How to set jndi context to call EJB?

Hello!
install the j2ee sdk 1.4 on a server that has the ip address 211.83.144.48.
then I deploy a EJB ,but I want to call the method from another pc.
The problem is that how I initialize the jndi context? How can get the url for "Context.PROVIDER_URL"?
thks.

Hi there, I am having what appears to be a very similar problem.
the code I am using for gaining the initial context is as follows:
properties.put("java.naming.factory.initial",JNDI_FACT_CLASS_NAME);
properties.put("java.naming.provider.url", s);
return new InitialContext(properties);
where these instantiated variables when pulled out of the hash are :
java.naming.factory.initial : com.sun.appserv.naming.S1ASCtxFactory
java.naming.provider.url : iiop://lich.ecs.soton.ac.uk:3700
this works absolutely fine on the localhost machine, running both client and server, however when
running on seperate machines I get the same ORB_COMM error as previously stated:
WARNING: ORBUTIL.connectFailure
org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 201 completed: No at com.sun.corba.ee.impl.logging.ORBUtilSystemException.connectFailure(ORBUtilSystemException.java:1739) com.sun.corba.ee.impl.logging.ORBUtilSystemException.connectFailure(ORBUtilSystemException.java:1757)
..etc..
apparently this is caused by :
java.net.ConnectException: Connection refused
at sun.nio.ch.Net.connect(Native Method)
at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:460)
at java.nio.channels.SocketChannel.open(SocketChannel.java:146)
...etc...
the server is definately up and running, and can provide all other services to the remote client, using both the IP and the DNS resolved name, and JVT seems to work fine, just not corba look up's of a queue.
I am using the Sun Application Platform Server 8 and the standard j2EE RI versions of corba , JNDI e.t.c
if you could suggest any further reason why the localhost may be resolvable, but the remote may not I would drastically appreciate the help, as I have been scouring forums for 2 days now, and exhaused all
other potential solutions.
thanks
Tim

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Initializing jndi context to call ejb??Help!!!

hi!
I installed j2ee sdk 1.4 ,deployed a ejb on my server.I tried to call the ejb following the example given by the
book.:
import javax.naming.*;
import javax.rmi.*;
import java.util.*;
public class jndi {
public static void main(String[] args) {
try {
     Hashtable env = new Hashtable();
     Context initctx = new InitialContext();
     Object objref = initctx.lookup("java:comp/env/ejb/HelloRef");
} catch (Exception ex) {
System.err.println("Caught an unexpected exception!");
ex.printStackTrace();
the error occured:
javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
then I try to initalize the jndi context:
env.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL,"ldap://localhost:389");
Context initctx = new InitialContext(env);
It still does not work:
javax.naming.CommunicationException: localhost:389. Root exception is java.net.ConnectException: Connection refused: connect
Whatcan I do to call the ejb??

Hi, I think your original code should work ok but you should check the JNDI name of the EJB you deployed.
In order for your lookup to work properly the JNDI name of your EJB should be "java:comp/env/ejb/HelloRef" to match the lookup in your code.
Object objref = initctx.lookup("java:comp/env/ejb/HelloRef");
I'd try that first, you should find the EJB JNDI name in your deployment descriptors within the jar file.

JNDI Context Retrieval in EJB 3.0

I have a doubt about JNDI context retrieval in EJB 3.0. I know that when I call a bean from another bean I can use this line:
InitialContext ctx=new InitialContext();
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This method was the one I called when I used EJB 2.1..Now in many examples I find both these approaches...I'd like to know what differentiates one from another and which is the standard in EJB 3.0?
I read that when calling a bean from another bean I can use the first constructor with no parameters...but in clients I am obliged to give the param..why?
Thanks!

