[appengine-java] Re: Cache-Controle Expiration on static files
I also have the same issue - the header is not impacted by the expiration value. Yossi On Sep 4, 3:50 pm, Patou patou.de.saint.ste...@gmail.com wrote: hello, I test the new sdk, and I see that we now add a expiration attribut in the include tag in appengine-web.xml to set the expiration cache time. But it's not seems to work . My appengine-web.xml : static-files include path=/ressource/css/*.css expiration=10d/ include include path=/ressource/css/img/*.* expiration=10d/ include exclude path=**/*.gwt.rpc/ /static-files When I deploy on internet, the header of all css and img file is : Cache-Control: max-age=0 Has anybody try to do works it ? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: After upgrade to Java SDK 1.2.5 Key property saved but retrieved as null
OK, but why would this behavior be happening inconsistently across his
(and probably others) application?
On Sep 5, 7:06 pm, Max Ross maxr+appeng...@google.com wrote:
Key is not in the default fetch group because it is an appengine-specific
class. The JDO spec doesn't know anything about app engine so there's no
way that Key could be included in the list of types that are automatically
included in the default fetch group.
Max
On Fri, Sep 4, 2009 at 1:32 PM, Yegor yegor.jba...@gmail.com wrote:
Just so you know, I think I have solved the problem by setting
defaultFetchGroup=true on the Key property:
@Persistent(defaultFetchGroup=true)
private Key text;
Might have something to do with the recently closed issue #58 Queries
don't respect fetch groups:
http://code.google.com/p/datanucleus-appengine/issues/detail?id=58
What's puzzling is that I have unowned relationships all over the
application, however only one class - CMSPage - fails to retrieve the
Key properties.
I am not sure why Key is not automatically in the default fetch group.
Key is not an entity class. It should be ok to fetch it non-lazily by
default.
Yegor
On Sep 4, 1:21 pm, Yegor yegor.jba...@gmail.com wrote:
Hi,
I am experiencing a problem after upgrading to Java SDK 1.2.5. In a
simple CMS application a page is stored as a CMSPage entity, which
points to its text saved as a DetachedText entity using a Key property
(i.e. an unowned relationship) as follows:
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class CMSPage {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
@Persistent
private Key text;
public Key getId() {
return id;
}
public void setId(Key id) {
this.id = id;
}
public Key getText() {
return text;
}
public void setText(Key text) {
this.text = text;
}
}
The Key property text points to:
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class DetachedText {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
@Persistent
private Text content;
public DetachedText(Text content) {
this.content = content;
}
public Key getId() {
return id;
}
public Text getContent() {
return content;
}
}
NOTE: I have removed other properties and code that I found unrelated
to the problem
After saving the page I can see the text field populated in the
development console. The value shows as DetachedText(5). I also
verified that the DetachedText entity exists and its ID equals 5.
However, after I retrieve CMSPage from the datastore using a
javax.jdo.Query the text field in the retrieved object is null (both
the Eclipse debugger and the application throwing NPE confirm it).
What am I doing wrong?
Any pointers will be appreciated.
