Home Stub is bound or Home object is bound in JNDI

Hi,
When I lookup Home i get home stub at client side. My question is what is bound in JNDI tree Home stub or object of Home implementation class which is implemented by Server?
thanx

My understanding:
It is the stub that gets bound to the JNDI. From the client side, we look up the JNDI for the home stub. The stub knows how to communicate with it's corresponding server object(Home) thru the skeleteon(I think the concept of skeleton in RMI is deprecated now..)

Similar Messages

Validating Cached Home Object

We cache the home objects to save on jndi lookups. But if the home
object belongs to a different application (something.ear), and
something.ear gets redeployed, the cached home object is no longer
valid.
Was wondering if there's a way to validate the cached home object.

Refer to
http://dataml.net/articles/ValidateXMLSchema/part1.htm

EJB Home Objects and Stubs

Hi,
Can anyone pls tell me,what are the objects are created in Server after the Deployment of EJB.
Is the EJB Home Object,EJB Home Object Stub,EJB Home Object Skeleton, EJB Local Home Object, EJB LocalHome Object Stub,Ejb LocalHome Object Skeleton.And Finally both the Stub objects and Skeleton Objects will be stored in the Jndi Registry ?
Thanks in Advance,
Venkat

Nic,
Caching the home object is a comon practice.
Take a look here:
http://www.theserverside.com/resources/patterns_review.jsp
Look at the EJB Home Factory Pattern.
Regards,
-Dat

Home object one for each client

1.
When client looks up for home (context.lookup("TraderHome")) :-
1.Client gets the Home Stub which was implemented by the Server, is it correct ?
2.On the server who will communicate with this client homestub? One home-object for on server ? Is it correct ?
3. So Client home-stub and server-home object one-to-one communication ?
4. Will the home-stub object carries any context from server ?(like security or user-specific context ?
5. Can we restrict so that certain user can only get the home object ?
please make me clear ...
-thanks
Praveen Sadhu.

When client looks up for home (context.lookup("TraderHome")) :-
1.Client gets the Home Stub which was implemented by the Server, is it correct ?
2.On the server who will communicate with this client homestub? One home-object for on server ? Is it correct ?
3. So Client home-stub and server-home object one-to-one communication ?
4. Will the home-stub object carries any context from server ?(like security or user-specific context ?
5. Can we restrict so that certain user can only get the home object ?
please make me clear ...
-thanks
Praveen Sadhu.

JNDI Exception while trying to create home object

Hi everyone,
I'm trying out a test application to create a home object in a remote computer. I'm using the SUN Ref-Impl v1.3 . I ran the small code below,
try {
Hashtable env= new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.cosnaming.CNCtxFactory");
env.put(Context.PROVIDER_URL, "iiop://localhost:1050");
env.put(Context.SECURITY_PRINCIPAL, "guest");
env.put(Context.SECURITY_CREDENTIALS, "guest123");
InitialContext ic= new InitialContext(env);
Object objRef= ic.lookup("jdbc/eVDB");
System.out.println("DB conn success!");
} catch (Exception ex) {
ex.printStackTrace();
System.out.println("Unable to conn DB... "+ ex.getMessage());
I successfully accessed this Database object wrapped in an entity bean through .jsp .
But when I ran the above code the follwing exception was emitted,
javax.naming.NameNotFoundException. Root exception is org.omg.CosNaming.NamingContextPackage.NotFound: IDL:omg.org/CosNaming/NamingContext/NotFound:1.0
     at org.omg.CosNaming.NamingContextPackage.NotFoundHelper.read(NotFoundHelper.java:72)
     at org.omg.CosNaming._NamingContextExtStub.resolve(_NamingContextExtStub.java:402)
     at com.sun.jndi.cosnaming.CNCtx.callResolve(CNCtx.java:440)
     at com.sun.jndi.cosnaming.CNCtx.lookup(CNCtx.java:492)
     at com.sun.jndi.cosnaming.CNCtx.lookup(CNCtx.java:470)
     at javax.naming.InitialContext.lookup(InitialContext.java:347)
     at TestJNDI.main(TestJNDI.java:26)
Unable to conn DB... null
========================
If anybody can help me I would be most grateful. Thank you.

