6 Replies Latest reply on Oct 2, 2008 7:16 PM by aslocal

Schedular MBean & Injection

aslocal Sep 30, 2008 8:10 PM

Hello. When my Scheduler mBean starts up it can't find my injected EJB's (it works fine from the jmx-console, when I click the method button) Any ideas?

Code snippet:

<!-- ==================================================================== --> <!-- Scheduler Service -->
 <!-- ==================================================================== -->
 <!--
 | This example shows how to use a target MBean
 -->
 <mbean code="org.jboss.mx.timer.JBossTimer"
 name="jboss:service=Timer">
 </mbean>

 <mbean code="com.craneae.t1.schedular.ejb.jmx.TeamCenterADSchedulerBean"
 name=":name=TeamCenterADSchedulerBean">
 </mbean>
 <mbean code="org.jboss.varia.scheduler.Scheduler"
 name=":service=Scheduler,name=TeamCenterADSchedulerBean">
 <attribute name="StartAtStartup">true</attribute>
 <attribute name="SchedulableMBean">:name=TeamCenterADSchedulerBean</attribute>
 <attribute name="SchedulableMBeanMethod">expireAccounts()</attribute>
 <attribute name="InitialStartDate">NOW</attribute>
 <attribute name="SchedulePeriod">10000</attribute>
 <attribute name="InitialRepetitions">1</attribute>
 <attribute name="FixedRate">true</attribute>
 </mbean>


 // Inject the UserDAO bean
 @EJB (beanName="UserDAOBean") private UserDAOBeanLocal userDAOBean;

 // Update email addresses once per night
 @SuppressWarnings("unchecked")
 public void expireAccounts()
 {
 List<User> resultList = userDAOBean.getActiveUsers();

The userDAOBean is always null on startup.

Thanks!

1. Re: Schedular MBean & Injection

peterj Oct 1, 2008 11:16 AM (in response to aslocal)
Services are started before EJBs, therefore the EJB is probably not ready at the time the code is run. You need to add a depends tag that references the BMean generated for the EJB. Something like this:

<mbean ...> <depends>jboss.j2ee:ear=xxx.ear,jar=xxx.jar,name=MyEjb,service=EJB3</depends> </mbean>

You can use the jmx console to look up the name for your ejb's mbean.
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2. Re: Schedular MBean & Injection

aslocal Oct 1, 2008 12:17 PM (in response to aslocal)
"PeterJ" wrote:
Services are started before EJBs, therefore the EJB is probably not ready at the time the code is run. You need to add a depends tag that references the BMean generated for the EJB. Something like this:

<mbean ...> <depends>jboss.j2ee:ear=xxx.ear,jar=xxx.jar,name=MyEjb,service=EJB3</depends> </mbean>

You can use the jmx console to look up the name for your ejb's mbean.

Hi Peter. Thanks for the response. The strange thing is the application server can be completely started and it still fails (for example setting the SchedulePeriod to 10000 will launch the method after it's completely started) It still works from the console however. It's almost as it's being launched from outside of the servers context or something?
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3. Re: Schedular MBean & Injection

peterj Oct 1, 2008 12:26 PM (in response to aslocal)

If the EJB is already deployed when the service runs, then it sounds like this could be a bug. You should probably file a JIRA.
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4. Re: Schedular MBean & Injection

aslocal Oct 1, 2008 12:37 PM (in response to aslocal)

"PeterJ" wrote:
If the EJB is already deployed when the service runs, then it sounds like this could be a bug. You should probably file a JIRA.

Thanks. I did open up a support case with Redhat. Funny enough under 4.2.3 I get this error when starting:

