Still trying to resolve this issue... and I think I have made some
progress in ZERO'ing in on a reduced version of the issue.
The following code works fine:
public class BaseActionBean implements ActionBean {
@SpringBean protected ModalityDao modalityDao;
...
@Repository("modalityDao")
public class ModalityDaoImpl extends BaseDaoImpl<Modality, Integer>
implements ModalityDao {
public List<Modality> findAll() {
return (this.load());
}
However if I add a @PostConstruct on the above DAO as follows I get the
exception reported previously (see below again):
public class BaseActionBean implements ActionBean {
@SpringBean protected ModalityDao modalityDao;
...
@Repository("modalityDao")
public class ModalityDaoImpl extends BaseDaoImpl<Modality, Integer>
implements ModalityDao {
public List<Modality> findAll() {
return (this.load());
}
@PostConstruct
private void init() {
this.findAll();
}
It would appear that Spring's interceptor is doing its work BEFORE
Stripersist's interceptor gets its chance to initialize.
Because in digging through the Stripersist code we have:
/**
* Called by Stripes during initialization.
*/
public void init(Configuration configuration)
...
URL url =
Thread.currentThread().getContextClassLoader().getResource("/META-INF/persistence.xml");
...
init(url);
... and in turn init(url) calls ...
public void init(URL xml)
...
entityManagerFactories = new ConcurrentHashMap<String,
EntityManagerFactory>();
and that would clearly appear that entityManagerFactories is initialized
however it is NULL when we run the 2nd code above.
It would APPEAR we want the Stripersist interceptor to initialize BEFORE
the Spring interceptor.
Anyone know how we can accomplish this besides creating a Spring-Stripes
extension class that simply calls them in the desired order???
--Nikolaos
Nikolaos Giannopoulos wrote:
Freddy (and Aaron),
Offhand THANK YOU for the help! While it DID help I'm afraid I'm not
there yet... .
So I added the @PostConstruct annotation (and
<context:annotation-config /> in the applicationContext.xml to
register things) and have the following code:
@Service("modalityService")
public class ModalityServiceImpl implements ModalityService {
@Autowired
private ModalityDao modalityDao;
private ModalityCache modalityCache;
public ModalityServiceImpl() {
}
@PostConstruct
public void initService() {
List<Modality> modalityList = this.modalityDao.findAll();
this.modalityCache = new ModalityCache();
this.modalityCache.init(modalityList);
}
And the @PostConstruct indeed helped as the initService method is
getting executed however now I am back to the issue with Stripersist
generating a NPE in the following method call:
/**
* Finds the EntityManagerFactory which is associated with the
specified
* persistence unit. Normally you shouldn't use this class because
* Stripersist won't clean up any EntityManagers that you create.
*
* @param persistenceUnit the name of the persistence unit
* @return an EntityManagerFactory or null
*/
public static EntityManagerFactory getEntityManagerFactory(String
persistenceUnit)
{
return entityManagerFactories.get(persistenceUnit);
}
Where: entityManagerFactories is NULL!!!!! So it is almost like even
though the @PostConstruct annotated method gets invoked on bean post
creation a layer of the onion has been lifted and now the problem
appears that Stripersist hasn't completed its initialization. I have
to think there MUST be a way to solve this!!! AHhhhhh???
Full stack trace below....
