Help requested: call session bean over network

Hi
I want to know how to call a session bean on the application server from a normal java program on another machine on the network.
I plan to create a stateful bean in the application server; Make it return its context ( i assume i need to serialise it before sending the context over) to my program. Alternatively I can try to send the EJB handle back.
once my program gets the context or the handle back, I will create a new stateless bean in the application server and pass this context or handle so that it can locate the stateful bean to get the data in it
please advise
thanx
Gaurav
ps> I know the issue involves RMI and security issues but I dont know in depth exactly how to go about it .

Just code a simple client and hit the EJB. (Assuming the m/c is in the LAN).
If there is a firewall between the m/cs, i am sorry my dear friend you will have to go extra miles to do so.
Refer to:
http://www.ftponline.com/javapro/2002_09/online/j2ee_asankaran_09_03_02/default_pf.aspx
Kshitij.

Similar Messages

Calling Session Beans in JSP ?

Hi Folks,
I am new to EJB3, I am doing simple applicatuions.
Can any one please tell me how to call session beans in jsp page.
for example my case is.. iam entering two diffrent data, lets say user name and password in jsp page and this should go in data base thru JPA (entity beans)
Iam able to enter data from JPA in data base but if the same i have to fetch from JSP page.. iam not getting..!
I would really appretiate for your help i need it urgent...!
thanks in advance.

abishek1983 wrote:
Hi Folks,
I am new to EJB3, I am doing simple applicatuions.
Can any one please tell me how to call session beans in jsp page.
Not. You can, technically, but you shouldn't. JSP should be for display purposes only, containing no Java code whatsoever.
for example my case is.. iam entering two diffrent data,Wrong. You cannot possibly have "2 data", the very concept is impossible.
You can have "2 data items" which is probably what you intended to say?
lets say user name and password in jsp page and this should go in data base thru JPA (entity beans)
Iam able to enter data from JPA in data base but if the same i have to fetch from JSP page.. iam not getting..!
Same way you insert them. Of course JPA entities are distinctly different from entity beans. The very concept of entity beans no longer exists in the context of JPA, it's solely used to mean EJB 2.1 or earlier entity beans.
I would really appretiate for your help i need it urgent...!
It's not urgent.

How to call session bean's method in JSP

Hi All,
I am working on a JSF web application by using sun studio creator.
The first page have a button, the onClick javascript is as following, which bring up a alert box showing user login name.
In JSP file, how can I call session bean's setUserName(String name) function (which I would like to store this UserName). So the following pages can use this information.
If I can not do it this way, is there any other way to do it?
Thanks in advance.
var net = new ActiveXObject("wscript.network");
alert(net.UserName);
In managed-beans.xml
<managed-bean>
<managed-bean-name>BasicInfo</managed-bean-name>
<managed-bean-class>treepractice.BasicInfo</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>

You can find more information/details/examples at their own website.
On the other hand, do you realize that that ActiveX stuff is IE proprietary? And that it is a browser configuration whether to allow them or not? And that this configuration is in IE7 defaulted to an (annoying) warning box before execution which is just bad for the user experience?
With other words, forget that ActiveX garbage. Alternatives are Applets (not recommended) or Java Web Start (recommended).

Call session bean in message driven bean

Is it a best practice calling a session bean every time arrive a message in a message driven bean?
Regards
Message was edited by:
gionnyDeep

Why not?
You can call Session Bean from a Message Driven Bean as long as your J2EE Server is able to handle the messages.

How call session bean from Client side

Hi
calling session bean from client side it gives Lookup erroe, it gives JNDI error
how we know session bean is working. in Admin tree bean statis is reb Flaf, and ID is "Down" how we activate it..
null

If you can make a connection using sess_sh, then you know that you have configured your database and listener properly. If it is not working, read the manuals that you can download from technet. They are pretty good, and if you follow the directions, you should see success.
Good Luck!
Brad

