RMI-IIOP

[one_special_user]

Hello,

I have a stateful SessionBean (EJB 2.x) called "MySession" being accessed via IIOP and having a Property "MySessionID".

Within it's ejbCreate() it should register itself within the JNDI under "mysessions/" + its "MySessionID", just like "mysessions/mysessionid_123", from where it can be looked up again by a client and invoked (via IIOP).

The reason for this is a C#-Client (talking IIOP via the "IIOP.Net" - Tool) doing some jobs and a Web-Application acting as "Client" to the C#-Client again by invoking its methods. Therefore all the Communication has to be IIOP.

Within the ejbCreate() i bind the MySession-Instance to the JNDI via

Context ctx = new InitialContext();
Object mysession_ref = this.context.getEJBObject();
MySessionRemote ms = (MySessionRemote)
 PortableRemoteObject.narrow(
 mysession_ref,
 MySessionRemote.class );
String jndi = "mysessions/" + mysessionid;
try {
 ctx.rebind( jndi, ms );
} catch (NameNotFoundException nnfe) {
 // create subcontext and try rebinding
 ctx.createSubContext( "mysessions" );
 ctx.rebind( jndi, ms );
}

This works fine, the Instance is bound to JNDI (says the JNDIView-MBean),
BUT the problem is:
The MySessionHome is bound to "iiop/MySession", as the DeploymentDescriptor states it should be accessible via JRMP AND IIOP,
whereas the Instances are bound to mysessions/mysessionid_123", and therefore cannot be looked up via the IIOP-Client.

How do i tell JBoss to bind them as "iiop/mysessions/mysessionid_123" ?
I don't want to put the "common iiop-necessary" properties like "corbaloc::hostname:port/JBoss/Naming/root" to the Constructor of the InitialContext (I think this spoils clustering??)


Please help me, it's my diploma-thesis and I'm running out of time (like every college-student I think ... ), I really appreciate any help ;) !

[one_special_user]

Hm propbably I should rephrase it:

Binding the current Instance of MySession seems to bind a RMI-Stub to the JNDI: "mypackage.mysession._MySession_Stub"...
And it's basically bound to "mysessions/mysessionid_123".
If I state context.rebind( "iiop/mysessions/" + mysessionid, ms ) I cannot look it up by my Java-Client neither via JRMP nor via IIOP ( always get a javax.naming.CommunicationException) ...


How to obtain an InitialReference not for JRMP but for IIOP, but not using Properties for the constructor?

[one_special_user]

It's me ... again :-)


Ok, i tried a different approach.
I've got a SessionBean A and a SessionBean B.
Have to use IIOP as stated above.

My ejb-jar.xml looks as follows:

<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar version="2.1" 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 http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd">
 <display-name>MyStuff-ejb</display-name>

 <enterprise-beans>
 <session>
 <display-name>B</display-name>
 <ejb-name>B</ejb-name>
 <home>mypkg.BHome</home>
 <remote>mypkg.B</remote>
 <ejb-class>mypkg.BBean</ejb-class>
 <session-type>Stateful</session-type>
 <transaction-type>Container</transaction-type>
 </session>
 <session>
 <display-name>A</display-name>
 <ejb-name>A</ejb-name>
 <home>mypkg.AHome</home>
 <remote>mypkg.A</remote>
 <ejb-class>mypkg.ABean</ejb-class>
 <session-type>Stateless</session-type>
 <transaction-type>Container</transaction-type>
 <ejb-ref>
 <ejb-ref-name>ejb/A</ejb-ref-name>
 <ejb-ref-type>Session</ejb-ref-type>
 <home>mypkg.AHome</home>
 <remote>mypkg.A</remote>
 <ejb-link>A</ejb-link>
 </ejb-ref>
 </session>
 </enterprise-beans>

 <assembly-descriptor>
 <container-transaction>
 <method>
 <ejb-name>B</ejb-name>
 <method-name>*</method-name>
 </method>
 <trans-attribute>Required</trans-attribute>
 </container-transaction>
 <container-transaction>
 <method>
 <ejb-name>A</ejb-name>
 <method-name>*</method-name>
 </method>
 <trans-attribute>Required</trans-attribute>
 </container-transaction>
 </assembly-descriptor>
</ejb-jar>

My jboss.xml looks as follows:

<?xml version="1.0" encoding="UTF-8"?>
<jboss>
 <enterprise-beans>

 <session>
 <ejb-name>A</ejb-name>
 <jndi-name>mystuff/A</jndi-name>
 <invoker-bindings>
 <invoker>
 <invoker-proxy-binding-name>iiop</invoker-proxy-binding-name>
 </invoker>
 </invoker-bindings>
 </session>

 <session>
 <ejb-name>B</ejb-name>
 <jndi-name>mystuff/B</jndi-name>
 <invoker-bindings>
 <invoker>
 <invoker-proxy-binding-name>iiop</invoker-proxy-binding-name>
 </invoker>
 </invoker-bindings>
 </session>

 </enterprise-beans>
</jboss>

A makes use of B, so i have to look it up in order to invoke.
In ABean, I've tried to look up B via
Context ctx = new InitialContext()
followed by either
"ctx.lookup("java:comp/env/ejb/VFMSession")" or "ctx.lookup( "mystuff/B" )", but none works.
How to get a reference to BHome??!

Should I change my jndi.properties?

java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces

#java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces

[one_special_user]

Ok, the status so far:


My C#-Client can lookup the SessionBeans and invoke them.
But I just don't get any Java-Client to retrieve any SessionBean.
Nevertheless, JNDIView states all EJBs are bound to right JNDI-Names.

Now I'm already getting a reference at the clientside, but narrowing causes a NullPointerException:

 public static Properties getJBOSSProperties() {
 Properties props = new Properties();
 String factoryName = "org.jnp.interfaces.NamingContextFactory";
 String providerURL = "iiop://localhost:2255";
 String factoryPkgs = "org.jboss.naming:org.jnp.interfaces";
 props.put(Context.INITIAL_CONTEXT_FACTORY, factoryName);
 props.put(Context.PROVIDER_URL, providerURL);
 props.put(Context.URL_PKG_PREFIXES, factoryPkgs);
 return props;
 }


...

 Properties props = getJBOSSProperties();
 Context ctx = new InitialContext( props );
 System.out.println( "Got InitialContext!" );
// some other SessionBeans-Names, but doesn't matter //
 String jndi = "vfmcontroller/VFMController";
 Object obj_ref = ctx.lookup( jndi );
 System.out.println( "Got Reference: " + jndi );
 System.out.println( "Class: " + obj_ref.getClass() );



 VFMControllerHome home = (VFMControllerHome)PortableRemoteObject.narrow( obj_ref, VFMControllerHome.class );
 VFMController controller = home.create();
 System.out.println( "Got VFMController: " + controller.getTime() );

StackTrace:

Got InitialContext!
log4j:WARN No appenders could be found for logger (org.jnp.interfaces.NamingContext).
log4j:WARN Please initialize the log4j system properly.
Got Reference: vfmcontroller/VFMController
Class: class org.omg.stub.javax.ejb._EJBHome_Stub
Exception in thread "main" java.lang.NullPointerException
 at test.TestKlasse.main(TestKlasse.java:93)

I've tried all combinations of Properties (INITIAL_CONTEXT_FACTORY, PROVIDER_URL, URL_PKG_PREFIXES) with corresponding values and I think i have included all clientside-necessary JARs (jbossall-client.jar etc).

WHAT AM I DOING WRONG?

I've searched the web and found all just the same but no solution works for me.

Please tell me, which jar's to be included (serverside/clientside) or specific configurations which might cause problems... :-/