I cannot figure out how to do so. Would I need to use mvn scala:run? This will resolve dependencies and install all required libraries... Scala plugin is not recognized as it declared only in pom. I'm trying to update maven's settings.xml, adding this: profile idenv-dev/id repositories repository idscala-tools.org/id nameScala-tools Maven2 Repository/name urlhttp://scala-tools.org/repo-releases/url /repository /repositories pluginRepositories pluginRepository idorg.scala-tools/id nameScala-tools Maven2 Repository/name urlhttp://scala-tools.org/repo-releases/url /pluginRepository /pluginRepositories /profile /profiles activeProfiles activeProfileenv-dev/activeProfile /activeProfiles now if I run mvn scala:run -DmainClass=... it gives me error: [ERROR] BUILD ERROR [INFO] [INFO] The plugin 'org.apache.maven.plugins:maven-scala-plugin' does not exist or no valid version could be found Maybe there is another way to run project from maven repository? Next step for me will be installing artifact into private remote repository (Artifactory) and run project from that remote repository... Any suggestions? --~--~-~--~~~---~--~~ 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: Hear podcast interview with David Pollack about Lift
I had a great time on the podcast... the pondjumpers are a cool pair of dudes. On Mon, Jul 27, 2009 at 11:40 AM, Goldfish gregt...@mindspring.com wrote: Visit http://pondjumpers.com/2009/07/27/episode-2-interview-about-lift/ to hear a podcast interview with David Pollack about Lift. -- 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 --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
Re: Lift + Scala 2.8 (Was: Re: [Lift] Re: Is there any eclipse setup that actually works for lift?)
After we get the next milestone out the door, we'll focus more on the 2.8 parallel branch. I had a chat with Martin and it doesn't look like 2.8 is going to be out in September, so we've got time. On Fri, Jul 24, 2009 at 12:40 PM, Naftoli Gugenheim naftoli...@gmail.comwrote: The reason I asked is that paulp recently said he was going to try again to get scalacheck to work. - Jorge Ortizjorge.or...@gmail.com wrote: No, sorry. I haven't spent any more time on this. --j On Thu, Jul 23, 2009 at 10:13 PM, Naftoli Gugenheim naftoli...@gmail.com wrote: Any update on this? On Mon, Jun 22, 2009 at 10:55 PM, David Pollak feeder.of.the.be...@gmail.com wrote: On Mon, Jun 22, 2009 at 7:51 PM, Jorge Ortiz jorge.or...@gmail.com wrote: I just spent all afternoon trying to get stuff to compile with Scala 2.8. Since Lift depends on Specs, and Specs depends on Scalacheck, I started trying to port Scalacheck to 2.8 so I could port Specs to 2.8 so I could port Lift. It was unable to get Scalacheck to compile due to bugs which cause the compiler to choke and throw an exception. Apparently both paulp and Iulian have tried to compile Scalacheck with 2.8 before and failed. Giving up on Specs and Scalacheck, I decided to try to compile Lift (sans tests) with 2.8. After fixing some of the breaking changes that 2.8 introduces, I again ran into compiler troubles. In principle, with a lot of sleuthing I could figure out what code is causing the compiler to choke and give the compiler more type hints or whatever. Unfortunately this requires more work than I can put in today. Conclusion: 2.8 is basically unusable right now. (I'll check in my progress to GitHub later tonight or tomorrow.) Thanks for your hard work! --j On Mon, Jun 22, 2009 at 11:35 AM, David Pollak feeder.of.the.be...@gmail.com wrote: On Mon, Jun 22, 2009 at 11:25 AM, Ellis ellis.whiteh...@gmail.com wrote: Hello David, Thanks for your reply. Do you know whether lift *should* work with scala 2.8 when we pull it from the maven repositories? Lift currently only works with Scala 2.7.4. You can use Eclipse and 2.7.5 to edit Lift files, but Lift must be deployed against 2.7.4. We will have a branch of Lift (Jorge... you got this running yet) building against 2.8, but it will be experimental. I have experienced a fair number of suboptimalities with Lift and Eclipse in the last 3 weeks with the 2.7.5 stable plugin. I have had success recently with NetBeans, IntelliJ, and emacs. If so, then I'll try deleting my ~/.m2 as Tim suggested. Thanks, Ellis On Jun 22, 8:14 pm, David Pollak feeder.of.the.be...@gmail.com wrote: Ellis, Miles will be back online in a few days, but I suspect that the answer is that the 2.8 plugin is the new generation and the 2.7.5 stuff is going to have bugs. :-( Sorry. David On Mon, Jun 22, 2009 at 11:08 AM, Ellis ellis.whiteh...@gmail.com wrote: Hello everyone, Does anyone have a setup for eclipse that works like it should? By like it should, I mostly mean that the scala plugin doesn't crash regularly AND it works with lift/maven. If so, which versions of which plugins are you using? The nightly build of the scala plugin seems to work better than 2.7.4/2.7.5 in some ways, but I couldn't get it working with lift/ maven due to signature differences between the scala libraries. Best regards, Ellis -- Lift, the simply functional web frameworkhttp://liftweb.net Beginning Scalahttp://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 -- 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 --~--~-~--~~~---~--~~ 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: Modularization of Lift code
Tim, Here's a thought. GWT uses entry-point class=some fully qualified class name / to identify and initialize modules. Perhaps something similar could be hooked into LiftFilter and an entry point class identified in web.xml. There should be little objection to xml configuration, as opposed to using Java reflection. Glenn... On Jul 28, 9:36 am, Timothy Perrett timo...@getintheloop.eu wrote: Glenn, You have my full attention - this is something I've been sitting on for quite some time but just not quite sure what the best route forward is. When im creating these modules, I essentially just build a normal jar project with maven, and as you say, if I have JS or whatever that I need to use I just specify that with ResourceServer (in the module JAR init). To date I've not actually needed to pull a template from another JAR, but looking at ResourceServer.findResourceInClasspath I think it could do it... If memory serves DPP checked in a change to make this work about 2 weeks ago... In terms of having a defined loading pattern, its possible, but would need outlining with some very specific details... IMO, adding one line of code to Boot.scala is not a big deal so we would really need a good reason to add a bunch of reflection which can sometime feel like voodoo because its not clear what its loading and why (one of the reasons I went off ruby). Cheers, tim On 28/07/2009 17:00, glenn gl...@exmbly.com wrote: Hi, Tim, So, what you do is put all new LiftRules, Schemifier and ResourceServer stuff in an init function and run it after the Boot.scala defaults. Sounds simple enough. When creating your modules, do you just strip out all the stock webapp files (those that come with the maven lift archetypes), and put all your new resources in a toserve directory, then just jar it up? And what about any new template files? Where do those go in you module jars? You can't put them in the toserver directory. My understanding is that that would install them in the WEB-INF/classes directory of your final war file, when they need to go into the root webapp. I still see loose ends here. Also, what if you didn't have to modify Bool.scala for every module you add. Some hook function in an object that Boot.scala runs each time that would iterate through all your init functions that followed a pre- defined signature, would be a nice feature to add to Lift. Glenn... On Jul 27, 4:01 pm, Timothy Perrett timo...@getintheloop.eu wrote: Hi Glen... I actually do a lot of this - we have a product at work and i've just written a bunch of abstractions for work which just require me to do: MyLib.init In the boot file of a new application and then everything wires up - I couldn't think of anything more straightforward? The vast majority of stuff in lift is done with PF's, so you can pretty much just write them in external jars, and import them - my 3rd part stuff usually has a lift-webkit dependency so that I can just do the LiftRules.disptach.append stuff directly in the init method, but its really no biggy and saves boilerplate. So given your example, this scheme should work right? Cheers, Tim On Jul 27, 11:52 pm, glenn gl...@exmbly.com wrote: I'm interested in abstracting out useful features from my Lift applications for ease of reuse, but I haven't found an easy way to do it. I find myself creating a new Lift aplication for each feature, with all the baggage (bootstrapping, etc.), and I then have to do a lot of code modification to the application I'm adding the feature to in order to get it to work. For example, suppose I want to add role-based user login to an application that already has a User model just by dropping in a jar file with the new feature. I don't see how to do it without some boostrapping modifications. Has anyone really tried to modularize their Lift development. I'd be very interested in some suggestions. --~--~-~--~~~---~--~~ 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: Modularization of Lift code
Tim, My last post may be dismissed as adding more complication than simply editing Boot.scala. But keep in mind that a consistent, uniform and robust procedure for modularization across the Lift universe is to be favored over the ad-hoc approach, as exists now. In my view, opening a project and editing source files should always be a last-resort option. Glenn... On Jul 28, 9:36 am, Timothy Perrett timo...@getintheloop.eu wrote: Glenn, You have my full attention - this is something I've been sitting on for quite some time but just not quite sure what the best route forward is. When im creating these modules, I essentially just build a normal jar project with maven, and as you say, if I have JS or whatever that I need to use I just specify that with ResourceServer (in the module JAR init). To date I've not actually needed to pull a template from another JAR, but looking at ResourceServer.findResourceInClasspath I think it could do it... If memory serves DPP checked in a change to make this work about 2 weeks ago... In terms of having a defined loading pattern, its possible, but would need outlining with some very specific details... IMO, adding one line of code to Boot.scala is not a big deal so we would really need a good reason to add a bunch of reflection which can sometime feel like voodoo because its not clear what its loading and why (one of the reasons I went off ruby). Cheers, tim On 28/07/2009 17:00, glenn gl...@exmbly.com wrote: Hi, Tim, So, what you do is put all new LiftRules, Schemifier and ResourceServer stuff in an init function and run it after the Boot.scala defaults. Sounds simple enough. When creating your modules, do you just strip out all the stock webapp files (those that come with the maven lift archetypes), and put all your new resources in a toserve directory, then just jar it up? And what about any new template files? Where do those go in you module jars? You can't put them in the toserver directory. My understanding is that that would install them in the WEB-INF/classes directory of your final war file, when they need to go into the root webapp. I still see loose ends here. Also, what if you didn't have to modify Bool.scala for every module you add. Some hook function in an object that Boot.scala runs each time that would iterate through all your init functions that followed a pre- defined signature, would be a nice feature to add to Lift. Glenn... On Jul 27, 4:01 pm, Timothy Perrett timo...@getintheloop.eu wrote: Hi Glen... I actually do a lot of this - we have a product at work and i've just written a bunch of abstractions for work which just require me to do: MyLib.init In the boot file of a new application and then everything wires up - I couldn't think of anything more straightforward? The vast majority of stuff in lift is done with PF's, so you can pretty much just write them in external jars, and import them - my 3rd part stuff usually has a lift-webkit dependency so that I can just do the LiftRules.disptach.append stuff directly in the init method, but its really no biggy and saves boilerplate. So given your example, this scheme should work right? Cheers, Tim On Jul 27, 11:52 pm, glenn gl...@exmbly.com wrote: I'm interested in abstracting out useful features from my Lift applications for ease of reuse, but I haven't found an easy way to do it. I find myself creating a new Lift aplication for each feature, with all the baggage (bootstrapping, etc.), and I then have to do a lot of code modification to the application I'm adding the feature to in order to get it to work. For example, suppose I want to add role-based user login to an application that already has a User model just by dropping in a jar file with the new feature. I don't see how to do it without some boostrapping modifications. Has anyone really tried to modularize their Lift development. I'd be very interested in some suggestions. --~--~-~--~~~---~--~~ 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: Modularization of Lift code
