I have an interesting problem with my blob store fetches - I need to
fetch 2 chunks of data 5 bytes each that are 1000 bytes apart.
From the perspective of the BlobstoreService, is it more efficient for
me to make 2 fetchData calls of 5 bytes each or 1 fetchData call of
1010 bytes?
Thanks,
Keyur
I am storing some persistent data and all is working fine, I have a
simple data class per examples provided in the Storing Data section.
However, I noticed that all my stored data got reset to null when I
added a couple new fields to be stored.
To give an example, my employee data class was
I am using freemarker-gae-pre2.jar and I get following error when I deploy
to GAE. Its working fine on my local machine
I am using spring MVC + freemarker.
java.lang.VerifyError: (class:
freemarker/ext/jsp/FreeMarkerJspApplicationContext, method: init
signature: ()V) Incompatible argument to
Aah, freemarker-gae-pre2.jar won't work either. I got the same error.
Asked to freemarker mailing list. Lets see what comes up.
Does any one else has any idea?
Thanks
SN
On Tue, Apr 27, 2010 at 11:29 AM, Sudhir Ramanandi sramana...@gmail.comwrote:
First of all, Currently normal release of
Aah, freemarker-gae-pre2.jar won't work either. I got the same error.
Asked to freemarker mailing list. Lets see what comes up.
Does any one else has any idea?
Thanks
SN
On Tue, Apr 27, 2010 at 11:29 AM, Sudhir Ramanandi sramana...@gmail.comwrote:
First of all, Currently normal release of
Hi.
I got tree classes that has one-to-many relationship with each other.
A has a child class B (one to many)
B has a child class C(one to many)
@PersistenceCapable
class A {
@PrimaryKey
@Persistent
public Key key;
@Persistent(mappedBy = a)
@Element(dependent = true)
unfortunately I still am having problem. if parent is already
persisted it does not work. I have a different post for that one.
http://groups.google.com/group/google-appengine-java/browse_thread/thread/a9955f8944a8c520
On Apr 19, 12:27 am, ylmz yilmazhuse...@gmail.com wrote:
Hi every body. I
With a Google Apps Domain (login with user in the domain), it's
possible, but for all public application (with google account) the
user must sign in for all application.
On Apr 26, 11:42 pm, nearm...@gmail.com wrote:
You may be able to accomplish this by using sub-domains. For example:
define Cow as
class Cow {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
@Persistent
@Extension(vendorName=datanucleus, key=gae.parent-pk,
value=true)
private Key farmKey;
}
If you set farmKey to farm id then both farm and cow will
The fix provided in the blog above some how shoots (or hide???) the
inner problem. But the outer problem (cannot create
PageContextFactory) is still there. I get this exception after deploy
the *fixed* version to the cloud:
java.lang.NoClassDefFoundError: Could not initialize class
Thanks Andrey, that works perfectly. I wasn't understanding the
example in the docs about this:
http://code.google.com/appengine/docs/java/datastore/transactions.html
section titled Creating Entities With Entity Groups.
Your example makes it clear,
Thanks
On Apr 27, 6:04 am, ailinykh
Attila has created an issue here
http://code.google.com/p/googleappengine/issues/detail?id=3157
Vote for it.
Thanks
SN
On Tue, Apr 27, 2010 at 6:55 PM, Phuong Nguyen phuongn...@gmail.com wrote:
The fix provided in the blog above some how shoots (or hide???) the
inner problem. But the outer
Is there any way to manually restart GAE on the cloud?
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:D
I actually saw a comic strip a while ago about how people will have to
change their behavior (ie stop rebooting when they fail to fix something),
but I never expected to actually see somebody ask about that.
You can't reboot the cloud. Simply redeploy a new version of your
application if you
We just experienced an outtage that seems to be from Google App Engine
for one of our registered app ID's. It lasted for several hours and it
seems to be back up again without us making any changes. Has anyone
else experienced this? If so, what was the cause?
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You received this message because
8:55AM Pacific was the last error we saw. Basically, it was throwing
DeadlineExceededExceptions quickly all of the time.
On Apr 27, 12:11 pm, luijar luis.j.aten...@gmail.com wrote:
We just experienced an outtage that seems to be from Google App Engine
for one of our registered app ID's. It
This is after deployment and not local. The locals fly fast. No issues
there.
As to your second point-
I set the prefetch to 50/100 etc and also chunk size. The limit for
the qry is also set to large value.
But as you suggested, I will do app stat.
On Apr 26, 4:17 pm, Ikai L (Google)
Hi,
If the previous data is displayed,
I clear the browser cash when simply thinking.