i added the j2ee.jar and the out put changed.
when i write,
ic.lookup("eV/CheckLogin");
it successfuly created the home object.
But when I added a database JNDI reference it failed,
when i wrote,
ic.lookup("java:comp/env/jdbc/eVDB");
the following exception occures,
javax.naming.NameNotFoundException: No object bound for java:comp/env/jdbc/eVDB
     at com.sun.enterprise.naming.java.javaURLContext.lookup(javaURLContext.java:116)
     at javax.naming.InitialContext.lookup(InitialContext.java:347)
     at TestJNDI.main(TestJNDI.java:30)
and when i put,
ic.lookup("jdbc/eVDB")
the previous exception occures,
javax.naming.NameNotFoundException. Root exception is org.omg.CosNaming.NamingContextPackage.NotFound: IDL:omg.org/CosNaming/NamingContext/NotFound:1.0
     at org.omg.CosNaming.NamingContextPackage.NotFoundHelper.read(NotFoundHelper.java:72)
     at org.omg.CosNaming._NamingContextExtStub.resolve(_NamingContextExtStub.java:402)
     at com.sun.jndi.cosnaming.CNCtx.callResolve(CNCtx.java:440)
     at com.sun.jndi.cosnaming.CNCtx.lookup(CNCtx.java:492)
     at com.sun.jndi.cosnaming.CNCtx.lookup(CNCtx.java:470)
     at javax.naming.InitialContext.lookup(InitialContext.java:347)
     at TestJNDI.main(TestJNDI.java:30)
===============
<sigh> I'm stumped...

ClassCastException - While type casting Home object after EJB JNDI Lookup

Sun One Application Server throws a ClassCastException when I try to type cast Home object to it's respective interface type.
Here is the code ---
==============================================
Object obj = PortableRemoteObject.narrow( context.lookup( jndiName ), homeClass);
System.out.println("Remote Object - obj : "+obj);
if (obj != null) {
   System.out.println("obj.getClass().getName() : "+obj.getClass().getName());
   System.out.println("obj.getClass().getSuperclass() : "+obj.getClass().getSuperclass());
   Class[] interfaces = obj.getClass().getInterfaces();
   if (interfaces != null) {
      for (int count = 0; count < interfaces.length; count++) {
         System.out.println("interfaces[ " + count + " ].getName() : " + interfaces[ count ].getName());
}==============================================
The class name is dislpayed as the Stub class name.
While displaying the interfaces, the Home Interface name is displayed.
But later when I try to type cast it into Home Interface type, it throws a ClassCastException.
Can somebody please check this?

Please post the stack trace. Also, take a look at our EJB FAQ to make sure you're doing the
recommended lookup :
https://glassfish.dev.java.net/javaee5/ejb/EJB_FAQ.html

10g XE - 404 error when I click on Home Object Browser (in IE)

Greetings
I use 10g XE with my xp/sp3 system, with IE7 (initially IE8RC1-also problematic).
The problem is that if I click on Home>Object Browser
I always get a "HTTP 404 Not Found"/The "Webpage cannot be found" error message
I've followed the instructions from htp://download.oracle.com/docs/cd/B25329_01/doc/install.102/b25143/toc.htm#BABFHAEC,
I've uninstalled my antivirus (Kaspersky Internet Security 2009) and have Windows Firewall disabled
I've setup the ports needed by Oracle to my router (1521,2030,8080)
I have even started IE in safe mode(=without addons) --- iexplore -extoff
I've tried almost anything...
With other browsers (Firefox,Google Chrome, Opera)
that "Object Browser" button works ok,
BUT at other points (eg. "SQL>SQL Scripts>Create")
they all have more or less display problems (while IE shows all other things ok).
Please help :(
PS. I've read in http://kr.forums.oracle.com/forums/thread.jspa?threadID=554359
that there is a patch (#5648872) that could fix the problem,
but unfortunately http://metalink.oracle.com/ is only for Oracle's paying customers,
while I need/use Oracle 10gxe (free download) for my university lessons :( :(