Hi, Ross, So, with the changes, where would templates need to be placed in jar files in order to be found - or can they be put in any directory as long as the resource is noted in ResourceServer? Glenn... On Jul 28, 9:39 am, Ross Mellgren dri...@gmail.com wrote: http://github.com/dpp/liftweb/commit/0f60807dd64b7fe1430919738b46f2eb... ... From: feeder.of.the.be...@gmail.com Subject: [Lift] Re: ResourceServer problem Date: July 22, 2009 12:07:14 PM EDT To: liftweb@googlegroups.com Reply-To: liftweb@googlegroups.com On Tue, Jul 21, 2009 at 9:55 PM, Naftoli Gugenheim naftoli...@gmail.com wrote: Now a direct call to ResourceServer does work, but the template is still not being found. Any ideas? Templates are looked up simply by using the ServletContainer Context's resource locator. I've expanded the lookup process so that stuff in JAR files will be found. I'll commit the changes up in 10 minutes or so. -Ross On Jul 28, 2009, at 12:36 PM, Timothy Perrett wrote: Glenn, You have my full attention - this is something I've been sitting on for quite some time but just not quite sure what the best route forward is. When im creating these modules, I essentially just build a normal jar project with maven, and as you say, if I have JS or whatever that I need to use I just specify that with ResourceServer (in the module JAR init). To date I've not actually needed to pull a template from another JAR, but looking at ResourceServer.findResourceInClasspath I think it could do it... If memory serves DPP checked in a change to make this work about 2 weeks ago... In terms of having a defined loading pattern, its possible, but would need outlining with some very specific details... IMO, adding one line of code to Boot.scala is not a big deal so we would really need a good reason to add a bunch of reflection which can sometime feel like voodoo because its not clear what its loading and why (one of the reasons I went off ruby). Cheers, tim On 28/07/2009 17:00, glenn gl...@exmbly.com wrote: Hi, Tim, So, what you do is put all new LiftRules, Schemifier and ResourceServer stuff in an init function and run it after the Boot.scala defaults. Sounds simple enough. When creating your modules, do you just strip out all the stock webapp files (those that come with the maven lift archetypes), and put all your new resources in a toserve directory, then just jar it up? And what about any new template files? Where do those go in you module jars? You can't put them in the toserver directory. My understanding is that that would install them in the WEB-INF/classes directory of your final war file, when they need to go into the root webapp. I still see loose ends here. Also, what if you didn't have to modify Bool.scala for every module you add. Some hook function in an object that Boot.scala runs each time that would iterate through all your init functions that followed a pre- defined signature, would be a nice feature to add to Lift. Glenn... On Jul 27, 4:01 pm, Timothy Perrett timo...@getintheloop.eu wrote: Hi Glen... I actually do a lot of this - we have a product at work and i've just written a bunch of abstractions for work which just require me to do: MyLib.init In the boot file of a new application and then everything wires up - I couldn't think of anything more straightforward? The vast majority of stuff in lift is done with PF's, so you can pretty much just write them in external jars, and import them - my 3rd part stuff usually has a lift-webkit dependency so that I can just do the LiftRules.disptach.append stuff directly in the init method, but its really no biggy and saves boilerplate. So given your example, this scheme should work right? Cheers, Tim On Jul 27, 11:52 pm, glenn gl...@exmbly.com wrote: I'm interested in abstracting out useful features from my Lift applications for ease of reuse, but I haven't found an easy way to do it. I find myself creating a new Lift aplication for each feature, with all the baggage (bootstrapping, etc.), and I then have to do a lot of code modification to the application I'm adding the feature to in order to get it to work. For example, suppose I want to add role-based user login to an application that already has a User model just by dropping in a jar file with the new feature. I don't see how to do it without some boostrapping modifications. Has anyone really tried to modularize their Lift development. I'd be very interested in some suggestions. --~--~-~--~~~---~--~~ 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
[Lift] Re: Modularization of Lift code
I've been having a think about this, and are we overlooking something stupid here? Perhaps OSGi could yield a good solution? Thoughts? Cheers, Tim On 28/07/2009 20:04, glenn gl...@exmbly.com wrote: Tim, My last post may be dismissed as adding more complication than simply editing Boot.scala. But keep in mind that a consistent, uniform and robust procedure for modularization across the Lift universe is to be favored over the ad-hoc approach, as exists now. In my view, opening a project and editing source files should always be a last-resort option. Glenn... On Jul 28, 9:36 am, Timothy Perrett timo...@getintheloop.eu wrote: Glenn, You have my full attention - this is something I've been sitting on for quite some time but just not quite sure what the best route forward is. When im creating these modules, I essentially just build a normal jar project with maven, and as you say, if I have JS or whatever that I need to use I just specify that with ResourceServer (in the module JAR init). To date I've not actually needed to pull a template from another JAR, but looking at ResourceServer.findResourceInClasspath I think it could do it... If memory serves DPP checked in a change to make this work about 2 weeks ago... In terms of having a defined loading pattern, its possible, but would need outlining with some very specific details... IMO, adding one line of code to Boot.scala is not a big deal so we would really need a good reason to add a bunch of reflection which can sometime feel like voodoo because its not clear what its loading and why (one of the reasons I went off ruby). Cheers, tim On 28/07/2009 17:00, glenn gl...@exmbly.com wrote: Hi, Tim, So, what you do is put all new LiftRules, Schemifier and ResourceServer stuff in an init function and run it after the Boot.scala defaults. Sounds simple enough. When creating your modules, do you just strip out all the stock webapp files (those that come with the maven lift archetypes), and put all your new resources in a toserve directory, then just jar it up? And what about any new template files? Where do those go in you module jars? You can't put them in the toserver directory. My understanding is that that would install them in the WEB-INF/classes directory of your final war file, when they need to go into the root webapp. I still see loose ends here. Also, what if you didn't have to modify Bool.scala for every module you add. Some hook function in an object that Boot.scala runs each time that would iterate through all your init functions that followed a pre- defined signature, would be a nice feature to add to Lift. Glenn... On Jul 27, 4:01 pm, Timothy Perrett timo...@getintheloop.eu wrote: Hi Glen... I actually do a lot of this - we have a product at work and i've just written a bunch of abstractions for work which just require me to do: MyLib.init In the boot file of a new application and then everything wires up - I couldn't think of anything more straightforward? The vast majority of stuff in lift is done with PF's, so you can pretty much just write them in external jars, and import them - my 3rd part stuff usually has a lift-webkit dependency so that I can just do the LiftRules.disptach.append stuff directly in the init method, but its really no biggy and saves boilerplate. So given your example, this scheme should work right? Cheers, Tim On Jul 27, 11:52 pm, glenn gl...@exmbly.com wrote: I'm interested in abstracting out useful features from my Lift applications for ease of reuse, but I haven't found an easy way to do it. I find myself creating a new Lift aplication for each feature, with all the baggage (bootstrapping, etc.), and I then have to do a lot of code modification to the application I'm adding the feature to in order to get it to work. For example, suppose I want to add role-based user login to an application that already has a User model just by dropping in a jar file with the new feature. I don't see how to do it without some boostrapping modifications. Has anyone really tried to modularize their Lift development. I'd be very interested in some suggestions. --~--~-~--~~~---~--~~ 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: Modularization of Lift code
If the xml is in the jar file then it would only require the user of the library to drop thr jar in. It would only be an extra step for the library author. The question is whether the extra line saved in Boot is worth the time it takes for Lift to search the jars whenever you deploy. - glenngl...@exmbly.com wrote: Tim, My last post may be dismissed as adding more complication than simply editing Boot.scala. But keep in mind that a consistent, uniform and robust procedure for modularization across the Lift universe is to be favored over the ad-hoc approach, as exists now. In my view, opening a project and editing source files should always be a last-resort option. Glenn... On Jul 28, 9:36 am, Timothy Perrett timo...@getintheloop.eu wrote: Glenn, You have my full attention - this is something I've been sitting on for quite some time but just not quite sure what the best route forward is. When im creating these modules, I essentially just build a normal jar project with maven, and as you say, if I have JS or whatever that I need to use I just specify that with ResourceServer (in the module JAR init). To date I've not actually needed to pull a template from another JAR, but looking at ResourceServer.findResourceInClasspath I think it could do it... If memory serves DPP checked in a change to make this work about 2 weeks ago... In terms of having a defined loading pattern, its possible, but would need outlining with some very specific details... IMO, adding one line of code to Boot.scala is not a big deal so we would really need a good reason to add a bunch of reflection which can sometime feel like voodoo because its not clear what its loading and why (one of the reasons I went off ruby). Cheers, tim On 28/07/2009 17:00, glenn gl...@exmbly.com wrote: Hi, Tim, So, what you do is put all new LiftRules, Schemifier and ResourceServer stuff in an init function and run it after the Boot.scala defaults. Sounds simple enough. When creating your modules, do you just strip out all the stock webapp files (those that come with the maven lift archetypes), and put all your new resources in a toserve directory, then just jar it up? And what about any new template files? Where do those go in you module jars? You can't put them in the toserver directory. My understanding is that that would install them in the WEB-INF/classes directory of your final war file, when they need to go into the root webapp. I still see loose ends here. Also, what if you didn't have to modify Bool.scala for every module you add. Some hook function in an object that Boot.scala runs each time that would iterate through all your init functions that followed a pre- defined signature, would be a nice feature to add to Lift. Glenn... On Jul 27, 4:01 pm, Timothy Perrett timo...@getintheloop.eu wrote: Hi Glen... I actually do a lot of this - we have a product at work and i've just written a bunch of abstractions for work which just require me to do: MyLib.init In the boot file of a new application and then everything wires up - I couldn't think of anything more straightforward? The vast majority of stuff in lift is done with PF's, so you can pretty much just write them in external jars, and import them - my 3rd part stuff usually has a lift-webkit dependency so that I can just do the LiftRules.disptach.append stuff directly in the init method, but its really no biggy and saves boilerplate. So given your example, this scheme should work right? Cheers, Tim On Jul 27, 11:52 pm, glenn gl...@exmbly.com wrote: I'm interested in abstracting out useful features from my Lift applications for ease of reuse, but I haven't found an easy way to do it. I find myself creating a new Lift aplication for each feature, with all the baggage (bootstrapping, etc.), and I then have to do a lot of code modification to the application I'm adding the feature to in order to get it to work. For example, suppose I want to add role-based user login to an application that already has a User model just by dropping in a jar file with the new feature. I don't see how to do it without some boostrapping modifications. Has anyone really tried to modularize their Lift development. I'd be very interested in some suggestions. --~--~-~--~~~---~--~~ 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: Modularization of Lift code