They might be other causes.
I think that it is useful to check the content by log adminconsole.
thanks.
When data is changed from the DB the JSP shows it to the user. The
problem is that the JSP doesn't
Has anyone used AJAX to enable client RPC requests using JAVA. On the Google
App Engine website Paul Peavyhouse does exactly the same thing but he is
using Python. Does anyone know how to do the same thing but using JAVA?
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Due debugging purposes, and only in development environment, I need to
manipulate with a text-file. Obviously I ran into following message...
access denied (java.io.FilePermission F:\workspace\AppEngine1\war\js\main.js
delete)
I thought adding the permission to java.policy would cure this, so
Hi Ikai,
where can I get a more specific response to this issue? I find it odd
something like this would happen in first place (my app hangs for
about 7 seconds awaiting for the process to fire up). I tried pinging
my app every 2 minutes hoping the process would not go to sleep ... to
no effect.
As an addendum to my previous note-- when an app is deployed to App
Engine, I don't get the appstats 'hang' behaviour of my previous post,
in that the servlet response does finish rendering. But, just as with
the local development version, the servlets that caused issues with
Appstats are not
Star this? :)
http://code.google.com/p/googleappengine/issues/detail?id=2931
On Apr 27, 4:33 am, Richard richard.wat...@gmail.com wrote:
My app has a *lot* of cold starts. Sometimes after 2 or 3 minutes,
which seems very aggressive. I've let it go, tried to be good and
waited for it to
Hi!
2010/4/27 Jaroslav Záruba jaroslav.zar...@gmail.com
Due debugging purposes, and only in development environment, I need to
manipulate with a text-file. Obviously I ran into following message...
access denied (java.io.FilePermission
F:\workspace\AppEngine1\war\js\main.js delete)
I
On Apr 27, 7:39 pm, Patrick Cornelißen corne...@pcornelissen.de
wrote:
You could also start a dedicated tomcat
yes, the workaround here is easy... but so far i'm looking for a
solution, also i must!!!11 know why this is not working, i guess
you know that feeling :P
thank you anyways Patrick
Hi!
2010/4/27 Thato Selebogo mahla...@gmail.com
Has anyone used AJAX to enable client RPC requests using JAVA. On the
Google App Engine website Paul Peavyhouse does exactly the same thing but he
is using Python. Does anyone know how to do the same thing but using JAVA?
Maybe I am not
Hi!
2010/4/27 Jaroslav Záruba jaroslav.zar...@gmail.com
On Apr 27, 7:39 pm, Patrick Cornelißen corne...@pcornelissen.de
wrote:
You could also start a dedicated tomcat
yes, the workaround here is easy... but so far i'm looking for a
solution, also i must!!!11 know why this is not
The advantage of Objectify's key management is the generified Key?
class, which helps keep your code straight.
Jeff
On Mon, Apr 26, 2010 at 5:16 AM, Christian Goudreau
goudreau.christ...@gmail.com wrote:
I didn't try, but I'm sure that if you set a Key field that doesn't exist in
the
Hi,
If you look at the logs of your deployed application, do you see any
errors, such as an OutOfMemoryError? My current suspicion is that app
stats collects so much data (and keeps it in memory) for this request
that it runs out of memory before it can persist it. If that is the
case, we might
Hey Andi,
It goes something like this as far as I understand it.
Your app lives in a process. When requests come in, those requests are
handed to the app process to do what it needs to do and send a
response. When request A comes in and there are no active processes,
the app process starts up
1) yes, that should work just fine (at least in low-level datastore
API it does)
2) your key should not be your security / accessibility mechanism, so
yes, it should be fine (although using a Long id vs. keyAsString would
be prettier). also, you want to make sure you restrict access to your
For your information I ended up choosing Objectify. I picked that
because...
* of its very informative, yet short and elegant, documentation. In
fact, it is a far more precise and explanatory description of
datastore than in Google's own GAE documentation;
* the simple, yet powerful API. I
any ideas on what I am doing wrong? Please help!
On Apr 27, 12:31 am, kghate kgh...@gmail.com wrote:
I am storing some persistent data and all is working fine, I have a
simple data class per examples provided in the Storing Data section.
However, I noticed that all my stored data got reset to
Submitted a new feature request for this:
http://code.google.com/p/googleappengine/issues/detail?id=3160
== Keyur
On Apr 26, 1:57 pm, keyurva keyu...@gmail.com wrote:
Currently to upload blobs, the blob store service creates a unique one-
time URL that a user can post blobs to. My requirement
No, this is not expected behavior. Try rolling back your application and
seeing if this still occurs. I suspect something else is wrong - you just
need to narrow down the version of your application that causes this to
happen.
