Enterprise Session Bean Problem

Dear Experts,
I have just installed Netweaver Developer Studio 7.1 Composition Environment and is doing some development on it from the tutorial in the following link
[http://help.sap.com/saphelp_nw04/helpdata/en/c3/679564e11d482f8a706b423f67e56c/content.htm|http://help.sap.com/saphelp_nw04/helpdata/en/c3/679564e11d482f8a706b423f67e56c/content.htm]
I have created a new EJB Project using the Configuration SAP EJB J2EE 1.4 Project and created a new stateless session bean Calculator.
I finished creating the session bean with all the BUSINESS METHODS, but when I expand the project node Calculator in the J2EE Explorer, I CANNOT see the Calculator.java class. All other classes such as CalculatorBean.java, CalculatorHome.java, etc are present.
This is where the problem comes, when I create the JavaBean in the Web Module I will need to access the Calculator.java class and now I cannot access it since it is missing.
Can you please guide me on how to generate the Calculator.java class in the session bean.
Points will be rewarded for correct answers.
Thanks in advance
Edited by: jamison2004 jordan2004 on May 7, 2008 11:16 AM
Edited by: jamison2004 jordan2004 on May 7, 2008 11:25 AM

Hi jamison jordan,
Maybe you check the CE version of the documentation:
[Creating Your First J2EE Application|http://help.sap.com/saphelp_nwce10/helpdata/en/c3/679564e11d482f8a706b423f67e56c/frameset.htm]
kind regards
Stefanie

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Thanks.
customer_list.java
package soulsurfing.admin;
import com.sun.rave.web.ui.appbase.AbstractPageBean;
import com.sun.rave.web.ui.component.Body;
import com.sun.rave.web.ui.component.Form;
import com.sun.rave.web.ui.component.Head;
import com.sun.rave.web.ui.component.Html;
import com.sun.rave.web.ui.component.Link;
import com.sun.rave.web.ui.component.Page;
import javax.faces.FacesException;
import com.sun.rave.web.ui.component.TextField;
import com.sun.rave.web.ui.component.Button;
import com.sun.rave.web.ui.component.PageSeparator;
import com.sun.rave.web.ui.component.StaticText;
import com.sun.rave.web.ui.component.Table;
import com.sun.rave.web.ui.component.TableRowGroup;
import com.sun.rave.web.ui.component.TableColumn;
import com.sun.data.provider.impl.CachedRowSetDataProvider;
import com.sun.rave.web.ui.component.MessageGroup;
import com.sun.rave.web.ui.model.DefaultTableDataProvider;
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    public Head getHead1() {
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    public void setHead1(Head h) {
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    public Link getLink1() {
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    public void setLink1(Link l) {
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    public Body getBody1() {
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    public void setForm1(Form f) {
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    public void setTextField1(TextField tf) {
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        return (adminSessionBean)getBean("admin$adminSessionBean");
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        return (soulsurfing.ApplicationBean1)getBean("ApplicationBean1");
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        return (soulsurfing.SessionBean1)getBean("SessionBean1");
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        super.init();
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        } catch (Exception e) {
            log("customer_list Initialization Failure", e);
            throw e instanceof FacesException ? (FacesException) e: new FacesException(e);
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adminSessionBean.java
package soulsurfing.admin;
import com.sun.rave.web.ui.appbase.AbstractSessionBean;
import javax.faces.FacesException;
import com.sun.sql.rowset.CachedRowSetXImpl;
public class adminSessionBean extends AbstractSessionBean {
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            throw e instanceof FacesException ? (FacesException) e: new FacesException(e);
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    public int getRowCount() {
        return this.rowCount;
    public void setRowCount(int rowCount) {
        this.rowCount = rowCount;
    private String msg;
    public String getMsg() {
        return this.msg;
    public void setMsg(String msg) {
        this.msg = msg;
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Odd marshalling problems with EJB 3.0 stateless session bean

