Java client ejb access

Hi
Am I correct in thinking that if I require a browser based Java
client to access an EJB that I have to perform the following ....
SETUP for the browsers
1) You need to remove the iiop10.jar file from the
...Netscape/Communicator/Program/Java/Classes directory. Renaming
this
file is not enough - you must remove it.
2) You need to copy $ORACLE_HOME/lib/aurora_client.jar
$ORACLE_HOME/lib/vbjorb.jar and $ORACLE_HOME/lib/vbjapp.jar into
the
...Netscape/Communicator/Program/Java/Classes directory.
aurora_client.jar is 2.3MB! This effectively means ejb's are
totally useless in the real world if you want to access them from
a browser over the internet.
Somebody please tell me there's an alternative or even better
it's not true.
Thanks
ritchie
null

Check the JNDI name specified in the xml file.
Hope this will help
Ashish Mangla

Similar Messages

How a stand-alone java client to access EJB?

I have problems to access a ejb.
====================================
client code:
Properties prop = new Properties();
prop.setProperty(Context.INITIAL_CONTEXT_FACTORY,"com.sun.enterprise.naming.SerialInitContextFactory");
          prop.setProperty (Context.PROVIDER_URL,"IIOP://127.0.0.1:1050");
          System.err.println("Attempting to create context...");
          Context init = new InitialContext( prop );
          Object obj = init.lookup("hi_bean");
          hihome home =(hihome)PortableRemoteObject.narrow(obj, hihome.class);
          hi c= home.create();
          System.out.println(c.greeting());
====================================================
in Dos. I have the following command:
java -Dorg.com.CORBA.ORBInitialHost=127.0.0.1 hiclient
I already open the EJB application on J2EE server on port 80, but run hiclient
in dos, it has ClassCastException coming from the code :
hihome home =(hihome)PortableRemoteObject.narrow(obj, hihome.class);
dose anyone have any ideas about this?
Thanks

Check the JNDI name specified in the xml file.
Hope this will help
Ashish Mangla

I have deployed a simple session bean with one business method.I created a simple java client to access.

Hi,
It depends upon your client program. You can use a java rmi based client or a web application. The good kick start to the problem would be to have a look into the java pet store example and converter example which is using RMI port for client access as well as web based access. Please review the examples shipped along with iAS and I'm sure that you will have a good idea on going about the coding.
Regards
Raj

Creating multiple stateful session beans from a java client. (EJB 3.0)

I'm having difficulties with the following:
To access the ShoppingCartBean, I have to put the following annotation in my standalone java client:
@EJB
private static ShoppingCartRemote shoppingCartBean;
The static must be there, thus only one ShoppingCartBean will exist within my java client. But as the ShoppingCartBean is a stateful session bean, I want to be able to get different beans of the same type.
What is the correct way to do this in EJB 3.0?

Great question. Because Home interfaces have been removed for the EJB 3.0 simplified
API, stateful session bean creation happens as a side-effect of injection. However, the
same is true of EJB 3.0 business interface lookups. The easiest way to create additional
stateful session beans is to lookup the same dependency that was declared via your
@EJB annotation.
E.g.,
// Assuming the declaring class is pkg1.ShoppingCartClient.java
InitialContext ic = new InitialContext();
ShoppingCartRemote scr1 = (ShoppingCartRemote)
ic.lookup("java:comp/env/pkg1.ShoppingCartClient/shoppingCartBean");
Note that the name relative to java:comp/env is the default associated with your
@EJB annotation since the name() attribute wasn't used. Alternatively, you
could have used :
@EJB(name="scb") private static ShoppingCartRemote shoppingCartBean;
InitialContext ic = new InitialContext();
ShoppingCartRemote scr1 = (ShoppingCartRemote) ic.lookup("java:comp/env/scb");
Yet another alternative is to declare the @EJB at the class-level. This just defines
the dependency without any injection, which is fine if you want to create a bunch of
them via lookup anyway.
@EJB(name="scb", beanInterface=ShoppingCartRemote.class)
public class .... {

How to use Enterprise Seriver with java Client

Hello.
I'd like to access Enterprise Services that are provided by Test Drive from Java Client.
Access the Enterprise Services Workplace Systems [original link is broken]
I've known how to find services and how to test a service.
I've got .wsdl file.
But I have no idea that I should do next.
Let me know how to create proxy from Enterprise Service's wsdl files.
Thanks,
Koji.

