Can't get SessionContext on EJB

问题

I can't get a SessionContext object on an EJB. I've tried all the options suggested on 4 Ways to Get EJBContext in EJB 3 and none of them worked. For example, the following code in my project...

@Stateful
public class SecurityService {
    @Resource
    private SessionContext context;

    @PostConstruct
    public void init() {
    }
}

... generates the following exception during deploy:

[#|2012-02-28T14:35:02.805-0300|SEVERE|glassfish3.1.1|javax.enterprise.system.core.com.sun.enterprise.v3.server|_ThreadID=18;_ThreadName=admin-thread-pool-4848(5);|The log message is null.
java.lang.NullPointerException
    at com.sun.appserv.connectors.internal.api.AppSpecificConnectorClassLoaderUtil.detectResourceInRA(AppSpecificConnectorClassLoaderUtil.java:266)
    at com.sun.appserv.connectors.internal.api.AppSpecificConnectorClassLoaderUtil.processDescriptorForRAReferences(AppSpecificConnectorClassLoaderUtil.java:211)
    at com.sun.appserv.connectors.internal.api.AppSpecificConnectorClassLoaderUtil.processDescriptorForRAReferences(AppSpecificConnectorClassLoaderUtil.java:130)
    at com.sun.appserv.connectors.internal.api.AppSpecificConnectorClassLoaderUtil.detectReferredRARs(AppSpecificConnectorClassLoaderUtil.java:118)
    at com.sun.appserv.connectors.internal.api.ConnectorClassLoaderServiceImpl.getConnectorClassLoader(ConnectorClassLoaderServiceImpl.java:111)
    at com.sun.enterprise.v3.server.ClassLoaderHierarchyImpl.getConnectorClassLoader(ClassLoaderHierarchyImpl.java:117)

If I remove the @Resource annotation it deploys, but does not work (i've tried with JNDI and the other methods cited before).

I'm using Glassfish 3.1.1, and my project is JSF with CDI and EJB locally to services with JPA. I've tried injecting SessionContext on CDI beans but received the same errors. My EJB are configured with annotations, and my beans.xml have no configurations (but exists).

One strange thing is that with JNDI lookup I've managed to get an object of type SessionContextImpl on path java:/comp/EJBContext on the @PostConstruct init() method. BUT, it goes to null as soon as another EJB method is called (?) and it does not contain user's roles data (a call to isCallerInRole() throws an exception). Also, it is not an EJBContext object.

I'm packaging everything in a WAR using Maven, and the dependency of Java EE is marked as provided, as the following shows:

<dependency>
    <groupId>javax</groupId>
    <artifactId>javaee-web-api</artifactId>
    <version>6.0</version>
    <scope>provided</scope>
</dependency>

It seems to me that there is no SessionContext (EJBCOntext) been provided by the container at all. I don't know even if that is possible, and I have no idea on how to solve this.

Please, If you have ANY idea about this, I'll be glad to hear it. Thank you.

回答1:

If your Principal has logged in using j_security_check, you can inject the SecurityContext in an EJB, or in a ManagedBean, and retrieve Principal's and role's information like this:

@Context private SecurityContext context;
....
boolean isInRole = context.isUserInRole("A role");
Principal p = context.getUserPrincipal();

回答2:

Well, I've upgraded to Glassfish 3.1.2 and the problem was solved. Now I can inject javax.ejb.SessionContext as expected.

Special thanks to @perissf for the help.

来源：https://stackoverflow.com/questions/9487185/cant-get-sessioncontext-on-ejb

标签

ejb

glassfish-3

cdi