Many Thanks,
--Nikolaos
[#|2010-05-26T14:07:50.795-0400|INFO|glassfishv3.0|javax.enterprise.system.std.com.sun.enterprise.v3.services.impl|_ThreadID=11;_ThreadName=FelixStartLevel;|[14:07:50,774]
ERROR
org.springframework.web.context.ContextLoader.initWebApplicationContext
- Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error
creating bean with name 'modalityService': Invocation of init method
failed; nested exception is java.lang.NullPointerException
at
org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:147)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:350)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1331)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
at
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728)
at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:380)
at
org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255)
at
org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199)
at
org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45)
at
org.apache.catalina.core.StandardContext.contextListenerStart(StandardContext.java:4591)
at
com.sun.enterprise.web.WebModule.contextListenerStart(WebModule.java:535)
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:5193)
at com.sun.enterprise.web.WebModule.start(WebModule.java:499)
at
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:928)
at
org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:912)
at
org.apache.catalina.core.StandardHost.addChild(StandardHost.java:694)
at
com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1933)
at
com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1605)
at com.sun.enterprise.web.WebApplication.start(WebApplication.java:90)
at org.glassfish.internal.data.EngineRef.start(EngineRef.java:126)
at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:241)
at
org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:236)
at
com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:339)
at
com.sun.enterprise.v3.server.ApplicationLoaderService.processApplication(ApplicationLoaderService.java:340)
at
com.sun.enterprise.v3.server.ApplicationLoaderService.postConstruct(ApplicationLoaderService.java:163)
at
com.sun.hk2.component.AbstractWombImpl.inject(AbstractWombImpl.java:174)
at
com.sun.hk2.component.ConstructorWomb$1.run(ConstructorWomb.java:87)
at java.security.AccessController.doPrivileged(Native Method)
at
com.sun.hk2.component.ConstructorWomb.initialize(ConstructorWomb.java:84)
at
com.sun.hk2.component.AbstractWombImpl.get(AbstractWombImpl.java:77)
at
com.sun.hk2.component.SingletonInhabitant.get(SingletonInhabitant.java:58)
at com.sun.hk2.component.LazyInhabitant.get(LazyInhabitant.java:107)
at
com.sun.hk2.component.AbstractInhabitantImpl.get(AbstractInhabitantImpl.java:60)
at
com.sun.enterprise.v3.server.AppServerStartup.run(AppServerStartup.java:236)
at
com.sun.enterprise.v3.server.AppServerStartup.start(AppServerStartup.java:128)
at com.sun.enterprise.module.bootstrap.Main.launch(Main.java:457)
at com.sun.enterprise.module.bootstrap.Main.launch(Main.java:401)
at org.jvnet.hk2.osgiadapter.HK2Main.start(HK2Main.java:125)
at
org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:640)
at org.apache.felix.framework.Felix.activateBundle(Felix.java:1700)
at org.apache.felix.framework.Felix.startBundle(Felix.java:1622)
at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:915)
at org.jvnet.hk2.osgimain.Main.start(Main.java:140)
at
org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:640)
at org.apache.felix.framework.Felix.activateBundle(Felix.java:1700)
at org.apache.felix.framework.Felix.startBundle(Felix.java:1622)
at
org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1077)
at
org.apache.felix.framework.StartLevelImpl.run(StartLevelImpl.java:264)
at java.lang.Thread.run(Thread.java:637)
Caused by: java.lang.NullPointerException
at
org.stripesstuff.stripersist.Stripersist.getEntityManagerFactory(Stripersist.java:401)
at
org.stripesstuff.stripersist.Stripersist.getEntityManager(Stripersist.java:495)
at
org.lightagents.ws.dao.impl.stripersist.BaseDaoImpl.load(BaseDaoImpl.java:70)
at
org.lightagents.ws.dao.impl.stripersist.ModalityDaoImpl.load(ModalityDaoImpl.java:50001)
at
org.lightagents.ws.dao.impl.stripersist.BaseDaoImpl.load(BaseDaoImpl.java:39)
at
org.lightagents.ws.dao.impl.stripersist.ModalityDaoImpl.load(ModalityDaoImpl.java:50001)
at
org.lightagents.ws.dao.impl.stripersist.ModalityDaoImpl.findAll(ModalityDaoImpl.java:20)
at
org.lightagents.ws.service.impl.ModalityServiceImpl.initService(ModalityServiceImpl.java:35)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:297)
at
org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:250)
at
org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:144)
... 57 more
|#]
Freddy Daoud wrote:
Hi Nikolaos,
I guess what I need is a WAY to perform POST initialization on this
Spring managed Service object. If I was dealing with an ActionBean then
an @AFTER on a particular life cycle event I imagine would do the trick
but this is not an Action Bean.
You are right, it is a bad idea to do any work in the constructor in
this case; you need to let Spring finish its wiring.
Indeed there is a standard annotation for doing post-initialization
work:
javax.annotation.PostConstruct. Spring recognizes this annotation when
its
annotation post processor is registered.[1]
So all you need is something like:
@PostConstruct
public void init() {
// do initialization work
// the name of the method can be something else than 'init'
}
I use this mechanism a lot and it works well.
Hope that helps.
Cheers,
Freddy
[1]:
http://static.springsource.org/spring/docs/2.5.x/reference/beans.html#beans-postconstruct-and-predestroy-annotations
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