Calling session bean's business method through web dynpro component

Hi All,
Can anybody tell me how to call a session bean's methods through a web dynpro WITHOUT java-model or web service model ??
I have following scenario:-
1. Stateless Session bean having two business methods
2. Web Dynpro component
3.Now i want to call business methods without using any model. I have got following piece of code but I dont know how to go about it.
4.Where do i have to set JNDI name for session bean? which interface will be looked for?
5. Do I have to declare public part for EJB DC? If yes, how?
//This is inside web dynpro component
InitialContext context = new InitialContext();
o = context.lookup(JNDIName);
TestSessionbeanHome homeRef = (TestSessionbeanHome) PortableRemoteObject.narrow( o,
TestSessionbeanHome.class);
TestSessionbean beanRef = homeRef.create();
<returnValue> = beanRef.<ejb method name>
Please help to get a step-by-step approach to this case.
Thanks and regards,
Amey Mogare

Hi,
If I comment out the part that is using session bean's business method, DC is building fine.
And if I uncomment, then compiler is unabl eto resolve business method(s).
And i would like to mention that my EJB + J2EE App DC is building properly, but it havent yet deployed properly as I am waiting for data-source-alias name prefix to be configured by ERP team. So will this be a reason why Web Dynpro DC is not able to resolve business methods ??
Because Web Dynpro DC is able to resolved all interfaces of Session bean and entity bean. But when it comes to business method, its not able to resolve.
Any more ideas why it is not happening?
Pls help.
Now i went through some forum posts regarding this and found that we also need to add EJB DC to Java Build Path for WebDynproDC>Properties>Java Build Path.
I did this and now it is able to resolve business methods and DTOs as well. So to summarize I did following:-
1. Added EJB DC (complete DC) as a Used DC to Web Dynpro DC with Buid-n-Deploy-n-Run time dependency
2. Added Sharing reference of J2EE application DC to Web Dynpro DC -->Properties
This reference I constructed as follows:-
<vendorname>/<name of j2ee application as appearing under display name tag in application.xml (replacing '/' with '~')>
So my Sharing Reference becomes:- <vendorname>/reqpstapscreqpstapja_reqid
3. Added EJB DC to Java Build Path in Web Dynpro DC's properties
4. Then I added following piece of code to get object of SessionBean class
InitialContext context = new InitialContext();
Object o = context.lookup("java:comp/env/ejb/SessionRequestIDBean");
SessionRequestIDHome homeRef = (SessionRequestIDHome) PortableRemoteObject.narrow(o, SessionRequestIDHome.class);
SessionRequestID beanRef = homeRef.create();
beanRef.<business method>
But After doing this I am facing another problem :-
The build fails saying it is not able find the package for DTOs. But when I see the Component Controller's code it is not showing any red or yellow marks.
Can anybody pls help me out here?
Thanks and regards,
Amey Mogare

Problem when calling session bean from main.

Hi everyone
I get the following error when calling a session bean from main(String args[]).
Sep 3, 2008 9:11:13 AM com.sun.enterprise.appclient.MainWithModuleSupport <init>
WARNING: ACC003: Application threw an exception.
java.lang.NullPointerException
at databasetest.Main.main(Main.java:26)
Here is my code beneath.
I'm using netbeans and glassfish application server.
Everything is in the same project, called DatabaseTest, I also have deployed the application before running the client.
I'm running the client as follows, right click on the DatabaseTest-app-client and select run.
The client:
package databasetest;
import com.test.UsersFacadeRemote;
import javax.ejb.EJB;
import com.test.Users;
public class Main {
    @EJB
    private static UsersFacadeRemote usersFacade;
    public static void main(String[] args) {
        Users users = new Users(12, 34);
        usersFacade.create(users);
}The remote facade I'm calling:
package com.test;
import java.util.List;
import javax.ejb.Remote;
@Remote
public interface UsersFacadeRemote {
    void create(Users users);
    void edit(Users users);
    void remove(Users users);
    Users find(Object id);
    List<Users> findAll();
}The stateless bean:
package com.test;
import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless
public class UsersFacade implements UsersFacadeRemote {
    @PersistenceContext
    private EntityManager em;
    public void create(Users users) {
        em.persist(users);
    public void edit(Users users) {
        em.merge(users);
    public void remove(Users users) {
        em.remove(em.merge(users));
    public Users find(Object id) {
        return em.find(com.test.Users.class, id);
    public List<Users> findAll() {
        return em.createQuery("select object(o) from Users as o").getResultList();
}

looks like you're banging your head against the same brick wall as [I have done|http://forums.sun.com/thread.jspa?forumID=13&threadID=5317110] and [others have in the past|http://forums.sun.com/thread.jspa?forumID=136&threadID=5259913] if that's any consolation.
Funny thing is, mine did actually work in the debugger but not when running!
Strange thing that.
I did initially interest someone from the developers but they couldn't really help, ended up saying : try instantiating your beans the EJB 2.1 way and see where that gets you. Yes that works but they promised us "hey no more dopey xml deployment descriptors just some cool annotations" didn't they?
I've got the feeling were' missing something really obvious!
Edited by: sebthebike on 03-Sep-2008 12:21

