JMS is a specification for message-oriented middleware. JMS implementations
are used in cases where you want to provide loose coupling between systems
using either a publish-subscribe or point-to-point paradigm. JMS supports
message persistence, filtering, verification, and transactional semantics. Use
it where and if it makes sense for the needs of your application.
Mike
"Murthy, A (CAP, GEFA, Contractor)" wrote:
> Could any one please tell me what exactly the work of JMS? when do we need
> to use JMS in our applications? is it mandatory to use it with in our
> Application Servers?
>
> Murthy A Suryanarayana
> GE Financial Assurance
> LTC - OPS2000 Project
> ------------------------------------------------------------------------
> -------------------
> Day : (415) 492 7834
> Dial-Com : 8 * 277 7834
> Fax : (415) 492 7699
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>
> -----Original Message-----
> From: Rick Hansen [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, August 24, 2000 6:18 AM
> To: [EMAIL PROTECTED]
> Subject: Re: Asynchroneous calls EJB -> EJB
>
> I am not an expert, but I beleive that you need to use JMS (Java Messaging
> Services) for any asynchronous communications.
>
> Rick Hansen
>
> >-----Original Message-----
> >From: Kaj Bjurman [mailto:[EMAIL PROTECTED]]
> >Sent: Thursday, August 24, 2000 2:41 AM
> >To: [EMAIL PROTECTED]
> >Subject: Asynchroneous calls EJB -> EJB
> >
> >
> >Hi,
> >
> >Thank you all for the input on my question regarding EJB
> >accessing/using
> >files...
> >
> >I have yet another question...
> >Is it possible to perform an asynchroneous call from an EJB to
> >another EJB.
> >
> >Lets say that I have a session bean which has the method:
> >public JobID calculateInterest()
> >
> >And when that method runs it will call, calculate() on
> >different types of
> >EJBs. Each type will be able to calculate interest using different
> >algorithms (and each calculation will be an lengthy operation)
> >
> >Now I would like to implement calculateInterest as (in pseudo):
> >
> >public JobID calculateInterest() {
> > JobID jobId = ... // get a new id
> >
> > //get an array of stateless session beans, which can calculate
> > //different types of interest.
> > CalculatingBean[] calcBeans = new ......
> >
> > //Store jobId and beans in a hashtable or something similar.
> >
> > //Now start a thread for each bean
> > for (int i=0; i < calcBeans.length; i++) {
> > new Thread() {
> > public void run() {
> > calcBeans[i].calculate();
> > }
> > }.start();
> > }
> > return jobId;
> >}
> >
> >I know that I can't create Threads, so how do you solve such problem in
> >EJBs?
> >
> >
> >/Kaj
> >
> >
> >Ps.
> >I know that this might look like an odd problem, but I know
> >that I will have
> >to solve a similar problem in the near future.
> >
> >
> >~~~~~~~~~ ~~~~ ~~~ ~~ ~ ~ ~ ~
> >[EMAIL PROTECTED]
> >+46 70 4200148
> >
> >===============================================================
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> >
>
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--
//////////////////////////////////////////////////////
//
// Mike Clark
//
// Clarkware Consulting
// Enterprise Java Architecture, Design, Development
//
// http://www.clarkware.com
// [EMAIL PROTECTED]
// +1.720.851.2014
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