Unable to invoke EJB from a BPEL process.

Question

Hello all
I am running BPEL process manager over weblogic 8.1 App server. I am trying to invoke a simple stateless session bean from a synchronous BPEL process. I have created a WSDL for this EJB with appropriate binding and service elements.
I am able to build my BPEL sync process and deploy it. But, when I run the process and invoke the EJB, I am getting the following exception-
BPEL Fault: {http://schemas.oracle.com/bpel/extension}bindingFaultCould not create instance for home 'ClusterableRemoteRef(-3059145150938040994S:172.26.210.17:[9700,9700,-1,-1,9700,-1,-1,0,0]:myorabpel:orabpelServer [-3059145150938040994S:172.26.210.17:[9700,9700,-1,-1,9700,-1,-1,0,0]:myorabpel:orabpelServer/288])/288'; nested exception is:
java.lang.NoSuchMethodException: com.carlson.sample.HelloWorldSessionBean_n4vx3i_HomeImpl_812_WLStub.create()
I have a home interface for the EJB which has a 'create' method and my session bean has a ejbCreate method. I am using weblogic.appc to create the stubs and skeletons for the EJB.
Has anyone tried this ?? The tutorial in the download 702.bindings/EJBBinding does something similar to this. But, I am having problems with that too.
Any comments, advice, sample code will be helpful.
Thanks a bunch
- Mahesh :)

Answer 1

I have deployed my Bean Managed Persistance Entity Bean in Weblogic 8.1 App Server. Trying to access the ejb from Synchronous BPEL process. I tried in two ways
1. By accessing the ejb directly from BPEL process, writing the following code in BPEL process
<bpelx:exec xmlns:bpelx="http://schemas.oracle.com/bpel/extension" language="java" version="1.4" name="InventoryEJB">
               <![CDATA[
     // Java code snippet
     try{   
     Hashtable properties = new Hashtable();
          properties.put(InitialContext.INITIAL_CONTEXT_FACTORY,
"weblogic.jndi.WLInitialContextFactory");
          properties.put(InitialContext.PROVIDER_URL, "t3://PCIIB07447:7001");
          InitialContext context = new InitialContext(properties);
          InventoryHome home = (InventoryHome) context.lookup("Inventory");
          InventoryRemote remote = home.create();
          int status = remote.getInventory("Chevrolet","2-Door Coupes","Chevy Cobalt",5);
          addAuditTrailEntry("Status is: " + status);
setVariableData("output", "payload",
"/status", new Integer(status));
catch(Exception e){}
     ]]>
          </bpelx:exec>
Also copied the interface files in system\classes directory. I got the expected output but i am not able to view the "Visual Flow". Getting the following error in my BPEL server console
<Sep 9, 2004 12:46:51 PM IST> <Warning> <RMI> <BEA-080003> <RuntimeException thr
own by rmi server: weblogic.management.internal.RemoteMBeanServerImpl.invoke(Lja
vax.management.ObjectName;Ljava.lang.String;[Ljava.lang.Object;[Ljava.lang.Strin
g;)
weblogic.management.NoAccessRuntimeException: Access not allowed for subject: p
rincipals=[], on ResourceType: ServerConfig Action: execute, Target: lookupServe
rRuntime.
weblogic.management.NoAccessRuntimeException: Access not allowed for subject: pr
incipals=[], on ResourceType: ServerConfig Action: execute, Target: lookupServer
Runtime
at weblogic.management.internal.SecurityHelper$IsAccessAllowedPrivilegeA
ction.wlsRun(SecurityHelper.java:564)
at weblogic.management.internal.SecurityHelper$IsAccessAllowedPrivilegeA
ction.run(SecurityHelper.java:456)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(Authenticate
dSubject.java:317)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:
118)
at weblogic.management.internal.SecurityHelper.isAccessAllowed(SecurityH
elper.java:350)
at weblogic.management.internal.RemoteMBeanServerImpl.private_invoke(Rem
oteMBeanServerImpl.java:946)
at weblogic.management.internal.RemoteMBeanServerImpl.invoke(RemoteMBean
ServerImpl.java:908)
at weblogic.management.internal.RemoteMBeanServerImpl_WLSkel.invoke(Unkn
own Source)
at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:477)
at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:420)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(Authenticate
dSubject.java:353)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:
144)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.jav
a:415)
at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest
.java:30)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
2. The other way i used WSIF frame work, but i could not resolved.
Thanks for your help in advance.