MapSystemException when calling Session Bean

Hi all,
I have the following problem:
I created and deployed a Session Bean but when I want to call the method the bean is offering I get the following exception:
java.rmi.ServerException: RemoteException occurred in server thread; nested exce
ption is:
        java.rmi.RemoteException
        at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.mapSystemException(Util.ja
va:170)
        at javax.rmi.CORBA.Util.mapSystemException(Util.java:65)
        at guiaccess._EventDBSelectionIF_Stub.getEvents(Unknown Source)
        at guiaccess.MonitorGUI.getEventsFromSelection(MonitorGUI.java:329)
        at guiaccess.MonitorGUI.initGUI(MonitorGUI.java:68)
        at guiaccess.MonitorGUI.<init>(MonitorGUI.java:49)
        at guiaccess.MonitorGUIApp.main(MonitorGUIApp.java:14)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at com.sun.enterprise.util.Utility.invokeApplicationMain(Utility.java:28
5)
        at com.sun.enterprise.appclient.Main.<init>(Main.java:420)
        at com.sun.enterprise.appclient.Main.main(Main.java:92)
Caused by: java.rmi.RemoteException
        at com.sun.enterprise.iiop.POAProtocolMgr.mapException(POAProtocolMgr.ja
va:213)
        at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:79
7)
        at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInv
ocationHandler.java:137)
        at $Proxy69.getEvents(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(Reflecti
veTie.java:117)
        at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispa
tchToServant(CorbaServerRequestDispatcherImpl.java:651)
        at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispa
tch(CorbaServerRequestDispatcherImpl.java:190)
        at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest
Request(CorbaMessageMediatorImpl.java:1653)
        at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest
(CorbaMessageMediatorImpl.java:1513)
        at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleInput(C
orbaMessageMediatorImpl.java:895)
        at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.call
back(RequestMessage_1_2.java:172)
        at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest
(CorbaMessageMediatorImpl.java:668)
        at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.dispatc
h(SocketOrChannelConnectionImpl.java:375)
        at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.read(So
[...]The bean is EventDBSelectionBean and offers the method public int getEvents() throws RemoteException;, the remote home interface is called EventDBSelectionHome and the remote interface is EventDBSelectionIF. Within the same application I implemented and deployed other session beans which wirk perfectly fine.
Has anyone an idea what could be wrong??
Best regards
Gino

Hello Gino...am facing exactly the same problem...Did you get any tip ou solution to this case?
Sincerely,
Fred Durao.

