Persistence Manager in the JNDI
At my company we are relaunching our website and we will be using portlets (together with a CMS) to implement the dynamic parts. I am searching for a way to get a real flexible deployment. I mean by this that I want to seperate the three layers, db-layer (entities), business layer (ejbs) and the view layer (multiple portlets implemented with Seam).
It would look something like this:
Code:
dblayer.ear entities.jar businesslayer.ear businesslayer.jar portlet1.ear seamComponents.jar portlet1.war portlet2.ear seamComponents.jar portlet2.war
The portlets all use the same business layer and the same entity layer.
That is also wy want this to be as flexible as possible. I don't want to deploy all my portlets again if I change something in my businesslayer.
It is possible to put an EntityManager in the JNDI by setting some properties in the persistence.xml. I wanted to see if this really worked so I made a little test setup (without the seperate businesslayer):
Code:
TestEnt.ear TestEntEJB.jar < contains the entities and the persistence.xml Test.ear TestEJB.jar < contains the seam component HelloWorld (HelloWorldAction.class)
HelloWorldAction class:
Code:
@Stateful
@Name("HelloWorld")
@Scope(ScopeType.CONVERSATION)
public class HelloWorldAction implements HelloWorld {
@PersistenceContext(unitName="userDatabase", type=EXTENDED)
private EntityManager em;
@SuppressWarnings("unchecked")
public String someAction() {
List<User> users = em.createQuery("from User u order by u.username").getResultList();
return null;
}
@Remove @Destroy
public void destroy() {}
}
The first time I manually deployed the testEnt.ear first and then I deployed the test.ear. To my joy everything worked. The entityManager got injected into the HelloWorldAction class and I could retrieve the users using the query.
But then I stumpled upon some problems:
1. If I redeploy the testEnt.ear the following exception gets thrown:
Code:
[ServiceController] Problem starting service jboss.j2ee:ear=Test.ear,jar=TestEJB.jar,name=HelloWorld Action,service=EJB3 javax.naming.NamingException: Could not bind user transaction for ejb name HelloWorldAction into JND I under jndiName: /UserTransaction [Root exception is javax.naming.NameAlreadyBoundException] at org.jboss.ejb3.EJBContainer.resolveInjectors(EJBContainer.java:631) at org.jboss.ejb3.EJBContainer.initializePool(EJBContainer.java:576) at org.jboss.ejb3.EJBContainer.start(EJBContainer.java:507) at org.jboss.ejb3.SessionContainer.start(SessionContainer.java:82) at org.jboss.ejb3.stateful.StatefulContainer.start(StatefulContainer.java:73) 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.ejb3.ServiceDelegateWrapper.startService(ServiceDelegateWrapper.java:99) at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289) at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245) 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.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978) at $Proxy0.start(Unknown Source) at org.jboss.system.ServiceController.start(ServiceController.java:417) at org.jboss.system.ServiceController.start(ServiceController.java:435) at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy182.start(Unknown Source) at org.jboss.ejb3.JmxKernelAbstraction.install(JmxKernelAbstraction.java:82) at org.jboss.ejb3.Ejb3Deployment.startPersistenceUnits(Ejb3Deployment.java:626) at org.jboss.ejb3.Ejb3Deployment.start(Ejb3Deployment.java:475) at org.jboss.ejb3.Ejb3Module.startService(Ejb3Module.java:139) at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289) at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978) at $Proxy0.start(Unknown Source) at org.jboss.system.ServiceController.start(ServiceController.java:417) at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy90.start(Unknown Source) at org.jboss.ejb3.EJB3Deployer.start(EJB3Deployer.java:449) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.ja va:142) at org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:97) at org.jboss.system.InterceptorServiceMBeanSupport.invokeNext(InterceptorServiceMBeanSupport.java:2 38) at org.jboss.ws.server.WebServiceDeployer.start(WebServiceDeployer.java:117) at org.jboss.deployment.SubDeployerInterceptorSupport$XMBeanInterceptor.start(SubDeployerIntercepto rSupport.java:188) at org.jboss.deployment.SubDeployerInterceptor.invoke(SubDeployerInterceptor.java:95) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy91.start(Unknown Source) at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1007) at org.jboss.deployment.MainDeployer.start(MainDeployer.java:997) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:808) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:771) at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.ja va:142) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy6.deploy(Unknown Source) at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:421) at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:610) at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentSc anner.java:263) at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScan ner.java:274) at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScann er.java:225) Caused by: javax.naming.NameAlreadyBoundException at org.jnp.server.NamingServer.bind(NamingServer.java:144) at org.jnp.interfaces.NamingContext.bind(NamingContext.java:566) at org.jnp.interfaces.NamingContext.bind(NamingContext.java:531) at org.jboss.util.naming.Util.bind(Util.java:102) at org.jboss.util.naming.Util.bind(Util.java:89) at org.jboss.ejb3.EJBContainer.resolveInjectors(EJBContainer.java:628) ... 104 more
The second problem that I have is when I restart the server. The
test.ejb gets initialized before the testEnt.ear and then the EntityManager isn't in the JNDI yet. This results in trouble offcourse:
Code:
14:24:56,919 ERROR [URLDeploymentScanner] Incomplete Deployment listing: --- MBeans waiting for other MBeans --- ObjectName: jboss.j2ee:ear=Test.ear,jar=TestEJB.jar,name=HelloWorldAction,service=EJB3 State: NOTYETINSTALLED I Depend On: persistence.units:unitName=userDatabase --- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM --- ObjectName: persistence.units:unitName=userDatabase State: NOTYETINSTALLED Depends On Me: jboss.j2ee:ear=Test.ear,jar=TestEJB.jar,name=HelloWorldAction,service=EJB3
Does someone know a way to solve both problems?