Thanks,
Yegor
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[appengine-java] Re: Weird ArrayStoreException after new deployment to production
Similar problem with SimpleDateFormat here - http://groups.google.com/group/google-appengine-java/browse_thread/thread/a7ea6dd1e097d496?pli=1 On Aug 20, 10:46 am, James H james.hollier...@gmail.com wrote: Ah yes, I was looking for that very switch to disable Sessions and it did help isolate the problem towards a field within my class being pushed into the Session. The field is java.text.SimpleDateFormat which does implement Serializable so don't know why the system would be able to serialize it, then NOT be able to deserialize it. I think for now I will tag it as Transient and re-init it before use. On Aug 19, 10:17 am, Toby Reyelts to...@google.com wrote: Unfortunately, I don't understand exactly why the problem is still occurring for you. The stacktrace you shared points directly to failure of deserialization of a session attribute: at java.io.ObjectInputStream.readObject0(Unknown Source) at java.io.ObjectInputStream.readObject(Unknown Source) * at com.google.apphosting.runtime.**jetty.SessionManager.** deserialize(SessionManager.java:358) * at com.google.apphosting.runtime.jetty.SessionManager.loadSession(SessionManager.java:280) Are you absolutely sure you're not putting something into the HttpSession? The two steps I would take are to: 1) disable http sessions in appengine-web.xml then 2) delete all http sessions saved in the datastore On Wed, Aug 19, 2009 at 10:45 AM, James H james.hollier...@gmail.comwrote: Ok, I reviewed my use of Session attribute (I only use 1 called userSession) and cleaned up a few things such as the serial UID, etc. During production testing, I also Deleted the _ah_Session rows and I notice the problem still occurred on the home page as before. So, I modified the app to NOT perform any session.put() calls. And this same exception is still occurring. The behavior is as follows. Launch a new browser and the home page comes up, try to Refresh the home page and the exception gets thrown. Is it possible the deploy is NOT refreshing ALL my code in production? Is there a way to force the deploy to do a truncate/load rather than an incremental? I hate to think there are some stale classes out there being loaded somehow... So, as before I do NOT see any relation at this point between this error and my coding. From the trace, the error is NOT occurring within the scope of my code. Any other ideas? On Aug 18, 6:42 pm, Toby Reyelts to...@google.com wrote: You probably have something stored in your session that's not deserializing. If you clear your sessions, this problem should go away. In the next release, this problem should be fixed under most circumstances. On Tue, Aug 18, 2009 at 6:05 PM, James H james.hollier...@gmail.com wrote: My app has been working well, but after this weekends changes my deployment does NOT come online clean...though I can't related the error to anything that has changed. The stack trace is attempting to load the JSP, so it doesn't appear the problem is related to running the JSP. Hence, execution has NOT reached my code! Any ideas? Naturally, all works fine during local testing. So, this is only failing in production. EXCEPTION javax.servlet.ServletException:java.lang.ArrayStoreException: [Ljava.lang.String; at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle (AppVersionHandlerMap.java:239) at org.mortbay.jetty.handler.HandlerWrapper.handle (HandlerWrapper.java:139) at org.mortbay.jetty.Server.handle(Server.java:313) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: 506) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete (HttpConnection.java:830) at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable (RpcRequestParser.java:76) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest (JettyServletEngineAdapter.java:139) at com.google.apphosting.runtime.JavaRuntime.handleRequest (JavaRuntime.java:235) at com.google.apphosting.base.RuntimePb$EvaluationRuntime $6.handleBlockingRequest(RuntimePb.java:4823) at com.google.apphosting.base.RuntimePb$EvaluationRuntime $6.handleBlockingRequest(RuntimePb.java:4821) at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest (BlockingApplicationHandler.java:24) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java: 359) at com.google.net.rpc.impl.Server$2.run(Server.java:820) at com.google.tracing.LocalTraceSpanRunnable.run
[appengine-java] Query + Filter for Key as Encoded String
Hi!
I've the following Entity:
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Document implements Serializable {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
@Extension(vendorName = datanucleus, key = gae.encoded-pk, value
= true)
private String encodedKey;
@Persistent
@Extension(vendorName = datanucleus, key = gae.pk-name, value =
true)
private String id;
[...]
}
I would like to create a query filtered by id, but it doesn't work.
How can I make this work? Thanks for your help!
My try was the following:
Query query = pm.newQuery(Document.class);
query.setFilter(id == param);
query.declareParameters(String param);
try {
ListDocument results = (ListDocument) query.execute(id);
if (results.iterator().hasNext()) {
for (Document d : results) {
// do something with the Document.
// throw new RuntimeException(d.getTitle());
}
} else {
// ... no results ...
}
} catch (Exception ex) {
ex.printStackTrace();
} finally {
query.closeAll();
}
I know I've could get the object by Key, but there's a hierarchy in
Documents, so I can't create the key by hand.
Thanks!
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[appengine-java] Re: is not persistable
Oh mine! It occurred again. JDO looks quite fragile.
Is there any wrong with following code?
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Category {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Long id;
@Persistent
private String name;
public Category() {
}
public Category(String name) {
this.name = name;
}
public Long getId() {
return id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
serverlet:
...
@SuppressWarnings(unchecked)
public ListCategory getCategories() {
String query = select from + Category.class.getName();
PersistenceManager pm = PMF.get().getPersistenceManager();
try {
return (ListCategory) pm.newQuery(query).execute();
} catch (Exception ex) {
}
return null;
}
private void initializeCategories() {
ListCategory categories = this.getCategories();
if (categories == null || categories.isEmpty()) {
categories = new ArrayListCategory();
Category category = new Category(Boys);
categories.add(category);
category = new Category(Girls);
categories.add(category);
PersistenceManager pm =
PMF.get().getPersistenceManager();
try {
pm.makePersistentAll(categories);
} finally {
pm.close();
}
}
}
...