Need help with JSP - Session Bean scenario

I have massive problems with a simple JSP <--> Statefull Session Bean scenario with Server Platform Edition 8.2 (build b06-fcs)
What I do is generating a Collection in session bean returning it to JSP
and giving the List back to Session Bean.
A weird exception happens when giving the List back to Session Bean
(see Exception details below)
The same code runs without any trouble on Jboss Application Server 4.0.3
Any help would be great!
Please see code below
Statefull Session Bean
<code>
package ejb;
import data.Produkt;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import javax.ejb.*;
* This is the bean class for the WarenkorbBean enterprise bean.
* Created 17.03.2006 09:53:25
* @author Administrator
public class WarenkorbBean implements SessionBean, WarenkorbRemoteBusiness, WarenkorbLocalBusiness {
private SessionContext context;
// <editor-fold defaultstate="collapsed" desc="EJB infrastructure methods. Click the + sign on the left to edit the code.">
// TODO Add code to acquire and use other enterprise resources (DataSource, JMS, enterprise bean, Web services)
// TODO Add business methods or web service operations
* @see javax.ejb.SessionBean#setSessionContext(javax.ejb.SessionContext)
public void setSessionContext(SessionContext aContext) {
context = aContext;
* @see javax.ejb.SessionBean#ejbActivate()
public void ejbActivate() {
* @see javax.ejb.SessionBean#ejbPassivate()
public void ejbPassivate() {
* @see javax.ejb.SessionBean#ejbRemove()
public void ejbRemove() {
// </editor-fold>
* See section 7.10.3 of the EJB 2.0 specification
* See section 7.11.3 of the EJB 2.1 specification
public void ejbCreate() {
// TODO implement ejbCreate if necessary, acquire resources
// This method has access to the JNDI context so resource aquisition
// spanning all methods can be performed here such as home interfaces
// and data sources.
// Add business logic below. (Right-click in editor and choose
// "EJB Methods > Add Business Method" or "Web Service > Add Operation")
public Collection erzeugeWarenkorb() {
//TODO implement erzeugeWarenkorb
ArrayList myList = new ArrayList();
for (int i=0;i<10;i++)
Produkt prod = new Produkt();
prod.setID(i);
prod.setName("Produkt"+i);
myList.add(prod);
return myList;
public void leseWarenkorb(Collection Liste) {
//TODO implement leseWarenkorb
Iterator listIt = Liste.iterator();
while(listIt.hasNext())
Produkt p = (Produkt)listIt.next();
System.out.println("Name des Produktes {0} "+p.getName());
</code>
<code>
package data;
import java.io.Serializable;
* @author Administrator
public class Produkt implements Serializable {
private int ID;
private String Name;
/** Creates a new instance of Produkt */
public Produkt() {
public int getID() {
return ID;
public void setID(int ID) {
this.ID = ID;
public String getName() {
return Name;
public void setName(String Name) {
this.Name = Name;
</code>
<code>
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<%@page import="java.util.*"%>
<%@page import="data.*"%>
<%@page import="javax.naming.*"%>
<%@page import="javax.rmi.PortableRemoteObject"%>
<%@page import="ejb.*"%>
<%--
The taglib directive below imports the JSTL library. If you uncomment it,
you must also add the JSTL library to the project. The Add Library... action
on Libraries node in Projects view can be used to add the JSTL 1.1 library.
--%>
<%--
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
--%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<h1>Online Shop Warenkorb Test</h1>
<%--
This example uses JSTL, uncomment the taglib directive above.
To test, display the page like this: index.jsp?sayHello=true&name=Murphy
--%>
<%--
<c:if test="${param.sayHello}">

