How to cast back and use a retrieved Session Bean reference in a servlet?

Please help!
1. I invoke a Session Bean from a servlet :
travelagent = home.create();
2. I store the travelagent reference in the HTTP Session :
session.setAttribute( "travelagent" , travelagent );------------------------------------------------------------------------------------------------------------------
Now, in another servlet, I have to retrieve the reference to the EJB from the HTTPSession.
I then have to use this reference to call a business method in the EJB Session Bean.
I have tried two ways to retrieve the reference and cast it before calling the business method. I get errors in both forms of casting.
The Values you will see below in the code:
EJB Remote Interface : TravelAgent (TravelAgent.java)
Business Method : listItineraries( )
Servlet which calls the above method : ListItinerary.java
Line 46 of ListItinerary.java : ArrayList itineraries = traveler.listItineraries();------------------------------------------------------------------------------------------------------------------
The two ways along with the error I get on the servlet page in the browser are :
(A)
TravelAgent traveler = (TravelAgent)session.getAttribute("travelagent");The error I get is :
java.rmi.NoSuchObjectException: CORBA OBJECT_NOT_EXIST 9998 Maybe; nested exception is:
     org.omg.CORBA.OBJECT_NOT_EXIST: vmcid: 0x2000 minor code: 1806 completed: Maybe
com.sun.corba.ee.impl.javax.rmi.CORBA.Util.mapSystemException(Util.java:208)
     com.sun.corba.ee.impl.javax.rmi.CORBA.Util.wrapException(Util.java:591)
     javax.rmi.CORBA.Util.wrapException(Util.java:277)
     source.traveler.ejb._TravelAgent_Stub.listItineraries(Unknown Source)
     source.traveler.servlet.ListItinerary.processRequest(ListItinerary.java:46)
(B)
TravelAgent traveler =
(TravelAgent)PortableRemoteObject.narrow(session.getAttribute("travelagent"), TravelAgent.class);The error I get is :
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
     java.rmi.RemoteException
     com.sun.corba.ee.impl.javax.rmi.CORBA.Util.wrapException(Util.java:597)
     javax.rmi.CORBA.Util.wrapException(Util.java:277)
     source.traveler.ejb._TravelAgent_Stub.listItineraries(Unknown Source)
     source.traveler.servlet.ListItinerary.processRequest(ListItinerary.java:46)
Could someone advice on how to retrieve and cast the EJBObject's reference from the servlet so that I may use it to call the business method?
Thanks!

Thanks guys! It worked.
1.. I should have used the handle. Got to coding without going deep in the concepts.
2.. I dont know if I could have used the EJB Reference directly (instead of the handle).
3.. The error was due to me not mapping the servlets with the EJBs that they could use. I continued to get the same error even after using the handle. Once I put the mapping to the EJBs correctly, everything fell in place.
Thanks a lot!
Henry

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Robinson, Richard a écrit:
I'm relatively new to forte and I'd like to know how can you handle utility
type classes that you want to use through out your application? Ideally
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Let's say that I have a StringUtil class that has a bunch of methods for
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static class).
Any clues on how to solve this problem would be appreciated.
Also, what is the url at Sage-it that has a summary of all emails that have
been posted to [email protected]? Perhaps this question has been
answered previously.
Thanks in advance
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive <URL:http://pinehurst.sageit.com/listarchive/>-
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive <URL:http://pinehurst.sageit.com/listarchive/>

Hi Richard,
Your question about "utility classes" brings up a number of issues, all of
which are important to long-term success with Forte.
There is no such thing as a static method (method that is associated with a
class but without an implicit object reference - this/self/me "pointer") in
TOOL, nor is there such thing as a global method (method not associated
with a class at all). This is in contrast to C++, which has both, and
Java, which has static methods, but not global classes. Frequently, Forte
developers will write code like this:
result, num : double;
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tmpDoubleData : DoubleData = new;
tmpDoubleData.DoubleValue = num;
result = tmpDoubleData.Sqrt().DoubleValue;
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in places where a C++ programmer would write:
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server that is getting a lot of hits, or if you are doing some intense
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only when you need the object.
If you are looking for a StringUtil class, then you will want to use an
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The next issue you raise is where the object resides. As long as you do
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partition. If you do not pass the object in a call to another partition,
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methods on it. If you have a general utility, like string handling, this
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Summary:
* You may find everything you want in TextData.
* Unless you anchor the object, the instance will reside where you
intuitively expect it.
* To patch over the lack of static methods in TOOL, simply allocate an
instance when required.
Feel free to email me if you have more questions on this.
At the bottom of each message that goes through the mailing list server,
the address for the list archive is printed:
http://pinehurst.sageit.com/listarchive/.
Good Luck,
CSB
-----Original Message-----
From: Robinson, Richard
Sent: Tuesday, March 02, 1999 5:44 PM
To: '[email protected]'
Subject: How do you create and use "common" type classes?
I'm relatively new to forte and I'd like to know how can you handle utility
type classes that you want to use through out your application? Ideally
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object of type StringUtil. The server object will eventually get assigned
to a partition. That's not good since I really want the server object to
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don't want a server object, I just want to invoke a static method of a
static class).
Any clues on how to solve this problem would be appreciated.
Also, what is the url at Sage-it that has a summary of all emails that have
been posted to [email protected]? Perhaps this question has been
answered previously.
Thanks in advance

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