Hello,
I began encountering marshalling exceptions when invoking methods on a previously functionining facade bean. The problem seems to be almost arbitrary, in that certain packages receive marshalling exceptions, while others do not (my main client started failing, but then I realized that a simple test class was still working, along with oddly JSFs that invoke that main client, which fails outside of that scope). Is there some config issue with stateless session beans (in 3.0) that I might be missing? There are no duplicate versions of these class; they have not been modified; they've been compiled with the current IDE. Any help would be appreciated. Thanks.
full stack trace:
com.evermind.reflect.UndeclaredExceptionTypeException: oracle.oc4j.rmi.OracleRemoteException
 at __Proxy1.findAllViewRight(Unknown Source)
 at com.jwt.gui.menus.beans.ViewRightBean.<init>(ViewRightBean.java:34)
 at com.jwt.gui.menus.beans.ViewRightBean.main(ViewRightBean.java:63)
oracle.oc4j.rmi.OracleRemoteException: Invocation error: java.rmi.UnmarshalException: Error deserializing return-value: java.io.InvalidClassException: com.jwt.gui.menus.persistence.ViewRight; local class incompatible: stream classdesc serialVersionUID = 2365320765203750319, local class serialVersionUID = -8750611773395720631
 at com.evermind.server.rmi.RMICall.throwRecordedException(RMICall.java:142)
 at com.evermind.server.rmi.RMIClientConnection.obtainRemoteMethodResponse(RMIClientConnection.java:472)
 at com.evermind.server.rmi.RMIClientConnection.invokeMethod(RMIClientConnection.java:416)
 at com.evermind.server.rmi.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:63)
 at com.evermind.server.rmi.RecoverableRemoteInvocationHandler.invoke(RecoverableRemoteInvocationHandler.java:28)
 at com.evermind.server.ejb.StatelessSessionRemoteInvocationHandler.invoke(StatelessSessionRemoteInvocationHandler.java:43)
 at __Proxy1.findAllViewRight(Unknown Source)
 at com.jwt.gui.menus.beans.ViewRightBean.<init>(ViewRightBean.java:34)
 at com.jwt.gui.menus.beans.ViewRightBean.main(ViewRightBean.java:63)
 Nested exception is:
java.rmi.UnmarshalException: Error deserializing return-value: java.io.InvalidClassException: com.jwt.gui.menus.persistence.ViewRight; local class incompatible: stream classdesc serialVersionUID = 2365320765203750319, local class serialVersionUID = -8750611773395720631
 at com.evermind.server.rmi.RMICall.EXCEPTION_ORIGINATES_FROM_THE_REMOTE_SERVER(RMICall.java:109)
 at com.evermind.server.rmi.RMICall.throwRecordedException(RMICall.java:128)
 at com.evermind.server.rmi.RMIClientConnection.obtainRemoteMethodResponse(RMIClientConnection.java:472)
 at com.evermind.server.rmi.RMIClientConnection.invokeMethod(RMIClientConnection.java:416)
 at com.evermind.server.rmi.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:63)
 at com.evermind.server.rmi.RecoverableRemoteInvocationHandler.invoke(RecoverableRemoteInvocationHandler.java:28)
 at com.evermind.server.ejb.StatelessSessionRemoteInvocationHandler.invoke(StatelessSessionRemoteInvocationHandler.java:43)
 at __Proxy1.findAllViewRight(Unknown Source)
 at com.jwt.gui.menus.beans.ViewRightBean.<init>(ViewRightBean.java:34)
 at com.jwt.gui.menus.beans.ViewRightBean.main(ViewRightBean.java:63)
oracle.oc4j.rmi.OracleRemoteException: Invocation error: java.rmi.UnmarshalException: Error deserializing return-value: java.io.InvalidClassException: com.jwt.gui.menus.persistence.ViewRight; local class incompatible: stream classdesc serialVersionUID = 2365320765203750319, local class serialVersionUID = -8750611773395720631
 at com.evermind.server.rmi.RMICall.throwRecordedException(RMICall.java:142)
 at com.evermind.server.rmi.RMIClientConnection.obtainRemoteMethodResponse(RMIClientConnection.java:472)
 at com.evermind.server.rmi.RMIClientConnection.invokeMethod(RMIClientConnection.java:416)
 at com.evermind.server.rmi.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:63)
 at com.evermind.server.rmi.RecoverableRemoteInvocationHandler.invoke(RecoverableRemoteInvocationHandler.java:28)
 at com.evermind.server.ejb.StatelessSessionRemoteInvocationHandler.invoke(StatelessSessionRemoteInvocationHandler.java:43)
 at __Proxy1.findAllViewRight(Unknown Source)
 at com.jwt.gui.menus.beans.ViewRightBean.<init>(ViewRightBean.java:34)
 at com.jwt.gui.menus.beans.ViewRightBean.main(ViewRightBean.java:63)
 Nested exception is:
java.rmi.UnmarshalException: Error deserializing return-value: java.io.InvalidClassException: com.jwt.gui.menus.persistence.ViewRight; local class incompatible: stream classdesc serialVersionUID = 2365320765203750319, local class serialVersionUID = -8750611773395720631
 at com.evermind.server.rmi.RMICall.EXCEPTION_ORIGINATES_FROM_THE_REMOTE_SERVER(RMICall.java:109)
 at com.evermind.server.rmi.RMICall.throwRecordedException(RMICall.java:128)
 at com.evermind.server.rmi.RMIClientConnection.obtainRemoteMethodResponse(RMIClientConnection.java:472)
 at com.evermind.server.rmi.RMIClientConnection.invokeMethod(RMIClientConnection.java:416)
 at com.evermind.server.rmi.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:63)
 at com.evermind.server.rmi.RecoverableRemoteInvocationHandler.invoke(RecoverableRemoteInvocationHandler.java:28)
 at com.evermind.server.ejb.StatelessSessionRemoteInvocationHandler.invoke(StatelessSessionRemoteInvocationHandler.java:43)
 at __Proxy1.findAllViewRight(Unknown Source)
 at com.jwt.gui.menus.beans.ViewRightBean.<init>(ViewRightBean.java:34)
 at com.jwt.gui.menus.beans.ViewRightBean.main(ViewRightBean.java:63)