Yes, of course.
Here is what I get in IE now instead of a plain 404:
the first few lines:
Mon, 23 Feb 2009 23:17:20 GMT
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-06512: at "FLOWS_020100.WWV_FLOW", line 11227
ORA-06512: at "FLOWS_020100.WWV_FLOW_CONDITIONS", line 392
ORA-06512: at "FLOWS_020100.WWV_FLOW_DISP_PAGE_PLUGS", line 717
ORA-06512: at "FLOWS_020100.WWV_FLOW_DISP_PAGE_PLUGS", line 309
ORA-06512: at "FLOWS_020100.WWV_FLOW", line 3098
ORA-06512: at "FLOWS_020100.WWV_FLOW", line 2422
ORA-06512: at "FLOWS_020100.WWV_FLOW", line 9357
ORA-06512: at "FLOWS_020100.F", line 236
ORA-06512: at line 30
DAD name: apex
PROCEDURE : f
+URL : [http://XDB|http://xdb/]+ HTTP Server:8080/apex/f?p=4500:1001:4320649656424332::NO:::
PARAMETERS :
+===========+
p:
+4500:1001:4320649656424332::NO:::+
the full page:
[http://pastebin.com/f39c20e60]
?:|

Exception when invoking create method on entity ejb's home object

I have a simple entity bean. I am able to get the reference to the entity's home object. But when I run create method on entity's home interface, I get the following exception. The create method takes no arguments as the primary key is Auto-Increment field in MYSQL database. Here is the exception. I am using jdeveloper and embedded OC4J as server.
07/06/22 15:51:15 java.lang.NullPointerException
07/06/22 15:51:15 at EmployeeHome_EntityHomeWrapper2.create(EmployeeHome_EntityHomeWrapper2.java:1168)
07/06/22 15:51:15 at com.pd.EmpAddInput.addEmployee(EmpAddInput.java:64)
07/06/22 15:51:15 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
07/06/22 15:51:15 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
07/06/22 15:51:15 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
07/06/22 15:51:15 at java.lang.reflect.Method.invoke(Method.java:585)
07/06/22 15:51:15 at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:146)
07/06/22 15:51:15 at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:92)
07/06/22 15:51:15 at javax.faces.component.UICommand.broadcast(UICommand.java:332)
07/06/22 15:51:15 at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:287)
07/06/22 15:51:15 at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:401)
07/06/22 15:51:15 at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:95)
07/06/22 15:51:15 at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:268)
07/06/22 15:51:15 at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:110)
07/06/22 15:51:15 at javax.faces.webapp.FacesServlet.service(FacesServlet.java:213)
07/06/22 15:51:15 at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:712)
07/06/22 15:51:15 at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:369)
07/06/22 15:51:15 at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:865)
07/06/22 15:51:15 at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:447)
07/06/22 15:51:15 at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:215)
07/06/22 15:51:15 at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:117)
07/06/22 15:51:15 at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:110)
07/06/22 15:51:15 at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
07/06/22 15:51:15 at oracle.oc4j.network.ServerSocketAcceptHandler.procClientSocket(ServerSocketAcceptHandler.java:239)
07/06/22 15:51:15 at oracle.oc4j.network.ServerSocketAcceptHandler.access$700(ServerSocketAcceptHandler.java:34)
07/06/22 15:51:15 at oracle.oc4j.network.ServerSocketAcceptHandler$AcceptHandlerHorse.run(ServerSocketAcceptHandler.java:880)
07/06/22 15:51:15 at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
07/06/22 15:51:15 at java.lang.Thread.run(Thread.java:595)
What may be causing this exception.

