Multiple EJBs with same name in different jars - deployment
I have an EAR file containing 2 ejb jar files. Each of the jar files has one EJB3.0 Stateless bean each:
MyApp.ear | |--- META-INF | | | |--- application.xml | | | |--- jboss-app.xml | | |--- appOneEjb.jar | | | |--- org/myapp/AppManagerBean.class | | |--- appTwoEjb.jar | | | |--- org/myapp/AppManagerBeanV2.class | | |--- common.jar | | | |--- org/myapp/AppManager.class
Both these stateless beans (AppManagerBeanV2.class and AppManagerBean.class) implement the same AppManager.class and more importantly the "name" attribute of the @Stateless annotation for both these beans is the same. However, these 2 beans are packaged in different jar files inside an EAR:
@Stateless (name="mybean")
@Remote (AppManager.class)
public class AppManagerBeanV2 implements AppManager {
public String getVersion() {
return "2.0";
}
}
@Stateless (name="mybean")
@Remote (AppManager.class)
public class AppManagerBean implements AppManager {
public String getVersion() {
return "1.0";
}
}
I could not find much documentation on the name attribute of @Stateless. But since the "name" is equivalent to the ejb-name in the ejb-jar.xml, i guess, the following (from the ejb-jar.xml dtd) holds true:
The ejb-name element specifies an enterprise bean's name. ... The name must be unique among the names of the enterprise beans in the same ejb-jar file.
So as per this definition, i guess i can have multiple EJBs with the same name, but in different jar files (as in my sample application). But when i deploy, this on JBoss-5 CR2 i get the following exception during deployment:
17:01:35,311 INFO [JBossASKernel] Created KernelDeployment for: another_ejb3.jar 17:01:35,311 INFO [JBossASKernel] installing bean: jboss.j2ee:ear=ZEJB3Persistence.ear,jar=another_ejb3.jar,name=mybean,service=EJB3 17:01:35,311 INFO [JBossASKernel] with dependencies: 17:01:35,311 INFO [JBossASKernel] and demands: 17:01:35,311 INFO [JBossASKernel] jboss.ejb:service=EJBTimerService 17:01:35,311 INFO [JBossASKernel] and supplies: 17:01:35,311 INFO [JBossASKernel] jndi:AppManagerRemoteV2 17:01:35,311 INFO [JBossASKernel] Class:org.myapp.ejb.AppManager 17:01:35,311 INFO [JBossASKernel] jndi:ZEJB3Persistence/mybean/remote-org.myapp.ejb.AppManager 17:01:35,311 INFO [JBossASKernel] jndi:ZEJB3Persistence/mybean/remote 17:01:35,311 INFO [JBossASKernel] Added bean(jboss.j2ee:ear=ZEJB3Persistence.ear,jar=another_ejb3.jar,name=mybean,service=EJB3) to KernelDeployment of: another_ejb3.jar 17:01:35,779 INFO [JBossASKernel] Created KernelDeployment for: myapp_ejb3.jar 17:01:35,795 INFO [JBossASKernel] installing bean: jboss.j2ee:ear=ZEJB3Persistence.ear,jar=myapp_ejb3.jar,name=mybean,service=EJB3 17:01:35,795 INFO [JBossASKernel] with dependencies: 17:01:35,795 INFO [JBossASKernel] and demands: 17:01:35,795 INFO [JBossASKernel] jboss.ejb:service=EJBTimerService 17:01:35,795 INFO [JBossASKernel] and supplies: 17:01:35,795 INFO [JBossASKernel] Class:org.myapp.ejb.AppManager 17:01:35,795 INFO [JBossASKernel] jndi:ZEJB3Persistence/mybean/remote-org.myapp.ejb.AppManager 17:01:35,795 INFO [JBossASKernel] jndi:AppManagerRemote 17:01:35,795 INFO [JBossASKernel] jndi:ZEJB3Persistence/mybean/remote 17:01:35,795 INFO [JBossASKernel] Added bean(jboss.j2ee:ear=ZEJB3Persistence.ear,jar=myapp_ejb3.jar,name=mybean,service=EJB3) to KernelDeployment of: myapp_ejb3.jar 17:01:35,795 INFO [JBossASKernel] installing bean: jboss.j2ee:ear=ZEJB3Persistence.ear,jar=myapp_ejb3.jar,name=UserManagerBean,service=EJB3 17:01:35,795 INFO [JBossASKernel] with dependencies: 17:01:35,795 INFO [JBossASKernel] and demands: 17:01:35,795 INFO [JBossASKernel] jboss.j2ee:ear=ZEJB3Persistence.ear,name=mybean,service=EJB3,* 