hi all
i am modelling a unowned one-to-many relationship using list properties.
@Entity
public class User{
String name;
Boolean loggedIn;
@Basic
private ListKey friends;
}
all is good. i can run queries like
query = Select p from PositionUser p where p.friends = :userKey and +
Hi,
I wonder if somebody else has seen this error before. My application has a
Servlet Filter (that sets Namespace) for all urls, and, from time to time,
the Filter receives a null as value for chain parameter from the platform,
so I get a NullPointerException as I try to follow the chain with
Hey
I have an Entity which contains a ListEntity property that stores
child entities. I have found a bug in my app where during concurrent
modification of child entities all of the children in the parent
entities list will be deleted.
Firstly, why does this happen? Surely it'd be better to throw
I've been running an application successfully for some time on the app
engine. During last week I've couple of times tried enabling threadsafe in
my app. It seems to randomly cause issues with retrieving or storing data
with JDO. What I see when I start to get these issues is this (I've
Hi,
When i try to upload more than 1 MB (Around 2 Mb) i get an error
com.google.apphosting.api.ApiProxy$RequestTooLargeException: The request to
API call urlfetch.Fetch() was too large.
at
Yes, we are also getting same problem.
We are updated latest Google app engine 1.5, then if we try to upload the
file more than 1 MB Its throwing the following exception.
com.google.apphosting.api.ApiProxy$RequestTooLargeException: The request to
API call urlfetch.Fetch() was too large.
at
Hi,
creating a ScriptEngine in a servlet like this:
ScriptEngineManager factory = new ScriptEngineManager();
ScriptEngine engine = factory.getEngineByExtension(js);
(or using the String JavaScript instead of js)
does not work, engine is null.
doing: logger.warning(num engines= +
Hey google team, the backends javadoc reference hasn't been uploaded to the
app engine docs area. I just read it locally so it's not a big deal but
thought you should know.
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When running a backend, what is the suggested method for something like
this:
while(true){
doSomething();
Thread.sleep(1000);
}
Do you have any tricks to replicate this behavior?
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Google App Engine for Java
The latest app engine announcement that most App Engine for Business
functionality would be rolled in to App Engine. Does this mean that all
current developers will have access to the SQL data store or will this just
be for paying customers? If yes then will the access be through JPA or JDBC?
I want to try using backends with java, so I created this xml spec -
which I copied from the appengine docs and added my own name:
backends
backend
namemother/name
classb4/class
instances1/instances
/backend
/backends
I always results in this:
An internal error occurred during:
I am evaluating imagesService.applyTransform() to transform images(from URL)
to specific width/height.
It's documented that PNG is supported. But it seems it doesn't understand
some PNG file.
for example :
Anyone ?
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Hi,
Don't know if what you do is possible but why don't you just obtain
the data that you need from the other application via simple requests
to servlets delivering the needed data.
By using Java standard object serialization, you can achieve what you
need whatever the object class via a unique
Hi,
Do you have the issue on your dev machine or on productive
infrastructure: I remember having issues with PNGs on my dev machine
but that would work ok on live machines
regards
didier
On May 12, 8:27 pm, Teng Shiu Huang small...@gmail.com wrote:
I am evaluating
sorry , I've found the reason.
(the url is incorrectly toLowerCase)
Sorry to disturb you.
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Hi ya!
On May 12, 1:05 am, Didier Durand durand.did...@gmail.com wrote:
1 of the reasons is that all applications don't run all at the same
version on the gae productive infrastructure. So, google would have to
know which one you are using in order to put it for you in your war
when you
arjan,
There are two sides to the App Engine API: the client and the server. The
client side (appengine-api.jar) lives entirely in user-land. If you so
chose, you could create your own version of these classes. In the end, the
client ends up talking to the server through a binary protocol in
I've been programming to the jcache interface that's included in the
appengine sdk
javax.cache.Cache and that still works in SDK 1.5.0.
appengine's service locator (MemcacheService) finds the implementation
for the interface.
import javax.cache.Cache;
import javax.cache.CacheException;
import
I have the same issue:
Eclipse cannot find:
com.google.appengine.api.memcache.jsr107cache.GCacheFactory
.. and if I change it to
com.google.appengine.api.memcache.stdimpl.GCacheFactory
.. then I get the exception.
I need the GCacheFactory when I set the expiration:
I see now that the documentation online is erroneous.
I found the sample xml file in the sample Hello project and copied it.
backends
backend name=mother
classB4/class
options
publicfalse/public
/options
/backend
/backends
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Just a quick summary, the servlet spec requires that a servlet
container such as appengine
provider an implementation for a service. Those jars such as servlet-
api-2.4.jar are needed
at compile time. They are sometimes provided by the servlet container/
engines at run time
in a global directory
This is on our radar but it's not yet supported.
Max
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We don't have anything to announce related to SQL pricing and quotas, but
the access for Java apps will be through JDBC.
Max
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I see it here in com.google.appengine.api.backends:
http://code.google.com/appengine/docs/java/javadoc/
Where are you looking?
Max
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The link from the main app engine docs webpage links to this:
http://code.google.com/appengine/docs/java/com/google/api/backends/package-summary.html
Start here:
http://code.google.com/appengine/docs/
Go to Java -- Backends -- Javadoc Reference
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