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[appengine-java] Re: is not persistable
Oh mine! It occurred again. JDO looks quite fragile. Nothing fragile about the persistence process. You simply have to define your classes as persistent and enhance them, and have the enhanced ones in the CLASSPATH. Not hard --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Upgrade issue with Google SDK 1.2.5
I used the Eclipse Soft Updates menu on Sep 4th to apply SDK 1.2.5 after noticing Red errors in the local runtime log telling me to do so. Actually, first I noticed my production app was failing to retrieve data so I figured I needed to first upgrade as instructed by the log message and then see if there were still any data issues. I had been running SDK 1.2.2 since July without problems locally or in production. The install of the upgrade ran without errors. Here is the Eclipse install history: Jul 12, 2009 1:24:28 PM file:/C:/homeGoogle/programs/eclipse/ site- install success Jul 12, 2009 1:49:03 PM Date / Time Target Action Status Jul 12, 2009 1:48:12 PM com.google.gdt.eclipse.suite.e33.feature_1.0.1.v200905131156 feature- install success Jul 12, 2009 1:48:26 PM com.google.gdt.eclipse.suite.e33.feature_1.0.1.v200905131156 feature- enable success Jul 12, 2009 1:48:26 PM com.google.gwt.eclipse.sdkbundle.e33.feature_1.6.4.v200904062254 feature-install success Jul 12, 2009 1:49:03 PM com.google.gwt.eclipse.sdkbundle.e33.feature_1.6.4.v200904062254 feature-enable success Jul 12, 2009 1:50:20 PM Date / Time Target Action Status Jul 12, 2009 1:50:06 PM com.google.appengine.eclipse.sdkbundle.e33.feature_1.2.1.v200905131156 feature-install success Jul 12, 2009 1:50:20 PM com.google.appengine.eclipse.sdkbundle.e33.feature_1.2.1.v200905131156 feature-enable success Jul 24, 2009 10:01:27 PM Date / Time Target Action Status Jul 24, 2009 10:01:01 PM com.google.appengine.eclipse.sdkbundle.e33.feature_1.2.2.v200907131018 feature-install success Jul 24, 2009 10:01:27 PM com.google.appengine.eclipse.sdkbundle.e33.feature_1.2.2.v200907131018 feature-enable success Jul 24, 2009 10:01:27 PM com.google.appengine.eclipse.sdkbundle.e33.feature_1.2.1.v200905131156 feature-disable success Sep 4, 2009 6:27:25 AM Date / Time Target Action Status Sep 4, 2009 6:26:51 AM com.google.gdt.eclipse.suite.e33.feature_1.1.0.v200907291650 feature- install success Sep 4, 2009 6:27:12 AM com.google.gdt.eclipse.suite.e33.feature_1.1.0.v200907291650 feature- enable success Sep 4, 2009 6:27:12 AM com.google.gdt.eclipse.suite.e33.feature_1.0.1.v200905131156 feature- disable success Sep 4, 2009 6:27:12 AM com.google.appengine.eclipse.sdkbundle.e33.feature_1.2.5.v200909021033 feature-install success Sep 4, 2009 6:27:25 AM com.google.appengine.eclipse.sdkbundle.e33.feature_1.2.5.v200909021033 feature-enable success Sep 4, 2009 6:27:25 AM com.google.appengine.eclipse.sdkbundle.e33.feature_1.2.2.v200907131018 feature-disable success Sep 5, 2009 11:13:51 AM Date / Time Target Action Status Sep 5, 2009 11:12:38 AM com.google.gwt.eclipse.sdkbundle.e33.feature_1.7.0.v200907131018 feature-install success Sep 5, 2009 11:13:48 AM com.google.gwt.eclipse.sdkbundle.e33.feature_1.7.0.v200907131018 feature-enable success Sep 5, 2009 11:13:48 AM com.google.gwt.eclipse.sdkbundle.e33.feature_1.6.4.v200904062254 feature-disable success At this point my Eclipse behaves as though the Google SDK is NOT installed. For example, the Google Icons are NOT displayed in the Toolbar, etc. From the above install history, it appears the following are enabled and the older version have been disabled: com.google.gwt.eclipse.sdkbundle.e33.feature_1.7.0.v200907131018 com.google.appengine.eclipse.sdkbundle.e33.feature_1.2.5.v200909021033 com.google.gdt.eclipse.suite.e33.feature_1.1.0.v200907291650 How do I get this SDK working again? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] confuse on Whitelist
I saw white list http://code.google.com/appengine/docs/java/jrewhitelist.html , java.lang.Thread is in it. Aren't Thread not supported? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] support for task queues in development environment?
