On Oct 1, 2009, at 4:07 PM, Comerford, Sean wrote:
> Paul -
>
> You were correct in that was related to lazy fetch. I missed we were
> using
> lazy on season - guess I should have looked more closely at the
> stack trace!
>
> Thanks for debugging my code ;-)
>
> A related question though: is there an example of how you could
> leverage
> container managed persistence to have the jersey servlet somehow
> inject an
> entity manager in your resource?
>
Not currently. This support will be provided when Java EE 6 is
released. I am in the process of implementing the integration.
In the interim there are a couple of solutions:
1) Using something like Spring; or
2) Implement Jersey specific injectable providers to inject entity
manager (and also manage the closing when
the request goes out of scope).
Jersey has an injectable service called CloseableService:
https://jersey.dev.java.net/nonav/apidocs/1.1.2-ea/jersey/com/sun/jersey/spi/CloseableService.html
that you can add instances of java.io.Closeable to and the close
method on those instances will be called when the request goes out of
scope (after the JAXB bean has been serialized). You might find this
useful to deal with the lazy fetching.
Let me know i and i can provide more details on plugging in injectable
providers.
> Ps - I can't say enough how slick Jersey + JAXB is. Very cool stuff.
>
Thanks!
Paul.
> On 9/30/09 5:26 AM, "Paul Sandoz" <Paul.Sandoz_at_Sun.COM> wrote:
>
>> Hi Sean,
>>
>> How are you obtaining the entityManagerFactory?
>>
>> The error is occurring when the game instance is being marshaled by
>> JAXB. Notice that lazy initialization is being utilized by hibernate.
>> Thus i am wondering that by the time marshaling is being performed
>> the
>> persistent session has been closed.
>>
>> Is entityManagerFactory and entityManager fields of the resource
>> class? Are you performing any clean up in the resource class related
>> to the entityManager?
>>
>> Can you try quick experiment and attempt to directly invoke the
>> method
>> Season.getEndDate (i am guessing this from the stack trace). And/or
>> alternatively directly marshall out the game instance from within the
>> getGame method.
>>
>> Paul.
>>
>> On Sep 29, 2009, at 8:39 PM, Comerford, Sean wrote:
>>
>>> So I’ve a JPA entity BasketballGame that has a ManyToOne
>>> relationship with Season.
>>>
>>> I am able to successfully load a given game from the DB using this
>>> in both a Java main and Java servlet.
>>>
>>> But if stick the exact same code in a Jersey method, it throws the
>>> following exception:
>>>
>>> javax.persistence.EntityNotFoundException: Unable to find
>>> com.espn.sports.persistence.Season with id
>>> com.espn.sports.persistence.Season$Key_at_7db
>>>
>>>
>>> Again, exact same code in a standard servlet works fine but throws
>>> the exception when run via the Jersey servlet.
>>>
>>> Any guesses as to what could be up?
