[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
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/devtest...
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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