Hello,
I began encountering marshalling exceptions when invoking methods on a previously functionining facade bean. The problem seems to be almost arbitrary, in that certain packages receive marshalling exceptions, while others do not (my main client started failing, but then I realized that a simple test class was still working, along with oddly JSFs that invoke that main client, which fails outside of that scope). Is there some config issue with stateless session beans (in 3.0) that I might be missing? There are no duplicate versions of these class; they have not been modified; they've been compiled with the current IDE. Any help would be appreciated. Thanks.
full stack trace:
com.evermind.reflect.UndeclaredExceptionTypeException: oracle.oc4j.rmi.OracleRemoteException
 at __Proxy1.findAllViewRight(Unknown Source)
 at com.jwt.gui.menus.beans.ViewRightBean.<init>(ViewRightBean.java:34)
 at com.jwt.gui.menus.beans.ViewRightBean.main(ViewRightBean.java:63)
oracle.oc4j.rmi.OracleRemoteException: Invocation error: java.rmi.UnmarshalException: Error deserializing return-value: java.io.InvalidClassException: com.jwt.gui.menus.persistence.ViewRight; local class incompatible: stream classdesc serialVersionUID = 2365320765203750319, local class serialVersionUID = -8750611773395720631
 at com.evermind.server.rmi.RMICall.throwRecordedException(RMICall.java:142)
 at com.evermind.server.rmi.RMIClientConnection.obtainRemoteMethodResponse(RMIClientConnection.java:472)
 at com.evermind.server.rmi.RMIClientConnection.invokeMethod(RMIClientConnection.java:416)
 at com.evermind.server.rmi.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:63)
 at com.evermind.server.rmi.RecoverableRemoteInvocationHandler.invoke(RecoverableRemoteInvocationHandler.java:28)
 at com.evermind.server.ejb.StatelessSessionRemoteInvocationHandler.invoke(StatelessSessionRemoteInvocationHandler.java:43)
 at __Proxy1.findAllViewRight(Unknown Source)
 at com.jwt.gui.menus.beans.ViewRightBean.<init>(ViewRightBean.java:34)
 at com.jwt.gui.menus.beans.ViewRightBean.main(ViewRightBean.java:63)
 Nested exception is:
java.rmi.UnmarshalException: Error deserializing return-value: java.io.InvalidClassException: com.jwt.gui.menus.persistence.ViewRight; local class incompatible: stream classdesc serialVersionUID = 2365320765203750319, local class serialVersionUID = -8750611773395720631
 at com.evermind.server.rmi.RMICall.EXCEPTION_ORIGINATES_FROM_THE_REMOTE_SERVER(RMICall.java:109)
 at com.evermind.server.rmi.RMICall.throwRecordedException(RMICall.java:128)
 at com.evermind.server.rmi.RMIClientConnection.obtainRemoteMethodResponse(RMIClientConnection.java:472)
 at com.evermind.server.rmi.RMIClientConnection.invokeMethod(RMIClientConnection.java:416)
 at com.evermind.server.rmi.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:63)
 at com.evermind.server.rmi.RecoverableRemoteInvocationHandler.invoke(RecoverableRemoteInvocationHandler.java:28)
 at com.evermind.server.ejb.StatelessSessionRemoteInvocationHandler.invoke(StatelessSessionRemoteInvocationHandler.java:43)
 at __Proxy1.findAllViewRight(Unknown Source)
 at com.jwt.gui.menus.beans.ViewRightBean.<init>(ViewRightBean.java:34)
 at com.jwt.gui.menus.beans.ViewRightBean.main(ViewRightBean.java:63)
oracle.oc4j.rmi.OracleRemoteException: Invocation error: java.rmi.UnmarshalException: Error deserializing return-value: java.io.InvalidClassException: com.jwt.gui.menus.persistence.ViewRight; local class incompatible: stream classdesc serialVersionUID = 2365320765203750319, local class serialVersionUID = -8750611773395720631
 at com.evermind.server.rmi.RMICall.throwRecordedException(RMICall.java:142)
 at com.evermind.server.rmi.RMIClientConnection.obtainRemoteMethodResponse(RMIClientConnection.java:472)
 at com.evermind.server.rmi.RMIClientConnection.invokeMethod(RMIClientConnection.java:416)
 at com.evermind.server.rmi.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:63)
 at com.evermind.server.rmi.RecoverableRemoteInvocationHandler.invoke(RecoverableRemoteInvocationHandler.java:28)
 at com.evermind.server.ejb.StatelessSessionRemoteInvocationHandler.invoke(StatelessSessionRemoteInvocationHandler.java:43)
 at __Proxy1.findAllViewRight(Unknown Source)
 at com.jwt.gui.menus.beans.ViewRightBean.<init>(ViewRightBean.java:34)
 at com.jwt.gui.menus.beans.ViewRightBean.main(ViewRightBean.java:63)
 Nested exception is:
java.rmi.UnmarshalException: Error deserializing return-value: java.io.InvalidClassException: com.jwt.gui.menus.persistence.ViewRight; local class incompatible: stream classdesc serialVersionUID = 2365320765203750319, local class serialVersionUID = -8750611773395720631
 at com.evermind.server.rmi.RMICall.EXCEPTION_ORIGINATES_FROM_THE_REMOTE_SERVER(RMICall.java:109)
 at com.evermind.server.rmi.RMICall.throwRecordedException(RMICall.java:128)
 at com.evermind.server.rmi.RMIClientConnection.obtainRemoteMethodResponse(RMIClientConnection.java:472)
 at com.evermind.server.rmi.RMIClientConnection.invokeMethod(RMIClientConnection.java:416)
 at com.evermind.server.rmi.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:63)
 at com.evermind.server.rmi.RecoverableRemoteInvocationHandler.invoke(RecoverableRemoteInvocationHandler.java:28)
 at com.evermind.server.ejb.StatelessSessionRemoteInvocationHandler.invoke(StatelessSessionRemoteInvocationHandler.java:43)
 at __Proxy1.findAllViewRight(Unknown Source)
 at com.jwt.gui.menus.beans.ViewRightBean.<init>(ViewRightBean.java:34)
 at com.jwt.gui.menus.beans.ViewRightBean.main(ViewRightBean.java:63)