2010/4/27 Marcos Vinícius Soares mavsoa...@gmail.com
I believe this
The BlobstoreService has two method using which one can fetch data.
The first one being fetchData(blobKey, start, end) = which fetches
the subset for a blob.
The second being serve(blobKey)
Is there a reason why the serve method, does not maintain the same
contract as that of fetchData(...) ?
Hi all
i am using JDO and i want to count the number of entities so which is
more efficient
using a count quert, eg:
select count (this) from User
or key only query
select id from User
then get the count using resultList.size();
by the way , i know that the recommended way on appengine is to
Hi all
GAE JPA implementation level is version 1 which does not support list
of primitives
and i want to port my JDO code to JPA
so how can i convert
@Persistent private ListString tags;
to its JPA counterpart which work on appengine as a list property not
a blob(not using serialization)
and if
Hi all
in the doc , section Quotas and Limits
i found maximum size of a datastore API call response= 1 MB
what does this mean?
does it mean that the query result cannot exceed 1 MB , so what about
the rest of the result, does the JDO layer take care of this and
handle it transparently or what?
do
Hey Simith,
I am struggling exactly with the same problem.
I read manual about inheritance here
http://code.google.com/appengine/docs/java/datastore/dataclasses.html#Inheritance
So I was pretty sure that JDO inheritance on App Engine works as
described in the DataNucleus documentation.
First of
Hi,
I am new to Java and App engine. I am trying to query data that has
been written to the datastore using JDO. I am getting an exception
when I try to filter on a Date property:
Query query = pm.newQuery(DataPoint.class);
query.setFilter( m_tradeDateTime DATETIME(2010,
Hi all
the title says it all...
which one is more efficient in:
cpu usage
time consumption
thanks
Joe
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Hi dear
it seams that u r new to appengine
please take enough time to understand the datastore concepts as it is
not a RDBMS
and yes appengine JPA code is not 100% portable, you have to do some
work (both on the domain layer and the dao layer) to port RDBMS jpa
code to appengine and the reverse
App Engine downtime TOMORROW, Wed Apr 28 1-2p PDT (GMT-7) and same
time next Wed, May 5
http://groups.google.com/group/google-appengine-downtime-notify/browse_thread/thread/4857b46e4e6ff0f9
please join the downtime notification group to be alerted on all such
planned downtimes. all apps will go
Thank you so much Tristan. I have another question on top of #3.
I can query on listitem parentkey = listcontainerkey and isproccess =
true. it is easier, yes. but I expect the data to be growing. there;ll
be lot of users with all their listitems stored in a single big list,
the processed and
Btw, I am not going to get all the isprocessed=true records at once.
I'll get only the top 100 at any given time.
On Apr 28, 7:05 am, Pk prakash...@gmail.com wrote:
Thank you so much Tristan. I have another question on top of #3.
I can query on listitem parentkey = listcontainerkey and
http://www.datanucleus.org/products/accessplatform_2_0/jdo/jdoql.htmlExample
3 is the right answer for you.
It might be better if you could go through document to have an understanding
on its concepts first.
Thanks.
On Wed, Apr 28, 2010 at 1:36 AM, Vinay vinaytand...@gmail.com wrote:
Hi,
I am
In my previous test, query is faster.
--
keakon
2010/4/28 Joe Fawzy joewic...@gmail.com:
Hi all
the title says it all...
which one is more efficient in:
cpu usage
time consumption
thanks
Joe
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You received this message because you are subscribed to the Google Groups
:))
Sorry if I used the wrong word. I mean restart my JVM. Since each app
will be allocated some JVMs, which run on some servers, I wonder if I
can reboot them. It is not an ideal solution, certainly, when you are
talking about error-tolerance and scaling. However, during some phase
of
On Wed, Apr 28, 2010 at 5:24 AM, Joe Fawzy joewic...@gmail.com wrote:
select count (this) from User
Since when app engine support group operation? ;-)
On Wed, Apr 28, 2010 at 5:24 AM, Joe Fawzy joewic...@gmail.com wrote:
Hi all
i am using JDO and i want to count the number of entities so which
In the Admin Console you can disable your application and re-enable
it. I think it is much like a JVM reboot.
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I think disable/enable your app doesnot reboot JVM.