Hi Koji,
You can test your webservices using the software XMLSpy. which you can download from here and its free.
http://www.altova.com/download/xmlspy/xml_editor_enterprise.html
Regards
Sumit Bhutani

Looking up EJBs from a java client

While trying to migrate my application from standalone-oc4j
to Oracle Application Server 10g, I ran into the following problem.
My application has a stateless session bean. When trying to lookup the bean (from a java client), I get the following exception:
javax.naming.NamingException: Lookup error: javax.naming.AuthenticationException
Invalid username/password for UnifyoccEAR (ias_admin)
My code used the username/password I used to log into web-based console (which I used to deploy the application). The lookup code follows:
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
OracleJASLayer.INITIAL_CONTEXT_FACTORY);
env.put(Context.PROVIDER_URL, "ormi://localhost:3201/UnifyoccEAR");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, username);
env.put(Context.SECURITY_CREDENTIALS, password);
Context ctx = new InitialContext(env);
Object obj = ctx.lookup("unify/nxj/controlCenters/occ/ControlCenterEJB");
On a whim, I tried the old SCOTT/TIGER username/password and got the following
exception:
javax.naming.NoPermissionException: Not allowed to look up unify/nxj/controlCenters/occ/ControlCenterEJB,
check the namespace-access tag setting in orion-application.xml for details
So evidently, SCOTT/TIGER is in the security database used by the app (but isn't
authorized) while the ias_admin user is not in the security database.
I have the following questions:
1. In the default configuration, is there a username/password I can use to
lookup EJB homes in the jndi namespace of an OC4J instance? If so, what
is it?
2. Where is the security database? I tried looking in the web-based console
to find how to configure security and could not figure it out. I did find
the Security page for the application, but when I tried to add a user,
it had no effect. Furthermore, this page did not show a user entry for
SCOTT; hence, it doesn't seem that OC4J is actually using the information
on this page. This is strange because the path to this page is:
Farm > Application Server: ias_admin.lab10.sac.unify.com > OC4J: home > Application: UnifyoccEAR > Security
I then went to the Security page for the default application and found
that it did have a SCOTT user. So I added a new user and tried to run
my java client. This resulted in the javax.naming.AuthenticationException
described above (I was expected the NoPermissionException encounted when
using SCOTT/TIGER). Next, I used the Security page for the default application
to change the password for SCOTT and reran my java client using SCOTT/TIGER.
This time I was expecting an AuthenticationException exception, but got the
NoPermission exception. Therefore, it seems that OC4J isn't using this
security data either.
Hunting in the console (again) for the security database, I stumble accross
the Infrasturcture page and see an Identity Management section and see that
it is configure to use an Oracle Internet Directory server. Using
<ORACLE_HOME>/bin/oidadmin, I connect to the directory server and look
for the SCOTT user. I don't find it, so I believe that this can't be the
security database either.
3. Finally, how do I configure the OC4J instance such that it will allow
anonymous users to lookup my EJB from a java client?
Please help a confused and frustrated user.

Looking at your example, it looks like you are using a J2EE client container or some properties file to specify the JNDI environment used to create the initial context (for you use the no-arg constructor to InitialContext). Since our application needs to the ability to dynamically connect to ejb's running on different Java application servers (e.g., WebLogic, WebSphere, JBoss), such an approach will not work. Instead we must do it the old-fashioned way and pass the jdni connection info to the InitialContext constructor.
In any event, our problem isn't how to write the connection code, it is how to test it. Specifically, we can't figure out a valid username/password that will allow us to look up the home. Nor can we figure out how to configure security for the oc4j instance.

Creating a simple java client for a session EJB local interface

Hi all
Is it possible to create a simple java client for a session ejb local interface with JDeveloper.
The problem is that it creates a test client for a remote interface only...
i.e.
MySessionEJB sessionEJB = context.lookup("MySessionEJB")
and once i try to adjust it manually for the local interface...
MySessionEJBLocal sessionEJB = (MySessionEJBLocal) context.lookup("MySessionEJBLocal") (MySessionEJBLocal - is the name of my local interface)
it generates the exception:
javax.naming.NotFoundException: SessionEJBLocal not found
at...........................(RMIClientContext.java:52)
There is still no problem with accessing the local interface object from the jsf project where i've added <ejb-local-ref> tag into the web.xml file.
but i need the possibility of testing the simple java client for the local interface to test business methods wich should return objects without indirect properties
Thanks in advance.
Alex.