09:35:03,980 ERROR [STDERR] java.lang.NullPointerException
09:35:03,980 ERROR [STDERR] at org.jboss.ejb3.JndiUtil.lookup(JndiUtil.java:49)
09:35:03,980 ERROR [STDERR] at org.jboss.injection.JndiPropertyInjector.lookup(JndiPropertyInjector.java:87)
09:35:03,980 ERROR [STDERR] at org.jboss.injection.JndiPropertyInjector.inject(JndiPropertyInjector.java:112)
09:35:03,980 ERROR [STDERR] at org.jboss.injection.JndiPropertyInjector.inject(JndiPropertyInjector.java:107)
09:35:03,980 ERROR [STDERR] at org.jboss.injection.JndiPropertyInjector.inject(JndiPropertyInjector.java:65)
09:35:03,980 ERROR [STDERR] at org.jboss.ejb3.service.ServiceContainer.injectDependencies(ServiceContainer.java:446)
09:35:03,980 ERROR [STDERR] at org.jboss.ejb3.service.ServiceContainer.start(ServiceContainer.java:172)
09:35:03,980 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
09:35:03,980 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
09:35:03,980 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
09:35:03,980 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:585)
09:35:03,980 ERROR [STDERR] at org.jboss.ejb3.ServiceDelegateWrapper.startService(ServiceDelegateWrapper.java:103)
09:35:03,980 ERROR [STDERR] at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
09:35:03,980 ERROR [STDERR] at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
09:35:03,980 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
09:35:03,980 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
09:35:03,980 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
09:35:03,980 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:585)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
09:35:03,980 ERROR [STDERR] at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
09:35:03,980 ERROR [STDERR] at $Proxy0.start(Unknown Source)
09:35:03,980 ERROR [STDERR] at org.jboss.system.ServiceController.start(ServiceController.java:417)
09:35:03,980 ERROR [STDERR] at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
09:35:03,980 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
09:35:03,980 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:585)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
09:35:03,980 ERROR [STDERR] at $Proxy99.start(Unknown Source)
09:35:03,980 ERROR [STDERR] at org.jboss.ejb3.JmxKernelAbstraction.install(JmxKernelAbstraction.java:120)
09:35:03,980 ERROR [STDERR] at org.jboss.ejb3.Ejb3Deployment.registerEJBContainer(Ejb3Deployment.java:301)
09:35:03,980 ERROR [STDERR] at org.jboss.ejb3.Ejb3Deployment.start(Ejb3Deployment.java:362)
09:35:03,980 ERROR [STDERR] at org.jboss.ejb3.Ejb3Module.startService(Ejb3Module.java:91)
09:35:03,980 ERROR [STDERR] at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
09:35:03,980 ERROR [STDERR] at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
09:35:03,980 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
09:35:03,980 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
09:35:03,980 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
09:35:03,980 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:585)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
09:35:03,980 ERROR [STDERR] at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
09:35:03,980 ERROR [STDERR] at $Proxy0.start(Unknown Source)
09:35:03,980 ERROR [STDERR] at org.jboss.system.ServiceController.start(ServiceController.java:417)
09:35:03,980 ERROR [STDERR] at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
09:35:03,980 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
09:35:03,980 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:585)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
09:35:03,980 ERROR [STDERR] at $Proxy33.start(Unknown Source)
09:35:03,980 ERROR [STDERR] at org.jboss.ejb3.EJB3Deployer.start(EJB3Deployer.java:512)
09:35:03,980 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
09:35:03,980 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
09:35:03,980 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
09:35:03,980 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:585)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:97)
09:35:03,980 ERROR [STDERR] at org.jboss.system.InterceptorServiceMBeanSupport.invokeNext(InterceptorServiceMBeanSupport.java:238)
09:35:03,980 ERROR [STDERR] at org.jboss.wsf.container.jboss42.DeployerInterceptor.start(DeployerInterceptor.java:87)
09:35:03,980 ERROR [STDERR] at org.jboss.deployment.SubDeployerInterceptorSupport$XMBeanInterceptor.start(SubDeployerInterceptorSupport.java:188)
09:35:03,980 ERROR [STDERR] at org.jboss.deployment.SubDeployerInterceptor.invoke(SubDeployerInterceptor.java:95)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
09:35:03,980 ERROR [STDERR] at $Proxy34.start(Unknown Source)
09:35:03,980 ERROR [STDERR] at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025)
09:35:03,980 ERROR [STDERR] at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1015)
09:35:03,980 ERROR [STDERR] at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819)
09:35:03,980 ERROR [STDERR] at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
09:35:03,980 ERROR [STDERR] at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
09:35:03,980 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
09:35:03,980 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:585)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
09:35:03,980 ERROR [STDERR] at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
09:35:03,980 ERROR [STDERR] at $Proxy9.deploy(Unknown Source)
09:35:03,980 ERROR [STDERR] at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:421)
09:35:03,980 ERROR [STDERR] at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:610)
09:35:03,980 ERROR [STDERR] at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:263)
09:35:03,980 ERROR [STDERR] at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScanner.java:274)
09:35:03,980 ERROR [STDERR] at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:225)

Is there a way to wait for JNDI or something?

Thanks.

5. Re: Schedular MBean & Injection

peterj Oct 1, 2008 12:44 PM (in response to aslocal)

To wait on JNDI add a depends on jboss:service=Naming
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6. Re: Schedular MBean & Injection

aslocal Oct 2, 2008 7:16 PM (in response to aslocal)

Ok, I found out the problem. I was declaring my mBean as an EJB 3.0 bean, but still implementing a 2.0 class. Therefore, it couldn't get an EJB 3.0 context. I guess I went a little cut and paste happy with Internet examples. Here's what works in case anyone else has this issue:

schedular-service.xml

 <mbean code="org.jboss.varia.scheduler.Scheduler"
 name=":service=Scheduler,scheduable=TeamCenterADSchedulerMBean">
 <attribute name="StartAtStartup">true</attribute>
 <attribute name="SchedulableMBean">name:service=TeamCenterADSchedulerMBean</attribute>
 <attribute name="SchedulableMBeanMethod">expireAccounts()</attribute>
 <attribute name="InitialStartDate">NOW</attribute>
 <attribute name="SchedulePeriod">20000</attribute>
 <attribute name="InitialRepetitions">1</attribute>
 <attribute name="FixedRate">true</attribute>
 <depends>jboss.j2ee:ear=schedular.ear,jar=schedular.jar,name=TeamCenterADSchedulerBean,service=EJB3</depends>
 </mbean>

code:


@Service (objectName="name:service=TeamCenterADSchedulerMBean")
@Management(TeamCenterADScheduler.class)
public class TeamCenterADSchedulerMBean implements TeamCenterADScheduler
{
...
}
public interface TeamCenterADScheduler
{

 public void updateEmail() ;
 public void expireAccounts();
}

It's that easy =) Thanks Peter & Chris from JBoss support on this one.

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