17:01:35,795 INFO [JBossASKernel] persistence.unit:unitName=ZEJB3Persistence.ear/myapp_ejb3.jar#EJB3Persistence 17:01:35,795 INFO [JBossASKernel] jboss.ejb:service=EJBTimerService 17:01:35,795 INFO [JBossASKernel] and supplies: 17:01:35,795 INFO [JBossASKernel] Class:org.myapp.ejb.UserManagerRemote 17:01:35,795 INFO [JBossASKernel] jndi:ZEJB3Persistence/UserManagerBean/local-org.myapp.ejb.UserManagerLocal 17:01:35,795 INFO [JBossASKernel] Class:org.myapp.ejb.UserManagerLocal 17:01:35,795 INFO [JBossASKernel] jndi:ZEJB3Persistence/UserManagerBean/local 17:01:35,795 INFO [JBossASKernel] jndi:RemoteUserManagerBean 17:01:35,795 INFO [JBossASKernel] jndi:ZEJB3Persistence/UserManagerBean/remote-org.myapp.ejb.UserManagerRemote 17:01:35,795 INFO [JBossASKernel] jndi:testMappedNameJai 17:01:35,795 INFO [JBossASKernel] Added bean(jboss.j2ee:ear=ZEJB3Persistence.ear,jar=myapp_ejb3.jar,name=UserManagerBean,service=EJB3) to KernelDeployment of: myapp_ejb3.jar 17:01:37,186 INFO [SessionSpecContainer] Starting jboss.j2ee:ear=ZEJB3Persistence.ear,jar=another_ejb3.jar,name=mybean,service=EJB3 17:01:37,201 INFO [EJBContainer] STARTED EJB: org.myapp.ejb.impl.AppManagerBeanV2 ejbName: mybean 17:01:37,217 WARN [SessionSpecContainer] Populating JBoss-specific annotation metadata manually until done by deployers: jboss.j2ee:ear=ZEJB3Persistence.ear,jar=another_ejb3.jar,name=mybean,service=EJB3 17:01:37,608 INFO [SessionSpecContainer] Starting jboss.j2ee:ear=ZEJB3Persistence.ear,jar=myapp_ejb3.jar,name=mybean,service=EJB3 17:01:37,608 INFO [EJBContainer] STARTED EJB: org.myapp.ejb.impl.AppManagerBean ejbName: mybean 17:01:37,608 WARN [SessionSpecContainer] Populating JBoss-specific annotation metadata manually until done by deployers: jboss.j2ee:ear=ZEJB3Persistence.ear,jar=myapp_ejb3.jar,name=mybean,service=EJB3 17:01:37,639 INFO [SessionSpecContainer] Stopping jboss.j2ee:ear=ZEJB3Persistence.ear,jar=myapp_ejb3.jar,name=mybean,service=EJB3 17:01:37,639 INFO [EJBContainer] STOPPED EJB: org.myapp.ejb.impl.AppManagerBean ejbName: mybean 17:01:37,670 ERROR [AbstractKernelController] Error installing to Start: name=jboss.j2ee:ear=ZEJB3Persistence.ear,jar=myapp_ejb3.jar,name=mybean,service=EJB3 state=Create java.lang.RuntimeException: Could not bind Reference Class Name: Proxy for: org.myapp.ejb.AppManager Type: ProxyFactoryKey Content: ProxyFactory/AppManagerRemote Type: EJB Container Name Content: jboss.j2ee:ear=ZEJB3Persistence.ear,jar=myapp_ejb3.jar,name=mybean,service=EJB3 Type: Remote Business Interface Content: org.myapp.ejb.AppManager Type: Remoting Host URL Content: socket://ps3346:3873/? into JNDI at "ZEJB3Persistence/mybean/remote-org.myapp.ejb.AppManager" at org.jboss.ejb3.proxy.jndiregistrar.JndiSessionRegistrarBase.bind(JndiSessionRegistrarBase.java:694) at org.jboss.ejb3.proxy.jndiregistrar.JndiSessionRegistrarBase.bind(JndiSessionRegistrarBase.java:674) at org.jboss.ejb3.proxy.jndiregistrar.JndiSessionRegistrarBase.bind(JndiSessionRegistrarBase.java:641) at org.jboss.ejb3.proxy.jndiregistrar.JndiSessionRegistrarBase.bindEjb(JndiSessionRegistrarBase.java:165) at org.jboss.ejb3.session.SessionSpecContainer.lockedStart(SessionSpecContainer.java:706) at org.jboss.ejb3.stateless.StatelessContainer.lockedStart(StatelessContainer.java:220) at org.jboss.ejb3.EJBContainer.start(EJBContainer.java:858) 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:585) at org.jboss.reflect.plugins.introspection.ReflectionUtils.invoke(ReflectionUtils.java:59) at org.jboss.reflect.plugins.introspection.ReflectMethodInfoImpl.invoke(ReflectMethodInfoImpl.java:150) at org.jboss.joinpoint.plugins.BasicMethodJoinPoint.dispatch(BasicMethodJoinPoint.java:66) at