Pedja thanks for reply.
I still dont understand what is wrong with my example.
The first peace of the code i wrote (getting the reference to the remote interface object) works pretty well, and even more it is produced automatically by JDeveloper, so why we cant get a reference to the local interface object the same way?
Certanly we should use the local interface for getting access to the resource functioning under the same local jvm and i think it doesnt metter wich app server we really use wls or oas or others
Thanks. Alex.

RMI - EJB Standalone Java client

Hello,
We have a standalone Java client attempting to invoke a EJBs running on OC4J. We get a user not allowed to access namespace...check orion-application.xml file... Any ideas what could be the problem.
Regards.

Hi,
In access namespace tag of your orion-application.xml, you should specify the same user as the one used by your java client.
Hope that helps
regards

Error while running EJB from java client on JBOSS

Hi
As i am new to EJB i have created a helloworld application in ejb which is working fine when i try to call it from servlet but when i try to invoke the same ejb from java client (i.e from diff jvm) on jboss i got the following error:
javax.naming.CommunicationException: Could not obtain connection to any of these urls: localhost:1099 and discovery failed with error: javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed out] [Root exception is javax.naming.CommunicationException: Failed to connect to server localhost:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused]]]
     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(InitialContext.java:351)
     at com.gl.TestClient.main(TestClient.java:39)
Caused by: javax.naming.CommunicationException: Failed to connect to server localhost:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused]]
     at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:254)
     at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1370)
     ... 4 more
Caused by: javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused]
     at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:228)
     ... 5 more
Caused by: java.net.ConnectException: Connection refused
     at java.net.PlainSocketImpl.socketConnect(Native Method)
     at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
     at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
     at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
     at java.net.Socket.connect(Socket.java:519)
     at java.net.Socket.connect(Socket.java:469)
     at java.net.Socket.<init>(Socket.java:366)
     at java.net.Socket.<init>(Socket.java:266)
     at org.jnp.interfaces.TimedSocketFactory.createSocket(TimedSocketFactory.java:69)
     at org.jnp.interfaces.TimedSocketFactory.createSocket(TimedSocketFactory.java:62)
     at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:224)
     ... 5 more
Following is my code:
Home Interface:
package com.gl;
import javax.ejb.CreateException;
public interface testHome extends EJBHome {
     String JNDI_NAME = "testBean";
     public     test create()
     throws java.rmi.RemoteException,CreateException;
Remote Interface:
package com.gl;
import java.rmi.RemoteException;
import javax.ejb.EJBObject;
public interface test extends EJBObject {
     public String welcomeMessage() throws RemoteException;
Bean:
package com.gl;
import java.rmi.RemoteException;
import javax.ejb.EJBException;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
public class testbean implements SessionBean {
     public void ejbActivate() throws EJBException, RemoteException {
          // TODO Auto-generated method stub
     public void ejbPassivate() throws EJBException, RemoteException {
          // TODO Auto-generated method stub
     public void ejbRemove() throws EJBException, RemoteException {
          // TODO Auto-generated method stub
     public void setSessionContext(SessionContext arg0) throws EJBException,
               RemoteException {
          // TODO Auto-generated method stub
     public void ejbCreate(){}
     public String welcomeMessage(){
          return "Welcome to the World of EJB";
ejb-jar.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">
<ejb-jar>
<enterprise-beans>
<session>
<ejb-name>testBean</ejb-name>
<home>com.gl.testHome</home>
<remote>com.gl.test</remote>
<ejb-class>com.gl.testbean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</session>
</enterprise-beans>
</ejb-jar>
jboss.xml:
<?xml version='1.0' ?>
<!DOCTYPE jboss PUBLIC "-//JBoss//DTD JBOSS 3.2//EN" "http://www.jboss.org/j2ee/dtd/jboss_3_2.dtd">
<jboss>
<enterprise-beans>
<entity>
<ejb-name>testBean</ejb-name>
<jndi-name>testBean</jndi-name>
</entity>
</enterprise-beans>
</jboss>
Client code:
package com.gl;
import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;
public class TestClient {
     public static void main(String[] args) throws Exception{
               try{
               /*     Properties props=new Properties();
                    props.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
                    props.put(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces");
                    props.put(Context.PROVIDER_URL, "jnp://localhost:1099");
               Properties props = new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
props.put(Context.PROVIDER_URL, "localhost:1099");
                    System.out.println("Properties ok");
                    //env.setProperty(Context.INITIAL_CONTEXT_FACTORY,"org.jboss.naming.HttpNamingContextFactory");
                    //env.put(Context.PROVIDER_URL,"http://localhost:8080");
                    //env.put(Context.SECURITY_PRINCIPAL, "");
                    //env.put(Context.SECURITY_CREDENTIALS, "");
                    Context ctx=new InitialContext(props);
                    System.out.println("context ok");
                    //testHome home = (testHome)ctx.lookup("testBean");
                    Object obj = ctx.lookup ("testBean");
                    System.out.println("ojb = " + obj);
                    testHome ejbHome = (testHome)PortableRemoteObject.narrow(obj,testHome.class);
               test ejbObject = ejbHome.create();
               String message = ejbObject.welcomeMessage();
                    System.out.println("home ok");
                    System.out.println("remote ok");
                    System.out.println(message);
                    catch(Exception e){e.printStackTrace();}
I am able to successfully deployed my ejb on JBOSS but i m getting above error when i am trying to invoke ejb from java client.
kindly suggest me something to solve this issue.
Regards
Gagan
Edited by: Gagan2914 on Aug 26, 2008 3:28 AM