>>>
>>> FYI, the code looks like this.... Full stack trace at end but
>>> doesn’t seem that helpful to me:
>>>
>>> @GET
>>> @Path("/{gameId}")
>>> @Produces({"text/xml", "application/xml", "application/json"})
>>> public BasketballGame getGame(@PathParam("gameId") int gameId) {
>>> Long id = Long.valueOf(gameId);
>>>
>>> entityManager = entityManagerFactory.createEntityManager();
>>> BasketballGame game =
>>> entityManager.find(BasketballGame.class, id);
>>>
>>> if (game == null) {
>>> throw new NotFoundException("Error - no game found w/ id
>>> " + id);
>>> }
>>>
>>> return game;
>>> }
>>>
>>> javax.persistence.EntityNotFoundException: Unable to find
>>> com.espn.sports.persistence.Season with id
>>> com.espn.sports.persistence.Season$Key_at_7db
>>> at org.hibernate.ejb.Ejb3Configuration
>>> $
>>> Ejb3EntityNotFoundDelegate
>>> .handleEntityNotFound(Ejb3Configuration.java:113)
>>> at
>>> org
>>> .hibernate
>>> .proxy
>>> .AbstractLazyInitializer
>>> .checkTargetState(AbstractLazyInitializer.java:154)
>>> at
>>> org
>>> .hibernate
>>> .proxy
>>> .AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:
>>> 143)
>>> at
>>> org
>>> .hibernate
>>> .proxy
>>> .AbstractLazyInitializer
>>> .getImplementation(AbstractLazyInitializer.java:174)
>>> at
>>> org
>>> .hibernate
>>> .proxy
>>> .pojo
>>> .javassist
>>> .JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:190)
>>> at com.espn.sports.persistence.Season_$
>>> $_javassist_355.getEndDate(Season_$$_javassist_355.java)
>>> at com.espn.sports.persistence.Season
>>> $
>>> JaxbAccessorM_getEndDate_setEndDate_java_util_Date
>>> .get(MethodAccessor_Ref.java:52)
>>> at
>>> com
>>> .sun
>>> .xml.bind.v2.runtime.reflect.Accessor.getUnadapted(Accessor.java:
>>> 147)
>>> at com.sun.xml.bind.v2.runtime.reflect.TransducedAccessor
>>> $CompositeTransducedAccessorImpl.hasValue(TransducedAccessor.java:
>>> 245)
>>> at
>>> com
>>> .sun
>>> .xml
>>> .bind
>>> .v2
>>> .runtime
>>> .property
>>> .SingleElementLeafProperty
>>> .serializeBody(SingleElementLeafProperty.java:96)
>>> at
>>> com
>>> .sun
>>> .xml
>>> .bind
>>> .v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:
>>> 322)
>>> at
>>> com
>>> .sun
>>> .xml
>>> .bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:
>>> 681)
>>> at
>>> com
>>> .sun
>>> .xml
>>> .bind
>>> .v2
>>> .runtime
>>> .property
>>> .SingleElementNodeProperty
>>> .serializeBody(SingleElementNodeProperty.java:150)
>>> at
>>> com
>>> .sun
>>> .xml
>>> .bind
>>> .v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:
>>> 322)
>>> at
>>> com
>>> .sun
>>> .xml
>>> .bind
>>> .v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:
>>> 319)
>>> at
>>> com
>>> .sun
>>> .xml
>>> .bind
>>> .v2.runtime.XMLSerializer.childAsSoleContent(XMLSerializer.java:
>>> 589)
>>> at
>>> com
>>> .sun
>>> .xml
>>> .bind
>>> .v2.runtime.ClassBeanInfoImpl.serializeRoot(ClassBeanInfoImpl.java:
>>> 312)
>>> at
>>> com
>>> .sun
>>> .xml.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:
>>> 490)
>>> at
>>> com
>>> .sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:
>>> 328)
>>> at
>>> com
>>> .sun.xml.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:
>>> 257)
>>> at
>>> javax
>>> .xml
>>> .bind
>>> .helpers.AbstractMarshallerImpl.marshal(AbstractMarshallerImpl.java:
>>> 75)
>>> at
>>> com
>>> .sun
>>> .jersey
>>> .core
>>> .provider
>>> .jaxb
>>> .AbstractRootElementProvider
>>> .writeTo(AbstractRootElementProvider.java:167)
>>> at
>>> com
>>> .sun
>>> .jersey
>>> .core
>>> .provider
>>> .jaxb
>>> .AbstractRootElementProvider
>>> .writeTo(AbstractRootElementProvider.java:143)
>>> at
>>> com
>>> .sun
>>> .jersey
>>> .spi.container.ContainerResponse.write(ContainerResponse.java:
>>> 254)
>>> at
>>> com
>>> .sun
>>> .jersey
>>> .server
>>> .impl
>>> .application
>>> .WebApplicationImpl._handleRequest(WebApplicationImpl.java:724)
>>> at
>>> com
>>> .sun