It's not related to ResourceServer. Just use the jar-relative path in the embed tag etc. - glenngl...@exmbly.com wrote: Hi, Ross, So, with the changes, where would templates need to be placed in jar files in order to be found - or can they be put in any directory as long as the resource is noted in ResourceServer? Glenn... On Jul 28, 9:39 am, Ross Mellgren dri...@gmail.com wrote: http://github.com/dpp/liftweb/commit/0f60807dd64b7fe1430919738b46f2eb... ... From: feeder.of.the.be...@gmail.com Subject: [Lift] Re: ResourceServer problem Date: July 22, 2009 12:07:14 PM EDT To: liftweb@googlegroups.com Reply-To: liftweb@googlegroups.com On Tue, Jul 21, 2009 at 9:55 PM, Naftoli Gugenheim naftoli...@gmail.com wrote: Now a direct call to ResourceServer does work, but the template is still not being found. Any ideas? Templates are looked up simply by using the ServletContainer Context's resource locator. I've expanded the lookup process so that stuff in JAR files will be found. I'll commit the changes up in 10 minutes or so. -Ross On Jul 28, 2009, at 12:36 PM, Timothy Perrett wrote: Glenn, You have my full attention - this is something I've been sitting on for quite some time but just not quite sure what the best route forward is. When im creating these modules, I essentially just build a normal jar project with maven, and as you say, if I have JS or whatever that I need to use I just specify that with ResourceServer (in the module JAR init). To date I've not actually needed to pull a template from another JAR, but looking at ResourceServer.findResourceInClasspath I think it could do it... If memory serves DPP checked in a change to make this work about 2 weeks ago... In terms of having a defined loading pattern, its possible, but would need outlining with some very specific details... IMO, adding one line of code to Boot.scala is not a big deal so we would really need a good reason to add a bunch of reflection which can sometime feel like voodoo because its not clear what its loading and why (one of the reasons I went off ruby). Cheers, tim On 28/07/2009 17:00, glenn gl...@exmbly.com wrote: Hi, Tim, So, what you do is put all new LiftRules, Schemifier and ResourceServer stuff in an init function and run it after the Boot.scala defaults. Sounds simple enough. When creating your modules, do you just strip out all the stock webapp files (those that come with the maven lift archetypes), and put all your new resources in a toserve directory, then just jar it up? And what about any new template files? Where do those go in you module jars? You can't put them in the toserver directory. My understanding is that that would install them in the WEB-INF/classes directory of your final war file, when they need to go into the root webapp. I still see loose ends here. Also, what if you didn't have to modify Bool.scala for every module you add. Some hook function in an object that Boot.scala runs each time that would iterate through all your init functions that followed a pre- defined signature, would be a nice feature to add to Lift. Glenn... On Jul 27, 4:01 pm, Timothy Perrett timo...@getintheloop.eu wrote: Hi Glen... I actually do a lot of this - we have a product at work and i've just written a bunch of abstractions for work which just require me to do: MyLib.init In the boot file of a new application and then everything wires up - I couldn't think of anything more straightforward? The vast majority of stuff in lift is done with PF's, so you can pretty much just write them in external jars, and import them - my 3rd part stuff usually has a lift-webkit dependency so that I can just do the LiftRules.disptach.append stuff directly in the init method, but its really no biggy and saves boilerplate. So given your example, this scheme should work right? Cheers, Tim On Jul 27, 11:52 pm, glenn gl...@exmbly.com wrote: I'm interested in abstracting out useful features from my Lift applications for ease of reuse, but I haven't found an easy way to do it. I find myself creating a new Lift aplication for each feature, with all the baggage (bootstrapping, etc.), and I then have to do a lot of code modification to the application I'm adding the feature to in order to get it to work. For example, suppose I want to add role-based user login to an application that already has a User model just by dropping in a jar file with the new feature. I don't see how to do it without some boostrapping modifications. Has anyone really tried to modularize their Lift development. I'd be very interested in some suggestions. --~--~-~--~~~---~--~~ You received this message because you
[Lift] Re: Modularization of Lift code
Im just spitballing - I knew Heiko was working on a bunch of modules and such for Lift so wondered if it was possibly a route forward (im not really up to speed with OSGi) Cheers, Tim On Jul 28, 8:20 pm, glenn gl...@exmbly.com wrote: My understanding about OSGi is that is allows for dynamic classpath dependencies through a jar's META-INF file. But wouldn't that require launching an OSGi implementation with your main Lift application. Glenn... On Jul 28, 12:11 pm, Timothy Perrett timo...@getintheloop.eu wrote: I've been having a think about this, and are we overlooking something stupid here? Perhaps OSGi could yield a good solution? Thoughts? Cheers, Tim On 28/07/2009 20:04, glenn gl...@exmbly.com wrote: Tim, My last post may be dismissed as adding more complication than simply editing Boot.scala. But keep in mind that a consistent, uniform and robust procedure for modularization across the Lift universe is to be favored over the ad-hoc approach, as exists now. In my view, opening a project and editing source files should always be a last-resort option. Glenn... On Jul 28, 9:36 am, Timothy Perrett timo...@getintheloop.eu wrote: Glenn, You have my full attention - this is something I've been sitting on for quite some time but just not quite sure what the best route forward is. When im creating these modules, I essentially just build a normal jar project with maven, and as you say, if I have JS or whatever that I need to use I just specify that with ResourceServer (in the module JAR init). To date I've not actually needed to pull a template from another JAR, but looking at ResourceServer.findResourceInClasspath I think it could do it... If memory serves DPP checked in a change to make this work about 2 weeks ago... In terms of having a defined loading pattern, its possible, but would need outlining with some very specific details... IMO, adding one line of code to Boot.scala is not a big deal so we would really need a good reason to add a bunch of reflection which can sometime feel like voodoo because its not clear what its loading and why (one of the reasons I went off ruby). Cheers, tim On 28/07/2009 17:00, glenn gl...@exmbly.com wrote: Hi, Tim, So, what you do is put all new LiftRules, Schemifier and ResourceServer stuff in an init function and run it after the Boot.scala defaults. Sounds simple enough. When creating your modules, do you just strip out all the stock webapp files (those that come with the maven lift archetypes), and put all your new resources in a toserve directory, then just jar it up? And what about any new template files? Where do those go in you module jars? You can't put them in the toserver directory. My understanding is that that would install them in the WEB-INF/classes directory of your final war file, when they need to go into the root webapp. I still see loose ends here. Also, what if you didn't have to modify Bool.scala for every module you add. Some hook function in an object that Boot.scala runs each time that would iterate through all your init functions that followed a pre- defined signature, would be a nice feature to add to Lift. Glenn... On Jul 27, 4:01 pm, Timothy Perrett timo...@getintheloop.eu wrote: Hi Glen... I actually do a lot of this - we have a product at work and i've just written a bunch of abstractions for work which just require me to do: MyLib.init In the boot file of a new application and then everything wires up - I couldn't think of anything more straightforward? The vast majority of stuff in lift is done with PF's, so you can pretty much just write them in external jars, and import them - my 3rd part stuff usually has a lift-webkit dependency so that I can just do the LiftRules.disptach.append stuff directly in the init method, but its really no biggy and saves boilerplate. So given your example, this scheme should work right? Cheers, Tim On Jul 27, 11:52 pm, glenn gl...@exmbly.com wrote: I'm interested in abstracting out useful features from my Lift applications for ease of reuse, but I haven't found an easy way to do it. I find myself creating a new Lift aplication for each feature, with all the baggage (bootstrapping, etc.), and I then have to do a lot of code modification to the application I'm adding the feature to in order to get it to work. For example, suppose I want to add role-based user login to an application that already has a User model just by dropping in a jar file with the new feature. I don't see how to do it without some boostrapping modifications. Has anyone really tried to modularize their Lift development. I'd be very interested in some suggestions. --~--~-~--~~~---~--~~ You received this
[Lift] Re: scala+maven
Hey there, I wrote an article previously about how to use launchers with maven- scala-plugin, find it here: http://is.gd/1RuLQ Does that help? Cheers, Tim On Jul 28, 7:32 pm, ph pkirsa...@gmail.com wrote: Is there a good recourse on how to setup/use scala project with maven? I've installed maven that comes with lift. Project is created with Eclipse maven plugin (q4ehttp://code.google.com/p/q4e/). I build and install scala project to local repository fine. I can also run project using mvn scala:run command from project folder. Now I need to run project from repository and I cannot figure out how to do so. Would I need to use mvn scala:run? This will resolve dependencies and install all required libraries... Scala plugin is not recognized as it declared only in pom. I'm trying to update maven's settings.xml, adding this: profile idenv-dev/id repositories repository idscala-tools.org/id nameScala-tools Maven2 Repository/name urlhttp://scala-tools.org/repo-releases/url /repository /repositories pluginRepositories pluginRepository idorg.scala-tools/id nameScala-tools Maven2 Repository/name urlhttp://scala-tools.org/repo-releases/url /pluginRepository /pluginRepositories /profile /profiles activeProfiles activeProfileenv-dev/activeProfile /activeProfiles now if I run mvn scala:run -DmainClass=... it gives me error: [ERROR] BUILD ERROR [INFO] [INFO] The plugin 'org.apache.maven.plugins:maven-scala-plugin' does not exist or no valid version could be found Maybe there is another way to run project from maven repository? Next step for me will be installing artifact into private remote repository (Artifactory) and run project from that remote repository... Any suggestions? --~--~-~--~~~---~--~~ 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: Modularization of Lift code