Is it a remote lookup? Then maybe this will help:
[http://wiki.jboss.org/wiki/JBoss42FAQ]
- Roy

Can't access a bpel process from a standalone java client

Hi i am using soa suite 10.1.3 and i'm trying to invoke a bpel process from a java client
I am using the tutorial from this page: http://www.oracle.com/technology/products/ias/bpel/pdf/orabpel-Tutorial7-InvokingBPELProcesses.pdf but i am trying to do the client in eclipse
my class from where i want to invoke the proces looks like this:
import java.rmi.RemoteException;
import java.util.Map;
import com.oracle.bpel.client.Locator;
import com.oracle.bpel.client.ServerException;
import com.oracle.bpel.client.dispatch.IDeliveryService;
import com.oracle.bpel.client.NormalizedMessage;
public class Invoke {
     public static void main (String args[])
          try {
               Locator locator = new Locator("default", "bpel", (String)null);
               IDeliveryService deliveryService =(IDeliveryService)locator.lookupService(IDeliveryService.SERVICE_NAME );
               String xml =
                    "<ssn xmlns=\"http://services.otn.com\">123456789</ssn>";
               NormalizedMessage nm = new NormalizedMessage( );
               nm.addPart("payload", xml );
               NormalizedMessage res =
                    deliveryService.request("CreditRatingService", "process", nm);
                    Map payload = res.getPayload();
          } catch (ServerException e) {
               e.printStackTrace();
          } catch (RemoteException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
The problem that i had firs was that the security.properties file could not be found in the config directory of the projects root. I think i resolved this problem by copying the context.properties file from teh rmi tutorial from the folder 102.InvokingProcesses and rename it.
After this the error that occure was that the file ejb.properties could not be found in the same directory as the security file.
Does anyone know how to resolve this problem or where did i miss anythink?
I tried until now all the examples in the tutorial step by step and i couldnt manage to run one
Thanks
Best Regards Corneliu

Thanks now it is working(i think)
but i have a nother problem
i got the folowing error:
java.lang.Exception: Failed to create "ejb/collaxa/system/DeliveryBean" bean; exception reported is: "javax.naming.NamingException: Lookup error: javax.naming.AuthenticationException: Not authorized; nested exception is:
     javax.naming.AuthenticationException: Not authorized [Root exception is javax.naming.AuthenticationException: Not authorized]
my context.properties file looks:
orabpel.platform=ias_10g
java.naming.factory.initial=com.evermind.server.rmi.RMIInitialContextFactory
java.naming.provider.url=opmn:ormi://RO1CC29C:6003:oc4j_soa/orabpel
java.naming.security.principal=oc4jadmin
java.naming.security.credentials=welcome1
I haven't change any pasword since i have instaled the SOA Suite
is the user and password right for a default user and password?