Hello ${param.name}!
</c:if>
--%>
<%
Context myEnv = null;
WarenkorbRemote wr = null;
// Context initialisation
try
myEnv = (Context)new javax.naming.InitialContext();
/*Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.NamingContextFactory");
//env.put(Context.PROVIDER_URL, "jnp://wotan.activenet.at:1099");
env.put(Context.PROVIDER_URL, "jnp://localhost:1099");
env.put(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces");
myEnv = new InitialContext(env);*/
catch (Exception ex)
System.err.println("Fehler beim initialisieren des Context: " + ex.getMessage());
// now lets work
try
Object ref = myEnv.lookup("ejb/WarenkorbBean");
//Object ref = myEnv.lookup("WarenkorbBean");
WarenkorbRemoteHome warenkorbrhome = (WarenkorbRemoteHome)
PortableRemoteObject.narrow(ref, WarenkorbRemoteHome.class);
wr = warenkorbrhome.create();
ArrayList myList = (ArrayList)wr.erzeugeWarenkorb();
Iterator it = myList.iterator();
while(it.hasNext())
Produkt p = (Produkt)it.next();
%>
ProduktID: <%=p.getID()%><br></br>Produktbezeichnung:
<%=p.getName()%><br></br><%
wr.leseWarenkorb(myList);
catch(Exception ex)
%><p style="color:red">Onlineshop nicht erreichbar</p><%=ex.getMessage()%>
<% }
%>
</body>
</html>
</code>
the exception
CORBA MARSHAL 1398079745 Maybe; nested exception is: org.omg.CORBA.MARSHAL: ----------BEGIN server-side stack trace---------- org.omg.CORBA.MARSHAL: vmcid: SUN minor code: 257 completed: Maybe at com.sun.corba.ee.impl.logging.ORBUtilSystemException.couldNotFindClass(ORBUtilSystemException.java:8101) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:1013) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:879) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_abstract_interface(CDRInputStream_1_0.java:873) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_abstract_interface(CDRInputStream_1_0.java:863) at com.sun.corba.ee.impl.encoding.CDRInputStream.read_abstract_interface(CDRInputStream.java:275) at com.sun.corba.ee.impl.io.IIOPInputStream.readObjectDelegate(IIOPInputStream.java:363) at com.sun.corba.ee.impl.io.IIOPInputStream.readObjectOverride(IIOPInputStream.java:526) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:333) at java.util.ArrayList.readObject(ArrayList.java:591) 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.sun.corba.ee.impl.io.IIOPInputStream.invokeObjectReader(IIOPInputStream.java:1694) at com.sun.corba.ee.impl.io.IIOPInputStream.inputObject(IIOPInputStream.java:1212) at com.sun.corba.ee.impl.io.IIOPInputStream.simpleReadObject(IIOPInputStream.java:400) at com.sun.corba.ee.impl.io.ValueHandlerImpl.readValueInternal(ValueHandlerImpl.java:330) at com.sun.corba.ee.impl.io.ValueHandlerImpl.readValue(ValueHandlerImpl.java:296) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:1034) at com.sun.corba.ee.impl.encoding.CDRInputStream.read_value(CDRInputStream.java:259) at com.sun.corba.ee.impl.presentation.rmi.DynamicMethodMarshallerImpl$14.read(DynamicMethodMarshallerImpl.java:333) at com.sun.corba.ee.impl.presentation.rmi.DynamicMethodMarshallerImpl.readArguments(DynamicMethodMarshallerImpl.java:393) at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:121) at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatchToServant(CorbaServerRequestDispatcherImpl.java:648) at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatch(CorbaServerRequestDispatcherImpl.java:192) at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequestRequest(CorbaMessageMediatorImpl.java:1709) at com.sun.corba.ee.impl.protocol.SharedCDRClientRequestDispatcherImpl.marshalingComplete(SharedCDRClientRequestDispatcherImpl.java:155) at com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.invoke(CorbaClientDelegateImpl.java:184) at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:129) at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:150) at com.sun.corba.ee.impl.presentation.rmi.bcel.BCELStubBase.invoke(Unknown Source) at ejb._WarenkorbRemote_DynamicStub.leseWarenkorb(_WarenkorbRemote_DynamicStub.java) at org.apache.jsp.index_jsp._jspService(index_jsp.java:122) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:105) at javax.servlet.http.HttpServlet.service(HttpServlet.java:860) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:336) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:297) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:247) at javax.servlet.http.HttpServlet.service(HttpServlet.java:860) at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:249) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAsPrivileged(Subject.java:517) at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:282) at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:165) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:257) at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:55) at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:161) at java.security.AccessController.doPrivileged(Native Method) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:263) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551) at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:225) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:173) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:132) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:933) at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:189) at com.sun.enterprise.web.connector.grizzly.ProcessorTask.doProcess(ProcessorTask.java:604) at com.sun.enterprise.web.connector.grizzly.ProcessorTask.process(ProcessorTask.java:475) at com.sun.enterprise.web.connector.grizzly.ReadTask.executeProcessorTask(ReadTask.java:371) at com.sun.enterprise.web.connector.grizzly.ReadTask.doTask(ReadTask.java:264) at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:281) at com.sun.enterprise.web.connector.grizzly.WorkerThread.run(WorkerThread.java:83) Caused by: java.lang.ClassNotFoundException ... 69 more ----------END server-side stack trace---------- vmcid: SUN minor code: 257 completed: Maybe

Hi,
I have found a way out by passing the reference of my EJB in the HttpSession object and using it inside the javabean..

Session management in session bean calling session bean

Hi,
          I've got another question on transaction.
          I have following stateless session beans :
          session1 with trans-attribute Required.
          session2 with trans-attribute Required.
          session1 calls session2 and session3.
          session2 inserts/updates records in the database.
          What am doing is first I call a createSchedule method in session2, which
          creates a new record in the database.
          And then I call an update method on the session2 bean, that will fetch and
          update the newly created record.
          This second update fails, due to some database constraints.
          What I was hoping, that the record should not be created in the database,
          but it did.
          The first method call in session2 succeeded and the second failed !!
          Doesnt both the DML be part of one transaction ?
          Thanks
          Amit