Problem Deploying EJB3 Stateless session bean in Jboss4.0.3

Hi All,
I have developed an EJB 3 Stateless session bean and tried to deploy in JBoss 4.0.3 , But i get the following Exception.
javax.naming.NameNotFoundException: ejb not bound
at org.jnp.server.NamingServer.getBinding(NamingServer.java:491)
at org.jnp.server.NamingServer.getBinding(NamingServer.java:499)
at org.jnp.server.NamingServer.getObject(NamingServer.java:505)
at org.jnp.server.NamingServer.lookup(NamingServer.java:249)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:610)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at org.apache.jsp.session_jsp._jspService(org.apache.jsp.session_jsp:69)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:157)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
at java.lang.Thread.run(Thread.java:595)
I am sorry if the question is silly..... My Remote Interface will be one like this
import javax.ejb.Remote;
@Remote
public interface CityService {
public String getCity();
And My Bean Class will be
import javax.ejb.EJB;
import javax.ejb.Remote;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.EntityTransaction;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
@EJB
@Remote(CityService.class)
@Stateless(mappedName="ejb/CityService")
public class CityServiceBean implements CityService {
public String getCity(){
return "Chennai Metropolitan";
And the client which invokes the bean will be
InitialContext ctx = new InitialContext();
CityService c = (CityService)ctx.lookup("ejb/CityService");
System.out.println("Msg from Bean"+c.getCity());
please help me out of this issue....
Thanks in advance

