[weld-issues] [JBoss JIRA] Created: (WELD-632) EMF Resource declaration in a static producer field of a Singleton EJB results in a null instance exception

[Sivakumar Thyagarajan (JIRA)]

EMF Resource declaration in a static producer field of a Singleton EJB results in a null instance exception
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                 Key: WELD-632
                 URL: https://jira.jboss.org/browse/WELD-632
             Project: Weld
          Issue Type: Bug
          Components: Producers (Methods, Fields and Disposers)
    Affects Versions: 1.0.1.Final
         Environment: GlassFish 3.1-trunk (integrates 1.1.0-01-glassfish branch of weld)
            Reporter: Sivakumar Thyagarajan
             Fix For: 1.1.0.BETA1


I have a developer test that thests the following scenario:
- Injection of an EMF into a Servlet. This EMF is produced through a producer field in a Singleton EJB in that war.

If the resource(JPA EMF) is declared by making a static field in a singleton EJB as a  producer field [1] 
and this EMF is injected in a servlet in the war, a null instance exception when the injected reference to the EMF is used [2].

I have attached the relevant beans with this bug report. 

[1]
A sample bean and a test case to reproduce is at https://svn.dev.java.net/svn/glassfish-svn/trunk/v2/appserv-tests/devtests/cdi/javaee-component-resources/jpa-resource-injection-with-singleton-ejb-producer/ 

Bean snippet:
> @javax.ejb.Singleton
> public class JPAResourceProducerSingletonEJB_StaticField {
>    @Produces @PersistenceUnit(unitName="pu1") @ProducedViaStaticField
>    public static EntityManagerFactory customerDatabasePersistenceUnit1;
> }
> 
> and I inject this EMF in the servlet as
>    @Inject
>    @ProducedViaStaticField
>    private EntityManagerFactory emf_static;
> 
> 
> [2]
> ---- server log snippet ----
> [#|2010-08-20T15:53:52.613+0530|WARNING|glassfish3.1|javax.enterprise.system.container.web.com.sun.enterprise.web|_ThreadID=14;_ThreadName=Thread-1;|StandardWrapperValve[mytest]: PWC1406: Servlet.service() for servlet mytest threw exception
> org.jboss.weld.exceptions.NullInstanceException: WELD-000044 Unable to obtain instance from org.jboss.weld.bean-/export/work/workspaces/gfv3/v3/distributions/glassfish/target/stage/glassfishv3/glassfish/domains/domain1/applications/cdi-jpa-resource-injection-in-singleton-ejb-web/-ProducerField-test.ejb.JPAResourceProducerSingletonEJB_StaticField.customerDatabasePersistenceUnit1
>    at org.jboss.weld.bean.builtin.CallableMethodHandler.invoke(CallableMethodHandler.java:55)
>    at org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:62)
>    at org.jboss.weldx.persistence.EntityManagerFactory_$$_WeldProxy.toString(EntityManagerFactory_$$_WeldProxy.java)
>    at java.lang.String.valueOf(String.java:2826)
>    at java.lang.StringBuilder.append(StringBuilder.java:115)
>    at test.servlet.JPAResourceInjectionServletFromSingletonEJB.doGet(JPAResourceInjectionServletFromSingletonEJB.java:105)
> ---- server log snippet ---


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