Thank you for answering. I tried to create another project, and I now
consider a Dog entity, but the problem is exactly the same as before. My
goal is still to query my entities filtering the name. Here is my code:
@SuppressWarnings("unchecked")
@ApiMethod(name = "getDogByName", path = "dog/byname/{name}")
public List<Dog> getDogByName(@Named("name") String name) {
PersistenceManager mgr = getPersistenceManager();
List<Dog> candidates = null;
Query q = mgr.newQuery(Dog.class);
q.setFilter("name == nameParam");
q.declareParameters("String nameParam");
try {
candidates = (List<Dog>) q.execute(name);
} finally {
q.closeAll();
mgr.close();
}
return candidates;
}
Each request to my API works (the ones generated by Cloud Endpoints) except
this one. When I do a GET request
at https://myappid.appspot.com/_ah/api/dogendpoint/v1/dog/byname/nadir,
here is what my dashboard logs send me back:
Uncaught exception from servlet
> java.io.IOException:
> com.google.appengine.repackaged.org.codehaus.jackson.map.JsonMappingException:
> Object Manager has been closed (through reference chain:
> java.util.HashMap["items"])
> at
> com.google.api.server.spi.response.ServletResponseResultWriter.writeValueAsString(ServletResponseResultWriter.java:187)
> at
> com.google.api.server.spi.response.ServletResponseResultWriter.write(ServletResponseResultWriter.java:73)
> at
> com.google.api.server.spi.SystemService.invokeServiceMethod(SystemService.java:386)
> at
> com.google.api.server.spi.SystemServiceServlet.execute(SystemServiceServlet.java:127)
> at
> com.google.api.server.spi.SystemServiceServlet.doPost(SystemServiceServlet.java:85)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
> at
> com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:125)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:60)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
> at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
> at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
> at
> com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:254)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at org.mortbay.jetty.Server.handle(Server.java:326)
> at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
> at
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
> at
> com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> at
> com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:146)
> at
> com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:484)
> at
> com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:438)
> at
> com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:445)
> at
> com.google.tracing.CurrentContext.runInContext(CurrentContext.java:220)
> at
> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:309)
> at
> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:301)
> at
> com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:442)
> at
> com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
> at java.lang.Thread.run(Thread.java:724)
> Caused by:
> com.google.appengine.repackaged.org.codehaus.jackson.map.JsonMappingException:
> Object Manager has been closed (through reference chain:
> java.util.HashMap["items"])
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.JsonMappingException.wrapWithPath(JsonMappingException.java:218)
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.JsonMappingException.wrapWithPath(JsonMappingException.java:183)
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.ser.std.SerializerBase.wrapAndThrow(SerializerBase.java:140)
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.ser.std.MapSerializer.serializeFields(MapSerializer.java:266)
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.ser.std.MapSerializer.serialize(MapSerializer.java:186)
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.ser.std.MapSerializer.serialize(MapSerializer.java:23)
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.ser.StdSerializerProvider._serializeValue(StdSerializerProvider.java:610)
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.ser.StdSerializerProvider.serializeValue(StdSerializerProvider.java:256)
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.ObjectWriter._configAndWriteValue(ObjectWriter.java:456)
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.ObjectWriter.writeValueAsString(ObjectWriter.java:393)
> at
> com.google.api.server.spi.response.ServletResponseResultWriter.writeValueAsString(ServletResponseResultWriter.java:183)
> ... 38 more
> Caused by: org.datanucleus.exceptions.NucleusUserException: Object Manager
> has been closed
> at
> org.datanucleus.ObjectManagerImpl.assertIsOpen(ObjectManagerImpl.java:5450)
> at
> org.datanucleus.ObjectManagerImpl.findObject(ObjectManagerImpl.java:2816)
> at
> com.google.appengine.datanucleus.EntityUtils.entityToPojo(EntityUtils.java:1014)
> at
> com.google.appengine.datanucleus.query.DatastoreQuery$2.apply(DatastoreQuery.java:229)
> at
> com.google.appengine.datanucleus.query.DatastoreQuery$2.apply(DatastoreQuery.java:226)
> at
> com.google.appengine.datanucleus.query.LazyResult.resolveNext(LazyResult.java:96)
> at
> com.google.appengine.datanucleus.query.LazyResult$LazyAbstractListIterator.computeNext(LazyResult.java:229)
> at
> com.google.appengine.datanucleus.query.AbstractIterator.tryToComputeNext(AbstractIterator.java:131)
> at
> com.google.appengine.datanucleus.query.AbstractIterator.hasNext(AbstractIterator.java:126)
> at
> com.google.appengine.datanucleus.query.LazyResult$AbstractListIterator.hasNext(LazyResult.java:183)
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:46)
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:23)
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:86)
> at
> com.google.appengine.repackaged.org.codehaus.jackson.map.ser.std.MapSerializer.serializeFields(MapSerializer.java:262)
> ... 45 more
>
>
Le mercredi 10 décembre 2014 07:25:20 UTC+1, Vinny P a écrit :
>
> On Sun, Dec 7, 2014 at 3:12 AM, <[email protected] <javascript:>> wrote:
>
>> When I call this API method and give it a name parameter (which does
>> exist in my datastore) it sends me nothing back but a 404 error.
>>
>
>
> If you look at your App Engine logs (go to cloud.google.com/console >
> click on your application ID > Compute > App Engine > Logs) do you see any
> exception messages or error text recorded in an error log? If so, can you
> post the entire exception text here, including the request log headers?
>
>
> -----------------
> -Vinny P
> Technology & Media Consultant
> Chicago, IL
>
> App Engine Code Samples: http://www.learntogoogleit.com
>
>
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