JMS Web Service Configuration

Question

Hi folks,
I'm trying to set up a JMS web service on a WebLogic 7.0 server.
I want this web service to listen for messages on a queue on
another server running WebLogic 6.1 sp2. Here's what I've done:
Created web service using WebLogic Workshop modeled after the
workshop sample SimpleJMS.jws. A file Email.jws contains the
following code snippet:
package datatel.jms.email;
import weblogic.jws.control.JwsContext;
import EmailControl;
import javax.jms.Message;
public class Email
// Public variables...
public String m_Message = "default email response";
public EmailJMS emailJMS = null;
// Protected variables...
protected String jmsURL = "http://predict.datatel-info.com:7250";
// Private variables...
private String name;
* @jws:control
private EmailControl Email_Ctrl;
/** @jws:context */
JwsContext context;
* Initialize the JMS connection to the predict server...
public Email()
System.out.println("\nEntering Email.jws constructor...");
// Initialize JMS on the Predict server...
emailJMS = new EmailJMS(jmsURL);
System.out.println("Exiting Email.jws constructor...");
Notice that the Email() constructor code above references my object EmailJMS(jmsURL).
This object intializes the JMS connection to the other WebLogic 6.1 server. Here's
the JMS initialization code in my web service:
public EmailJMS(String jmsURL) {
System.out.println("\nEntering EmailJMS constructor with URL..."
+ jmsURL);
Environment environ = new Environment();
environ.setProviderUrl(jmsURL);
try {
ctx = environ.getInitialContext();
System.out.println("Got new InitialContext..." + ctx.PROVIDER_URL
+ "\nTime is: " + new Date().toString());
qconFactory = (QueueConnectionFactory) ctx.lookup(JMS_FACTORY);
qcon = qconFactory.createQueueConnection();
qsession = (WLQueueSession) qcon.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
/** USER receive queue and listener
queue = (Queue) ctx.lookup("USER_TX_Q");
user_recvr = qsession.createReceiver(queue);
user_recvr.setMessageListener(this);
textMsg = qsession.createTextMessage();
objMsg = qsession.createObjectMessage();
isConnected = true;
qcon.start();
// --- more code follows ...
The JMS connection is successfully made. When another JMS program sends a message
to the USER_TX_Q, the web service receives the message via the onMessage handler
in the EmailJMS class.
The problem arises when I try to invoke my web service from the WebLogic Workshop
browser Test Form. On invocation on my web service, the following exception occurs:
start
= 0.45-->
name = Harmon .CONVPHASE = .START .CONVERSATIONID = 1023816206621
Exception
Submitted at Tue Jun 11 10:23:28 MST 2002
start
= 0.45-->
javax.ejb.CreateException: Exception on Create: java.io.NotSerializableException:
weblogic.jndi.internal.ServerNamingNode_WLStub at weblogic.knex.bean.WebProcessBean.ejbCreate(WebProcessBean.java:876)
at weblogic.knex.bean.WebProcessBean_dp0iqg_Impl.ejbCreate(WebProcessBean_dp0iqg_Impl.java:172)
at java.lang.reflect.Method.invoke(Native Method) at weblogic.ejb20.manager.ExclusiveEntityManager.create(ExclusiveEntityManager.java:731)
at weblogic.ejb20.manager.ExclusiveEntityManager.remoteCreate(ExclusiveEntityManager.java:702)
at weblogic.ejb20.internal.EntityEJBHome.create(EntityEJBHome.java:250) at
weblogic.knex.bean.WebProcessBean_dp0iqg_HomeImpl.create(WebProcessBean_dp0iqg_HomeImpl.java:74)
at weblogic.knex.bean.WebDispatcherBean.invoke(WebDispatcherBean.java:61)
at weblogic.knex.bean.RemoteDispatcherBean.invoke(RemoteDispatcherBean.java:105)
at weblogic.knex.bean.RemoteDispatcherBean_1a3xc3_EOImpl.invoke(RemoteDispatcherBean_1a3xc3_EOImpl.java:46)
at weblogic.knex.bean.RemoteDispatcherBean_1a3xc3_EOImpl_WLSkel.invoke(Unknown
Source) at weblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:159)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:262)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:229)
at weblogic.knex.bean.RemoteDispatcherBean_1a3xc3_EOImpl_WLStub.invoke(Unknown
Source) at weblogic.knex.dispatcher.Dispatcher.remoteDispatch(Dispatcher.java:96)
at weblogic.knex.dispatcher.Dispatcher.dispatch(Dispatcher.java:73) at weblogic.knex.dispatcher.HttpServer.exploreExec(HttpServer.java:464)
at weblogic.knex.dispatcher.HttpServer.doGet(HttpServer.java:370) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:945)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:332)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:242)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:5352)
at weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:718)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3032)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2466)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:152) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:133)
Service Response
When I comment out the instantiation of my EmailJMS(jmsURL) object, the web service
initializes just fine. However, I don't have the JMS connection to my other server.
What is this stack trace telling me? How do I receive unsolicited JMS messages in
a web service?
Thanks,
Bob Gontarz