ford wrote:
If you deploy your application in a .ear, you also can use this:
You have to set a name to your EJBBean -> @Stateless(name = "XXX")
The client for remote interface -> cxt.lookup(Name_of_your_own_ear_without_extension + "/XXX/Remote");
The client for local interface -> cxt.lookup(Name_of_your_own_ear_without_extension + "/XXX/Local");the problem with this approach is that if you version your ears, the version numbers show up in the jndi names, and your client code will be hard coded to specific server versions.

Problem While calling a session bean (J2EE)

Hi!!
Please see my client-side code..where I am calling a session bean (J2EE Server)
It's correct or not?????
InitialContext ctx = new InitialContext();
Object objref = ctx.lookup("SecDbSecRoleJndi");
SecBusSecRoleHome home =(SecBusSecRoleHome)PortableRemoteObject.narrow(objref,SecBusSecRoleHome.class);
SecBusSecRoleRemote remote =(SecBusSecRoleRemote)PortableRemoteObject.narrow(home.create(),SecBusSecRoleRemote.class);
Here I am getting the error at 3rd line
java.lang.ClassCastException
at com.sun.corba.se.internal.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:296)
at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:137)
at TestServlet.init(TestServlet.java:22)
Please do the favor to me..reply me back.
Bhumika

Hello,
Hope you are bale to sole the problem by this time. Iam using the follwing code and its working fine for me. i'm using the weblogic application server.
<%@ page import="javax.naming.*, java.rmi.*, javax.ejb.*, java.util.*,java.rmi.server.*,java.net.*,javax.rmi.PortableRemoteObject,com.hmp.webcasting.services.ejb.*"%>
<%
try{
Properties prop = new Properties();
prop.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
 System.out.println("Hello......3333333333Test");
 prop.put(Context.PROVIDER_URL, "t3://pani:7001");
 InitialContext ctx = new InitialContext(prop);
Object home = ctx.lookup("personMgr");
 KeywordsMgrHome roleHome = (KeywordsMgrHome) javax.rmi.PortableRemoteObject.narrow(home, KeywordsMgrHome.class);
 KeywordsMgr kmgr=roleHome.create();
 //KeywordsMgrHome roleHome = (KeywordsMgrHome) ctx.lookup("personMgr");;
 System.out.println(roleHome);
 System.out.println(kmgr);
 }catch(Exception e){
 e.printStackTrace();
 %>
Try using this.
Genrally calss cast exception occurs if you are using classes out of a shared library directory instead of within the webapp, or if you are somehow maintaining references to object instances created with the old class and trying to use them after the reload. So try to delete the old file files and deploy the bean once again . Hope this may help you. Anyway if you can give the full code i will check by deploying it.([email protected])

Problems accessing fields in a CMP entity bean from a session bean

Hello everybody,
I'm getting the next problem: when I try to access a field in a CMP entity bean that I have instantiated from a session bean (trhoug entitybean.getNameOfField), I get the error "the entity bean does not exist in the database".
This entity bean is accessing a table in an external database (not the DB of the WAS), but I know that it's getting the correct data from the table, since I check the entitybean.size() and the entitybean.findByPrimaryKey(), and I get the right information. For some reason, the only thing that it doesn't work in the entity bean are the getter/setter methods (I created them automatically after having created the entity fields).
I access the entity bean through its local interface...
I know it's really difficult to give an answer with so few details, but... does anybody think I forgot something important to configure??
Thank very much in advance!!
Isidro

getter and setter methods for cmp-fields are abstract.
getter and setter methods for cmr-fields are abstract.
"John Lee" <[email protected]> wrote:
>
Hi:
Which method in a CMP Entity bean should be abstract? just only SetXXX
and
GetXXX?
Thanks!
John Lee

Problem while invoking a Stateless Session bean from another bean

Hi,
I have a peculiar problem while coding with Stateless Session beans. Maybe you guys can help me out over here. The scenario is as follows
There are 3 Stateless Session beans. Let Us say Bean A, B and C. There are three methods, method1, method2, and method3 inside A, B and C respectively.
From A.method1(), B.method2(), and C.method3() are being invoked sequentially. Each of these methods does some JDBC operation and then returns.
The problem is this, if C.method3() throws and exception, then I am unable to rollback the changes made by B.method2(). Those changes get "Committed" to the database.
All the 3 beans have Bean managed persistence property set. I am using WebSphere 6.1.
Any insight on why this is happening would be greatly appreciated.
Thanks In Advance
Amardeep Verma