org.jboss.kernel.plugins.dependency.KernelControllerContextAction$JoinpointDispatchWrapper.execute(KernelControllerContextAction.java:241) at org.jboss.kernel.plugins.dependency.ExecutionWrapper.execute(ExecutionWrapper.java:47) at org.jboss.kernel.plugins.dependency.KernelControllerContextAction.dispatchExecutionWrapper(KernelControllerContextAction.java:109) at org.jboss.kernel.plugins.dependency.KernelControllerContextAction.dispatchJoinPoint(KernelControllerContextAction.java:70) at org.jboss.kernel.plugins.dependency.LifecycleAction.installActionInternal(LifecycleAction.java:221) at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:54) at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:42) at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62) at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71) at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51) at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348) at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1598) at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934) at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1062) at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984) at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:774) at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:540) at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(BeanMetaDataDeployer.java:124) at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(BeanMetaDataDeployer.java:51) at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:62) at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:50) at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:169) at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1285) at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1003) at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1024) at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1056) at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:944) at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348) at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1598) at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934) at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1062) at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984) at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822) at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553) at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:627) at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:541) at org.jboss.system.server.profileservice.ProfileServiceBootstrap.loadProfile(ProfileServiceBootstrap.java:265) at org.jboss.system.server.profileservice.ProfileServiceBootstrap.start(ProfileServiceBootstrap.java:143) at org.jboss.bootstrap.AbstractServerImpl.start(AbstractServerImpl.java:409) at org.jboss.Main.boot(Main.java:209) at org.jboss.Main$1.run(Main.java:544) at java.lang.Thread.run(Thread.java:595) Caused by: javax.naming.NameAlreadyBoundException at org.jnp.server.NamingServer.bind(NamingServer.java:165) at org.jnp.server.NamingServer.bind(NamingServer.java:130) at org.jnp.server.NamingServer.bind(NamingServer.java:130) at org.jnp.interfaces.NamingContext.bind(NamingContext.java:593) at org.jnp.interfaces.NamingContext.bind(NamingContext.java:554) at org.jboss.util.naming.Util.bind(Util.java:105) at org.jboss.util.naming.Util.bind(Util.java:91) at org.jboss.ejb3.proxy.jndiregistrar.JndiSessionRegistrarBase.bind(JndiSessionRegistrarBase.java:689) ... 55 more
Am i doing the right thing by having multiple beans with the same name? If yes, then it looks like when creating the jndi names for the interface specific proxies, we might even have to include the jar name in the jndi name to avoid this exception.
