gfh

topic means one to many relation ship and queue in the sence
one to one relation ship

sorry when i was gone through JMS
i found one to one is Queue(i.e, poin to point)
topic is sender and publisher(i.e, one to many)

JMS Topic is a JMS managed object used to manage message 
comminucation between publisher ( sender of message) and 
subscriber ( receiver of message).

Queue is JMS managed object used for holding messages 
waiting for subscribers to consume. When all subscribers 
consumed the message , message will be removed from queue.

To put an anology with email system consider all emails 
with subject 'Offers from Tesco Stores'. This subject is 
called topic. If there are multiple messages of same 
subject headings, it will be called as queue, waiting to be 
read.

1.After reciving message from JMS, byusing Queue connection 
factory can send it to exact mdb, i,e point to point.

2.After reciving message from JMS, byusing Topic connection 
factory can send it to one r multiple mdb's, i,e Publish to 
Subcribe.

The Java Message Service(JMS) API for accessing enterprise
messaging systems. It is part of the Java 2
platform,Enterprise Edition(J2EE). The Java Message Service
makes it easy to write business applications that
asynchronously send and receive critical business data and
events.
   The java Message Service defines a common enterprise
messaging API that is designed to be easily and efficiently
supported by a wide range of enterprise messaging products.
   The java Message Service supports both message queing and
publish-subscribe styles of messaging.

In Struts, Global forwards are the action forwards which 
can be forwarded from any action. 

Consider, log out link, that will be present in all the 
page, so, u can't write a forward in all the action mapping 
and check. so, struts is using global forwards, whatever 
forward declared in the global forwards can be visible to 
all action mapping. We will use global forwards in 
situtaions like logoff, error page.

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The question is not clear, is it Struts Navigation Flow ?
Then let me know, i will post the answer

what if a action has the same forward name as a global 
forward. which one will be picked for the action mapping?..