JMS Question

[Rama Ghanta]

Hello Ranchers
I am working on Part II, below is my concern on JMS

"My application's inventory system keeps track of all the products. Now the actual manufacturer of the products has a inventory system that uses industry standard interface based on JMS. My application has to get automatic updates on the availability of products"

Should my app be using MDB's to receive updates from the manufacturer?

Thank you
Rama Zha

[wang andrew]

here are some of my understandings:

"My application's inventory system keeps track of all the products", this is about the local inventory , which manages all the products in stock. so this local inventory is used for "check availability of products".

we will only need to send JMS order message to Manufacturer's inventory system when number of the product in local inventory reach below certain threshold, which could be done either manually through separate jsp or automatically through some daemon or other mechanism. I don't think manufacturer's system will send update message to client's system .

[Rama Ghanta]

The "Check Availability module" needs to send a message to the manufacturer about the availability of the product. The manufacturer responds with a number.

Now since the manufacturer uses JMS interface, should my local inventory use MDB's to consume the message from the manufacturer? can this MDB also send a message requesting the availability of the product?

Honestly, I am very confused!!


Thanks
Rama Zha

Originally posted by wang andrew:
here are some of my understandings:

"My application's inventory system keeps track of all the products", this is about the local inventory , which manages all the products in stock. so this local inventory is used for "check availability of products".

we will only need to send JMS order message to Manufacturer's inventory system when number of the product in local inventory reach below certain threshold, which could be done either manually through separate jsp or automatically through some daemon or other mechanism. I don't think manufacturer's system will send update message to client's system .

[wang andrew]

first I don't think Manufacturer will initiate a Jms message to client's system. To check the Manufacture's inventory, we need to send a jms message to Manufacture's jms server, and also create a temporary queue as a reponse queue, the response queue information could be contained in request message or "replyTo" header, then manufacturer's system could send the product availability into the response queue. we need to poll that temp queue to get reponse msg.

[srav kandy]

Wang, Did you also work on this assignment.

[Purav Gandhi]

As per my understanding I would like to propose following solution:
1) Our application needs to get the updates on the stock availability from the actual manufacturer. Hence if we are out of stock or reached the Minimum Ordering Level, we will generate a asynchronous JMS message to the manufacturer queue requesting the availability of the stock.

2) The manufacturer on receiving the message in-turn will send us the actual update on the stock.

Hope this helps.