[jboss-user] [EJB 3.0] - Re: How to inject sessionbean from sessionbean from another

[j-n00b]

Jaikiran, I just tried the @Service notation:


  | package ae;
  | 
  | import javax.annotation.Resource;
  | import javax.ejb.TransactionAttribute;
  | import javax.ejb.TransactionAttributeType;
  | 
  | import org.apache.log4j.Logger;
  | import org.jboss.ejb3.annotation.Depends;
  | import org.jboss.ejb3.annotation.Management;
  | import org.jboss.ejb3.annotation.Service;
  | 
  | @Service
  | @Management(MasterMBean.class)
  | @Depends( { "jboss.j2ee:jar=SubEJB.jar,name=CalculatorBean,service=EJB3" })
  | public class Master implements MasterMBean {
  | 
  | 	private static final Logger log = Logger.getLogger(Master.class);
  | 
  | 	@EJB(mappedName = Calculator.JNDI_NAME)
  | 	private Calculator additionBean;
  | 
  | 	@TransactionAttribute(TransactionAttributeType.NEVER)
  | 	public void start() throws Exception {
  | 		log.info("### starting");
  | 
  | 		if (additionBean == null) {
  | 			log.error("### unable to inject CalculatorBean!!!");
  | 			return;
  | 		}
  | 
  | 		long result = additionBean.add(new int[] { 1, 2, 3 });
  | 		log.info(result);
  | 
  | 		// TODO use a quartz job to run a calculation every 5 seconds!
  | 	}
  | 
  | 	public void stop() {
  | 		log.info("### stopping");
  | 	}
  | }
  | 

After removing the master-mbean-jboss.xml and deploying the SAR into server/all/deploy-hasingleton, the Injection worked pretty fine! But the old approach still does not work. Can you tell me why? 

Another thing: as you can see, I had to annotate the start() method, because I got an Exception:
anonymous wrote : 
  | 14:54:06,031 INFO  [ConnectionFactory] org.jboss.jms.server.connectionfactory.ConnectionFactory at 1e287e5 started
  | 14:54:06,031 INFO  [ConnectionFactoryBindingService] Bound ConnectionManager 'jboss.jca:service=ConnectionFactoryBinding,name=JmsXA' to JNDI name 'java:JmsXA'
  | 14:54:06,093 INFO  [TomcatDeployment] deploy, ctxPath=/, vfsUrl=ROOT.war
  | 14:54:06,156 INFO  [TomcatDeployment] deploy, ctxPath=/jmx-console, vfsUrl=jmx-console.war
  | 14:54:06,265 INFO  [JBossASKernel] Created KernelDeployment for: SubEJB.jar
  | 14:54:06,265 INFO  [JBossASKernel] installing bean: jboss.j2ee:jar=SubEJB.jar,name=CalculatorBean,service=EJB3
  | 14:54:06,265 INFO  [JBossASKernel]   with dependencies:
  | 14:54:06,265 INFO  [JBossASKernel]   and demands:
  | 14:54:06,265 INFO  [JBossASKernel]      jboss.ejb:service=EJBTimerService
  | 14:54:06,265 INFO  [JBossASKernel]   and supplies:
  | 14:54:06,265 INFO  [JBossASKernel]      jndi:AECalculator
  | 14:54:06,265 INFO  [JBossASKernel]      jndi:CalculatorBean/remote-ae.Calculator
  | 14:54:06,265 INFO  [JBossASKernel]      Class:ae.Calculator
  | 14:54:06,265 INFO  [JBossASKernel] Added bean(jboss.j2ee:jar=SubEJB.jar,name=CalculatorBean,service=EJB3) to KernelDeployment of: SubEJB.jar
  | 14:54:06,375 INFO  [SessionSpecContainer] Starting jboss.j2ee:jar=SubEJB.jar,name=CalculatorBean,service=EJB3
  | 14:54:06,390 INFO  [EJBContainer] STARTED EJB: ae.CalculatorBean ejbName: CalculatorBean
  | 14:54:06,437 INFO  [JndiSessionRegistrarBase] Binding the following Entries in Global JNDI:
  | 
  |         AECalculator - EJB3.x Default Remote Business Interface
  |         CalculatorBean/remote-ae.Calculator - EJB3.x Remote Business Interface
  | 
  | 14:54:06,593 INFO  [EJBContainer] STARTED EJB: ae.Master ejbName: Master
  | 14:54:06,609 INFO  [JndiSessionRegistrarBase] Binding the following Entries in Global JNDI:
  | 
  | 
  | 14:54:06,625 INFO  [JBossASKernel] installing bean: jboss.j2ee:jar=master.sar,name=Master,service=EJB3,type=ManagementInterface
  | 14:54:06,625 INFO  [JBossASKernel]   with dependencies:
  | 14:54:06,625 INFO  [JBossASKernel]   and demands:
  | 14:54:06,625 INFO  [JBossASKernel]      jndi:AECalculator
  | 14:54:06,625 INFO  [JBossASKernel]      jboss.ejb:service=EJBTimerService
  | 14:54:06,625 INFO  [JBossASKernel]      jboss.j2ee:jar=SubEJB.jar,name=CalculatorBean,service=EJB3
  | 14:54:06,625 INFO  [JBossASKernel]   and supplies:
  | 14:54:06,625 INFO  [JBossASKernel]      jndi:Master/remote
  | 14:54:06,625 INFO  [JBossASKernel]      Class:ae.MasterMBean
  | 14:54:06,625 INFO  [JBossASKernel] Installing bean(jboss.j2ee:jar=master.sar,name=Master,service=EJB3,type=ManagementInterface) into kernel
  | 14:54:06,640 INFO  [Master] ### starting
  | 14:54:06,687 ERROR [ServiceContainer] Encountered an error in start of Master
  | java.lang.RuntimeException: Problem registering @Management interface for @Service class ae.Master
  |         at org.jboss.ejb3.service.ServiceContainer.registerManagementInterface(ServiceContainer.java:727)
  |         [...]
  |         at java.lang.Thread.run(Thread.java:595)
  | Caused by: java.lang.RuntimeException: javax.management.MBeanException
  |         at org.jboss.ejb3.deployers.JBossASKernel.installMBean(JBossASKernel.java:181)
  |         at org.jboss.ejb3.service.ServiceContainer.registerManagementInterface(ServiceContainer.java:699)
  |         ... 50 more
  | Caused by: javax.management.MBeanException
  |         at org.jboss.ejb3.service.ServiceMBeanDelegate.invoke(ServiceMBeanDelegate.java:219)
  |         at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164)
  |         at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668)
  |         at org.jboss.ejb3.deployers.JBossASKernel.invokeOptionalMethod(JBossASKernel.java:287)
  |         at org.jboss.ejb3.deployers.JBossASKernel.installMBean(JBossASKernel.java:177)
  |         ... 51 more
  | Caused by: javax.ejb.EJBException: java.lang.RuntimeException: cannot import a transaction context when a transaction is already associated with the thread
  |         at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:77)
  |         at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
  |         at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:190)
  |         at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
  |         at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
  |         at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
  |         at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
  | 
Why is that, actually? I don't have any problems when looking up the bean manually

Greetings,
Andre

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