3:06 a.m.
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?
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