Hi,
I have an application scoped producer method together with a disposer
which sits in a @javax.inject.Singleton scoped class.
@Singleton
public class DbProducer implements Serializable {
@ApplicationScopedDb
@Produces
@ApplicationScoped
public NakedGraph getApplicationScopedNakedGraph() {
logger.info("produce Application scoped db");
NakedGraph db = createNakedGraph();
return db;
}
public void closeApplicationScoped(@Disposes @ApplicationScopedDb
NakedGraph db) {
logger.info("shutdown Application scoped db");
if (db != null) {
db.shutdown();
}
}
}
On shutting down jetty I get the following exception.
SEVERE: Exception thrown while destroying bean instance :
[Name:null,WebBeans Type:PRODUCERMETHOD,API
Types:[com.tinkerpop.blueprints.pgm.Graph,java.io.Serializable,org.nakeduml.tinker.runtime.NakedGraph,com.tinkerpop.blueprints.pgm.IndexableGraph,java.lang.Object,com.tinkerpop.blueprints.pgm.TransactionalGraph],Qualifiers:[javax.enterprise.inject.Any,org.nakeduml.tinker.runtime.ApplicationScopedDb]]
java.lang.NullPointerException
at
org.apache.webbeans.component.ProducerMethodBean.disposeDefault(ProducerMethodBean.java:346)
at
org.apache.webbeans.component.ProducerMethodBean.dispose(ProducerMethodBean.java:306)
at
org.apache.webbeans.component.ProducerMethodBean.destroyInstance(ProducerMethodBean.java:298)
at
org.apache.webbeans.component.AbstractOwbBean.destroyCreatedInstance(AbstractOwbBean.java:277)
at
org.apache.webbeans.portable.creation.AbstractProducer.dispose(AbstractProducer.java:91)
at
org.apache.webbeans.component.InjectionTargetWrapper.dispose(InjectionTargetWrapper.java:116)
at
org.apache.webbeans.component.AbstractOwbBean.destroy(AbstractOwbBean.java:242)
at
org.apache.webbeans.context.AbstractContext.destroyInstance(AbstractContext.java:257)
at
org.apache.webbeans.context.AbstractContext.destroy(AbstractContext.java:279)
at
org.apache.webbeans.web.context.WebContextsService.destroyApplicationContext(WebContextsService.java:485)
at
org.apache.webbeans.web.context.WebContextsService.endContext(WebContextsService.java:200)
at
org.apache.webbeans.web.context.WebContextsService.destroy(WebContextsService.java:155)
at
org.apache.webbeans.lifecycle.AbstractLifeCycle.stopApplication(AbstractLifeCycle.java:149)
at
org.apache.webbeans.web.lifecycle.WebContainerLifecycle.stopApplication(WebContainerLifecycle.java:87)
at
org.apache.webbeans.servlet.WebBeansConfigurationListener.contextDestroyed(WebBeansConfigurationListener.java:96)
at
org.eclipse.jetty.server.handler.ContextHandler.doStop(ContextHandler.java:679)
at
org.eclipse.jetty.servlet.ServletContextHandler.doStop(ServletContextHandler.java:143)
at
org.eclipse.jetty.webapp.WebAppContext.doStop(WebAppContext.java:473)
at
org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:83)
at
org.eclipse.jetty.server.handler.HandlerCollection.doStop(HandlerCollection.java:245)
at
org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:83)
at
org.eclipse.jetty.server.handler.HandlerWrapper.doStop(HandlerWrapper.java:101)
at org.eclipse.jetty.server.Server.doStop(Server.java:319)
at
org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:83)
at org.nakeduml.jetty.StartJetty$MonitorThread.run(StartJetty.java:92)
Some investigation shows that the base exception is a
"new ContextNotActiveException("WebBeans context with scope type
annotation @" + scopeType.getSimpleName() + " does not exist within
current thread");"
This exception however gets swallowed by the above exception that is
thrown in the finally part of ProducerMethodBean.disposeDefault.
The scope that is not active is javax.inject.Singleton
I subsequently replaced @Singleton with @ApplicationScope and then
everything works.
Should @Singleton also have worked and when should one use which annotation?
Thanks
Pieter
