EJB client with DI - @EJB injection doesn't work

[Hardik Mehta]

I am using glassfish V3 container.

I have deployed a very simple stateful EJB which is accessible by a client which uses global jndi lookup. But it is not accessible using the @EJB (DI) method.

Also the commandline described in glassfish documentation and other books is also not working for running the client in the ACC (Application client container).

Here the Client code:

package com.hardik.mejb;

import javax.ejb.EJB;

public class CountClientAcc {
	
	@EJB
	public static Count count;
	
	public static void main(String[] args) {
		try {
			count.set(10);
			System.out.println("Count is: "+ count.count());
			
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

The bean is code is like following:

package com.hardik.mejb;

import javax.ejb.Remote;
import javax.ejb.Remove;
import javax.ejb.Stateful;
import javax.interceptor.Interceptors;


@Stateful
@Remote(Count.class)
@Interceptors(CountCallBacks.class)
public class CountBean implements Count {
	
	/**
	 * Current counter is our conversational state
	 */
	private int val;

	@Override
	public int count() {
		System.out.println("count():");
		return ++val;
	}

	/**
	 * The remove method is annotated so the container knows,
	 * it can remove the bean after this method is called.
	 */
	@Override
	@Remove
	public void remove() {
		System.out.println("remove():");
	}

	@Override
	public void set(int val) {
		this.val = val;
		System.out.println("set():");

	}

}

After deploying the bean in the container. I tried following commandlines to run the client.

1. This is described in glassfish documentation and other online material.

$ appclient -client count-client-acc.jar
java.lang.IllegalArgumentException: URI scheme is not "file"
        at java.io.File.<init>(File.java:366)
        at com.sun.enterprise.deployment.util.ConnectorAnnotationDetector.hasAnnotationInArchive(ConnectorAnnotationDetector.java:65)
        at com.sun.enterprise.deployment.archivist.ConnectorArchivist.postHandles(ConnectorArchivist.java:116)
        at com.sun.enterprise.deployment.archivist.ArchivistFactory.getPrivateArchivistFor(ArchivistFactory.java:165)
        at com.sun.enterprise.deployment.archivist.ArchivistFactory.getPrivateArchivistFor(ArchivistFactory.java:131)
        at com.sun.enterprise.deployment.archivist.ArchivistFactory.getArchivist(ArchivistFactory.java:79)
        at org.glassfish.appclient.client.acc.UndeployedLaunchable.newUndeployedLaunchable(UndeployedLaunchable.java:84)
        at org.glassfish.appclient.client.acc.Launchable$LauchableUtil.newLaunchable(Launchable.java:114)
        at org.glassfish.appclient.client.acc.AppClientContainerBuilder.newContainer(AppClientContainerBuilder.java:161)
        at org.glassfish.appclient.client.acc.agent.AppClientContainerAgent.createContainerForAppClientArchiveOrDir(AppClientContainerAgent.java:407)
        at org.glassfish.appclient.client.acc.agent.AppClientContainerAgent.createContainer(AppClientContainerAgent.java:377)
        at org.glassfish.appclient.client.acc.agent.AppClientContainerAgent.premain(AppClientContainerAgent.java:225)
        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 sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:323)
        at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:338)

2. This works for me when I run the jndi lookup client.

$ appclient -client -cp "../../CountBean/dist/count-bean.jar:count-client-acc.jar" com.hardik.mejb.CountClientAcc 
Jul 6, 2009 3:58:10 PM com.sun.enterprise.security.appclient.AppClientSecurityInfoImpl initializeSecurity
INFO: acc.secmgroff
java.lang.NullPointerException
        at com.hardik.mejb.CountClientAcc.main(Unknown Source)

Am I making some mistake ?

[Jaikiran Pai]

Hardik,

Please post the contents of the MANIFEST.MF file of count-client-acc.jar

[Hardik Mehta]

Here the contents:

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.7.1
Created-By: 11.3-b02 (Sun Microsystems Inc.)

[Ray Blue]

As far as I can see you are trying to DI a stateful session bean. You will have to use lookup instead of injection. Can anyone paste some lookup example, because I have the same problem right now ;) My JNDI lookup works in JBoss but unforunately not in GlassFish. Where is the difference?

[Hardik Mehta]

Why shouldn't DI work for stateful beans ? On glassfish forums I was told, may be it is due to the following bug...
https://glassfish.dev.java.net/issues/show_bug.cgi?id=8631

[Manuel Alberto Quero]

Hi Hardik,

I think that the reason why it is not working is because of the way you are using Dependency injection (DI).

DI can only be used by classes which are managed by containers (EJB, servlets), i.e., it is not possible to use DI (@EJB) in your client because it is non-managed.

Morover, DI is intended to "inject" local references (those references obtained from the java:comp/env context) so I don't think you can inject the remote reference of your CountBean.

So to get DI working I think you could try this:
1) Use as a client another EJB or a servlet
2) Define a local interface for your CountBean

Hope this helps,

Manuel

[Hardik Mehta]

Thanks Manuel, for the the explanation.

What I forgot to mention in my first post (which I thought would be assumed, my fault) is that I also deploy the client in the container with the bean. This means and it is also written in the book, that it is deployed in the container (Application Client Container) and DI should be available for that client. I followed this documentation to deploy on glassfish.
http://docs.sun.com/app/docs/doc/820-7693/beaem?l=en&a=view&q=application+client


Following the similar documentation for JBOSS here, I could get the same client working.
http://www.jboss.org/community/wiki/HowtouseanapplicationclientinJBoss-5