Solved this one too :
          What was happening was, Before I called the create method of the session
          bean, I was calling a find method, and I was capturing the exception, and in
          case theres an exception, assuming that there is no record in the database,
          I create a new record. This find method is in the same session bean,
          session2 along with the create and update methods. Inititally when there was
          no record, the session bean was raising EJBException, due to which the main
          session bean, session1, rollbacks the transaction, it started, but as I was
          catching this exception, so the execution continued, .... next statement
          being create, and as the transaction attribute of it was Required, and as
          the session1 bean's transaction has already been rolled back, there was no
          transaction, so the create method started its own transaction, and created
          the record, and then the update method too did the same, but it gave an
          error, so only update method's transaction got rolled back.
          So I changed the find method to throw FinderException, instead of
          EJBException, so the transaction of sessio1 bean is not lost.
          Its working now.
          But the other problem I posted, where I dont want to throw any exception to
          the client calling the session1 bean, I still havent figured it out, how to
          stop it, although am catching all the exceptions, still the client got
          exception.
          Thanks
          Amit Chauhan
          eTouch System
          510-795-4800 ext 113
          Amit <[email protected]> wrote in message
          news:[email protected]...
          > Hi,
          > I've got another question on transaction.
          > I have following stateless session beans :
          > session1 with trans-attribute Required.
          > session2 with trans-attribute Required.
          >
          > session1 calls session2 and session3.
          >
          > session2 inserts/updates records in the database.
          >
          > What am doing is first I call a createSchedule method in session2, which
          > creates a new record in the database.
          > And then I call an update method on the session2 bean, that will fetch and
          > update the newly created record.
          >
          > This second update fails, due to some database constraints.
          > What I was hoping, that the record should not be created in the database,
          > but it did.
          > The first method call in session2 succeeded and the second failed !!
          >
          > Doesnt both the DML be part of one transaction ?
          >
          > Thanks
          > --
          > Amit
          >
          >
          >

Need help with duplicate print jobs over network that I can't cancel

I have the Photosmart Premium All-in-One on my home network. My kids who each have laptop running Windows 7 and are connected via wireless to the printer via a DLINK DIR-655.
They hit the print button too many times and it keeps printing over and over again.
Is there a way to get the printer to stop printing these duplicates. I tried turning off/on but they just keep printing.
We're wasting paper/ink and I need help with a solution.
Please let me know. Thanks.
Angelo

There should be a button with a red 'X' on it on the front of the printer. This is the print cancel button.
Say thanks by clicking "Kudos" "thumbs up" in the post that helped you.
I am employed by HP

Error when Calling Session Bean from BPEL .

Please Help ? Has anyone experienced this before
Oracle BPEL Process Manager Full Cycle
An unexpected error has occurred while executing your request. This is most likely related to a defect in the Oracle BPEL Process Manager product. We apologize you can post the error to the OTN forum and we will get back to you as soon as possible.
Attachments:
Build Information:
Oracle BPEL Server version 10.1.2.0.0
Build: 1545
Build time: Sun Jun 26 02:17:28 PDT 2005
Build type: release
Source tag: BPELPM_10_1_2_release_branch
Exception Message:
[java.lang.Exception]
Failed to create "ejb/collaxa/system/ServerBean" bean; exception reported is: "javax.naming.NameNotFoundException: ejb/collaxa/system/ServerBean not found
     at com.evermind.server.rmi.RMIContext.lookup(RMIContext.java:164)
     at com.evermind.server.ApplicationContext.lookup(ApplicationContext.java:333)
     at com.evermind.server.ApplicationContext.lookup(ApplicationContext.java:120)
     at javax.naming.InitialContext.lookup(InitialContext.java:347)
     at com.oracle.bpel.client.util.BeanRegistry.lookupServerBean(BeanRegistry.java:95)
     at com.oracle.bpel.client.Server.getServerBean(Server.java:463)
     at com.oracle.bpel.client.Server.isDomainListingEnabled(Server.java:419)
     at _displayInstance._jspService(_displayInstance.java:78)
     at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)
     at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:347)
     at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:509)
     at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:413)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:810)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:322)
     at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:220)
     at com.collaxa.cube.fe.DomainFilter.doFilter(DomainFilter.java:152)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:649)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:322)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:790)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:208)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:125)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
     at java.lang.Thread.run(Thread.java:534)
Exception Trace:
java.lang.Exception: Failed to create "ejb/collaxa/system/ServerBean" bean; exception reported is: "javax.naming.NameNotFoundException: ejb/collaxa/system/ServerBean not found
     at com.evermind.server.rmi.RMIContext.lookup(RMIContext.java:164)
     at com.evermind.server.ApplicationContext.lookup(ApplicationContext.java:333)
     at com.evermind.server.ApplicationContext.lookup(ApplicationContext.java:120)
     at javax.naming.InitialContext.lookup(InitialContext.java:347)
     at com.oracle.bpel.client.util.BeanRegistry.lookupServerBean(BeanRegistry.java:95)
     at com.oracle.bpel.client.Server.getServerBean(Server.java:463)
     at com.oracle.bpel.client.Server.isDomainListingEnabled(Server.java:419)
     at _displayInstance._jspService(_displayInstance.java:78)
     at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)
     at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:347)
     at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:509)
     at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:413)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:810)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:322)
     at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:220)
     at com.collaxa.cube.fe.DomainFilter.doFilter(DomainFilter.java:152)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:649)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:322)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:790)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:208)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:125)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
     at java.lang.Thread.run(Thread.java:534)
     at com.oracle.bpel.client.util.BeanRegistry.lookupServerBean(BeanRegistry.java:109)
     at com.oracle.bpel.client.Server.getServerBean(Server.java:463)
     at com.oracle.bpel.client.Server.isDomainListingEnabled(Server.java:419)
     at displayInstance.jspService(_displayInstance.java:78)
     at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)
     at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:347)
     at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:509)
     at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:413)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:810)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:322)
     at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:220)
     at com.collaxa.cube.fe.DomainFilter.doFilter(DomainFilter.java:152)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:649)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:322)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:790)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:208)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:125)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
     at java.lang.Thread.run(Thread.java:534)