Task queues are working properly when I deploy my app to Google's servers, but never get executed in my development environment (Eclipse Galileo). There are no errors, no logs, no indication of what's going wrong. Queue.add() returns successfully, but my tasks never get executed. I'm running the exact same code in development and in production. Any clues, or any way for me to figure out what's going wrong? Are task queues supported in the development environment? Thanks. Vince --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] 500 Internal Server Error when uploading to GAE
Hi, I'm using Eclipse plugin and sdk-1.2.2 to upload my app to GAE, its size is 109MB. From time to time I'm facing upload problems with the following error: java.io.IOException: Error posting to URL: http://appengine.google.com/api/appversion/addblob?path=__.500 Internal Server Error The stack trace is: Unable to upload: java.io.IOException: Error posting to URL: http://appengine.google.com/api/appversion/addblob?path=__static_... 500 Internal Server Error Server Error (500) A server error has occurred. at com.google.appengine.tools.admin.ServerConnection.send (ServerConnection.java:143) at com.google.appengine.tools.admin.ServerConnection.post (ServerConnection.java:95) at com.google.appengine.tools.admin.AppVersionUpload.send (AppVersionUpload.java:420) at com.google.appengine.tools.admin.AppVersionUpload.uploadFile (AppVersionUpload.java:323) at com.google.appengine.tools.admin.AppVersionUpload.doUpload (AppVersionUpload.java:105) at com.google.appengine.tools.admin.AppAdminImpl.update (AppAdminImpl.java:53) at com.google.appengine.eclipse.core.proxy.AppEngineBridgeImpl.deploy (AppEngineBridgeImpl.java:271) at com.google.appengine.eclipse.core.deploy.DeployProjectJob.runInWorkspace (DeployProjectJob.java:148) at org.eclipse.core.internal.resources.InternalWorkspaceJob.run (InternalWorkspaceJob.java:38) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Is there something I should configured somewhere? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: After upgrade to Java SDK 1.2.5 Key property saved but retrieved as null
I think it makes sense now. I did see more exceptions related to
incorrect transaction handling (e.g. updating multiple entities from
different entity groups) that didn't happen prior to 1.2.5. It seems
that it was the upgrade to datanucleus 1.1.5 that triggered these
exceptions. I am not suggesting that 1.1.5 introduced bugs (but
neither denying it). I think it was my code that relied on a previous
bug that got fixed in 1.1.5. Actually I do not require transactions at
this point at all and in the future expect them to be an exception
rather than the norm, so I disabled them and the application is now
running as expected.
Thanks,
Yegor
On Sep 6, 11:08 am, Max Ross maxr+appeng...@google.com wrote:
It shouldn't be inconsistent. The field will only be unavailable outside
the transaction if it was not accessed inside the transaction, so that might
explain why it only happens in certain places.
On Sat, Sep 5, 2009 at 11:55 PM, bgood ben.mcgee.g...@gmail.com wrote:
OK, but why would this behavior be happening inconsistently across his
(and probably others) application?
On Sep 5, 7:06 pm, Max Ross
maxr+appeng...@google.commaxr%2bappeng...@google.com
wrote:
Key is not in the default fetch group because it is an appengine-specific
class. The JDO spec doesn't know anything about app engine so there's no
way that Key could be included in the list of types that are
automatically
included in the default fetch group.
Max
On Fri, Sep 4, 2009 at 1:32 PM, Yegor yegor.jba...@gmail.com wrote:
Just so you know, I think I have solved the problem by setting
defaultFetchGroup=true on the Key property:
@Persistent(defaultFetchGroup=true)
private Key text;
Might have something to do with the recently closed issue #58 Queries
don't respect fetch groups:
http://code.google.com/p/datanucleus-appengine/issues/detail?id=58
What's puzzling is that I have unowned relationships all over the
application, however only one class - CMSPage - fails to retrieve the
Key properties.