Hi,
This is a matter of calling all three methods in the same transaction context. Most easy way of doing this is having a 4th session bean containing a method calling the other 3. Make sure that the Transaction Attributes are REQUIRED, which is the default.
If the calls a to different backends/databases, you need global transactions and therefor XA complient database and drivers.
HTH Robert

Problem invoking gogle web service from session bean

Hello
I have developed a Web-Client which consumes the google-WebService with Apache Axis. I have generated the corresponding classes with WSDL2Java and the client works without problems. A little code fragment from my client:
GoogleSearchService service = new GoogleSearchServiceLocator();
          // Now use the service to get a stub to the Service Definition Interface (SDI)
          GoogleSearchPort google = service.getGoogleSearchPort();
         GoogleSearchResult googleSearchResult = google.doGoogleSearch(GOOGLE_KEY, // java.lang.String key
                       q.toString(), //java.lang.String q
                       0, // int start
                       10, // int maxResults
                       false, //boolean filter
                       "", // java.lang.String restrict
                       false, //boolean safeSearch
                       "lang_ja|lang_en", // java.lang.String lr
                       "UTF-8", // java.lang.String ie
                       "UTF-8"); // java.lang.String oeNow I have to put the Web-Client in a SessionBean. Therfore I defined the code of the web-client in a method and put it into a stateless session bean and wrote a client for the session bean. But when the session bean invokes the corresponding method for consuming the google web service, there always occurs the following error:
[java] Exception in thread "main" java.rmi.ServerError: Unexpected Error; nested exception is:
[java] java.lang.NoClassDefFoundError: GoogleSearch/GoogleSearchService
But I have definitely all necessary classes in my classpath, like GoogleSearchService, etc. So all necessary classes are available. And the code to conume the web service als works because as said I tested it with a web-client.
Has anybody an idea what went wrong here? Is there anything important when I a web service is invoked by a session bean??:(
regards
pat

Has nobdy an idea?? :(( I tried for such a long time but I was not able to fix this problem....:(
Please help...

A simple problem with sateful Session beans

Hi,
I have a really novice problem with stateful session bean in Java EE 5.
I have written a simple session bean which has a counter inside it and every time a client call this bean it must increment the count value and return it back.
I have also created a simple servlet to call this session bean.
Everything seemed fine I opened a firefox window and tried to load the page, the counter incremented from 1 to 3 for the 3 times that I reloaded the page then I opened an IE window (which I think is actually a new client) but the page counter started from 4 not 1 for the new client and it means that the new client has access to the old client session bean.
Am I missing anything here???
Isn�t it the way that a stateful session bean must react?
This is my stateful session bean source.
package test;
import javax.ejb.Stateful;
@Stateful
public class SecondSessionBean implements SecondSessionRemote
private int cnt;
/** Creates a new instance of SecondSessionBean */
public SecondSessionBean ()
cnt=1;
public int getCnt()
return cnt++;
And this is my simple client site servlet
package rezaServlets;
import java.io.*;
import java.net.*;
import javax.ejb.EJB;
import javax.servlet.*;
import javax.servlet.http.*;
import test.SecondSessionRemote;
public class main extends HttpServlet
@EJB
private SecondSessionRemote secondSessionBean;
protected void processRequest (HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
response.setContentType ("text/html;charset=UTF-8");
PrintWriter out = response.getWriter ();
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet main</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Our count is " + Integer.toString (secondSessionBean.getCnt ()) + "</h1>");
out.println("</body>");
out.println("</html>");
out.close ();
protected void doGet (HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
processRequest (request, response);
protected void doPost (HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
processRequest (request, response);
}

You are injecting a reference to a stateful session bean to an instance variable in the servlet. This bean instance is shared by all servlet request, and that's why you are seeing this odd behavior.
You can use type-leve injection for the stateful bean, and then lookup the bean inside your request-processing method. You may also save this bean ref in HttpSession.
@EJB(name="ejb/foo", beanName="SecondBean", beanInterface="com.foo.foo.SecondBeanRemote")
public MyServlet extends HttpServlet {
ic.lookup("java:comp/env/ejb/foo");
}

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