I have solved the problem. It had to do with the autocommit=true feature of the MYSQL connection. However I have ran into another trouble. I am getting the following exception.
java.lang.IllegalStateException: Can not call getPrimaryKey() inside ejbCreate(...) methods, the entity does not have an identity yet, see the EJB 2.0 specification chapter 10.5.4
     at com.evermind.server.ejb.EJBUtils.throwGetPrimaryKeyInEJBCreateException(EJBUtils.java:892)
     at EmployeeRemote_EntityBeanWrapper0.getPrimaryKey(EmployeeRemote_EntityBeanWrapper0.java:1686)
     at EmployeeHome_EntityHomeWrapper2.create(EmployeeHome_EntityHomeWrapper2.java:1055)
     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:585)
     at com.evermind.server.rmi.RmiMethodCall.run(RmiMethodCall.java:53)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
     at java.lang.Thread.run(Thread.java:595)
java.lang.IllegalStateException: Can not call getPrimaryKey() inside ejbCreate(...) methods, the entity does not have an identity yet, see the EJB 2.0 specification chapter 10.5.4
     at com.evermind.server.rmi.RMICall.EXCEPTION_ORIGINATES_FROM_THE_REMOTE_SERVER(RMICall.java:109)
     at com.evermind.server.rmi.RMICall.throwRecordedException(RMICall.java:125)
     at com.evermind.server.rmi.RMIClientConnection.obtainRemoteMethodResponse(RMIClientConnection.java:517)
     at com.evermind.server.rmi.RMIClientConnection.invokeMethod(RMIClientConnection.java:461)
     at com.evermind.server.rmi.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:63)
     at com.evermind.server.rmi.RecoverableRemoteInvocationHandler.invoke(RecoverableRemoteInvocationHandler.java:28)
     at __Proxy0.create(Unknown Source)
     at com.pd.model.EmployeeRemoteClient.main(EmployeeRemoteClient.java:37)
I am not calling getPrimaryKey() in ejbCreate() then why this exception

Caching a Home object

Reading a book that has an example with a DTOFactory creating a DTO based on information in an entity bean.
The first step in the DTOFactory's DTO creation method is the JNDI lookup of a Home object (of the entity bean from which it will make a DTO).
It says next to the JNDI lookup that "[t]his could be cached to avoid the expense of future lookups".
Is it referring to the Home object returned from the lookup as being cached? How would caching a Home object be implemented?
(I'm not too familiar with caching...would this mean just putting it in an member variable and doing a check to see if it's the first time the JNDI lookup is being requested? ... If not the first time, then skip the lookup and return the stored member variable value?)
Thanks.

(I'm not too familiar with caching...would this mean just putting it in an member variable and doing a check to see if it's the first time the JNDI lookup is being requested? ... If not the first time, then skip the lookup and return the stored member variable value?)Yes, it often looks something like
static XYZRemoteHome xyzHome;
public static synchonized XYZRemoteHome getXYZHome() {
   if (xyzHome == null) {
       ctx = getInitialContext();
       xyzHome = (XYZRemoteHome) PortableRemoteObject.narrow(ctx.lookup("XYZRemoteHome"), XYZRemoteHome.class);
   return xyzHome;
}