I am not sure why Key is not automatically in the default fetch group.
Key is not an entity class. It should be ok to fetch it non-lazily by
default.
Yegor
On Sep 4, 1:21 pm, Yegor yegor.jba...@gmail.com wrote:
Hi,
I am experiencing a problem after upgrading to Java SDK 1.2.5. In a
simple CMS application a page is stored as a CMSPage entity, which
points to its text saved as a DetachedText entity using a Key
property
(i.e. an unowned relationship) as follows:
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class CMSPage {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
@Persistent
private Key text;
public Key getId() {
return id;
}
public void setId(Key id) {
this.id = id;
}
public Key getText() {
return text;
}
public void setText(Key text) {
this.text = text;
}
}
The Key property text points to:
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class DetachedText {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
@Persistent
private Text content;
public DetachedText(Text content) {
this.content = content;
}
public Key getId() {
return id;
}
public Text getContent() {
return content;
}
}
NOTE: I have removed other properties and code that I found unrelated
to the problem
After saving the page I can see the text field populated in the
development console. The value shows as DetachedText(5). I also
verified that the DetachedText entity exists and its ID equals 5.
However, after I retrieve CMSPage from the datastore using a
javax.jdo.Query the text field in the retrieved object is null
(both
the Eclipse debugger and the application throwing NPE confirm it).
What am I doing wrong?
Any pointers will be appreciated.
Thanks,
Yegor
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[appengine-java] Re: support for task queues in development environment?
Hi Vince, In order to get the task queue into the 1.2.5 release we had to take a shortcut with the local development environment. Tasks execute automatically in production but not locally. However, in the local environment you can kick off your tasks manually by visiting the task queue admin console page, accessible via a link off of http://localhost:8080/_ah/admin We thought we had this properly documented but it appears we do not. I've filed a bug and we'll get this taken care of quickly. Sorry for the trouble. Thanks, Max On Sun, Sep 6, 2009 at 9:33 AM, Vince Bonfanti vbonfa...@gmail.com wrote: Task queues are working properly when I deploy my app to Google's servers, but never get executed in my development environment (Eclipse Galileo). There are no errors, no logs, no indication of what's going wrong. Queue.add() returns successfully, but my tasks never get executed. I'm running the exact same code in development and in production. Any clues, or any way for me to figure out what's going wrong? Are task queues supported in the development environment? Thanks. Vince --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Master/Detail relations and redundant data handling
Based on the Max Ross I/O video on Persistence, I understand the best practice regarding handling of Master/Detail relations is to place redundant Master data in the Detail row. Same would apply to any type of relation (1-to-1, 1-to-many). So for example if I have an entity Person relating as 1-to-many with another entity Address, then instead of just a simple FK like Address.personId I am supposed to also include redundant fields like Address.lastName, Address.firstName and so on depending on how I display/process on Address data in the app. Therefore, when reading Address data I would NOT necessarily have to perform another read to the Master just to get LastName/FirstName, etc. The problem is if I have 10 such relations with Person and JDO does NOT allow me to declare an object we'll call PersonFK containing these fields (personId, lastName, firstName, etc), then we quickly have a code maintenance nightmare for our app since any significant app can have 100's of FKs to manage and all these fields will NOT be coded in an Object Oriented sense. So in my example, if I have to add another redundant field for Person FKs such as SSN or change behavior of any existing one of these redundant fields for Person, then I have at least 10 touchpoints in the app to deal with, where good OO design mandates I should only have 1 touchpoint. Is this true or have I overlooked a feature in GAE JDO implementation that is NOT mentioned in the GAE docs? The closest concept indicated in the GAE docs are the Embedded Classes which only apply to 1 Entity...so they are quite useless from an OO perspective across many objects. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Query a collection of entities with their IDs
Hi,
I have a class Foo defined as below:
public class Foo{
@PrimaryKey
@Persistent(valueStrategy=
IdGeneratorStrategy.IDENTITY)
private String fooID;
...
}
Now, I have a list of IDs of the Foo entities, is it possible to retrieve
the corresponding collection of Foo entities in a single query? I found the
in the documentation, it says logic or and IN are not supported in the
java version app engine sdk, although it is supported in the python version.
Thanks in advance :-)
--
Best Regards
Robin (邹志乐）
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