Answer 1

Hi Bob,
I have tested the same functionality as mentioned by you, and could not see
any errors, while testing using the Test Form. The JMS queue where I was
sending messages is on a 6.1 sp2 server.
Please find attached the two JWS files, which I used to simulate the
condition, one used for dispatching the messages and the other for receiving
the messages.
Please do let me know if your case is any different from the one I have
tested.
I look forward to your response.
Regards,
Anurag
Workshop Support
"Bob Gontarz" <[email protected]> wrote in message
news:[email protected]...
>
Hi folks,
I'm trying to set up a JMS web service on a WebLogic 7.0 server.
I want this web service to listen for messages on a queue on
another server running WebLogic 6.1 sp2. Here's what I've done:
Created web service using WebLogic Workshop modeled after the
workshop sample SimpleJMS.jws. A file Email.jws contains the
following code snippet:
package datatel.jms.email;
import weblogic.jws.control.JwsContext;
import EmailControl;
import javax.jms.Message;
public class Email
// Public variables...
public String m_Message = "default email response";
public EmailJMS emailJMS = null;
// Protected variables...
protected String jmsURL = "http://predict.datatel-info.com:7250";
// Private variables...
private String name;
* @jws:control
private EmailControl Email_Ctrl;
/** @jws:context */
JwsContext context;
* Initialize the JMS connection to the predict server...
public Email()
System.out.println("\nEntering Email.jws constructor...");
// Initialize JMS on the Predict server...
emailJMS = new EmailJMS(jmsURL);
System.out.println("Exiting Email.jws constructor...");
Notice that the Email() constructor code above references my objectEmailJMS(jmsURL).
This object intializes the JMS connection to the other WebLogic 6.1server. Here's
the JMS initialization code in my web service:
public EmailJMS(String jmsURL) {
System.out.println("\nEntering EmailJMS constructor with URL..."
+ jmsURL);
Environment environ = new Environment();
environ.setProviderUrl(jmsURL);
try {
ctx = environ.getInitialContext();
System.out.println("Got new InitialContext..." + ctx.PROVIDER_URL
+ "\nTime is: " + new Date().toString());
qconFactory = (QueueConnectionFactory) ctx.lookup(JMS_FACTORY);
qcon = qconFactory.createQueueConnection();
qsession = (WLQueueSession) qcon.createQueueSession(false,Session.AUTO_ACKNOWLEDGE);
>
/** USER receive queue and listener
queue = (Queue) ctx.lookup("USER_TX_Q");
user_recvr = qsession.createReceiver(queue);
user_recvr.setMessageListener(this);
textMsg = qsession.createTextMessage();
objMsg = qsession.createObjectMessage();
isConnected = true;
qcon.start();
// --- more code follows ...
The JMS connection is successfully made. When another JMS program sends amessage
to the USER_TX_Q, the web service receives the message via the onMessagehandler
in the EmailJMS class.
The problem arises when I try to invoke my web service from the WebLogicWorkshop
browser Test Form. On invocation on my web service, the followingexception occurs:
>
start
= 0.45-->
name = Harmon .CONVPHASE = .START .CONVERSATIONID = 1023816206621
Exception
Submitted at Tue Jun 11 10:23:28 MST 2002
start
= 0.45-->
javax.ejb.CreateException: Exception on Create:java.io.NotSerializableException:
weblogic.jndi.internal.ServerNamingNode_WLStub atweblogic.knex.bean.WebProcessBean.ejbCreate(WebProcessBean.java:876)
atweblogic.knex.bean.WebProcessBean_dp0iqg_Impl.ejbCreate(WebProcessBean_dp0iq
g_Impl.java:172)
at java.lang.reflect.Method.invoke(Native Method) atweblogic.ejb20.manager.ExclusiveEntityManager.create(ExclusiveEntityManager.
java:731)
atweblogic.ejb20.manager.ExclusiveEntityManager.remoteCreate(ExclusiveEntityMa
nager.java:702)
atweblogic.ejb20.internal.EntityEJBHome.create(EntityEJBHome.java:250) at
>
weblogic.knex.bean.WebProcessBean_dp0iqg_HomeImpl.create(WebProcessBean_dp0i
qg_HomeImpl.java:74)
atweblogic.knex.bean.WebDispatcherBean.invoke(WebDispatcherBean.java:61)
atweblogic.knex.bean.RemoteDispatcherBean.invoke(RemoteDispatcherBean.java:105
atweblogic.knex.bean.RemoteDispatcherBean_1a3xc3_EOImpl.invoke(RemoteDispatche
rBean_1a3xc3_EOImpl.java:46)
atweblogic.knex.bean.RemoteDispatcherBean_1a3xc3_EOImpl_WLSkel.invoke(Unknown
Source) atweblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:159)
atweblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java
:262)
atweblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java
:229)
atweblogic.knex.bean.RemoteDispatcherBean_1a3xc3_EOImpl_WLStub.invoke(Unknown
Source) atweblogic.knex.dispatcher.Dispatcher.remoteDispatch(Dispatcher.java:96)
at weblogic.knex.dispatcher.Dispatcher.dispatch(Dispatcher.java:73)at weblogic.knex.dispatcher.HttpServer.exploreExec(HttpServer.java:464)
at weblogic.knex.dispatcher.HttpServer.doGet(HttpServer.java:370)at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) atweblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(Servle
tStubImpl.java:945)
atweblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:332)
atweblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:242)
atweblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(W
ebAppServletContext.java:5352)
atweblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManage
r.java:718)
atweblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
ntext.java:3032)
atweblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
:2466)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:152)at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:133)
Service Response
When I comment out the instantiation of my EmailJMS(jmsURL) object, theweb service
initializes just fine. However, I don't have the JMS connection to myother server.
What is this stack trace telling me? How do I receive unsolicited JMSmessages in
a web service?
Thanks,
Bob Gontarz
[SendMessages.jws]
[HelloWorld.jws]