2 Replies Latest reply on Jul 30, 2009 9:33 AM by Petter Stray

    Porting application from WebSphere to JBoss

    Petter Stray Newbie

      I am currently in the process of migrating an application from WebSphere Portal and Application Server to JBoss portal and application server.

      The application consists of 11 portlets all connected to a common backend running on the application server. I have, as a start, been able to modify and deploy one of the portlets, but am having problems accessing the backend. In WebSphere we were using the portlet contexts getService method to get the delegating methods, but this is not working on JBoss.

      Does anybody have any experience with migrating complete applications from WebSphere to JBoss portal?

      Any help to point me in the correct direction will be thankfully received.

      Best regards,

        • 1. Re: Porting application from WebSphere to JBoss
          Andy Pemberton Newbie

          I don't have experience specifically migrating websphere apps to jboss, but I do have extensive experience with both websphere and jboss portal.

          The first place to start with this kind of task is to ensure you're not using any vendor proprietary APIs (IBM in this case). You'll want to use the relevant portlet specification-defined APIs for your environment.

          I'm assuming your either migrating:
          - from websphere portal 6.0.X or earlier to jboss portal 2.6.X
          - from websphere portal 6.0.X to jboss portal 2.7.X

          Assuming you wouldn't be migrating off websphere 6.1 or 7, because they're both fairly new, so - you'll want to make sure you're migrating only JSR168-specific code to jboss.

          It may help if you:
          - describe your environment(s) in detail
          - PortletContext (in neither JSR168 nor JSR286) have a getService method - can you explain more about what API you're using here?
          - explain what you mean by "get the delegating methods"

          Hope this is helpful.

          • 2. Re: Porting application from WebSphere to JBoss
            Petter Stray Newbie

            We are migrating from WebSphere 5.1 to JBoss Portal 2.6.8.

            Here is our previous and new code:

             String JNDINAME = "SMOnlineFacade";
             String URL = "jnp://localhost:1099";
             String FACTORY = "org.jnp.interfaces.NamingContextFactory";
             String PKG_PREFIXES = "org.jboss.naming:org.jnp.interface";
             Object o = null;
             SMOnlineFacadeHome home = null;
             SMOnlineFacadeRemote smOnlineFacade = null;
             try {
             Hashtable env = new Hashtable();
             env.put(Context.INITIAL_CONTEXT_FACTORY, FACTORY);
             env.put(Context.PROVIDER_URL, URL);
             env.put(Context.URL_PKG_PREFIXES, PKG_PREFIXES);
             Context initialContext = new InitialContext(env);
             o = initialContext.lookup(JNDINAME); // The object returned is of type $Proxy###
             home = (SMOnlineFacadeHome) PortableRemoteObject.narrow(o, SMOnlineFacadeHome.class);
             smOnlineFacade = home.create();
             // Was previously
             // org.apache.jetspeed.portlet.PortletContext portletContext = getPortletConfig().getContext();
             // SMOnlineDelegate delegate = null;
             // org.apache.jetspeed.portlet.PortletService portletService;
             // try {
             // portletService = portletContext.getService(SMOnlineDelegate.class);
             // delegate = (SMOnlineDelegate)portletService;
             // } catch (Exception e) {
             // e.printStackTrace();
             // }

            By the delegating methods I mean our "interface" towards the backend. All our EJBs are deployd and bound to the correct JNDI's.

            I get the ClassCastException you see below...

            15:27:30,890 ERROR [STDERR] Caused by: java.lang.ClassCastException
            15:27:30,890 ERROR [STDERR] at com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:229)
            15:27:30,890 ERROR [STDERR] at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:137)
            15:27:30,890 ERROR [STDERR] at com.te.unitor.portlets.VesselSearch.getRemoteFacade(VesselSearch.java:892)
            15:27:30,890 ERROR [STDERR] at com.te.unitor.portlets.VesselSearch.getOnlineDelegate(VesselSearch.java:970)
            15:27:30,890 ERROR [STDERR] at com.te.unitor.portlets.VesselSearch.init(VesselSearch.java:132)
            15:27:30,890 ERROR [STDERR] at org.jboss.portal.portlet.impl.jsr168.PortletContainerImpl.initPortlet(PortletContainerImpl.java:359)
            15:27:30,906 ERROR [STDERR] at org.jboss.portal.portlet.impl.jsr168.PortletContainerImpl.start(PortletContainerImpl.java:233)
            15:27:30,906 ERROR [STDERR] ... 73 more
            15:27:30,906 ERROR [STDERR] Caused by: java.lang.ClassCastException: $Proxy314
            15:27:30,906 ERROR [STDERR] at com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:212)
            15:27:30,906 ERROR [STDERR] ... 79 more