The jar should be in lib I guess, and use the path relative to the jar file (the path in the jar). I added /tableeditor/default.html to lift-mapper.jar, so you would include it with lift:embed what=/tableeditor/default . - glenngl...@exmbly.com wrote: Say I just wanted to open the template, tmpl.html in my module's jar file. Since it's not in the webapp directory, what would the link have to look like in my sitemap menu? Glenn Sent from my Verizon Wireless BlackBerry -Original Message- From: Naftoli Gugenheim naftoli...@gmail.com Date: Tue, 28 Jul 2009 12:17:44 To: gl...@exmbly.com; liftweb@googlegroups.com Subject: Re: [Lift] Re: Modularization of Lift code It's not related to ResourceServer. Just use the jar-relative path in the embed tag etc. - glenngl...@exmbly.com wrote: Hi, Ross, So, with the changes, where would templates need to be placed in jar files in order to be found - or can they be put in any directory as long as the resource is noted in ResourceServer? Glenn... On Jul 28, 9:39 am, Ross Mellgren dri...@gmail.com wrote: http://github.com/dpp/liftweb/commit/0f60807dd64b7fe1430919738b46f2eb... ... From: feeder.of.the.be...@gmail.com Subject: [Lift] Re: ResourceServer problem Date: July 22, 2009 12:07:14 PM EDT To: liftweb@googlegroups.com Reply-To: liftweb@googlegroups.com On Tue, Jul 21, 2009 at 9:55 PM, Naftoli Gugenheim naftoli...@gmail.com wrote: Now a direct call to ResourceServer does work, but the template is still not being found. Any ideas? Templates are looked up simply by using the ServletContainer Context's resource locator. I've expanded the lookup process so that stuff in JAR files will be found. I'll commit the changes up in 10 minutes or so. -Ross On Jul 28, 2009, at 12:36 PM, Timothy Perrett wrote: Glenn, You have my full attention - this is something I've been sitting on for quite some time but just not quite sure what the best route forward is. When im creating these modules, I essentially just build a normal jar project with maven, and as you say, if I have JS or whatever that I need to use I just specify that with ResourceServer (in the module JAR init). To date I've not actually needed to pull a template from another JAR, but looking at ResourceServer.findResourceInClasspath I think it could do it... If memory serves DPP checked in a change to make this work about 2 weeks ago... In terms of having a defined loading pattern, its possible, but would need outlining with some very specific details... IMO, adding one line of code to Boot.scala is not a big deal so we would really need a good reason to add a bunch of reflection which can sometime feel like voodoo because its not clear what its loading and why (one of the reasons I went off ruby). Cheers, tim On 28/07/2009 17:00, glenn gl...@exmbly.com wrote: Hi, Tim, So, what you do is put all new LiftRules, Schemifier and ResourceServer stuff in an init function and run it after the Boot.scala defaults. Sounds simple enough. When creating your modules, do you just strip out all the stock webapp files (those that come with the maven lift archetypes), and put all your new resources in a toserve directory, then just jar it up? And what about any new template files? Where do those go in you module jars? You can't put them in the toserver directory. My understanding is that that would install them in the WEB-INF/classes directory of your final war file, when they need to go into the root webapp. I still see loose ends here. Also, what if you didn't have to modify Bool.scala for every module you add. Some hook function in an object that Boot.scala runs each time that would iterate through all your init functions that followed a pre- defined signature, would be a nice feature to add to Lift. Glenn... On Jul 27, 4:01 pm, Timothy Perrett timo...@getintheloop.eu wrote: Hi Glen... I actually do a lot of this - we have a product at work and i've just written a bunch of abstractions for work which just require me to do: MyLib.init In the boot file of a new application and then everything wires up - I couldn't think of anything more straightforward? The vast majority of stuff in lift is done with PF's, so you can pretty much just write them in external jars, and import them - my 3rd part stuff usually has a lift-webkit dependency so that I can just do the LiftRules.disptach.append stuff directly in the init method, but its really no biggy and saves boilerplate. So given your example, this scheme should work right? Cheers, Tim On Jul 27, 11:52 pm, glenn gl...@exmbly.com wrote: I'm interested in abstracting out useful features from my Lift applications for ease of reuse, but I
[Lift] Re: New features
In the meantime, if there are any scaladoc comments that could be improved or clarified, please tell me! - marius d.marius.dan...@gmail.com wrote: Would you please add some examples on the wiki so that people can actually visualize how these things can be used? As far as XmlMenu goes why do we want to express menus as xml ? Br's, Marius On Jul 27, 10:57 pm, Naftoli Gugenheim naftoli...@gmail.com wrote: I committed some code last night, which can help building mapper-based view snippets, with G-d's help. It includes the following classes: (1-2) net.liftweb.mapper.OneToMany, ManyToMany: Gives a more object-oriented approach to managing related entites. You can manage the many side of a 1-n and n-n as a mutable collection of children, and the parent of a child can be set directly, instead of via its id. And the children are not saved to the database when you add them until you call save on it or its parent, nor deleted when you remove tem until you call delete_!, which is very helpful when you need to keep track of adds/removes through multiple requests. For example, if you are displaying a list and you can click delete, but it shouldn't be permanently deleted until you click save. There is a new package, ...mapper.view, which contains a number of utilities for mapper-based views: (3-4) ModelView and ModelSnippet provide a number of building blocks for views that are too complex to CRUDify. Inherit ModelSnippet (which extends StatefulSnippet) and wrap your entities in ModelView (view is used in the sense of a wrapper). (5) Util provides some more building blocks that just be imported, without needing a ModelSnippet context. (6-7) Paginator makes it easy to create paginated, user sortable listings. You can use PaginatedSnippet instead of ModelSnippet to help. (8-10) ItemsList lets you manage a list of entities with pending additions and deletions. It's used by TableEditor, which is a very easy to use and customizable snippet to edit tables directly. It's useful for editing short lists, e.g., a lookup table like cities. Don't forget to register the table in Boot. (11) Then there's the experimental FormProcessor, if you need your form to be processed in one block instead of separate closures, e.g., to surround with try. (12) Also experimental is sitemap.XmlMenu which lets you write menus in xml. (13) I may add CaseEnum, which lets you write case classes that automatically double as an Enumeration. Questions, comments, suggestions, and constructive criticism are more than welcome! 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: Modularization of Lift code
Hey Naftoli, Lift has a general aversion to xml configs... Is there another route? Cheers, Tim On 28/07/2009 20:47, Naftoli Gugenheim naftoli...@gmail.com wrote: What I was suggesting is that instead of having to write Lib.init in Boot, Lift should look in Lib.jar for say /boot.xml which would tell Lift to execute Lib.init for you on startup. I think that would accomplish what you want, at the cost of lift searching through the jars. --~--~-~--~~~---~--~~ 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] Moving the wiki...
Hey guys, We had a discussion within the team and taken the decision to move to the github wiki - a fresh start for a fresh new wiki with lots of up- to-date information to replace our legacy wiki / documentation. I've started to move stuff across and supply some brand new documentation, do take a look and let us know what you think - Xavi has very kindly volunteered to be the wiki gardener so kudos for him giving us a kick to actually fix the documentation and make the learning curve for Lift far smoother. http://wiki.github.com/dpp/liftweb Cheers Tim --~--~-~--~~~---~--~~ 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] User validation by admin
Hi. I would like to customize the way that user registration is validated by email. For example, require the admin to validate users. Here are some possible approaches: 1. Set skipEmailValidation to true and build the mechanism from scratch in the subclass. 2. Override signup, and implement it similar but different. 3. Add a flag to lift to leave the user NOT validated, but not to send the email. Then either send the email manually, or provide a way for the admin to validate users. 4. Provide a hook to directly specify who the email should go to. What do people think? --~--~-~--~~~---~--~~ 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: Hear podcast interview with David Pollack about Lift
Cheers! That was a great podcast! On Jul 28, 11:48 am, David Pollak feeder.of.the.be...@gmail.com wrote: I had a great time on the podcast... the pondjumpers are a cool pair of dudes. On Mon, Jul 27, 2009 at 11:40 AM, Goldfish gregt...@mindspring.com wrote: Visithttp://pondjumpers.com/2009/07/27/episode-2-interview-about-lift/ to hear a podcast interview with David Pollack about Lift. -- Lift, the simply functional web frameworkhttp://liftweb.net Beginning Scalahttp://www.apress.com/book/view/1430219890 Follow me:http://twitter.com/dpp Git some:http://github.com/dpp --~--~-~--~~~---~--~~ 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: Automatic background AJAX: best way to do it?
I would do the first option, which I don't see as 'unLifty', but perhaps someone who knows Lift better than I do can comment on your options. Peter Robinett On Jul 28, 10:57 am, Nolan Darilek no...@thewordnerd.info wrote: I have a project that will use the geolocation API in Firefox 3.5, Google Gears and other JS frameworks. It will need to keep the user's position updated using the watchPosition API, fetching nearby POIs and such whenever the position changes. I'm actually fairly new to AJAX, and am trying to figure out the best way to do this. Most of the AJAX examples I've seen involve user interaction, such as entering into a text field than removing focus, or waiting on state updates, as with comet. In this case, there's state that may update often or never, and those updates will be triggered by a callback function in the background, with no user interaction into which I can hook. I also don't want to leave a Comet connection open to the app waiting on updates, since the app may see mobile use, and I can't imagine holding open a connection being great for battery life. I'm wondering what the best way to do this would be, while staying fairly close to what Lift offers? Thus far I have two options. 1. Create a REST API and have the Javascript call a specified URL whenever the position changes, inserting the resulting JSON into the page at appropriate places. This works, but seems like it'd involve lots of extra effort, as well as straying away from Lift/Scala's added benefits into the dynamicity of JS, which I'm not entirely comfortable with. 2. Create a hidden JSON form on the page. When the position changes, the JS callback function fills out and submits the form in the background. This seems a bit hackish, with the hidden form and all, but this makes the problem one that is on a bit less shaky Lift ground. I can then use Lift's provided functionality to generate JS for replacing page contents with the results of evaluating the form submission. I'm basically going from the Lift book here. Most ideal, I'd think, would be if there was some way to have my callback function call a snippet directly and be handed back the JS needed, without having to create a separate web service API for this one call. Is the JSON form method the best option here? Or is there some new shiny in 1.1 that isn't documented in the Lift book yet? (or perhaps it *is* documented and I'm just missing it. :) Thanks. -- Nolan Darilekhttp://thewordnerd.info --~--~-~--~~~---~--~~ 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: Mapper and Primary Keys
Sorry to bump this, but does anyone have any idea why my mac column is
not being saved to the database, despite the save method returning
true?
On Jul 22, 9:19 am, Peter Robinett pe...@bubblefoundry.com wrote:
Because it's unique across systems and maps directly to hardware I'm
tracking. But thanks for the equations!
Peter
On Jul 21, 7:20 pm, jon jonhoff...@gmail.com wrote:
This doesn't address your question, so I'll apologize in advance, but
why do you want to use a mac address as a primary key? Also, a mac
address represents six bytes, why not pack into a long? This probably
isn't the most efficient or prettiest way:
def macToLong(mac: String) = java.lang.Long.parseLong(mac.replace
(:,),16)
def longToMac(mac: Long) = (0 to 5).reverse.map( i = (mac ((0xff)
(i * 8).asInstanceOf[Long])) (i * 8)).
map( l = String.format(%02x,l.asInstanceOf[Object])).mkString
(:)
println( longToMac(macToLong(00:1d:c9:00:04:9f)))
On Jul 21, 4:19 pm, Peter Robinett pe...@bubblefoundry.com wrote:
I should add that I believe this is because the field isn't being
marked as dirty and so isn't saved. This is in MappedField:
def dirty_? = !dbPrimaryKey_? _dirty_?
How would I overload it in my object mac definition?
Thanks,
Peter
On Jul 21, 12:30 pm, Peter Robinett pe...@bubblefoundry.com wrote:
Thanks Derek, but unfortunately it only works halfway: I am able to
set MAC address of my new Node and save it (returning true) and my
MySQL database row is created, but the mac column is null.
Peter
On Jul 21, 7:58 am, Derek Chen-Becker dchenbec...@gmail.com wrote:
I think that this should work, but I haven't tested it:
class Node extends KeyedMapper[String, Node] {
def getSingleton = Node
/* MAC address as primary key */
def primaryKeyField = mac
object mac extends MappedStringIndex(this, 17) {
override def writePermission_? = true
override def dbDisplay_? = true
}
}
Note that primaryKey_? is already set to true in MappedStringIndex.
writePermission_? is set to false by default...