Correct me if I am wrong: the application client
container is a "static" container: you need to know
which EJB to call at develop time and you can not
change it later without recompiling.That's not quite right. First, there's nothing special about the application client
container with respect to retrieving Java EE dependencies that is not also true
of Java EE web containers and EJB containers. The programming model for
defining and accessing EE dependencies is exactly the same, independent of
whether the code is running in an Application Client, EJB container, etc.
It's true that dependencies are defined at development time, but one of the
whole reasons for the level of indirection provided by Java EE dependencies
is to allow the target of those dependencies to change without changing code.
E.g, with EJB dependencies this is done using the ejb-link attribute in ejb-ref
or ejb-local-ref. That specifies which EJB is the target of the ejb dependency
without changing the code used to retrieve the dependency.
>
JNDI was designed to be more flexible: you can
dynamically lookup EJB homes, then call a remote
method you like at runtime. Is that flexibility lost
with application client container. Is there any way
to dynamically inquiry-invoke?In the Java EE programming model, components always define what their
dependencies are so that the deployer can configure them. The idea of
doing a direct global lookup without using a Java EE dependency is
outside the scope of Java EE. It works in many implementations but the
specifics are not portable.
We have a presentation that covers some of these topics you might find
interesting. See here :
https://glassfish.dev.java.net/javaee5/ejb/compdependencies_xmlforum_nov15.pdf

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A

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Thanks,
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RETURN VARCHAR2 IS
PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
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Hello,
I am writing a servlet to call a remote EJB on another machine.
I use JNDI to lookup remote EJBHome (not) but fail.
Any advice?
Any trick to configure application-client.xml?
Thanks!

Use com.evermind.server.rmi.RMIInitialContextFactory instead
Here an example
// EmployeeClient.java
package mypackage5;
import javax.ejb.*;
import javax.naming.*;
import javax.rmi.PortableRemoteObject;
import java.io.*;
import java.util.*;
import java.rmi.RemoteException;
import com.evermind.server.ApplicationClientInitialContextFactory;
import com.evermind.server.rmi.RMIInitialContextFactory;
* A simple client for accessing an EJB.
public class EmployeeClient
public static void main(String[] args)
System.out.println("EmployeeClient.main(): client started...");
try
* initialize JNDI context by setting factory, url and credential
* in a hashtable
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.evermind.server.rmi.RMIInitialContextFactory");
//env.put(Context.INITIAL_CONTEXT_FACTORY, "com.evermind.server.ApplicationClientInitialContextFactory");
env.put(Context.PROVIDER_URL, "ormi://koushikm:23791/application4");
env.put(Context.SECURITY_PRINCIPAL, "admin");
env.put(Context.SECURITY_CREDENTIALS, "admin");
* or set these properties in jndi.properties
* or use container defaults if that's where client got launched from
Context context = new InitialContext(env);
* Lookup the EmployeeHome object. The reference is retrieved from the
* application-local context (java:comp/env). The variable is
* specified in the assembly descriptor (META-INF/application-client.xml).
Object homeObject =
context.lookup("HelloEJB");
System.out.println("EmployeeClient.main(): bean found...");
// Narrow the reference to EmployeeHome.
HelloEJBHome home =
(HelloEJBHome) PortableRemoteObject.narrow(homeObject,
HelloEJBHome.class);
System.out.println("EmployeeClient.main(): home narrowed...");
// Create remote object and narrow the reference to Employee.
HelloEJB remote =
(HelloEJB) PortableRemoteObject.narrow(home.create(), HelloEJB.class);
System.out.println("EmployeeClient.main(): remote created...");
String message=remote.helloWorld("SUCCESS");
System.out.println(message);
} catch(NumberFormatException e) {
System.err.println("NumberFormatException: " + e.getMessage());
} catch(RemoteException e) {
System.err.println("RemoteException: " + e.getMessage());
} catch(IOException e) {
System.err.println("IOException: " + e.getMessage());
} catch(NamingException e) {
System.err.println("NamingException: " + e.getMessage());
} catch(CreateException e) {
System.err.println("CreateException: " + e.getMessage());
Hello,
I am writing a servlet to call a remote EJB on another machine.
I use JNDI to lookup remote EJBHome (not) but fail.
Any advice?
Any trick to configure application-client.xml?
Thanks!

How to change JNDI service provider for EJB's?

