I created and called a stateful session bean successfully:
try
{
Context ctx = getInitialContext();
CMMaintSessionHome home = (CMMaintSessionHome)
ctx.lookup("cmMaintSession.CMMaintSessionHome");
CMMaintSession cmMaintSession = (CMMaintSession) home.create();
User user = new User();
user.setUserName(m_userId);
user.setPassword(m_password);
System.out.println("<<< CMMaintLoginDB.setUserInfo() - calling setUser on
session bean...");
cmMaintSession.setUser(user);
// initialize session bean
System.out.println("<<< CMMaintLoginDB.setUserInfo() - calling initialize
on session bean...");
cmMaintSession.initialize();
System.out.println("<<< CMMaintLoginDB.setUserInfo() - storing handle to
session bean in session tracking...");
m_session.setAttribute("CMMaintSessionHandle", cmMaintSession.getHandle());
m_session.setAttribute("userAuthenticated", "true");
}
catch (Exception e)
{
throw new JApplicationException(JApplicationException.NOPROCESS,
e.getMessage());
}
After authentication to the DB, I then forward the request on to another jsp and
eventually call the stateful session bean this way:
try {
System.out.println("<<< CMCommodityDB constructor - getting handle to
session bean from session tracking...");
Handle cmMaintSessionHandle = (Handle)
session.getAttribute("CMMaintSessionHandle");
System.out.println("<<< CMCommodityDB constructor - session handle:
"+cmMaintSessionHandle.getClass().getName());
if (cmMaintSessionHandle == null)
System.out.println("<<< CMCommodityDB constructor: CMMaintSession not
found in session tracking...");
System.out.println("<<< CMCommodityDB constructor - about to get session
bean from the handel...");
Object o = cmMaintSessionHandle.getEJBObject();
System.out.println("<<< CMCommodityDB constructor - getting the session
bean from the handle: "+o.getClass().getName());
m_cmMaintSession = (CMMaintSession) cmMaintSessionHandle.getEJBObject();
} catch (RemoteException e) {
System.out.println("<<< CMCommodityDB constructor - RemoteException:
"+e.getMessage());
throw new JApplicationException(JApplicationException.NOPROCESS,
e.getMessage());
} catch (EJBException e) {
System.out.println("<<< CMCommodityDB constructor - EJBException:
"+e.getMessage());
throw new JApplicationException(JApplicationException.NOPROCESS,
e.getMessage());
} catch (NullPointerException e) {
System.out.println("<<< CMCommodityDB constructor - NullPointerException:
"+e.getMessage());
throw new JApplicationException(JApplicationException.NOPROCESS,
e.getMessage());
}
The code throws a NullPointException in
org.jboss.ejb.plugins.AbstractTxInterceptorBMT.invokeNext(AbstractTxInterceptorBMT.java:128)
from the following line in my code:
Object o = cmMaintSessionHandle.getEJBObject();
Here is a portion of the server.log file:
2004-08-06 13:34:44,987 INFO [STDOUT] <<< Authenticate.authenticate() - getting
connection...
2004-08-06 13:34:46,622 INFO [STDOUT] ORACLE CONNECTION made by: jurban to
jdbc:oracle:thin:@raindev-emt:1527:ecvmd
2004-08-06 13:34:46,623 INFO [STDOUT] <<< Authenticate.authenticate() - got
connection...
2004-08-06 13:34:47,031 INFO [STDOUT] <<< CMMaintSessionBean.setSessionContext()
2004-08-06 13:34:47,046 DEBUG [org.jboss.ejb.StatefulSessionContainer] Created new
session ID: dxkntmdi-4
2004-08-06 13:34:47,054 DEBUG [org.jboss.ejb.StatefulSessionContainer] Using create
method for session: public void cmMaintSession.CMMa
intSessionBean.ejbCreate() throws java.rmi.RemoteException,javax.ejb.CreateException
2004-08-06 13:34:47,055 INFO [STDOUT] <<< CMMaintSessionBean.ejbCreate()
2004-08-06 13:34:47,060 DEBUG [org.jboss.proxy.ejb.ProxyFactory] seting invoker proxy
binding for stateful session: stateful-rmi-invoke
r
2004-08-06 13:34:47,246 INFO [STDOUT] <<< CMMaintLoginDB.setUserInfo() - calling
setUser on session bean...
2004-08-06 13:34:47,259 INFO [STDOUT] <<< CMMaintLoginDB.setUserInfo() - calling
initialize on session bean...