Derek
On Mon, Jul 20, 2009 at 7:30 PM, Peter Robinett
pe...@bubblefoundry.comwrote:
Hi all,
I'm using Mapper with MAC addresses as my primary keys:
class Node extends KeyedMapper[String, Node] {
def getSingleton = Node
/* MAC address as primary key */
def primaryKeyField = mac
object mac extends MappedStringIndex(this, 17) {
override def dbPrimaryKey_? = true
override def dbDisplay_? = true
}
}
Unfortunately, if I try to create a new Node and assign a MAC
address,
I get an error saying that I don't have permission:
scala Node.create.mac(00:1d:c9:00:04:9f)
java.lang.Exception: Do not have permissions to set this field
at
net.liftweb.mapper.MappedField$class.set(MappedField.scala:425)
at net.liftweb.mapper.MappedString.set(MappedString.scala:38)
at net.liftweb.mapper.MappedString$$anonfun$apply$6.apply
(MappedString.scala:121)
at net.liftweb.mapper.MappedString$$anonfun$apply$6.apply
(MappedString.scala:121)
at net.liftweb.util.Full.f...
How do I go about creating a new Node with the mac address – the
primary key – of my choosing?
Thanks,
Peter Robinett
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[Lift] Re: scala+maven
Maybe better question would be: How to run scala artifact from maven repository (local and/or private remote)? On Jul 28, 3:28 pm, Timothy Perrett timo...@getintheloop.eu wrote: Hey there, I wrote an article previously about how to use launchers with maven- scala-plugin, find it here:http://is.gd/1RuLQ Does that help? Cheers, Tim On Jul 28, 7:32 pm, ph pkirsa...@gmail.com wrote: Is there a good recourse on how to setup/use scala project with maven? I've installed maven that comes with lift. Project is created with Eclipse maven plugin (q4ehttp://code.google.com/p/q4e/). I build and install scala project to local repository fine. I can also run project using mvn scala:run command from project folder. Now I need to run project from repository and I cannot figure out how to do so. Would I need to use mvn scala:run? This will resolve dependencies and install all required libraries... Scala plugin is not recognized as it declared only in pom. I'm trying to update maven's settings.xml, adding this: profile idenv-dev/id repositories repository idscala-tools.org/id nameScala-tools Maven2 Repository/name urlhttp://scala-tools.org/repo-releases/url /repository /repositories pluginRepositories pluginRepository idorg.scala-tools/id nameScala-tools Maven2 Repository/name urlhttp://scala-tools.org/repo-releases/url /pluginRepository /pluginRepositories /profile /profiles activeProfiles activeProfileenv-dev/activeProfile /activeProfiles now if I run mvn scala:run -DmainClass=... it gives me error: [ERROR] BUILD ERROR [INFO] [INFO] The plugin 'org.apache.maven.plugins:maven-scala-plugin' does not exist or no valid version could be found Maybe there is another way to run project from maven repository? Next step for me will be installing artifact into private remote repository (Artifactory) and run project from that remote repository... Any suggestions? --~--~-~--~~~---~--~~ 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: New features
Naftoli,
The ManyToMany class is in the new lift-mapper jar, but the source is
not available in 1.1-SNAPSHOT-sources. Could you provide?
Thanks,
Glenn...
On Jul 27, 3:50 pm, Naftoli Gugenheim naftoli...@gmail.com wrote:
I committed it last night, so I think it should be there.
To use many-to-many, simply mix ManyToMany to your mapper, then create a
MappedManyToMany field like any other field. See the scaladocs for specifics.
Then in your view you can use the field like a collection, e.g., remove an
element with -=, and save the mapper to apply the changes.
-
glenngl...@exmbly.com wrote:
Sounds great. I've been using hacks such as adding code like this to
my mapper classes just to create a Many-to-Many
relationship between say, tag and content tables (using an
intermediary ContentTag table). Similarly, I've done User/Roles
relationships.
private object _dbTags extends HasManyThrough(this, Tag, ContentTag,
ContentTag.content, ContentTag.tag)
private[model] var _tags : List[Tag] = _
private val locker = new Object
def tags : List[Tag] = locker.synchronized {
if(_tags eq null){
_tags = _dbTags()
}
_tags
}
def tags(newTags:String) = locker.synchronized {
_tags = newTags.roboSplit(,).map(Tag.byName(_))
this
}
def tags(newTags:List[Tag]) = locker.synchronized {
_tags = newTags
this
}
def tagsToo:List[Tag] = ContentTag.findAll(By(ContentTag.content,
this.id)).map(_.tag.obj.open_!)
def showTags = Text(tags.map(_.name.is).mkString(, ))
But, then I have to add code like this to the meta-mapper objects:
def addTags(entry: Content) {
if(entry._tags ne null){
entry._tags.foreach(ContentTag.join(_, entry))
}
}
def delTags(entry:Content) =
ContentTag.findAll(By(ContentTag.content, entry)).foreach
(_.delete_!)
It's not very pretty. Nor easy to duplicate.
I hope your new code is considerably less messy.
Is it in the repo-snapshot repository yet.
On Jul 27, 12:57 pm, Naftoli Gugenheim naftoli...@gmail.com wrote:
I committed some code last night, which can help building mapper-based view
snippets, with G-d's help. It includes the following classes:
(1-2) net.liftweb.mapper.OneToMany, ManyToMany: Gives a more
object-oriented approach to managing related entites. You can manage the
many side of a 1-n and n-n as a mutable collection of children, and the
parent of a child can be set directly, instead of via its id. And the
children are not saved to the database when you add them until you call
save on it or its parent, nor deleted when you remove tem until you call
delete_!, which is very helpful when you need to keep track of adds/removes
through multiple requests. For example, if you are displaying a list and
you can click delete, but it shouldn't be permanently deleted until you
click save.
There is a new package, ...mapper.view, which contains a number of
utilities for mapper-based views:
(3-4) ModelView and ModelSnippet provide a number of building blocks for
views that are too complex to CRUDify. Inherit ModelSnippet (which extends
StatefulSnippet) and wrap your entities in ModelView (view is used in the
sense of a wrapper).
(5) Util provides some more building blocks that just be imported, without
needing a ModelSnippet context.
(6-7) Paginator makes it easy to create paginated, user sortable listings.
You can use PaginatedSnippet instead of ModelSnippet to help.
(8-10) ItemsList lets you manage a list of entities with pending additions
and deletions. It's used by TableEditor, which is a very easy to use and
customizable snippet to edit tables directly. It's useful for editing short
lists, e.g., a lookup table like cities. Don't forget to register the table
in Boot.
(11) Then there's the experimental FormProcessor, if you need your form to
be processed in one block instead of separate closures, e.g., to surround
with try.
(12) Also experimental is sitemap.XmlMenu which lets you write menus in xml.
(13) I may add CaseEnum, which lets you write case classes that
automatically double as an Enumeration.
Questions, comments, suggestions, and constructive criticism are more than
welcome!
Thanks.
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[Lift] Re: Hear podcast interview with David Pollack about Lift
Truly enjoyed that one! From: DFectuoso santiago1...@gmail.com To: Lift liftweb@googlegroups.com Sent: Tuesday, July 28, 2009 4:31:05 PM Subject: [Lift] Re: Hear podcast interview with David Pollack about Lift Cheers! That was a great podcast! On Jul 28, 11:48 am, David Pollak feeder.of.the.be...@gmail.com wrote: I had a great time on the podcast... the pondjumpers are a cool pair of dudes. On Mon, Jul 27, 2009 at 11:40 AM, Goldfish gregt...@mindspring.com wrote: Visithttp://pondjumpers.com/2009/07/27/episode-2-interview-about-lift/ to hear a podcast interview with David Pollack about Lift. -- Lift, the simply functional web frameworkhttp://liftweb.net Beginning Scalahttp://www.apress.com/book/view/1430219890 Follow me:http://twitter.com/dpp Git some:http://github.com/dpp --~--~-~--~~~---~--~~ 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: Minimizing Memory Usage
It would redeploy if you were using mvn jetty:run and you changed files in the webapp. Do the increases correspond to (specific) requests? - Peter Robinettpe...@bubblefoundry.com wrote: Thanks, Naftoli. After running for an hour the app is using 45-60% of my (very little) memory. It appears that memory is being used in a sawtooth pattern, with the baseline gradually creeping upwards.[1] I don't see any mention in the logs of any redeployments. Peter [1]: http://www.bubblefoundry.com/lift/jconsole-overview.jpg On Jul 28, 2:15 pm, Naftoli Gugenheim naftoli...@gmail.com wrote: You can monitor it with jconsole. Is the memory building up gradually and not being garbage collected? Is it being redeployed without restarting jetty? - Peter Robinettpe...@bubblefoundry.com wrote: Thanks all for the comments and suggestions. I'm totally new to the Java world, so thanks for mentioning all these various options. First, my system: MySQL is the database I'm using with my Lift app (and some other very low traffic apps) and is tuned pretty aggressively to use little memory. It seems to only use tens of megabytes. My Lift app is based upon 1.1-SNAPSHOT and archetype lift- archetype-basic. Second, JVM options and analysis: how should I pass options to the JVM when launching jetty and Lift with 'mvn jetty:run'? What heap size should I use? How do I monitor a JVM process? My actors being notified of the REST POSTs are scala.actors, as I understood them to be sufficient[1]: class NodeActor extends Actor with ListenerManager. The CometActors that listen to the NodeActors are defined like: class NodeGraph extends CometActor. Thanks for your help, Peter [1]:http://groups.google.com/group/liftweb/msg/86d518b0c44b1b58?hl=en On Jul 28, 10:31 am, Spencer Uresk sur...@gmail.com wrote: I'm not sure about how much overhead Jetty adds to the mix (I'd assume it would be small, but I could be wrong), but on my production server, a small Lift app added only 30 - 40 mb or so to the memory usage of my Tomcat instance. Based on my experience with running Java and Groovy based applications on a VPS, a 256 mb slice should be plenty unless you have lots of concurrent sessions and/or big sessions. If people are having a different experience with Lift-based apps, I'd be interested in hearing that (and why). Peter, Have you tried running jmap on your box to generate a heap dump and then analyzing that to see what is using up all the memory? Using something like MAT (www.eclipse.org/mat/) makes it pretty easy to see what the likely culprits are, and then you can go from there. - Spencer On Tue, Jul 28, 2009 at 3:55 AM, Timothy Perrett timo...@getintheloop.euwrote: Agreed; its pretty light to run all those services. I have a lift based app that's been running for quite some time and its using around 250mb of RAM on average. A raw lift app will probably use 128mb RAM as minimum. Cheers, Tim On 28/07/2009 10:08, marius d. marius.dan...@gmail.com wrote: BTW 256mb seems to me ridiculous small for a server side application. --~--~-~--~~~---~--~~ 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: Minimizing Memory Usage
Nope, haven't touched any of the files. As for the increases, they do not appear to, since requests happen approximately every second and the length of each spike is around one minute. Peter On Jul 28, 3:16 pm, Naftoli Gugenheim naftoli...@gmail.com wrote: It would redeploy if you were using mvn jetty:run and you changed files in the webapp. Do the increases correspond to (specific) requests? - Peter Robinettpe...@bubblefoundry.com wrote: Thanks, Naftoli. After running for an hour the app is using 45-60% of my (very little) memory. It appears that memory is being used in a sawtooth pattern, with the baseline gradually creeping upwards.[1] I don't see any mention in the logs of any redeployments. Peter [1]:http://www.bubblefoundry.com/lift/jconsole-overview.jpg On Jul 28, 2:15 pm, Naftoli Gugenheim naftoli...@gmail.com wrote: You can monitor it with jconsole. Is the memory building up gradually and not being garbage collected? Is it being redeployed without restarting jetty? - Peter Robinettpe...@bubblefoundry.com wrote: Thanks all for the comments and suggestions. I'm totally new to the Java world, so thanks for mentioning all these various options. First, my system: MySQL is the database I'm using with my Lift app (and some other very low traffic apps) and is tuned pretty aggressively to use little memory. It seems to only use tens of megabytes. My Lift app is based upon 1.1-SNAPSHOT and archetype lift- archetype-basic. Second, JVM options and analysis: how should I pass options to the JVM when launching jetty and Lift with 'mvn jetty:run'? What heap size should I use? How do I monitor a JVM process? My actors being notified of the REST POSTs are scala.actors, as I understood them to be sufficient[1]: class NodeActor extends Actor with ListenerManager. The CometActors that listen to the NodeActors are defined like: class NodeGraph extends CometActor. Thanks for your help, Peter [1]:http://groups.google.com/group/liftweb/msg/86d518b0c44b1b58?hl=en On Jul 28, 10:31 am, Spencer Uresk sur...@gmail.com wrote: I'm not sure about how much overhead Jetty adds to the mix (I'd assume it would be small, but I could be wrong), but on my production server, a small Lift app added only 30 - 40 mb or so to the memory usage of my Tomcat instance. Based on my experience with running Java and Groovy based applications on a VPS, a 256 mb slice should be plenty unless you have lots of concurrent sessions and/or big sessions. If people are having a different experience with Lift-based apps, I'd be interested in hearing that (and why). Peter, Have you tried running jmap on your box to generate a heap dump and then analyzing that to see what is using up all the memory? Using something like MAT (www.eclipse.org/mat/) makes it pretty easy to see what the likely culprits are, and then you can go from there. - Spencer On Tue, Jul 28, 2009 at 3:55 AM, Timothy Perrett timo...@getintheloop.euwrote: Agreed; its pretty light to run all those services. I have a lift based app that's been running for quite some time and its using around 250mb of RAM on average. A raw lift app will probably use 128mb RAM as minimum. Cheers, Tim On 28/07/2009 10:08, marius d. marius.dan...@gmail.com wrote: BTW 256mb seems to me ridiculous small for a server side application. --~--~-~--~~~---~--~~ 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: erro: MappedDouble is not mapped to 'double precision' datatype in PostgreSQL?