EJB not getting bound to JNDI name using Sun App Server upon deployment

Hello,
I've created a very simple "HelloWorld" EJB (2.1-style) and have successfully deployed it to my local application server (Sun Java System App Server Platform Edition 9.0). I now want to invoke the EJB (I have single stateless session bean that returns a string) using a simple remote client app (the client app is executing outside of the app server within its own JVM).
From my client app I am able to create the InitialContext object, but I get error when trying to lookup my EJB's home object. My client looks as follows:
               jndiProperties = new Properties();
               jndiProperties.put("java.naming.factory.initial",
                    "com.sun.jndi.cosnaming.CNCtxFactory");
               jndiProperties.put("java.naming.provider.url",
                    "iiop://localhost:3700"); // ORB listener is listening on port 3700...
               context = new InitialContext(jndiProperties);
               home = context.lookup("ejb/HelloWorldEJB"); // this line throws an exception (line 54)
               ...The exception I receive is:
               [java] 234 ERROR [main] net.blueslate.sample.ejb.helloworld.HelloWorldClient     - javax.namin
g.NameNotFoundException [Root exception is org.omg.CosNaming.NamingContextPackage.NotFound: IDL:omg.
org/CosNaming/NamingContext/NotFound:1.0]
     [java]     at com.sun.jndi.cosnaming.ExceptionMapper.mapException(ExceptionMapper.java:44)
     [java]     at com.sun.jndi.cosnaming.CNCtx.callResolve(CNCtx.java:453)
     [java]     at com.sun.jndi.cosnaming.CNCtx.lookup(CNCtx.java:492)
     [java]     at com.sun.jndi.cosnaming.CNCtx.lookup(CNCtx.java:470)
     [java]     at javax.naming.InitialContext.lookup(InitialContext.java:351)
     [java]     at net.blueslate.sample.ejb.helloworld.HelloWorldClient.main(HelloWorldClient.java:5
4)
     [java] Caused by: org.omg.CosNaming.NamingContextPackage.NotFound: IDL:omg.org/CosNaming/Naming
Context/NotFound:1.0
     [java]     at org.omg.CosNaming.NamingContextPackage.NotFoundHelper.read(NotFoundHelper.java:72
     [java]     at org.omg.CosNaming._NamingContextExtStub.resolve(_NamingContextExtStub.java:406)
     [java]     at com.sun.jndi.cosnaming.CNCtx.callResolve(CNCtx.java:440)
     [java]     ... 4 moreHere is my ejb-jar.xml:
<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar
     xmlns="http://java.sun.com/xml/ns/j2ee"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd"
     version="2.1">
     <enterprise-beans>
          <session>
               <ejb-name>HelloWorldEJB</ejb-name>
               <home>net.blueslate.sample.ejb.helloworld.HelloWorldRemoteHome</home>
               <remote>net.blueslate.sample.ejb.helloworld.HelloWorldRemote</remote>
               <local-home>net.blueslate.sample.ejb.helloworld.HelloWorldLocalHome</local-home>
               <local>net.blueslate.sample.ejb.helloworld.HelloWorldLocal</local>
               <ejb-class>net.blueslate.sample.ejb.helloworld.impl.HelloWorldImpl</ejb-class>
               <session-type>Stateless</session-type>
               <transaction-type>Container</transaction-type>
          </session>
     </enterprise-beans>
</ejb-jar>Here is my sun-ejb-jar.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sun-ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Application Server 9.0 EJB 3.0//EN" "http://www.sun.com/software/appserver/dtds/sun-ejb-jar_3_0-0.dtd">
<sun-ejb-jar>
     <enterprise-beans>
          <ejb>
               <ejb-name>HelloWorldEJB</ejb-name>
               <jndi-name>HelloWorldEJB</jndi-name>
          </ejb>
     </enterprise-beans>
</sun-ejb-jar>I believe the root cause is that my EJB is not bound to a name within the app server. If I browse the "JNDI tree" from the app server admin console, I can see there is a root element "ejb," but there is nothing underneath. I guess I just expected to find the name of my EJB, "HelloWorldEJB." I swear I could have read somewhere in the documentation for the app server that when you deploy an EJB, the name of the EJB as specified by the "<ejb-name>" element of the ejb-jar.xml deployment descriptor gets automatically bound within the naming server to its home object.
At this point I would appreciate any insight anyone might have regarding this problem. I suspect there is something extra I need to do when deploying my EJB so that its name gets binded to its home object; I just don't have a clue at this point what that is.
I should also mention that I have played with the parameter passed to 'context.lookup()' - I tried passing: "ejb/HelloWorldEJB", "HelloWorldEJB", etc - nothing seems to work. FWIW, if I just pass in "ejb", I don't receive an exception (I was glad to see this work since the JNDI tree-view from the app server admin console shows "ejb" as one of the root-elements within the naming-tree - this indicated to me I was on the right track in my diagnosis of the problem; i.e., it's probably not a connectivity or protocol issue)
Thank you very much for your time and help.

