I am having a problem trying to bind a remote object to the WebSphere 3.5 JNDI name service (com.ibm.ejs.ns.jndi.CNInitialContextFactory). When I use ctx.bind(name, object), I am getting a java.lang.ClassCastException.
Would be really grateful for any help as it is driving me mad!
Lyndsey
Hi
i can no retrace this problem. I can use in my example ctx.bind(String, object) and also ctx.bind(CompositeName, object). Have you test the first? and yuo are sure, that the ClassCastException() thrown by this method? Try to debug it step by step. Sorry, i have no more ideas.
Good Luck Roland
Hi
This is the code where the exception is occuring. If you can spot any mistakes please let me know.
Many thanks, Lyndsey.
try
{
//CurveGenRemote is the Remote interface, CurveGenImpl implements CurveGenRemote
//I have used the VAJ function Tools>>Generate RMI>>JDK1.2 Stubs & Skeletons to generate
//the remote stub for CurveGenImpl
CurveGenRemote c = new CurveGenImpl();
//bind remote object using JNDI
Hashtable env = new Hashtable();
System.out.println("trying to bind to the JNDI naming service");
env.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY, "com.ibm.ejs.ns.jndi.CNInitialContextFactory");
env.put(javax.naming.Context.PROVIDER_URL, "iiop://localhost:900");
InitialContext ctx = new InitialContext(env);
System.out.println(c);
//this is where the ClassCastException is thrown - it doesn't want to bind the object c
ctx.bind("CurveGenService", c);
}catch(Exception e)
{
System.out.println("problem binding server " + e);
}
Hi Lyndsey,
i cann't find mistakes, but i also cann't test it, why i have the tool "Generate RMI" not installed. I generate the stubs for my EJBs over the EJB-pane.
But test follow, edit your code:
} catch (Exception e) {
e.printStackTrace();
}
Then you see more details to the exception, or set a breakpoint for the debugger and use there "F5" or "Step Into" to see where the exception throwed.
Goo luck Roland
Hi Roland
Thanks for your tip. My stack trace is as below. It looks like it is a problem with the bind() as expected. By the way, I am not writing this in an EJB, this code is in a standard Java program - I am just trying to use the naming service supplied by WebSphere. I can get it working using standard RMI, but I cannot seem to use the WebSphere naming service...
Thanks for your help, Lyndsey.
problem binding server javax.naming.NamingException: CurveGenService [Root exception is java.lang.ClassCastException]
javax.naming.NamingException: CurveGenService. Root exception is java.lang.ClassCastException
java.lang.Throwable()
java.lang.Exception()
java.lang.RuntimeException()
java.lang.ClassCastException()
org.omg.CORBA.Object com.ibm.ejs.ns.jndi.CNContextImpl.connectRemoteCORBA(java.lang.Object)
org.omg.CORBA.Object com.ibm.ejs.ns.jndi.CNContextImpl.connectRemoteCORBA(java.lang.Object)
void com.ibm.ejs.ns.jndi.CNContextImpl.doBind(org.omg.CosNaming.NameComponent [], java.lang.Object)
void com.ibm.ejs.ns.jndi.CNContextImpl.bind(java.lang.String, java.lang.Object)
void javax.naming.InitialContext.bind(java.lang.String, java.lang.Object)
com.chase.irfe.chasetools.poc.curvegen.CurveGenServer()
void com.chase.irfe.chasetools.poc.curvegen.CurveGenServer.main(java.lang.String [])
Hi
Thanks for your continued help!
Not sure why it should matter what name I give it, as long as it is a String? I have tried giving it other names such as CurveGenRemote (the remote interface), and CurveGenImpl (the implementation of the remote interface), but it still doesn't work. Do you think it has anything to do with the fact that I am using the persistent name service with the WebSphere test environment?
Thanks again, Lyndsey