The build you are using is one of our nightly build.
You should try it by using BPEL PM offical release build.
-John

Problem Calling Remote Session Bean Method

Need help. I am trying to call a method in a remote stateless session bean in an EJB in my web application from a stateless session bean in a different EJB in the web application. I am getting a run-time error that says,
"java.lang.NoClassDefFoundError: dtpitb.common.sb.reports.CommonReportsHome"
ref = ctx.lookup( jndiName );
// Cast to Local Home Interface using RMI-IIOP
commonReportsHome = (CommonReportsHome)
PortableRemoteObject.narrow(ref, CommonReportsHome.class);
If while in a session bean of an EJB, I want to call a public method in the session bean of a totally different EJB, is there something in particular I am missing. I can make the call from the web application code. I can make a remote call from this session bean to itself in the exact same fashion. I just can't call a session bean in another EJB. All thoughts are welcome.
Thanks,
Pete

Thanks for replying. That could very well be the case I suppose. I'm using JBuilder and WebLogic, and JBuilder pretty much does all of the deployment descriptor code for me. However, maybe this is something I need to incorporate manually.
One EJB is in the same project as the web application code. The other EJB (common_ejb) is in another project. The calling session bean is in the project with the web app, and the remote session bean method that I'm targeting is in the common EJB session bean. Both EJBs are included in the web app's WEB-INF\lib dir and in the war file.
So theoretically, this isn't an unconventional practice I assume?
Thanks,
Pete

Stateless Session Bean + EJB Question + Jboss

Hello,
If I have a stateless session bean on a linux machine and it works locally what do i need to do to access a method in the session bean from a remote windows machine.
I would like to be able to execute my client jar file on a windows machine and have it access the jboss server on the linux machine. what do i need to do?
i have the session bean working locally on both windows and linux machine. do i need to to have a JSP/Servlet to access the session bean? can the session bean not be accessed directly? what should my classpath look like? do I need to include extra jar files in my client jar file.?
Thanks,
Joyce