Finding an EJB object. Web clients vs. Java clients

From what I've read this is the process for a web client to find an EJB object: the client uses JDNI to find a reference to the EJBHome interface and then it uses the create method from this interface which makes the container to begin to work, creating an instance of the implementation class and an instance of the EJBObject interface, and returning a reference to the EJBObject, which will be used by the client to call the methods.
Are there any differences if the client is a java application and not a web client?

The Java Client talk to the server with random ports
not 80. Gives me a headache. _*why?
There's no need to get headaches about it, in fact no need to worry about it at all.
Just have the JNDI services available so you can do the lookup (which might require opening a port (or more than one) on the firewall, but that's it.
And that's no different between a standalone client and a web application client. Both need to do that JNDI lookup.

Accessing Coherence Extend* Proxy Deployoed on Weblogic Coherence Cluster from Java Client

Hi,
I am trying to access Extend Proxy through Thick Java Client
Followed steps as per below links and deployed a GAR on 3 Server ( 2 Storage Enabled Coherence Cluster and 1 Coherence Storage Disabled Extend Proxy Enabled). I could see ExtendProxyService using JMX and can see Port running on the System.
Ref :
Setting Up Coherence*Extend - 12c (12.1.2)
http://docs.oracle.com/middleware/1212/coherence/COHAG/deploy_options.htm#CHDJBJDI
Issue :
When I tried to Execute Java Client to Connect to Proxy Server it Connects to Port and then Disconnects with ConnectionException as below.
Observer below Lines in Box is show he Connected Socket with Port 9099 which is Extend Proxy Port
Error Message
2013-11-08 14:55:55.114/1.202 Oracle Coherence GE 12.1.2.0.0 <D5> (thread=TcpClientRemoteService:TcpInitiator, member=n/a): Started: TcpInitiator{Name=TcpClientRemoteService:TcpInitiator, State=(SERVICE_STARTED), ThreadCount=0, Codec=Codec(Format=POF), Serializer=com.tangosol.io.DefaultSerializer, PingInterval=0, PingTimeout=30000, RequestTimeout=30000, ConnectTimeout=10000, SocketProvider=[email protected], RemoteAddresses=WrapperSocketAddressProvider{Providers=[[DTC37446E9C6CBD/127.0.0.0:9099]]}, SocketOptions{LingerTimeout=0, KeepAliveEnabled=true, TcpDelayEnabled=false}}
2013-11-08 14:55:55.146/1.234 Oracle Coherence GE 12.1.2.0.0 <D5> (thread=main, member=n/a): Connecting Socket to 127.0.0.0:9099
2013-11-08 14:55:55.146/1.234 Oracle Coherence GE 12.1.2.0.0 <Info> (thread=main, member=n/a): Connected Socket to 127.0.0.0:9099
2013-11-08 14:55:55.161/1.249 Oracle Coherence GE 12.1.2.0.0 <Info> (thread=main, member=n/a): Error establishing a connection with 127.0.0.0:9099: com.tangosol.net.messaging.ConnectionException: TcpConnection(Id=null, Open=true, LocalAddress=0.0.0.0:54384, RemoteAddress=127.0.0.0:9099)
2013-11-08 14:55:55.161/1.249 Oracle Coherence GE 12.1.2.0.0 <Error> (thread=main, member=n/a): Error while starting service "TcpClientRemoteService": com.tangosol.net.messaging.ConnectionException: could not establish a connection to one of the following addresses: [127.0.0.0:9099]; make sure the "remote-addresses" configuration element contains an address and port of a running TcpAcceptor
    at com.tangosol.coherence.component.util.daemon.queueProcessor.service.peer.initiator.TcpInitiator.openConnection(TcpInitiator.CDB:121)
    at com.tangosol.coherence.component.util.daemon.queueProcessor.service.peer.Initiator.ensureConnection(Initiator.CDB:11)
    at com.tangosol.coherence.component.net.extend.remoteService.RemoteCacheService.openChannel(RemoteCacheService.CDB:7)
    at com.tangosol.coherence.component.net.extend.RemoteService.doStart(RemoteService.CDB:11)
    at com.tangosol.coherence.component.net.extend.RemoteService.start(RemoteService.CDB:5)
    at com.tangosol.coherence.component.util.SafeService.startService(SafeService.CDB:53)
    at com.tangosol.coherence.component.util.safeService.SafeCacheService.startService(SafeCacheService.CDB:5)
    at com.tangosol.coherence.component.util.SafeService.ensureRunningService(SafeService.CDB:27)
    at com.tangosol.coherence.component.util.SafeService.start(SafeService.CDB:14)
    at com.tangosol.net.ExtensibleConfigurableCacheFactory.startService(ExtensibleConfigurableCacheFactory.java:681)
    at com.tangosol.net.ExtensibleConfigurableCacheFactory.ensureService(ExtensibleConfigurableCacheFactory.java:599)
    at com.tangosol.coherence.config.scheme.AbstractCachingScheme.realizeCache(AbstractCachingScheme.java:50)
    at com.tangosol.coherence.config.scheme.AbstractBundlingScheme.realizeCache(AbstractBundlingScheme.java:31)
    at com.tangosol.net.ExtensibleConfigurableCacheFactory.ensureCache(ExtensibleConfigurableCacheFactory.java:254)
    at com.tangosol.net.CacheFactory.getCache(CacheFactory.java:205)
    at com.tangosol.net.CacheFactory.getCache(CacheFactory.java:182)

