Spring injecting EJB3 SLSB results in NPE

[freiser]

Hello,

I've deployed a simple slsb under JBoss 5.1.0 and want to access it with a minimalistic client (proof of concept).

When doing the JNDI lookup without spring everything works fine.
When using Spring 2.5 and the jee:jndi-lookup tag, then I get a NullPointerException:

Exception in thread "main" java.lang.NullPointerException
	at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:379)
	at org.jboss.ejb3.session.InvokableContextClassProxyHack._dynamicInvoke(InvokableContextClassProxyHack.java:53)
	at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:91)
	at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
	at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:891)
	at org.jboss.remoting.transport.socket.ServerThread.completeInvocation(ServerThread.java:744)
	at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:697)
	at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:524)
	at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:232)
	at org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:163)
	at org.jboss.remoting.Client.invoke(Client.java:1634)
	at org.jboss.remoting.Client.invoke(Client.java:548)
	at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:62)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
	at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:67)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
	at org.jboss.ejb3.security.client.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:65)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
	at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:74)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
	at org.jboss.aspects.remoting.PojiProxy.invoke(PojiProxy.java:61)
	at $Proxy4.invoke(Unknown Source)
	at org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:207)
	at org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:164)
	at $Proxy2.test(Unknown Source)
	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 org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:198)
	at $Proxy3.test(Unknown Source)
	at MainClass.testEjb(MainClass.java:24)
	at Client.main(Client.java:9)
	at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:74)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
	at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:67)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
	at org.jboss.ejb3.security.client.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:65)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
	at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:74)
	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
	at org.jboss.aspects.remoting.PojiProxy.invoke(PojiProxy.java:61)
	at $Proxy4.invoke(Unknown Source)
	at org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:207)
	at org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:164)
	at $Proxy2.test(Unknown Source)
	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 org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:198)
	at $Proxy3.test(Unknown Source)
	at MainClass.testEjb(MainClass.java:24)
	at Client.main(Client.java:9)

applicationContext.xml:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:jee="http://www.springframework.org/schema/jee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/jee
           http://www.springframework.org/schema/jee/spring-jee-2.5.xsd">
	<jee:jndi-lookup id="wsTransactionTest"
		jndi-name="WSTransactionEAR/WSTransactionTest/remote" proxy-interface="com.inet_logistics.ejb.WSTransactionTestRemote"
		expected-type="com.inet_logistics.ejb.WSTransactionTestRemote" />

	<bean id="mainClass" class="MainClass">
		<property name="ttr" ref="wsTransactionTest" />
	</bean>
</beans>

MainClass.java:

import ejb.WSTransactionTestRemote;

public class MainClass {
	private WSTransactionTestRemote _oTtr;

	public void setTtr(WSTransactionTestRemote oTtr) {
		_oTtr = oTtr;
	}

	public void testEjb() {
		_oTtr.test("Hallo Welt!");
		System.out.println("Fertig!");
	}
}

WSTransactionTest.java:

package ejb;

import java.util.Properties;

import javax.ejb.Stateless;
import javax.ejb.TransactionAttribute;
import javax.ejb.TransactionAttributeType;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import entity.TestEntity;

/**
 * Session Bean implementation class WSTransactionTest
 */
@Stateless
public class WSTransactionTest implements WSTransactionTestRemote {
	@PersistenceContext(unitName = "WSTransactionEJB")
	private EntityManager em;
	private TestEntity _oTe;

	@TransactionAttribute(TransactionAttributeType.REQUIRED)
	public String test(String testString) {
		System.out.println("Starting test method.");
		_oTe = new TestEntity();
		_oTe.setText(testString);
		em.persist(_oTe);
		return testString;
	}
}

WSTransactionTestRemote.java:

package ejb;

import javax.ejb.Remote;

@Remote
public interface WSTransactionTestRemote {
	public String test(String testString);
}

What am I doing wrong?

With kind regards

freiser

[freiser]

I've found it!
I've used the JBoss-4.2.3.GA libs