OK, I've pushed 1.0.1-SNAPSHOT to the repo with something that should fix
the PostgreSQL stuff. Can you update your POM to 1.0.1-SNAPSHOT and try it?
Thanks,
Derek
On Tue, Jul 28, 2009 at 11:40 AM, JanWillem Tulp
janwillem.t...@gmail.comwrote:
Hi Derek,
I am using liftweb version 1.0
Thanks!
On Jul 27, 10:27 pm, Derek Chen-Becker dchenbec...@gmail.com wrote:
This looks like an issue with PostgreSQLDriver. The type should be
DOUBLE
PRECISION. What version of Lift are you using? Let me know and I'll put
a
fix in the proper place.
Derek
On Sun, Jul 26, 2009 at 5:59 AM, JanWillem Tulp
janwillem.t...@gmail.comwrote:
Still looking to find a solution for this, or at least what causes
this behavior. I am looking at the Liftweb source code, and see in the
BaseMetaMapper trait a function called buildMapper that does some
pattern matching on SQL column types (colType). Just for my
understanding, why is there a match for almost any of the basic SQL
types, but not for Types.DOUBLE?
Has anyone else run into this problem?
On Jul 26, 1:34 am, JanWillem Tulp janwillem.t...@gmail.com wrote:
Hi all,
I'm not sure that I am missing something here, but the Schemifier
cannot create a table for a model class that contains an object that
extends from MappedDouble.
This is the Lift code:
class MeasureValue extends LongKeyedMapper[MeasureValue] with IdPK {
def getSingleton = MeasureValue
object value extends MappedDouble(this)
object measure extends MappedLongForeignKey(this, Measure)
}
object MeasureValue extends MeasureValue with LongKeyedMetaMapper
[MeasureValue]
I added MeasureValue to the Schemifier so that it will create a table
when boot is executed. However, this is the stacktrace I get when I
start the application:
main INFO lift - CREATE TABLE measurevalue (measure BIGINT , value
DOUBLE , id BIGSERIAL)
main ERROR lift - Failed to Boot
org.postgresql.util.PSQLException: ERROR: type double does not
exist
at
org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse
(QueryExecutorImpl.java:1592)
at org.postgresql.core.v3.QueryExecutorImpl.processResults
(QueryExecutorImpl.java:1327)
at org.postgresql.core.v3.QueryExecutorImpl.execute
(QueryExecutorImpl.java:192)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute
(AbstractJdbc2Statement.java:451)
at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags
(AbstractJdbc2Statement.java:336)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute
(AbstractJdbc2Statement.java:328)
at
net.liftweb.mapper.Schemifier$.net$liftweb$mapper$Schemifier$
$maybeWrite(Schemifier.scala:150)
at
net.liftweb.mapper.Schemifier$.net$liftweb$mapper$Schemifier$
$ensureTable(Schemifier.scala:160)
at
net.liftweb.mapper.Schemifier$$anonfun$schemify$1$$anonfun$1.apply
(Schemifier.scala:60)
at
net.liftweb.mapper.Schemifier$$anonfun$schemify$1$$anonfun$1.apply
(Schemifier.scala:60)
at scala.List.foldLeft(List.scala:1066)
at net.liftweb.mapper.Schemifier$$anonfun$schemify$1.apply
(Schemifier.scala:60)
at net.liftweb.mapper.Schemifier$$anonfun$schemify$1.apply
(Schemifier.scala:54)
at net.liftweb.mapper.DB$.use(DB.scala:305)
at
net.liftweb.mapper.Schemifier$.schemify(Schemifier.scala:53)
at
net.liftweb.mapper.Schemifier$.schemify(Schemifier.scala:36)
at bootstrap.liftweb.Boot.boot(Boot.scala:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
at sun.reflect.NativeMethodAccessorImpl.invoke
(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
net.liftweb.util.ClassHelpers$$anonfun$createInvoker$1.apply
(ClassHelpers.scala:392)
at
net.liftweb.util.ClassHelpers$$anonfun$createInvoker$1.apply
(ClassHelpers.scala:390)
at net.liftweb.http.DefaultBootstrap$$anonfun$boot$1.apply
(LiftRules.scala:909)
at net.liftweb.http.DefaultBootstrap$$anonfun$boot$1.apply
(LiftRules.scala:909)
at net.liftweb.util.Full.map(Box.scala:330)
at
net.liftweb.http.DefaultBootstrap$.boot(LiftRules.scala:909)
at
net.liftweb.http.LiftFilter.bootLift(LiftServlet.scala:573)
at net.liftweb.http.LiftFilter.init(LiftServlet.scala:548)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter
(ApplicationFilterConfig.java:275)
at
org.apache.catalina.core.ApplicationFilterConfig.setFilterDef
(ApplicationFilterConfig.java:397)
at
[Lift] Re: Mapper and Primary Keys
Did you override the dirty_? def?
Derek
On Tue, Jul 28, 2009 at 3:09 PM, Peter Robinett pe...@bubblefoundry.comwrote:
Sorry to bump this, but does anyone have any idea why my mac column is
not being saved to the database, despite the save method returning
true?
On Jul 22, 9:19 am, Peter Robinett pe...@bubblefoundry.com wrote:
Because it's unique across systems and maps directly to hardware I'm
tracking. But thanks for the equations!
Peter
On Jul 21, 7:20 pm, jon jonhoff...@gmail.com wrote:
This doesn't address your question, so I'll apologize in advance, but
why do you want to use a mac address as a primary key? Also, a mac
address represents six bytes, why not pack into a long? This probably
isn't the most efficient or prettiest way:
def macToLong(mac: String) = java.lang.Long.parseLong(mac.replace
(:,),16)
def longToMac(mac: Long) = (0 to 5).reverse.map( i = (mac ((0xff)
(i * 8).asInstanceOf[Long])) (i * 8)).
map( l = String.format(%02x,l.asInstanceOf[Object])).mkString
(:)
println( longToMac(macToLong(00:1d:c9:00:04:9f)))
On Jul 21, 4:19 pm, Peter Robinett pe...@bubblefoundry.com wrote:
I should add that I believe this is because the field isn't being
marked as dirty and so isn't saved. This is in MappedField:
def dirty_? = !dbPrimaryKey_? _dirty_?
How would I overload it in my object mac definition?
Thanks,
Peter
On Jul 21, 12:30 pm, Peter Robinett pe...@bubblefoundry.com wrote:
Thanks Derek, but unfortunately it only works halfway: I am able to
set MAC address of my new Node and save it (returning true) and my
MySQL database row is created, but the mac column is null.
Peter
On Jul 21, 7:58 am, Derek Chen-Becker dchenbec...@gmail.com
wrote:
I think that this should work, but I haven't tested it:
class Node extends KeyedMapper[String, Node] {
def getSingleton = Node
/* MAC address as primary key */
def primaryKeyField = mac
object mac extends MappedStringIndex(this, 17) {
override def writePermission_? = true
override def dbDisplay_? = true
}
}
Note that primaryKey_? is already set to true in
MappedStringIndex.
writePermission_? is set to false by default...
Derek
On Mon, Jul 20, 2009 at 7:30 PM, Peter Robinett
pe...@bubblefoundry.comwrote:
Hi all,
I'm using Mapper with MAC addresses as my primary keys:
class Node extends KeyedMapper[String, Node] {
def getSingleton = Node
/* MAC address as primary key */
def primaryKeyField = mac
object mac extends MappedStringIndex(this, 17) {
override def dbPrimaryKey_? = true
override def dbDisplay_? = true
}
}
Unfortunately, if I try to create a new Node and assign a MAC
address,
I get an error saying that I don't have permission:
scala Node.create.mac(00:1d:c9:00:04:9f)
java.lang.Exception: Do not have permissions to set this field
at
net.liftweb.mapper.MappedField$class.set(MappedField.scala:425)
at
net.liftweb.mapper.MappedString.set(MappedString.scala:38)
at
net.liftweb.mapper.MappedString$$anonfun$apply$6.apply
(MappedString.scala:121)
at
net.liftweb.mapper.MappedString$$anonfun$apply$6.apply
(MappedString.scala:121)
at net.liftweb.util.Full.f...
How do I go about creating a new Node with the mac address –
the
primary key – of my choosing?