Nevermind folks - I got it to work. All my configuration was correct; I had other issues with the ejb-jar file that the verifier informed me of (my previous deployments were with the verifier turned-off).

Exception in finding the Home object Please Help

Hi All,
I am learning EJB. I wrote a bean called Hello Bean(from examples) which just prints out Hello. I tried calling it from the client program and I get this exception
javax.naming.NameNotFoundException: Unable to resolve HelloLocalHome. Resolved:
'' Unresolved:'HelloLocalHome' ; remaining name ''
at weblogic.rmi.internal.BasicOutboundRequest.sendReceive(BasicOutboundR
equest.java:85)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteR
ef.java:255)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteR
ef.java:222)
at weblogic.rmi.internal.ProxyStub.invoke(ProxyStub.java:35)
at $Proxy0.lookup(Unknown Source)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:323)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at examples.HelloClient.main(HelloClient.java:21)
The HelloClient code at line 21 where it threw me this exception is
Object obj=ctx.lookup("HelloLocalHome");
Can someone help me out with this.
In the web logic server console I saw the bean deployed. I understand from that the bean is deployed. Please someone help me out in this.

Hello Sir,
Thanks for the reply.When I saw the web logic server console , in the EJB list I had my enterprise bean there. Infact I uploaded my bean from the console. Will you please clarify this .
Thanks a lot
shyam

Problem in getting Home object of EJB in WebLogic 6.1

Hello,
I have deployed my stateless session bean with remote interfaces on my weblogic server but when i tried to access it from my client which is also present in the same application (ear) then it gives the following exception.
java.lang.ExceptionInInitializerError
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:42)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:30)
at java.lang.reflect.Constructor.newInstance(Constructor.java:277)
at java.lang.Class.newInstance0(Class.java:301)
at java.lang.Class.newInstance(Class.java:254)
at javax.rmi.CORBA.Util.createDelegateIfSpecified(Util.java:342)
at javax.rmi.CORBA.Util.<clinit>(Util.java:54)
at javax.rmi.PortableRemoteObject.createDelegateIfSpecified(PortableRemoteObject.java:182)
at javax.rmi.PortableRemoteObject.<clinit>(PortableRemoteObject.java:61)
at jsp_servlet.__login._jspService(__login.java:123)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2495)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2204)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
Caused by: java.lang.RuntimeException: could not find or instantiate any UtilDelegate class
at weblogic.iiop.UtilDelegateImpl.<clinit>(UtilDelegateImpl.java:73)
... 18 more
My code is like :
UserRegistrationHome loginuser;
Context initial = new InitialContext();
Object objref = initial.lookup("ejb/SimpleUserRegistration");
loginuser =(UserRegistrationHome) PortableRemoteObject.narrow(objref,UserRegistrationHome.class);
UserRegistration userlogin = loginuser.create();
It comes at line with PortableRemoteObject.......
Will some one help me in this regard, as why this exception generally comes and in what settings....
Thanks in advance.
SAC

Can you tell me how resolve the problem?
Thanks,
Michael
[email protected]

Clustered Remote Object Bound To JNDI

Hello,
          I'd like to know if Weblogic 5.1 (service pack 10) supports
          clusterable remote objects.
          What I am trying to do is to implement a remote object that extends
          UnicastRemoteObject interface and bind it to JNDI. When the client
          needs the services, it will lookup that object in JNDI and call its
          methods remotely.
          What happens to my test implementation is that it all works well when
          I run Weblogic locally, but if it is run on the remote server, it
          gives me the exception to the extend that the stub for my remote
          object is not found (although it is in the classpath). I understand
          that this is because I should be using weblogic.rmic instead of
          regular rmic, is that right?
          Thanks,
          Eugene Kononov.