I'm trying FreeMarker. If JVM process a class for the first time, then
VerifyError is thrown. On second time, it throw NoClassDefFoundError.
When I disabled and reenabled, JVM still throws NoClassDefFoundError.
So I guess JVM is not restarted.
Delete the version and redeploy, maybe?
Or should Google hep you look into your case, as App Engine user do not have
such direct control on their system to reboot.
On Wed, Apr 28, 2010 at 10:54 AM, Phuong Nguyen phuongn...@gmail.comwrote:
I think disable/enable your app doesnot reboot JVM.
Is it possible to send an email via Transport.send without it sending
a CC: to the FROM: address?
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To
Can anyone from google explain what
java.lang.VerifyError: (class:
freemarker/ext/jsp/FreeMarkerJspApplicationContext, method: init
signature: ()V) Incompatible argument to function, means?
See the issue http://code.google.com/p/googleappengine/issues/detail?id=3157
I have attached the source of
With new SDK i'm getting this error when working with db.Expando
models. It gives this error on simple get. My application stop working
after this update. Any ideas? I still can see data in Data Viewer.
I'm getting this error on production.
File
It seems to be internal ip-addresses for task queues
On 27 апр, 11:45, buger leons...@gmail.com wrote:
i also see this IP 0.1.0.1
On Apr 27, 11:41 am, buger leons...@gmail.com wrote:
What is this IP 0.1.0.2?http://goo.gl/uxnz
For my services it's like DoS attack )
--
You received
I'm interested in hearing thoughts on this as well.
Herbert: I had a similar problem sometime ago and I solved it by using
a single ListProperty with custom prefixes to distinguish between
fields of different types. So in your example, I would have used a
prefix f.. to represent a friend and l..
Replace net.sf.jsr107 in the import statements by javax.cache
On Apr 19, 9:46 am, RockyWolf jamesisaa...@gmail.com wrote:
I get this error when I try to run my app:
com.scrapbook.CacheException: Class: 'ri.cache.BasicCacheFactory'
does not implement CacheFactory
I had included all the
That was my mistake but previous versions of SDK it ignored)
On 27 апр, 12:14, buger leons...@gmail.com wrote:
With new SDK i'm getting this error when working with db.Expando
models. It gives this error on simple get. My application stop working
after this update. Any ideas? I still can see
BTW, it was becouse i had @propery as function, defined in class, with
same name of db.Expando property. I just renamed my function.
On Apr 27, 2:32 pm, buger leons...@gmail.com wrote:
That was my mistake but previous versions of SDK it ignored)
On 27 апр, 12:14, buger leons...@gmail.com wrote:
Krishna: i see what you mean. so instead of querying for two lists you
do a prefixed self-join. i quickly test my version that queries two
lists that actually works fine, but i don't have a big test case yet.
coz anything bigger than thousand rows slows down in the dev server
even for simple query
Hi Herbert,
A query like this will use the merge join strategy by default. If it's too
slow for the merge join strategy, you could have to build a custom index for
it, which would indeed be 'exploding' - each User entity would have
len(friends)*len(likes) index entries.
-Nick
On Mon, Apr 26,
Hi !
Just wanted to let you know, I was able to use CAS client (http://
www.jasig.org/cas) with AppEngine. So I'll write the few steps here,
in case anyone look for it when searching on Google ;-)
First, I followed these steps :
On Apr 26, 7:11 pm, Hanh mercury24...@gmail.com wrote:
I'm trying to create an app on the cloud, and it needs to launch a
program from the Program Files on the host machine. I tried it with
Windows Azure, and they do not allow this access. I just wonder if I
can do this with Google App
Hi,
I have a User class in my project, and I can't find a transactionally
safe method of creating relationships between users, because User
objects are always in their own entity group.
The simplest example I can come up with is a follow relationship (like
twitter). When a user follows another,
Nope, you can't do this.
On a side note, if you were working in Python, you'd have eval().
On Mon, Apr 26, 2010 at 3:16 PM, David david.s.jan...@gmail.com wrote:
Is it possible to store and compile a java (or C or whatever language)
program on the server with Google App Engine, returning the
Well ... can't is a very strong word. Theoretically, you could probably
write a compiler using the available whitelist classes, but I suspect this
isn't what you are looking for ...
On Tue, Apr 27, 2010 at 10:03 AM, Ikai L (Google) ika...@google.com wrote:
Nope, you can't do this.
On a side
You could fire a transactional task within the first transaction - and don't
let the task handler finish error free until the second modification is made
(so it keeps retrying).