Thanks,
Peter Robinett
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[Lift] Re: Modularization of Lift code
Classpath management is one of OSGi's features. Another is dynamic service registry and dependency management. So following that route, the Lift framework would define an interface that exposes much of what is currently found in Boot. Modules (OSGi bundles) would create implementations of that interface and register them during startup (fortunately the details are usually handled automatically). Lift would also define a manager class that listens to the registry and does whatever bookkeeping is required when modules come and go. Eclipse RCP is a great example of this in action. Note that defining a framework on top OSGi can also be a slippery slope. RCP is a good example of that as well; it's an extensive framework on top of OSGi. So, the question is whether it's worth turning what is currently a straightforward boot process into something that is more modular though more complicated. If so, a good first step would be to define that manager class and interface since these could be wired together by any means (Scala, OSGi, Spring, etc.) without necessarily branching too far. I can take a look if you all think it's worth it (and if Heiko hasn't already). -Stephen --~--~-~--~~~---~--~~ 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: Minimizing Memory Usage
Yep, that's what I figured. I should add the memory usage seems to have stabilized at approximately 55% of all memory. Looking at the logs I see that starting about an hour and a half from launch lots of sessions regularly expire. I assume a session is being created per POST and then expires some time later. Since all the POSTs are coming from the same source, is it possible to make more efficient use of sessions (ie have fewer of them)? Do I need to change something in the source (I have control over it) or in the Lift app? Thanks, Peter On Jul 28, 3:28 pm, Ross Mellgren dri...@gmail.com wrote: If it's a left-to-right sawtooth (e.g. increasing linearly over time and then sharply dropping) then that's probably garbage accumulating then the GC running. -Ross On Jul 28, 2009, at 6:23 PM, Peter Robinett wrote: Nope, haven't touched any of the files. As for the increases, they do not appear to, since requests happen approximately every second and the length of each spike is around one minute. Peter On Jul 28, 3:16 pm, Naftoli Gugenheim naftoli...@gmail.com wrote: It would redeploy if you were using mvn jetty:run and you changed files in the webapp. Do the increases correspond to (specific) requests? - Peter Robinettpe...@bubblefoundry.com wrote: Thanks, Naftoli. After running for an hour the app is using 45-60% of my (very little) memory. It appears that memory is being used in a sawtooth pattern, with the baseline gradually creeping upwards.[1] I don't see any mention in the logs of any redeployments. Peter [1]:http://www.bubblefoundry.com/lift/jconsole-overview.jpg On Jul 28, 2:15 pm, Naftoli Gugenheim naftoli...@gmail.com wrote: You can monitor it with jconsole. Is the memory building up gradually and not being garbage collected? Is it being redeployed without restarting jetty? - Peter Robinettpe...@bubblefoundry.com wrote: Thanks all for the comments and suggestions. I'm totally new to the Java world, so thanks for mentioning all these various options. First, my system: MySQL is the database I'm using with my Lift app (and some other very low traffic apps) and is tuned pretty aggressively to use little memory. It seems to only use tens of megabytes. My Lift app is based upon 1.1-SNAPSHOT and archetype lift- archetype-basic. Second, JVM options and analysis: how should I pass options to the JVM when launching jetty and Lift with 'mvn jetty:run'? What heap size should I use? How do I monitor a JVM process? My actors being notified of the REST POSTs are scala.actors, as I understood them to be sufficient[1]: class NodeActor extends Actor with ListenerManager. The CometActors that listen to the NodeActors are defined like: class NodeGraph extends CometActor. Thanks for your help, Peter [1]:http://groups.google.com/group/liftweb/msg/86d518b0c44b1b58? hl=en On Jul 28, 10:31 am, Spencer Uresk sur...@gmail.com wrote: I'm not sure about how much overhead Jetty adds to the mix (I'd assume it would be small, but I could be wrong), but on my production server, a small Lift app added only 30 - 40 mb or so to the memory usage of my Tomcat instance. Based on my experience with running Java and Groovy based applications on a VPS, a 256 mb slice should be plenty unless you have lots of concurrent sessions and/or big sessions. If people are having a different experience with Lift-based apps, I'd be interested in hearing that (and why). Peter, Have you tried running jmap on your box to generate a heap dump and then analyzing that to see what is using up all the memory? Using something like MAT (www.eclipse.org/mat/) makes it pretty easy to see what the likely culprits are, and then you can go from there. - Spencer On Tue, Jul 28, 2009 at 3:55 AM, Timothy Perrett timo...@getintheloop.euwrote: Agreed; its pretty light to run all those services. I have a lift based app that's been running for quite some time and its using around 250mb of RAM on average. A raw lift app will probably use 128mb RAM as minimum. Cheers, Tim On 28/07/2009 10:08, marius d. marius.dan...@gmail.com wrote: BTW 256mb seems to me ridiculous small for a server side application. --~--~-~--~~~---~--~~ 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: Stamped Trait question
So far it looks like this:
trait Stamped[OwnerType : Stamped[OwnerType] with LongKeyedMapper
[OwnerType] with IdPK] {
this: OwnerType =
private val thisTyped = this.asInstanceOf[MapperType]
override def afterSave {
createActionLog(create, this.getClass.toString, this.id)
}
def afterUpdate {
createActionLog(update, this.getClass.toString, this.id)
}
def beforeDelete {
createActionLog(delete, this.getClass.toString, this.id)
}
private def createActionLog(action: String, klass: String, obj: Long)
{
val log = new ActionLog
log.action(action).klass(klass).record(obj).save
}
}
Now i ensured that the OwnerType class has a LongKeyedMapper with
IdPK.
The final problem is:
afterSave is supposed to return a List(Any) meaning List(OwnerType)..
how can i find out what the OwnerType class is?
And what is it supposed to return? Simply the unmodified record in my
case?
best regards
On 27 Jul., 05:07, fbettag fr...@bett.ag wrote:
Hey guys,
i#ve gotten this together, to get a log of who's editing what. The
trait will give you the idea:
import java.util.Date
import model._
import net.liftweb.mapper._
trait Stamped[OwnerType : Stamped[OwnerType]] extends LongKeyedMapper
[OwnerType] with IdPK {
this: OwnerType =
private val thisTyped = this.asInstanceOf[MapperType]
def afterSave {
createActionLog(create, this.getClass.toString, this.id)
}
def afterUpdate {
createActionLog(update, this.getClass.toString, this.id)
}
def beforeDelete {
createActionLog(delete, this.getClass.toString, this.id)
}
private def createActionLog(action: String, klass: String, obj: Long)
{
val log = new ActionLog
log.action(action).klass(klass).record(obj).save
}
}
On every action i create a log. It's better than having only createdAt/
On which only idicates only the last change, but to have a history.
My only problem is, the extends LongKeyedMapper is the only way to
make it compile with this.id as last parameter of createActionLog().
The question is, how can i find out if the supplied OwnerType Model is
extended with LongKeyedMapper?
Is it possible to supply some kinda subclass check on the supplied
OwnerType.
Btw, i forgot what : does (like in Stamped[OwnerType : Stamped
[OwnerType]]).
any help would be great!
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[Lift] Re: Lift runtime stats snippet
This snippet is located in the sites/example code, not in Lift itself. Look for the RuntimeStats.scala file. On Tue, Jul 28, 2009 at 3:47 PM, Ewan ehar...@gmail.com wrote: Just finally noticed the runtime stats on the demo site and have tried to include them in my own using the following tags which are copied from the example default template except the snippets don't exist in lift/src/main/scala/net/liftweb/builtin/snippet. Stats: Total Memory: lift:runtime_stats:total_mem/ Free Memory: lift:runtime_stats:free_mem/ Open Sessions: lift:runtime_stats:sessions/ Updated At: lift:runtime_stats:updated_at/ I am currently running Liftversion1.1-SNAPSHOT built on Mon Jul 27 04:38:37 BST 2009 Which dependency do I need to add to my POM to get this to work? -- Ewan -- 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 --~--~-~--~~~---~--~~ 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: New features
THis is all very good stuff. Thanks for contributing this excellent stuff to Lift! On Mon, Jul 27, 2009 at 12:57 PM, Naftoli Gugenheim naftoli...@gmail.comwrote: I committed some code last night, which can help building mapper-based view snippets, with G-d's help. It includes the following classes: (1-2) net.liftweb.mapper.OneToMany, ManyToMany: Gives a more object-oriented approach to managing related entites. You can manage the many side of a 1-n and n-n as a mutable collection of children, and the parent of a child can be set directly, instead of via its id. And the children are not saved to the database when you add them until you call save on it or its parent, nor deleted when you remove tem until you call delete_!, which is very helpful when you need to keep track of adds/removes through multiple requests. For example, if you are displaying a list and you can click delete, but it shouldn't be permanently deleted until you click save. There is a new package, ...mapper.view, which contains a number of utilities for mapper-based views: (3-4) ModelView and ModelSnippet provide a number of building blocks for views that are too complex to CRUDify. Inherit ModelSnippet (which extends StatefulSnippet) and wrap your entities in ModelView (view is used in the sense of a wrapper). (5) Util provides some more building blocks that just be imported, without needing a ModelSnippet context. (6-7) Paginator makes it easy to create paginated, user sortable listings. You can use PaginatedSnippet instead of ModelSnippet to help. (8-10) ItemsList lets you manage a list of entities with pending additions and deletions. It's used by TableEditor, which is a very easy to use and customizable snippet to edit tables directly. It's useful for editing short lists, e.g., a lookup table like cities. Don't forget to register the table in Boot. (11) Then there's the experimental FormProcessor, if you need your form to be processed in one block instead of separate closures, e.g., to surround with try. (12) Also experimental is sitemap.XmlMenu which lets you write menus in xml. (13) I may add CaseEnum, which lets you write case classes that automatically double as an Enumeration. Questions, comments, suggestions, and constructive criticism are more than welcome! Thanks. -- 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 --~--~-~--~~~---~--~~ 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: Minimizing Memory Usage
Peter, I was running demo.liftweb.net with a heap size of 32MB. I am using the jetty_instance found in http://github.com/dpp/lift-samples/tree/master 32MB for the heap size is just fine except every once in a while, we get 2,000 new sessions opened up and that pushed the heap past the 32MB level, so I'm currently running with a max 128MB heap. On Tue, Jul 28, 2009 at 4:36 PM, Peter Robinett pe...@bubblefoundry.comwrote: Yep, that's what I figured. I should add the memory usage seems to have stabilized at approximately 55% of all memory. Looking at the logs I see that starting about an hour and a half from launch lots of sessions regularly expire. I assume a session is being created per POST and then expires some time later. Since all the POSTs are coming from the same source, is it possible to make more efficient use of sessions (ie have fewer of them)? Do I need to change something in the source (I have control over it) or in the Lift app? If the POSTs are going to a Custom Dispatch (DispatchPF), you can change the code to be a stateless (LiftRules.statelessDispatchTable instead of LiftRules.dispatch) No session will be generated as part of handling the request. Thanks, David Thanks, Peter On Jul 28, 3:28 pm, Ross Mellgren dri...@gmail.com wrote: If it's a left-to-right sawtooth (e.g. increasing linearly over time and then sharply dropping) then that's probably garbage accumulating then the GC running. -Ross On Jul 28, 2009, at 6:23 PM, Peter Robinett wrote: Nope, haven't touched any of the files. As for the increases, they do not appear to, since requests happen approximately every second and the length of each spike is around one minute. Peter On Jul 28, 3:16 pm, Naftoli Gugenheim naftoli...@gmail.com wrote: It would redeploy if you were using mvn jetty:run and you changed files in the webapp. Do the increases correspond to (specific) requests? - Peter Robinettpe...@bubblefoundry.com wrote: Thanks, Naftoli. After running for an hour the app is using 45-60% of my (very little) memory. It appears that memory is being used in a sawtooth pattern, with the baseline gradually creeping upwards.[1] I don't see any mention in the logs of any redeployments. Peter [1]:http://www.bubblefoundry.com/lift/jconsole-overview.jpg On Jul 28, 2:15 pm, Naftoli Gugenheim naftoli...@gmail.com wrote: You can monitor it with jconsole. Is the memory building up gradually and not being garbage collected? Is it being redeployed without restarting jetty? - Peter Robinettpe...@bubblefoundry.com wrote: Thanks all for the comments and suggestions. I'm totally new to the Java world, so thanks for mentioning all these various options. First, my system: MySQL is the database I'm using with my Lift app (and some other very low traffic apps) and is tuned pretty aggressively to use little memory. It seems to only use tens of megabytes. My Lift app is based upon 1.1-SNAPSHOT and archetype lift- archetype-basic. Second, JVM options and analysis: how should I pass options to the JVM when launching jetty and Lift with 'mvn jetty:run'? What heap size should I use? How do I monitor a JVM process? My actors being notified of the REST POSTs are scala.actors, as I understood them to be sufficient[1]: class NodeActor extends Actor with ListenerManager. The CometActors that listen to the NodeActors are defined like: class NodeGraph extends CometActor. Thanks for your help, Peter [1]:http://groups.google.com/group/liftweb/msg/86d518b0c44b1b58? hl=en On Jul 28, 10:31 am, Spencer Uresk sur...@gmail.com wrote: I'm not sure about how much overhead Jetty adds to the mix (I'd assume it would be small, but I could be wrong), but on my production server, a small Lift app added only 30 - 40 mb or so to the memory usage of my Tomcat instance. Based on my experience with running Java and Groovy based applications on a VPS, a 256 mb slice should be plenty unless you have lots of concurrent sessions and/or big sessions. If people are having a different experience with Lift-based apps, I'd be interested in hearing that (and why). Peter, Have you tried running jmap on your box to generate a heap dump and then analyzing that to see what is using up all the memory? Using something like MAT (www.eclipse.org/mat/) makes it pretty easy to see what the likely culprits are, and then you can go from there. - Spencer On Tue, Jul 28, 2009 at 3:55 AM, Timothy Perrett timo...@getintheloop.euwrote: Agreed; its pretty light to run all those services. I have a lift based app that's been running for quite some time and its using around 250mb of RAM on average. A raw lift app will probably use 128mb
[Lift] Re: Automatic background AJAX: best way to do it?
