JBoss 4.0 JNDI from standalone program

[psseshwari]

Hi,

I'm trying to do a JNDI lookup of the MBean jmx/invoker/RMIAdaptor from a standalone Java program. Here is the snippet of the code.

Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
env.put(Context.PROVIDER_URL, "jnp://localhost:1100");
env.put(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces");
InitialContext ctx = new InitialContext(env); // From jndi.properties
MBeanServerConnection server = (MBeanServerConnection) ctx.lookup("jmx/invoker/RMIAdaptor");

But I'm getting the following exception:

Could not obtain connection to any of these urls: 192.168.2.100:1100 and discovery failed with error: javax.naming.CommunicationException: Failed to retrieve stub from server 192.168.2.100:1100 [Root exception is java.io.StreamCorruptedException: unexpected block data] [Root exception is javax.naming.CommunicationException: Failed to retrieve stub from server 192.168.2.100:1100 [Root exception is java.io.StreamCorruptedException: unexpected block data]]

Can anyone please help?

Thanks,
Eshwari

[myawn]

I have the same issue described by the original post (which doesn't seem to have garnered any replies)

Here is a complete program which exhibits the error:

public class EJB30Client {

 public static void main(String[] args) throws Exception {


 InitialContext ctx = getInitialContext();
 WSDLMgrRemote mgr = (WSDLMgrRemote)ctx.lookup(WSDLMgrRemote.class.getName());
 }

 public static InitialContext getInitialContext() throws Exception {
 Hashtable props = getInitialContextProperties();
 return new InitialContext(props);
 }

 private static Hashtable getInitialContextProperties() {
 Hashtable<String,String> props = new Hashtable<String,String>();
 props.put("java.naming.factory.initial",
 "org.jnp.interfaces.NamingContextFactory");
 props.put("java.naming.factory.url.pkgs",
 "org.jboss.naming:org.jnp.interfaces");
 props.put("java.naming.provider.url",
 "jnp://localhost:1100");
 return props;
 }
}

The class should be resolvable in the AS; here are some of the startup messages:

07:27:45,942 INFO [ProxyDeployer] no declared remote bindings for : com.kenai.examine.wsdl.WSDLMgr
07:27:45,942 INFO [ProxyDeployer] there is remote interfaces for com.kenai.examine.wsdl.WSDLMgr
07:27:45,942 INFO [ProxyDeployer] default remote binding has jndiName of com.kenai.examine.wsdl.WSDLMgrRemote

Also, one of the debugging snippets that was given in the FAQ was to do a context.listBindings() -- that fails with the same error.

The failure is

Exception in thread "main" javax.naming.CommunicationException: Could not obtain connection to any of these urls: localhost:1100 and discovery failed with error: javax.naming.CommunicationException: Failed to retrieve stub from server 10.1.1.79:1100 [Root exception is java.io.StreamCorruptedException: unexpected block data] [Root exception is javax.naming.CommunicationException: Failed to retrieve stub from server localhost:1100 [Root exception is java.io.StreamCorruptedException: unexpected block data]]
 at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1399)
 at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:579)
 at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572)
 at javax.naming.InitialContext.lookup(Unknown Source)
 at com.kenai.examine.wsdl.EJB30Client.main(EJB30Client.java:7)

Any pointers appreciated . . .

[starksm64]

http://wiki.jboss.org/wiki/Wiki.jsp?page=ClusteringFAQ

[delkant]

hi there.(first: my english is not the best.. :))

I have try these with two jboss servers jboss4.0.2 and jboss4.0.3SP1, after some little errors i get all working, i will put here some tips where i was stack in my tests,

my source:

the ejb-jar.xml file significative part:

<!-- Session Beans -->

[CDATA[Description for DelkantSession]]
<display-name>Name for DelkantSession</display-name>

<ejb-name>DelkantSession</ejb-name>

py.wpg.DelkantSessionHome
<!--this interfaces are require-->
py.wpg.DelkantSession
<local-home>py.wpg.DelkantSessionLocalHome</local-home>
py.wpg.DelkantSessionLocal
<ejb-class>py.wpg.DelkantSessionBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>



the DelkantSessionBean.class :

/**
* @ejb.bean name="DelkantSession"
* display-name="Name for DelkantSession"
* description="Description for DelkantSession"
* jndi-name="ejb/delkant"
* type="Stateless"
* view-type="both"
* transaction-type = "Container"
*/
public class DelkantSessionBean implements SessionBean {
/**
* @ejb.interface-method view-type = "both"
* @ejb.transaction type = "Required"
*
*/
public String getSaludo(){
return "hola mundo / hello world / a string";
}

//all the methods from the SessionBean Implementation.
}


the DelkantTestClient.class (Standalone-client):


public class DelkantTestClient {
public static void main(String[] args) {
try{
System.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
System.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces");
System.setProperty("java.naming.provider.url", "localhost:1099");
//Use them to get the context
Context context = new InitialContext(System.getProperties());
DelkantSessionHome home = (DelkantSessionHome) context.lookup("ejb/delkant");
String data= home.create().getSaludo();


System.out.println("lookup(ejb/delkant): " + data);
}catch (Exception e){
System.out.println("Exception "+e);
e.printStackTrace();
}
}
}

and that is all from the sources part, them we need to put two jars libraries in the DelkantTestClient classpath from the $JBOSS_HOME/client the jbossall-client.jar and the logkit.jar.
we also need the delkantClient.jar, here i put all the interfaces that i need to do a cast when i make the lookup.

that is.

CUESTION: i need a ear2ear comunication, i probe all but i dont get the way to comunicate a ejb Session from one application.ear to a second application2.ear

how do i get a remote interface from another application?? can i do something like new InitialContext( application.ear2 ); i dont understand how this work..

thanks..

[pepeanto]

Hello:

I am developing an application using JBoss 4.0.5. JBoss is running in cluster and is offering support for ejb3.

A test client is supposed to contact the ejb through HAJNDI. It was working OK using JNDI, but when trying to contact the ejb using HAJNDI I had exactly the same problem as you do.

Luckily I was able to solve it adding some libraries to my client´s classpath.

I give you the whole list of libraries I was using:

concurrent.jar
jboss.jar
jboss-annotations-ejb3.jar
jboss-aop-jdk50.jar
jboss-aspect-library-jdk50.jar
jboss-common.jar
jboss-ejb3.jar
jboss-ejb3x.jar
jboss-j2ee.jar
jboss-remoting.jar
jbosssx.jar
jboss-transaction.jar
jnpserver.jar
junit.jar


The ones I was missing (and caused the hajndi problem) were:

jbossha.jar
jboss-serialization.jar.

I hope that can help.