If this proxy design (not starting up due to a invalid entry in "authroized-hosts") is on-purpose from Coherence Engineers - then it should be re-visited.
I think the PROXY Server should just log a message stating about the invalid DNS entry for the Authorized-host and continue with the startup...Failing to start completely doesn;t make sense since one cannot rely completely on DNS to
say everything should be correct before a server start.
Ofcourse you can overcome by writing your own Custom Filter - but the issue pop's out as with any custom filter(s) is maintaining them along the road (with all minor/major coherence upgrades).
Also - this "Authorized-Hosts" concept should be carefully analyzed particularly for the following issues...
(1) if the client IP is changed in the DNS server - will the proxy-server allow the new Client connection without any issues? when will the PROXY server flush its CLIENT DNS entries or what is the TTL time-limit for a CLIENT cached through Authorized-hosts by the PROXY-SERVER?
(2) Suppose, we have a CLIENT in the "Authroized-Hosts" making a valid connection to the PROXY and putting some cache into the SERVER CACHE through the PROXY....now if the IP-address (DNS being the same) of the CLIENT is changed - can the CLIENT can GET the CACHE it just PUT into the SERVER without any ERRORS?
(3) How often we need to re-start PROXIES? Do we need to re-start them often for the DNS issues (if any) mentioned above?
Looks like the Limited documentation & examples for Coherence*Extend - particularly for .NET & C++ clients & *Extend Proxies is a point of concern.
vk