Hello,
          I'd like to know if Weblogic 5.1 (service pack 10) supports
          clusterable remote objects.
          What I am trying to do is to implement a remote object that extends
          UnicastRemoteObject interface and bind it to JNDI. When the client
          needs the services, it will lookup that object in JNDI and call its
          methods remotely.
          What happens to my test implementation is that it all works well when
          I run Weblogic locally, but if it is run on the remote server, it
          gives me the exception to the extend that the stub for my remote
          object is not found (although it is in the classpath). I understand
          that this is because I should be using weblogic.rmic instead of
          regular rmic, is that right?
          Thanks,
          Eugene Kononov.

Unable to retreive RMI object bound to JNDI

Hi
I am trying to retrieve an rmi object that appears to have been sucessfully
deployed to the weblogic server. Upon startup the nt command console shows
the message below and the class name appears in the Distributed objects/rmi
area in the Weblogic console.
Invoking main-style startup Guid xxxxxx.GuidImpl
However if I try to write a test client using either one of the following
calls I get a NameNotFoundException.
I have tried both the name Guid (which is what is in the startup entry) and
the fully qualified name. They all have the same results.
Sample calls:
Naming.lookup("Guid");
or
getInitialContext();
jndiContext.lookup("Guid");
In my weblogic properties files I have the following entry:
weblogic.system.startupClass.Guid=xxx.GuidImpl
in the main of GuidImpl class I have the following entry:
Naming.bind("xxx.Guid");
any ideas as to what might be wrong?
Thanks

Hi, all:
Currently I evaluate BEA Weblogic 6.1 server. I've read the "Programming
WebLogic JNDI" section of the documentation for Weblogic server 6.1.
However, I couldn't find the answer for my question. What problem I have
now is that
(1): How I can create a object in the Java VM when the Weblogic server
startup? Note:
This class need to read a property files and
store all of properties information into its instance for the
client program to lookup it later.
(2): How can the previous created object to be bound in the Weblogic
JDNI server and the bounded
object can be shown up in the JDNI tree in the Weblogic server's
console?
(3): How do I code my servlet to lookup that object I
just created in the step1? What configuration settings need to be
done before Weblogic server is started?
Because I am stopped by this problem, if anyone can give me the example
code or some explanation of the solution ASAP,
it would be very appreciated....Thanks in advance.......
Merry Christmas
Long

Trouble in storing and retrieving RMI object in Weblogic 7 JNDI tree.

I have created a simple server (BankImpl), implementing a RMI interface
called Bank. A stub class (BankImpl_Stub.class) is generated from BankImpl
class using
"rmic -v1.2". Then I bind an instance of the BankImpl class to the JNDI tree
in Weblogic
server 7 under the name of "PeopleBank".
After the binding, I can see the stub class in the JNDI tree, but with a
different name: BankImpl_WLStub.class). when a
client program is trying to lookup the stub associated with "PeopleBank", it
failed with a puzzling message:
java.io.NotSerializableException: BankImpl_WLStub
Why a stub of a RMI object is not serializable? Does Weblogic needs a
different rmic to generate RMI stubs?
Thanks,
Lian

I have created a simple server (BankImpl), implementing a RMI interface
called Bank. A stub class (BankImpl_Stub.class) is generated from BankImpl
class using
"rmic -v1.2". Then I bind an instance of the BankImpl class to the JNDI tree
in Weblogic
server 7 under the name of "PeopleBank".
After the binding, I can see the stub class in the JNDI tree, but with a
different name: BankImpl_WLStub.class). when a
client program is trying to lookup the stub associated with "PeopleBank", it
failed with a puzzling message:
java.io.NotSerializableException: BankImpl_WLStub
Why a stub of a RMI object is not serializable? Does Weblogic needs a
different rmic to generate RMI stubs?
Thanks,
Lian

Home Stub is bound or Home object is bound in JNDI

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