Thanks guys for the help but I am still a little lost.
My Client windows machine has the client jar file and all the other jar files. This is my client class
package helloworld.client;
import javax.naming.Context;
import javax.naming.InitialContext;
import java.util.Hashtable;
import java.util.Properties;
import helloworld.interfaces.HelloWorldHome;
import helloworld.interfaces.HelloWorld;
public class HelloClient
     public static void main(String[] args)
          Hashtable prop = new Hashtable();
          prop.put ("java.naming.factory.url.pkgs","org.jboss.naming:org.jnp.interfaces");
          prop.put ("java.naming.provider.url","jnp://172.16.220.160:1099");
          prop.put ("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
          try
               Context ctx = new InitialContext(prop);
               Object obj = ctx.lookup("ejb/helloworld/HelloWorld");
               System.out.println(obj);
               HelloWorldHome home = (HelloWorldHome)javax.rmi.PortableRemoteObject.narrow(obj, HelloWorldHome.class);
               HelloWorld helloWorld = home.create();
               String str = helloWorld.sayHelloEJB("JOYCE is COOL");
               System.out.println(str);
               helloWorld.remove();
          catch(Exception e)
               e.printStackTrace();
I get a NullPointer ie the home object is null. The IP address is the IP of the Linux machine that has Jboss running on.
Questions are:
1. Do I need to have Tomcat running on my client machine if I am to connect via HTTP? Does this alter my client code.?
2. My JNDI lookup is what is causing the problem. Does my jboss.xml and my ejb-jar.jar look okay to you.
jboss.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jboss PUBLIC "-//JBoss//DTD JBOSS//EN" "http://www.jboss.org/j2ee/dtd/jboss.dtd">
<jboss>
<enterprise-beans>
<session>
<ejb-name>helloworld/HelloWorld</ejb-name>
<jndi-name>ejb/helloworld/HelloWorld</jndi-name>
</session>
</enterprise-beans>
<resource-managers>
</resource-managers>
</jboss>
ejb-jar.jar
<?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 >
<description>No Description.</description>
<display-name>Generated by XDoclet</display-name>
<enterprise-beans>

<session >
<description><![CDATA[No Description.]]></description>
<ejb-name>helloworld/HelloWorld</ejb-name>
<home>helloworld.interfaces.HelloWorldHome</home>
<remote>helloworld.interfaces.HelloWorld</remote>
<ejb-class>helloworld.session.HelloWorldBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Bean</transaction-type>
</session>





</enterprise-beans>


<assembly-descriptor >



</assembly-descriptor>
</ejb-jar>
Do I need RMI ? Do I need to concern myself with CORBA? All Im looking for is a step by step to understanding what I need to configure? Is their some way I can debug?
Thanks alot,
Joyce

HttpSession vs. Stateful Session Bean ---- when State Session is large

I hope most of the people come across with this issue where to put the state
for the internet/intranet based applications when they are using
servlet/jsps calling session beans. Weblogic 4.5.1 does support httpsession
in-memory replication for the servlets but the stateful session beans are
not replicated in clustered environment. Plus with stateful bean u get
activation/passivation overhead too. So one tempts to use stateless session
beans and store state in httpsession?
Then what is the upper limit for the session state one can put in
HttpSession with the weblogic? Is there any way to configure it?
One way to overcome the httpsession size limitation is to use database for
storing state and just store some unique Ids for the session info in
httpSession. But then there will be overhead for database connection?(jdbc
connection pool can provide some help here). So what is the recommended way
for doing this provided few thousand concurrent clients with session size
say exceeding 4kb per client?
Thanks
Usmani

There are no special setting in sun-ejb-jar.xml regarding cache settings. The default settings from server.xml are used:
    <jdbc-connection-pool steady-pool-size="8" max-pool-size="32" max-wait-time-in-millis="60000" pool-resize-quantity="2" idle-timeout-in-seconds="300" is-isolation-level-guaranteed="false" is-connection-validation-required="false" connection-validation-method="auto-commit" fail-all-connections="false" datasource-classname="oracle.jdbc.pool.OracleDataSource" name="ebs">
      <property value="jdbc:oracle:thin:@myebsdbsserver:1521:ebsdevdb" name="url"/>
      <property value="ebs" name="user"/>
      <property value="ebs" name="password"/>
    </jdbc-connection-pool>
<ejb-container steady-pool-size="32" pool-resize-quantity="16" max-pool-size="64" cache-resize-quantity="32" max-cache-size="512" pool-idle-timeout-in-seconds="600" cache-idle-timeout-in-seconds="600" removal-timeout-in-seconds="5400" victim-selection-policy="nru" commit-option="B" monitoring-enabled="true">
     </ejb-container>The Session Bean uses Container Managed Transaction. Is it possible in this case, that the bean isn't 'idle enough' in order to set into passivated?

Help requested: call session bean over network

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