Hello World! with Remote Stateless Session Bean

2020-06-20 05:17发布

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问题:

Good day! I'm newcomer in the JavaEE 6. I tried to create a started project with use of the following tutorial: Creating and Running an Application Client on the GlassFish Server. I created four projects step by step: JavaSE lib to store an EJB Remote Interface, an EJB Module and otherwise as ther're described in the tutorial.

My platform:

  • Distributor ID: Ubuntu Description: Ubuntu 10.10 Release: 10.10 Codename: maverick
  • jdk1.6.0_26
  • Netbean7.2(Build 201207171143)
  • GlassFish Server 3+

My remote interface 

    package ejb.started;
    //    
    import javax.ejb.Remote;
    //
    @Remote
    public interface StartedSessionBeanRemote {

        String getHelloWorld();

    }

Its implementation:

package ejb.started;
//
import javax.ejb.Stateless;
//
@Stateless(name="StartedSessionBeanRemote")
public class StartedSessionBean implements StartedSessionBeanRemote {

    @Override
    public String getHelloWorld() {
       return ("Hello world, EJB!");
    }

}

And the client code:

package startedentappclient;
//
import ejb.started.StartedSessionBeanRemote;
import javax.ejb.EJB;
//
public class AppClientMain {
    @EJB
    private static StartedSessionBeanRemote startedSessionBean;
    public static void main(String[] args) {
        System.err.println("EJB: "+startedSessionBean.getHelloWorld());
    }
}

When I try to run the Remote Client proj, I receive the following output:

ant -f /home/ilya/Workspace/git/workspace/StartedEntAppClient -DforceRedeploy=false run
init:
EJBRemoteInterface.init:
Deleting: /home/ilya/Workspace/git/workspace/EJBRemoteInterface/build/built-jar.properties
EJBRemoteInterface.deps-jar:
Updating property file: /home/ilya/Workspace/git/workspace/EJBRemoteInterface/build/built-jar.properties
EJBRemoteInterface.compile:
EJBRemoteInterface.jar:
deps-jar:
compile:
library-inclusion-in-archive:
dist:
pre-run-deploy:
Redeploying /home/ilya/Workspace/git/workspace/StartedEntAppClient/dist/StartedEntAppClient.jar
Initializing...
post-run-deploy:
run-deploy:
Copying 1 file to /home/ilya/Workspace/git/workspace/StartedEntAppClient/dist
Copying 2 files to /home/ilya/Workspace/git/workspace/StartedEntAppClient/dist/StartedEntAppClientClient
Warning: /home/ilya/Workspace/git/workspace/StartedEntAppClient/dist/gfdeploy/StartedEntAppClient does not exist.
com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Remote ejb-ref name=startedentappclient.AppClientMain/startedSessionBean,Remote 3.x interface =ejb.started.StartedSessionBeanRemote,ejb-link=null,lookup=,mappedName=,jndi-name=ejb.started.StartedSessionBeanRemote,refType=Session into class startedentappclient.AppClientMain: Lookup failed for 'java:comp/env/startedentappclient.AppClientMain/startedSessionBean' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl}
    at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:703)
    at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.inject(InjectionManagerImpl.java:470)
    at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectClass(InjectionManagerImpl.java:213)
    at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectClass(InjectionManagerImpl.java:205)
    at org.glassfish.appclient.client.acc.AppClientContainer$ClientMainClassSetting.getClientMainClass(AppClientContainer.java:625)
    at org.glassfish.appclient.client.acc.AppClientContainer.getMainMethod(AppClientContainer.java:517)
    at org.glassfish.appclient.client.acc.AppClientContainer.completePreparation(AppClientContainer.java:411)
    at org.glassfish.appclient.client.acc.AppClientContainer.prepare(AppClientContainer.java:319)
    at org.glassfish.appclient.client.AppClientFacade.prepareACC(AppClientFacade.java:278)
    at org.glassfish.appclient.client.acc.agent.AppClientContainerAgent.premain(AppClientContainerAgent.java:82)
    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)
Caused by: javax.naming.NamingException: Lookup failed for 'java:comp/env/startedentappclient.AppClientMain/startedSessionBean' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is javax.naming.NamingException: Exception resolving Ejb for 'Remote ejb-ref name=startedentappclient.AppClientMain/startedSessionBean,Remote 3.x interface =ejb.started.StartedSessionBeanRemote,ejb-link=null,lookup=,mappedName=,jndi-name=ejb.started.StartedSessionBeanRemote,refType=Session' .  Actual (possibly internal) Remote JNDI name used for lookup is 'ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote' [Root exception is javax.naming.NamingException: Lookup failed for 'ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is javax.naming.NameNotFoundException: ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote not found]]]
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:518)
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:455)
    at javax.naming.InitialContext.lookup(InitialContext.java:392)
    at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:599)
    ... 15 more
Caused by: javax.naming.NamingException: Exception resolving Ejb for 'Remote ejb-ref name=startedentappclient.AppClientMain/startedSessionBean,Remote 3.x interface =ejb.started.StartedSessionBeanRemote,ejb-link=null,lookup=,mappedName=,jndi-name=ejb.started.StartedSessionBeanRemote,refType=Session' .  Actual (possibly internal) Remote JNDI name used for lookup is 'ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote' [Root exception is javax.naming.NamingException: Lookup failed for 'ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is javax.naming.NameNotFoundException: ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote not found]]
    at com.sun.ejb.EjbNamingReferenceManagerImpl.resolveEjbReference(EjbNamingReferenceManagerImpl.java:191)
    at com.sun.enterprise.container.common.impl.ComponentEnvManagerImpl$EjbReferenceProxy.create(ComponentEnvManagerImpl.java:1109)
    at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:776)
    at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:744)
    at com.sun.enterprise.naming.impl.JavaURLContext.lookup(JavaURLContext.java:169)
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:498)
    ... 18 more
Caused by: javax.naming.NamingException: Lookup failed for 'ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is javax.naming.NameNotFoundException: ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote not found]
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:518)
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:455)
    at javax.naming.InitialContext.lookup(InitialContext.java:392)
    at com.sun.ejb.EjbNamingReferenceManagerImpl.resolveEjbReference(EjbNamingReferenceManagerImpl.java:186)
    ... 23 more
Caused by: javax.naming.NameNotFoundException: ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote not found
    at com.sun.enterprise.naming.impl.TransientContext.doLookup(TransientContext.java:248)
    at com.sun.enterprise.naming.impl.TransientContext.lookup(TransientContext.java:215)
    at com.sun.enterprise.naming.impl.SerialContextProviderImpl.lookup(SerialContextProviderImpl.java:77)
    at com.sun.enterprise.naming.impl.RemoteSerialContextProviderImpl.lookup(RemoteSerialContextProviderImpl.java:109)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie.dispatchToMethod(ReflectiveTie.java:144)
    at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:174)
    at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatchToServant(CorbaServerRequestDispatcherImpl.java:528)
    at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatch(CorbaServerRequestDispatcherImpl.java:199)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequestRequest(CorbaMessageMediatorImpl.java:1624)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:1486)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleInput(CorbaMessageMediatorImpl.java:990)
    at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:214)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:742)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.dispatch(CorbaMessageMediatorImpl.java:539)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.doWork(CorbaMessageMediatorImpl.java:2324)
    at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:497)
    at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:540)
Java Result: 1
run:
BUILD SUCCESSFUL (total time: 11 seconds)

I can't assume what's that problem. I built same projects on my second PC and all work successfully. That one has the same software platform.

回答1:

When you write:

@EJB
private static StartedSessionBeanRemote startedSessionBean;

your client tries to perform an injection of that EJB. In your case that obviously wasn't successful:

com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject...

You can help yourself by using mappedName construct. Rewrite these lines of your code in the following way:

@Stateless(mappedName="ejb/StartedSessionBeanRemote")
public class StartedSessionBean implements StartedSessionBeanRemote {

and

@EJB(mappedName="ejb/StartedSessionBeanRemote")
private static StartedSessionBeanRemote startedSessionBean;

Finally, make sure that your EJB is deployed before the client, because without the EJB client cannot inject it :)



回答2:

I believe you cannot access an EJB using the @EJB annotation from a main method because that method is not managed by the server. Instead, you should use JNDI.

How do I access a Remote EJB component from a stand-alone java client?



标签： jakarta-ee netbeans glassfish javabeans glassfish-3
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