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How can I do it?
The most simple solution is not working: to specify <jndi-name> in weblogic-ejb-jar.xml
for bean as "xxx:bean_name".
By JNDI rules for such names context factory with name com.sun.jndi.url.xxx.xxxURLContextFactory
will be used. But for Weblogic this does not work. An exception is thrown during
bean deployment -
javax.management.MalformedObjectNameException: ObjectName: Invalid value -> xxx:bean_name
at javax.management.ObjectName.validateAndAdd(ObjectName.java:440) at javax.management.ObjectName.initObjectName(ObjectName.java:409)
at javax.management.ObjectName.<init>(ObjectName.java:254) at weblogic.management.WebLogicObjectName.<init>(WebLogicObjectName.java:196)
at weblogic.management.runtime.RuntimeMBeanDelegate.register(RuntimeMBeanDelegate.java:90)
at weblogic.management.runtime.RuntimeMBeanDelegate.<init>(RuntimeMBeanDelegate.java:83)
at weblogic.ejb20.internal.BaseEJBHomeMBean.<init>(BaseEJBHomeMBean.java:33) ......................

This is not an answer on my
question - My questions was: how to force a Welogic EJB Container to BIND EJBean's
home interface to another JNDI Service provider, not Weblogic.
But you wrote how to use JNDI in general - I already know how to use it :)))
Phil.
"VSK" <[email protected]> wrote:
Hi
Have a look at the code below
private Context getInitialContext () throws NamingException
String from = "CtxHelper::getInitialContext ";
String webLogicHostUrl = t3://SERVERNAME:9001
Logger.debug(from, "Begin Method", 3);
Hashtable h = System.getProperties();
h.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory
h.put(Context.PROVIDER_URL, webLogicHostUrl);
return new InitialContext(h);
} //end getInitialContext
This way we will get the InitailContext and then do a jndi lookup using
the
Context object as follows
ctx.lookup..........
Now in the above code replace weblogic.jndi.WLInitialContextFactory by
ur
provider.
Hope this helps.
-VKS
"Phil Peshin" <[email protected]> wrote in message
news:[email protected]...
I need EJBean's home interface to be bound to another JNDI provider,not
Weblogic.
How can I do it?
The most simple solution is not working: to specify <jndi-name> inweblogic-ejb-jar.xml
for bean as "xxx:bean_name".
By JNDI rules for such names context factory with namecom.sun.jndi.url.xxx.xxxURLContextFactory
will be used. But for Weblogic this does not work. An exception isthrown
during
bean deployment -
javax.management.MalformedObjectNameException: ObjectName: Invalidvalue -> xxx:bean_name
at javax.management.ObjectName.validateAndAdd(ObjectName.java:440)at
javax.management.ObjectName.initObjectName(ObjectName.java:409)
at javax.management.ObjectName.<init>(ObjectName.java:254) atweblogic.management.WebLogicObjectName.<init>(WebLogicObjectName.java:196)
atweblogic.management.runtime.RuntimeMBeanDelegate.register(RuntimeMBeanDelega
te.java:90)
atweblogic.management.runtime.RuntimeMBeanDelegate.<init>(RuntimeMBeanDelegate
..java:83)
atweblogic.ejb20.internal.BaseEJBHomeMBean.<init>(BaseEJBHomeMBean.java:33)

How to set a context of "/" ??

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Srini

<url-pattern>*</url-pattern>
Gene
"Srini Kurella" <[email protected]> wrote in message news:[email protected]..
How can i set a context of either "" or "/" such that when i call the
URL
htpp://localhost:7001/
I go to the location specified for that context ?
Is this possible ?
Srini

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* appserv-rt.jar - available at install_dir/lib
* j2ee.jar - available at install_dir/lib
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Hi Sateesh,
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I used java.util.date and it works fine.
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I came to know that java date variabel can be passed without any extra conversion to ABAP type D variable .
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I have awarded you points for very helpful answer.
Thanks.
Ashish.

How to set jndi context to call EJB?

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