I'd do the REST API thing. The mechanisms that Lift has for handling API calls from the browser are numerous, but they are associated with a session (you can do ajaxCall or a S.buildJsonFunc). If your client is going to be disconnected, periodically wake up, make an HTTP call on your app and then go back to sleep, the best thing to use is a statelessDispatch and some authentication mechanism as part of the call (truly RESTful and stateless). Also, there's very little that's non Liftish. Lift is about allowing you to focus on the business logic at hand, but sometimes the business logic is update this and REST is good for update this. On Tue, Jul 28, 2009 at 10:57 AM, Nolan Darilek no...@thewordnerd.infowrote: I have a project that will use the geolocation API in Firefox 3.5, Google Gears and other JS frameworks. It will need to keep the user's position updated using the watchPosition API, fetching nearby POIs and such whenever the position changes. I'm actually fairly new to AJAX, and am trying to figure out the best way to do this. Most of the AJAX examples I've seen involve user interaction, such as entering into a text field than removing focus, or waiting on state updates, as with comet. In this case, there's state that may update often or never, and those updates will be triggered by a callback function in the background, with no user interaction into which I can hook. I also don't want to leave a Comet connection open to the app waiting on updates, since the app may see mobile use, and I can't imagine holding open a connection being great for battery life. I'm wondering what the best way to do this would be, while staying fairly close to what Lift offers? Thus far I have two options. 1. Create a REST API and have the Javascript call a specified URL whenever the position changes, inserting the resulting JSON into the page at appropriate places. This works, but seems like it'd involve lots of extra effort, as well as straying away from Lift/Scala's added benefits into the dynamicity of JS, which I'm not entirely comfortable with. 2. Create a hidden JSON form on the page. When the position changes, the JS callback function fills out and submits the form in the background. This seems a bit hackish, with the hidden form and all, but this makes the problem one that is on a bit less shaky Lift ground. I can then use Lift's provided functionality to generate JS for replacing page contents with the results of evaluating the form submission. I'm basically going from the Lift book here. Most ideal, I'd think, would be if there was some way to have my callback function call a snippet directly and be handed back the JS needed, without having to create a separate web service API for this one call. Is the JSON form method the best option here? Or is there some new shiny in 1.1 that isn't documented in the Lift book yet? (or perhaps it *is* documented and I'm just missing it. :) Thanks. -- Nolan Darilek http://thewordnerd.info -- 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 --~--~-~--~~~---~--~~ 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: Minimizing Memory Usage
You might get a clearer picture of memory usage by calling System.gc after each request, so you can see if there is a memory leak somewhere. - David Pollakfeeder.of.the.be...@gmail.com wrote: Peter, I was running demo.liftweb.net with a heap size of 32MB. I am using the jetty_instance found in http://github.com/dpp/lift-samples/tree/master 32MB for the heap size is just fine except every once in a while, we get 2,000 new sessions opened up and that pushed the heap past the 32MB level, so I'm currently running with a max 128MB heap. On Tue, Jul 28, 2009 at 4:36 PM, Peter Robinett pe...@bubblefoundry.comwrote: Yep, that's what I figured. I should add the memory usage seems to have stabilized at approximately 55% of all memory. Looking at the logs I see that starting about an hour and a half from launch lots of sessions regularly expire. I assume a session is being created per POST and then expires some time later. Since all the POSTs are coming from the same source, is it possible to make more efficient use of sessions (ie have fewer of them)? Do I need to change something in the source (I have control over it) or in the Lift app? If the POSTs are going to a Custom Dispatch (DispatchPF), you can change the code to be a stateless (LiftRules.statelessDispatchTable instead of LiftRules.dispatch) No session will be generated as part of handling the request. Thanks, David Thanks, Peter On Jul 28, 3:28 pm, Ross Mellgren dri...@gmail.com wrote: If it's a left-to-right sawtooth (e.g. increasing linearly over time and then sharply dropping) then that's probably garbage accumulating then the GC running. -Ross On Jul 28, 2009, at 6:23 PM, Peter Robinett wrote: Nope, haven't touched any of the files. As for the increases, they do not appear to, since requests happen approximately every second and the length of each spike is around one minute. Peter On Jul 28, 3:16 pm, Naftoli Gugenheim naftoli...@gmail.com wrote: It would redeploy if you were using mvn jetty:run and you changed files in the webapp. Do the increases correspond to (specific) requests? - Peter Robinettpe...@bubblefoundry.com wrote: Thanks, Naftoli. After running for an hour the app is using 45-60% of my (very little) memory. It appears that memory is being used in a sawtooth pattern, with the baseline gradually creeping upwards.[1] I don't see any mention in the logs of any redeployments. Peter [1]:http://www.bubblefoundry.com/lift/jconsole-overview.jpg On Jul 28, 2:15 pm, Naftoli Gugenheim naftoli...@gmail.com wrote: You can monitor it with jconsole. Is the memory building up gradually and not being garbage collected? Is it being redeployed without restarting jetty? - Peter Robinettpe...@bubblefoundry.com wrote: Thanks all for the comments and suggestions. I'm totally new to the Java world, so thanks for mentioning all these various options. First, my system: MySQL is the database I'm using with my Lift app (and some other very low traffic apps) and is tuned pretty aggressively to use little memory. It seems to only use tens of megabytes. My Lift app is based upon 1.1-SNAPSHOT and archetype lift- archetype-basic. Second, JVM options and analysis: how should I pass options to the JVM when launching jetty and Lift with 'mvn jetty:run'? What heap size should I use? How do I monitor a JVM process? My actors being notified of the REST POSTs are scala.actors, as I understood them to be sufficient[1]: class NodeActor extends Actor with ListenerManager. The CometActors that listen to the NodeActors are defined like: class NodeGraph extends CometActor. Thanks for your help, Peter [1]:http://groups.google.com/group/liftweb/msg/86d518b0c44b1b58? hl=en On Jul 28, 10:31 am, Spencer Uresk sur...@gmail.com wrote: I'm not sure about how much overhead Jetty adds to the mix (I'd assume it would be small, but I could be wrong), but on my production server, a small Lift app added only 30 - 40 mb or so to the memory usage of my Tomcat instance. Based on my experience with running Java and Groovy based applications on a VPS, a 256 mb slice should be plenty unless you have lots of concurrent sessions and/or big sessions. If people are having a different experience with Lift-based apps, I'd be interested in hearing that (and why). Peter, Have you tried running jmap on your box to generate a heap dump and then analyzing that to see what is using up all the memory? Using something like MAT (www.eclipse.org/mat/) makes it pretty easy to see what the likely culprits are, and then you can go from there. - Spencer On Tue, Jul 28, 2009 at 3:55 AM, Timothy Perrett
[Lift] Re: Lift runtime stats snippet
Funny thing to display in a website Mixing that with the runmode and displaying a div with that information could be useful for development(im doing this with twitter api request limit status, i will add it there =) ) On Jul 28, 5:18 pm, David Pollak feeder.of.the.be...@gmail.com wrote: This snippet is located in the sites/example code, not in Lift itself. Look for the RuntimeStats.scala file. On Tue, Jul 28, 2009 at 3:47 PM, Ewan ehar...@gmail.com wrote: Just finally noticed the runtime stats on the demo site and have tried to include them in my own using the following tags which are copied from the example default template except the snippets don't exist in lift/src/main/scala/net/liftweb/builtin/snippet. Stats: Total Memory: lift:runtime_stats:total_mem/ Free Memory: lift:runtime_stats:free_mem/ Open Sessions: lift:runtime_stats:sessions/ Updated At: lift:runtime_stats:updated_at/ I am currently running Liftversion1.1-SNAPSHOT built on Mon Jul 27 04:38:37 BST 2009 Which dependency do I need to add to my POM to get this to work? -- Ewan -- Lift, the simply functional web frameworkhttp://liftweb.net Beginning Scalahttp://www.apress.com/book/view/1430219890 Follow me:http://twitter.com/dpp Git some:http://github.com/dpp --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