On 28 April 2010 00:17, Mark mar...@gmail.com wrote:
Hi,
I have a User class in my project, and I can't find a
Perhaps you could check if the datastore is in read-only mode at the
beginning of the task, then do what ever action is appropriate for
your case (like raise an exception).
Robert
On Mon, Apr 26, 2010 at 4:45 AM, Matija matija.jerko...@gmail.com wrote:
Is there way to pause task queue if
Were there any actual exceptions in the app's log?
Did you see the requests in the request log?
If you were using a custom domain, could you access the site directly
at the 'appname'.appspot.com url?
Robert
On Mon, Apr 26, 2010 at 9:52 AM, WeShine Tech
intelltest.ad...@gmail.com wrote:
Hi,
I have an application which requires some relatively big inserts into
the datastore. The amount of data isn't huge, but there are often
100,000 rows in each file upload (and I could be doing about 500-1000
per day). At the moment I'm doing something like
for row in file:
new_row =
I am having this problem also. Found this thread in Google Groups:
http://groups.google.com/group/google-appengine/browse_thread/thread/9eb30d64423a37ea.
The module requires Visual Studio to build and install. To have to
install Visual Studio just for this seems a bit heavy. If some kind
soul out
Hi,
I am having the same problem and I am looking for a solution. Thank
you for providing one Petrov as I was not able to find any...
Were you able to find something else ? I mean something easier and
cleaner than setting up a python app ?
Regards,
Maxime.
On 27 abr, 16:55, Petrov Aleksander
Your Session class overrides Model.__init__? It has an intentionally
undocumented parameter _from_entity. When doing things like
overriding __init__, consider adding **kwargs, passing it on to the
super-class' constructor.
Hugo
On Apr 27, 12:10 am, Ralfeus ralf...@gmail.com wrote:
Hi, everyone
Hi Scott,
Thanks that's a great idea. I also just found this article which I
think I can adopt as well:
http://blog.notdot.net/2009/9/Distributed-Transactions-on-App-Engine
I will try to convert that to java and post to the forum,
Thanks
On Apr 27, 10:15 am, Scott Ellis sje...@gmail.com
App Engine downtime TOMORROW, Wed Apr 28 1-2p PDT (GMT-7) and same
time next Wed, May 5
http://groups.google.com/group/google-appengine-downtime-notify/browse_thread/thread/4857b46e4e6ff0f9
please join the downtime notification group to be alerted on all such
planned downtimes. all apps will go
I have an application with a login screen that connects to a server
and authenticates.
I've looked up numerous tutorials on using Progress Dialogs and
Handlers, and they all explain how to run a seperate thread to (in my
case) send the REST request and check the response. However, my issue
is that
Is there a way to flush the cache from the control panel? I'd like to
be able to do this when I delete an entity that is cached. When can do
this in the dev environment, am I just missing the link?
Tim
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I did look into the problem and have been suggested that it could be due to
latency issues. Please could you guide me through as to how to fix this. I
have used the same code with more number of clients before but never faced a
problem like this.
The logs also show latency issues. And I did run
Hi Nick
Thank you. One thing I'm still a bit confused about index. I had the
impression that if I've executed all kinds of queries before I deploy,
all required indexes would be included, am I correct?
Does building a custom index improve performance on complex queries
even though it is not
On Apr 27, 10:34 pm, Nash-t timna...@gmail.com wrote:
Is there a way to flush the cache from the control panel? I'd like to
be able to do this when I delete an entity that is cached. When can do
this in the dev environment, am I just missing the link?
There isn't a built-in way, but you
Anupam,
Are you saying that you have other clients (customers) running the
same code on different deployments, or are you saying you have loaded
this app more heavily while running the current code? When you say
the log shows latency issues I assume you mean the requests are taking
a lot of CPU
Hello Robert,
Are you saying that you have other clients (customers) running the
same code on different deployments ?
No. So what happened is at my clients site the
application stopped responding. So I started using the earlier versions of
my application and those seemed to work fine.
Is there something similar to skip_files in Java?
On Apr 12, 9:14 pm, Wooble geoffsp...@gmail.com wrote:
http://code.google.com/appengine/docs/java/config/appconfig.html#Stat...
You should be able to exclude them.
On Apr 12, 2:47 pm, therealjz thereal...@gmail.com wrote:
Exactly what I
Hi,
I'm trying to port the article written by Nick Johnson on distributed
transactions from python to java:
http://blog.notdot.net/2009/9/Distributed-Transactions-on-App-Engine
it is almost working, just have a problem on one of the last steps
where a named-key is supposed to be created.
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