6:50 a.m.
Hi!
I'm currently exploring EJB 3.0 using the Book "Mastering EJB 3.0 4th
Edition".
I have written a small test-session-bean.
It consists of the following:
MyMath.java
| package at.tac.ejb3.test.mymath;
|
| /**
| * @author michael
| * @version 0.1.0.0 27.09.2006
| */
| public interface MyMath {
| public Integer sum(Integer a, Integer b);
| }
|
MyMathBean.java
| /**
| *
| * @author michael
| * @version 0.1.0.0 27.09.2006
| */
| package at.tac.ejb3.test.mymath;
|
| import javax.ejb.Stateless;
| import javax.ejb.Remote;
| import javax.ejb.Local;
|
| @Stateless
| @Remote(MyMath.class)
| @Local(MyMath.class)
| public class MyMathBean implements MyMath{
| public Integer sum(Integer a, Integer b) {
| return a + b;
| }
| }
|
It has no ejb-jar.xml and the jboss.xml, persistence.xml and jbosscmp-jdbc.xml don't
contain any valuable data.
My first Question now: What is the name of my "Bean" now? "MyMath" or
"MyMathBean"?
In the book I read anonymous wrote : The EJB 3.0 specification mandates that containers
bind beans to the JNDI tree by their fully qualified names at deployment time. This
ensures that we can look up the beans in a very simple way.
But when I invoke list() on the JNDIView Bean using jmx-console I get:
| java: Namespace
| +- XAConnectionFactory (class: org.jboss.mq.SpyXAConnectionFactory)
| +- DefaultDS (class: org.jboss.resource.adapter.jdbc.WrapperDataSource)
| +- SecurityProxyFactory (class: org.jboss.security.SubjectSecurityProxyFactory)
| +- DefaultJMSProvider (class: org.jboss.jms.jndi.JNDIProviderAdapter)
| +- comp (class: javax.naming.Context)
| +- JmsXA (class: org.jboss.resource.adapter.jms.JmsConnectionFactoryImpl)
| +- ConnectionFactory (class: org.jboss.mq.SpyConnectionFactory)
| +- jaas (class: javax.naming.Context)
| | +- other (class: org.jboss.security.plugins.SecurityDomainContext)
| | +- HsqlDbRealm (class: org.jboss.security.plugins.SecurityDomainContext)
| | +- jbossmq (class: org.jboss.security.plugins.SecurityDomainContext)
| | +- JmsXARealm (class: org.jboss.security.plugins.SecurityDomainContext)
| +- timedCacheFactory (class: javax.naming.Context)
| Failed to lookup: timedCacheFactory, errmsg=org.jboss.util.TimedCachePolicy
| +- TransactionPropagationContextExporter (class:
org.jboss.tm.TransactionPropagationContextFactory)
| +- StdJMSPool (class: org.jboss.jms.asf.StdServerSessionPoolFactory)
| +- Mail (class: javax.mail.Session)
| +- comp.ejb3 (class: javax.naming.Context)
| | NonContext: null
| +- TransactionPropagationContextImporter (class:
org.jboss.tm.TransactionPropagationContextImporter)
| +- TransactionManager (class: org.jboss.tm.TxManager)
|
| Global JNDI Namespace
| +- XAConnectionFactory (class: org.jboss.mq.SpyXAConnectionFactory)
| +- TopicConnectionFactory (class: org.jboss.naming.LinkRefPair)
| +- EventDispatcher (class: org.jboss.ws.eventing.mgmt.DispatcherDelegate)
| +- UserTransactionSessionFactory (proxy: $Proxy42 implements interface
org.jboss.tm.usertx.interfaces.UserTransactionSessionFactory)
| +- UIL2ConnectionFactory[link -> ConnectionFactory] (class:
javax.naming.LinkRef)
| +- UIL2XAConnectionFactory[link -> XAConnectionFactory] (class:
javax.naming.LinkRef)
| +- QueueConnectionFactory (class: org.jboss.naming.LinkRefPair)
| +- topic (class: org.jnp.interfaces.NamingContext)
| | +- testDurableTopic (class: org.jboss.mq.SpyTopic)
| | +- testTopic (class: org.jboss.mq.SpyTopic)
| | +- securedTopic (class: org.jboss.mq.SpyTopic)
| +- queue (class: org.jnp.interfaces.NamingContext)
| | +- A (class: org.jboss.mq.SpyQueue)
| | +- testQueue (class: org.jboss.mq.SpyQueue)
| | +- ex (class: org.jboss.mq.SpyQueue)
| | +- DLQ (class: org.jboss.mq.SpyQueue)
| | +- D (class: org.jboss.mq.SpyQueue)
| | +- C (class: org.jboss.mq.SpyQueue)
| | +- B (class: org.jboss.mq.SpyQueue)
| +- MyMathBean (class: org.jnp.interfaces.NamingContext)
| | +- local (proxy: $Proxy73 implements interface
at.tac.ejb3.test.mymath.MyMath,interface org.jboss.ejb3.JBossProxy,interface
javax.ejb.EJBLocalObject)
| | +- remote (proxy: $Proxy72 implements interface
at.tac.ejb3.test.mymath.MyMath,interface org.jboss.ejb3.JBossProxy,interface
javax.ejb.EJBObject)
| +- ConnectionFactory (class: org.jboss.mq.SpyConnectionFactory)
| +- UserTransaction (class: org.jboss.tm.usertx.client.ClientUserTransaction)
| +- jmx (class: org.jnp.interfaces.NamingContext)
| | +- invoker (class: org.jnp.interfaces.NamingContext)
| | | +- RMIAdaptor (proxy: $Proxy36 implements interface
org.jboss.jmx.adaptor.rmi.RMIAdaptor,interface org.jboss.jmx.adaptor.rmi.RMIAdaptorExt)
| | +- rmi (class: org.jnp.interfaces.NamingContext)
| | | +- RMIAdaptor[link -> jmx/invoker/RMIAdaptor] (class:
javax.naming.LinkRef)
| +- UILXAConnectionFactory[link -> XAConnectionFactory] (class:
javax.naming.LinkRef)
| +- UILConnectionFactory[link -> ConnectionFactory] (class: javax.naming.LinkRef)
|
and JBoss throws an error to the console:
| 13:46:33,895 ERROR [JNDIView] JNDIView.getHAJndiAttributes() failed
| java.lang.NullPointerException: name cannot be null
| at javax.management.ObjectName.construct(ObjectName.java:342)
| at javax.management.ObjectName.<init>(ObjectName.java:1304)
| at org.jboss.naming.JNDIView.getHAJndiAttributes(JNDIView.java:836)
| at org.jboss.naming.JNDIView.getHAUrl(JNDIView.java:811)
| at org.jboss.naming.JNDIView.list(JNDIView.java:193)
| 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.java: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.jmx.adaptor.control.Server.invokeOpByName(Server.java:258)
| at org.jboss.jmx.adaptor.control.Server.invokeOp(Server.java:223)
| at
org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.invokeOp(HtmlAdaptorServlet.java:262)
| at
org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.processRequest(HtmlAdaptorServlet.java:100)
| at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.doPost(HtmlAdaptorServlet.java:82)
| at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
| at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
| at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
| at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
| at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
| at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
| at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
| at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
| at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
| at
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
| at java.lang.Thread.run(Thread.java:595)
|
So what do I have to do to get
context.lookup(MyMath.class.getName()); or
context.lookup(MyMathBean.class.getName()); (I don't know which is right)
working as in the book?
thx in advance
nomike aka Michael Postmann
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