[jboss-user] [Spring Integration] - ClassLoader inside deloyed bean cannot find existing class

ivanyuan do-not-reply at jboss.com
Mon Nov 23 15:54:26 EST 2009 

Hi Guru,

With the help from spring integration community, I can successfully deploy spring beans using deployer release 2.5 (jdk5) in JBoss 4.2.2GA and I can also access the deployed beans from another web application.

However I am running into a problem of using ClassLoader inside the deployed spring beans.

>From my web application, I can get bean reference called "billingBean". However when I invoke one method of this bean, which will dynamically create some instances using classloader, I got "java.lang.ClassNotFoundException", and the stacktrace is as below:


  | 2009-Nov-23 14:53:17]   ERROR - java.lang.ClassNotFoundException: com.iseemedia.provisioningbilling.actionflow.action.AddSubscriptionAction
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at java.security.AccessController.doPrivileged(Native Method)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at com.iseemedia.provisioningbilling.actionflow.ActionFlow.buildFlow(ActionFlow.java:49)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at com.iseemedia.provisioningbilling.actionflow.ActionFlow.<init>(ActionFlow.java:26)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at com.iseemedia.provisioningbilling.actionflow.ActionFlowFactory.getActionFlow(ActionFlowFactory.java:49)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at com.iseemedia.provisioningbilling.session.SessionManagement.createSession(SessionManagement.java:173)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at com.iseemedia.provisioningbilling.impl.ProvisioningBillingImpl.asyncSubscribe(ProvisioningBillingImpl.java:219)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at com.iseemedia.provisioningbilling.intf.ServiceBillingAdapter.subscribe(ServiceBillingAdapter.java:171)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at com.iseemedia.subscription.common.WebServiceBillingAdapter.subscribeRequest(WebServiceBillingAdapter.java:47)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at com.iseemedia.subscription.webservice.SubscriptionWS.manageSubscription(SubscriptionWS.java:108)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at java.lang.reflect.Method.invoke(Method.java:585)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:166)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:82)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:122)
  | 
  | [2009-Nov-23 14:53:17]   ERROR - 	at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:70)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:58)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at java.util.concurrent.FutureTask.run(FutureTask.java:123)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.cxf.workqueue.SynchronousExecutor.execute(SynchronousExecutor.java:37)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:98)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:236)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:104)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.cxf.transport.servlet.ServletDestination.invoke(ServletDestination.java:99)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:352)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:144)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.cxf.transport.servlet.AbstractCXFServlet.invoke(AbstractCXFServlet.java:163)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.cxf.transport.servlet.AbstractCXFServlet.doGet(AbstractCXFServlet.java:145)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
  | 
  | [2009-Nov-23 14:53:18]   ERROR - 	at java.lang.Thread.run(Thread.java:595)
  | 
  | 

The not-found-class, com.iseemedia.provisioningbilling.actionflow.action.AddSubscriptionAction actually is inside the spring archive file. I also tried to copy the spring archive file to default/lib (of course, I renamed it as *.jar), I still got same exception.

Here is the snapshot of my code that will dynamically create some instances. This piece of code worked fine before using the spring deployer.


  | 		HashMap<String, Action> aMap = new HashMap<String, Action>();
  | 		for (String key : flowDef.getActionMap().keySet())
  | 		{
  | 			ActionDef aDef = flowDef.getActionMap().get(key);
  | 
  | 			Action a =  (Action)ClassLoader.getSystemClassLoader().loadClass(aDef.getType()).newInstance();
  | 			aMap.put(key, a);
  | 		}
  | 

The bold line is the actual cause of the exception. I just wonder which class loader I should use inside a deployed bean?

Thanks in advance,

Ivan Yuan

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