Problem running Java client of EJB deployed on WebSphere

Hi,
I am using websphere studio 5.1.2 with fix pack 3. I have a sample Stateless Session Bean (EJB) deployed and running on websphere.
I wrote a small Java client program as below.
import java.util.Hashtable;
import HelloJavaHome;
import HelloJava;
import javax.naming.InitialContext;
import javax.naming.Context;
import javax.ejb.EJBHome;
import javax.ejb.EJBObject;
public class RemoteConn {
public static void main(String[] ar) throws Exception{
String greeting = "";
try{
Hashtable env = new Hashtable();
//env.put(Context.INITIAL_CONTEXT_FACTORY, "com.ibm.websphere.naming.WsnInitialContextFactory");
//env.put(Context.INITIAL_CONTEXT_FACTORY, "com.ibm.ejs.ns.jndi.CNInitialContextFactory");
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.ibm.ws.naming.util.WsnInitCtxFactory");
//env.put(Context.PROVIDER_URL, "corbaloc:iiop:myhost.mycompany.com:2809/NameServiceCellPersistentRoot");
env.put(Context.PROVIDER_URL, "iiop://localhost:2809");
System.out.println("Before creating context ");
InitialContext initContext = new InitialContext(env);
System.out.println("Before looking up HelloJavaHome.");
//Object obj = initContext.lookup("java:comp/env/ejb/HelloJavaHome");
Object obj = initContext.lookup("ejb/HelloJavaHome");
System.out.println("After lookup javahome.");
HelloJavaHome home = (HelloJavaHome) javax.rmi.PortableRemoteObject.narrow(obj, HelloJavaHome.class);
HelloJava remote = home.create();
greeting = remote.getGreeting("John");
catch(Exception e){
e.printStackTrace();
System.out.println("Greeting::"+ greeting);
I did not have any problem if I write and run this client from Websphere studio environment..
However its giving lot of compilation and runtime errors when I tried to run from command line.
I could eliminated compilation errors by setting the below jar files in the classpath.
testclient.jar; (client jar of my EJB)
j2ee.jar;
naming.jar;ras.jar;
wsexception.jar;
bootstrap.jar;
namingclient.jar;
websphere.jar;server.jar;
ejbcontainer.jar;
ecutils.jar;
Now it is throwing runtime error after the statement, "Before looking up HelloJavaHome.", has printed. Here is the stack trace of exception ..
Exception in thread "main" java.lang.NoClassDefFoundError: com.ibm.CORBA.iiop.GlobalORBFactory
at com.ibm.ejs.oa.EJSORBImpl.class$(EJSORBImpl.java:44)
at com.ibm.ejs.oa.EJSORBImpl.initializeORB(EJSORBImpl.java:195)
at com.ibm.ejs.oa.EJSClientORBImpl.(EJSClientORBImpl.java:93)
at com.ibm.ejs.oa.EJSClientORBImpl.(EJSClientORBImpl.java:65)
at com.ibm.ejs.oa.EJSORB.init(EJSORB.java:385)
at com.ibm.ws.naming.util.Helpers.getOrb(Helpers.java:284)
at com.ibm.ws.naming.util.WsnInitCtxFactory.getInitialContextInternal(WsnInitCtxFactory.java:369)
at com.ibm.ws.naming.util.WsnInitCtx.getContext(WsnInitCtx.java:112)
at com.ibm.ws.naming.util.WsnInitCtx.getContextIfNull(WsnInitCtx.java:422)
at com.ibm.ws.naming.util.WsnInitCtx.lookup(WsnInitCtx.java:143)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at RemoteEJBConn.main(RemoteEJBConn.java:38)
I appreciate if sombody could help me ASAP fixing this problem.
Thanks in advance.

Try using the IBM JVM (theres one shipped with WebSphere in websphere_home\AppServer\java
Also include idl.jar and ffdc.jar on the classpath

EJB access from C++ client / Failover+LoadBalancing

We are accessing an EJB from VisiBroker for C++. The EJB is deployed in a WLS cluster.
Trying to achieve something like 'failover', we discovered that VisiBroker supports
multiloc addresses, so we are able to start our client as follows:
./client -ORBInitRef NameService=corbaloc::server1:8001,:server2:8002/NameService
As a result, server2 is only used when NameService of server1 is not available.
After connecting to a distinct NameService in a cluster, all further IIOP calls
are routed to this cluster server only. If the server shuts down, a new NameService
connection has to be made to get access to the other server and its objects.
Is this correct so far?
For the idea of 'load balancing' our EJB accesses, we didn't find a solution -
so it seems that this is completely impossible or is there any trick we could
use?
Thanks for your help
ml

"Marko Lorentz" <[email protected]> writes:
We are accessing an EJB from VisiBroker for C++. The EJB is deployed in a WLS cluster.
Trying to achieve something like 'failover', we discovered that VisiBroker supports
multiloc addresses, so we are able to start our client as follows:
./client -ORBInitRef NameService=corbaloc::server1:8001,:server2:8002/NameService
As a result, server2 is only used when NameService of server1 is not available.
After connecting to a distinct NameService in a cluster, all further IIOP calls
are routed to this cluster server only. If the server shuts down, a new NameService
connection has to be made to get access to the other server and its objects.
Is this correct so far?
For the idea of 'load balancing' our EJB accesses, we didn't find a solution -
so it seems that this is completely impossible or is there any trick we could
use?If you use the Tuxedo 8.1 C++ client, then you will get per-request
load-balancing and failover. The C++ client is free to WLS licensees.
andy

Can we access a webservice registered to OWSM gateway using java client

Hi all,
Can we access a webservice registered to owsm gateway using a java client.
Thank you.

Using com.oracle.bpel.client.Locator to obtain a connection to the BPEL PM.
how can we invoke a web service if it is registered with OWSM is there any java api
to do this.
What are the possible ways we can invoke a web service registered to OWSM?

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