2004-08-06 13:34:47,261 INFO [STDOUT] <<< CMMaintSessionBean.initialize()
2004-08-06 13:34:47,261 INFO [STDOUT] CMMaintSessionBean.getUniqueDBConnection() -
getting unique db connection...
2004-08-06 13:34:47,566 INFO [STDOUT] ORACLE CONNECTION made by: jurban to
jdbc:oracle:thin:@db:1111:sid
2004-08-06 13:34:47,569 INFO [STDOUT]
2004-08-06 13:34:49,645 INFO [STDOUT] <<< CMMaintLoginDB.setUserInfo() - storing
handle to session bean in session tracking...
2004-08-06 13:34:49,660 INFO [STDOUT] <<< Mediator.doPost() - directorName:
/CMMaintDirector
2004-08-06 13:34:49,662 INFO [STDOUT] ********** REQUEST **********
2004-08-06 13:34:49,662 INFO [STDOUT] ********** SystemRequest: CMCommodityScreen
2004-08-06 13:34:49,663 INFO [STDOUT] ********** event: top
2004-08-06 13:34:49,663 INFO [STDOUT] ********** System: CMMaint
2004-08-06 13:34:49,664 INFO [STDOUT] <<< CMMaintDirector.callJSP() - forwarding to
url: /cmMaint/CMCommodityScreen.jsp
2004-08-06 13:34:49,722 INFO [STDOUT] <<< CMCommodityScreen.jsp - 1
2004-08-06 13:34:49,731 INFO [STDOUT] <<< CMCommodityDB constructor - getting handle
to session bean from session tracking...
2004-08-06 13:34:49,732 INFO [STDOUT] <<< CMCommodityDB constructor - getting the
session bean from the handle...
2004-08-06 13:34:49,749 ERROR [org.jboss.ejb.plugins.LogInterceptor] RuntimeException:
java.lang.NullPointerException
at
org.jboss.ejb.plugins.AbstractTxInterceptorBMT.invokeNext(AbstractTxInterceptorBMT.java:128)
at org.jboss.ejb.plugins.TxInterceptorBMT.invokeHome(TxInterceptorBMT.java:56)
at
org.jboss.ejb.plugins.StatefulSessionInstanceInterceptor.invokeHome(StatefulSessionInstanceInterceptor.java:102)
at org.jboss.ejb.plugins.LogInterceptor.invokeHome(LogInterceptor.java:120)
at
org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invokeHome(ProxyFactoryFinderInterceptor.java:93)
at
org.jboss.ejb.StatefulSessionContainer.internalInvokeHome(StatefulSessionContainer.java:404)
at org.jboss.ejb.Container.invoke(Container.java:743)
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:324)
at
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:360)
at
org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvokerProxy.java:135)
at
org.jboss.proxy.ejb.handle.StatefulHandleImpl.getEJBObject(StatefulHandleImpl.java:154)
at cmHelper.CMCommodityDB.(CMCommodityDB.java:38)
at cmHelper.CMCommodityWB.processRequest(CMCommodityWB.java:55)
at
org.apache.jsp.cmMaint.CMCommodityScreen_jsp._jspService(CMCommodityScreen_jsp.java:74)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:703)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312)
at cmServlets.CMMaintDirector.callJSP(CMMaintDirector.java:292)
at cmServlets.CMMaintDirector.service(CMMaintDirector.java:171)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:703)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312)
at cmServlets.Mediator.doPost(Mediator.java:91)
at cmServlets.Mediator.doGet(Mediator.java:56)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:72)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at
org.jboss.web.tomcat.security.JBossSecurityMgrRealm.invoke(JBossSecurityMgrRealm.java:275)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:536)
2004-08-06 13:34:49,771 INFO [STDOUT] <<< CMCommodityDB constructor -
RemoteException: Could not get EJBObject; nested exception is:
java.rmi.ServerException: RuntimeException; nested exception is:
java.lang.NullPointerException
2004-08-06 13:34:49,774 INFO [STDOUT] <<< CMCommodityScreen.jsp - 2
2004-08-06 13:34:49,775 INFO [STDOUT] <<< CMCommodityScreen.jsp - 3
2004-08-06 13:34:49,776 INFO [STDOUT] <<< CMCommodityScreen.jsp Error Status from
WorkerBean: Could not get EJBObject; nested exceptio
n is:
java.rmi.ServerException: RuntimeException; nested exception is:
java.lang.NullPointerException
2004-08-06 13:34:49,777 INFO [STDOUT] <<< CMCommodityScreen.jsp - error: Could not
get EJBObject; nested exception is:
java.rmi.ServerException: RuntimeException; nested exception is:
java.lang.NullPointerException
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