>>> .jersey
>>> .server
>>> .impl
>>> .application
>>> .WebApplicationImpl.handleRequest(WebApplicationImpl.java:647)
>>> at
>>> com
>>> .sun
>>> .jersey
>>> .server
>>> .impl
>>> .application
>>> .WebApplicationImpl.handleRequest(WebApplicationImpl.java:638)
>>> at
>>> com
>>> .sun
>>> .jersey
>>> .spi.container.servlet.WebComponent.service(WebComponent.java:
>>> 309)
>>> at
>>> com
>>> .sun
>>> .jersey
>>> .spi
>>> .container.servlet.ServletContainer.service(ServletContainer.java:
>>> 425)
>>> at
>>> com
>>> .sun
>>> .jersey
>>> .spi
>>> .container.servlet.ServletContainer.service(ServletContainer.java:
>>> 590)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
>>> at
>>> org
>>> .apache
>>> .catalina
>>> .core
>>> .ApplicationFilterChain.servletService(ApplicationFilterChain.java:
>>> 427)
>>> at
>>> org
>>> .apache
>>> .catalina
>>> .core.StandardWrapperValve.invoke(StandardWrapperValve.java:
>>> 315)
>>> at
>>> org
>>> .apache
>>> .catalina
>>> .core.StandardContextValve.invokeInternal(StandardContextValve.java:
>>> 287)
>>> at
>>> org
>>> .apache
>>> .catalina
>>> .core.StandardContextValve.invoke(StandardContextValve.java:
>>> 218)
>>> at
>>> org
>>> .apache
>>> .catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
>>> at
>>> org
>>> .apache
>>> .catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
>>> at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
>>> at
>>> com
>>> .sun
>>> .enterprise
>>> .web
>>> .PESessionLockingStandardPipeline
>>> .invoke(PESessionLockingStandardPipeline.java:98)
>>> at
>>> org
>>> .apache
>>> .catalina.core.StandardHostValve.invoke(StandardHostValve.java:222)
>>> at
>>> org
>>> .apache
>>> .catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
>>> at
>>> org
>>> .apache
>>> .catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
>>> at
>>> org
>>> .apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
>>> 587)
>>> at
>>> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:
>>> 1093)
>>> at
>>> org
>>> .apache
>>> .catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:
>>> 166)
>>> at
>>> org
>>> .apache
>>> .catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
>>> at
>>> org
>>> .apache
>>> .catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
>>> at
>>> org
>>> .apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
>>> 587)
>>> at
>>> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:
>>> 1093)
>>> at
>>> org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:
>>> 291)
>>> at
>>> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter
>>> (DefaultProcessorTask.java:666)
>>> at
>>> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess
>>> (DefaultProcessorTask.java:597)
>>> at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process
>>> (DefaultProcessorTask.java:872)
>>> at
>>> com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask
>>> (DefaultReadTask.java:341)
>>> at
>>> com
>>> .sun
>>> .enterprise
>>> .web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:
>>> 263)
>>> at
>>> com
>>> .sun
>>> .enterprise
>>> .web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:
>>> 214)
>>> at com.sun.enterprise.web.portunif.PortUnificationPipeline
>>> $PUTask.doTask(PortUnificationPipeline.java:382)
>>> at
>>> com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:
>>> 264)
>>> at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run
>>> (SSLWorkerThread.java:106)
>>> |#]
>>>
>>> --
>>> Sean Comerford, Software Engineer
>>> ESPN.com Site Architecture Group
>>> Office: 860.766.6454 Cell: 860.329.5842
>>
>>
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>>
>
> --
> Sean Comerford, Software Engineer
> ESPN.com Site Architecture Group
> Office: 860.766.6454 Cell: 860.329.5842
>
>
> ---------------------------------------------------------------------
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>