RE: design question, how to handle this project

[Sergio Carabetta <Sergio.Carabetta@xxxxxxxxxxx>]

Ashish,

The MOM scenario:

Use any messaging middleware (including WebSphere MQ) to send an XML
formatted "request-for-data" to all participating (registered) AS400s. Each
request should specify a common destination (reply to queue) where your web
app will wait for responses. In the AS400s, the messaging server will
trigger the agent upon receipt of the request. The agent will process it,
collect the data, and return an XML formatted response to the mentioned
reply-to queue. In the meantime, your web app will be waiting for the
responses, handling them as they arrive.

The async nature of this scheme allows all of your AS400s to collect and
process the data almost in parallel, because you "fired and forgot" the
request instead of the serial round-robin approach.

I would recommend this scenario only if the data collection process takes a
considerable time. For almost instant queries, maybe a DDM or JDBC approach
will be better.

Sergio



>> message: 7
>> date: Thu, 22 Jul 2004 07:49:18 -0700 (PDT)
>> from: Ashish Kulkarni <kulkarni_ash1312@xxxxxxxxx>
>> subject: RE: design question, how to handle this project

>> Hi
>> Thanx for the emails, now that i have some more idea
>> about my project, this is a MRP system which maintains
>> inventory etc, so i have to build a web interface
>> which  will collect information from all the AS400
>> systems and display them in one page.
>> 1) I can develop "agent", which is a java program
>> which is knows the database(different versions of my
>> application), and i call this java program which will
>> extract data from AS400 and return it to my main
>> application to display.
>> 2) DO you suggest to use MQSeries or ome messaging
>> service to get data, instead of using JDBC .
>> 3) How can i make the process parallel, so instead of
>> going one database at a time, spawn a web of request
>> and get the data from different systems?

>> Thanx for all the help
>> Ashish