RE: Async vs Sync processes

[sudhirk@samarthtech.com]

Interesting! I have developed simplified workflow application. All you have
to do is implement one interface for your task/operation. It uses database
tables as well as XML based workflow definition. I am still working on packaging
this.

It lets you define restart transaction group based on which your process
restarts from last failed/stopped task/operation.


Sudhir

>-- Original Message --
>From: "Brian Lee" <brian_a_lee@hotmail.com>
>To: ajug-members@ajug.org
>Subject: Async vs Sync processes
>Date: Thu, 14 Nov 2002 10:13:43 -0500
>
>
>I've been wondering a bit about a problem we have and I propose it to the
>
>group for your suggestions.
>
>I'm working on an app where we have a process that needs to be completed.
>
>Certain portions are asynchronous. I.e. We send off a request for an id
and
>
>continue working on other stuff until it comes back.
>
>Now the problem I'm encountering is that we don't have a good way to restart
>
>the process once it's gone async. The current proposal is to store state
>in 
>the db and then have a process that polls or sweeps the db looking for
stati
>
>and reinitiating the process.
>
>Now I am against pollers for many, many reasons but can't think of a good
>
>way to restart the process flow after I've dropped something off async

>(because I want the whole thing to persist if my app server goes down).
>
>We're forced to use WebSphere so if there's any cool workflow apps out
there
>
>I'd love to hear about it.
>
>Semi-detail of process
>1. User Creates Order
>2.1 If valid customer id exists then send order on to fraud check
>2.2 If invalid customer id then wait for external process to update customer
>
>id
>2.2.1 Reinitiate process once customer id comes in
>3.1 If pass fraud check then proceed
>3.2 If fail fraud check then wait for manual processing
>3.2.1 Reinitiate process once manually processed
>4. Send order to fulfillment
>
>There is some thought of having the processes that receive the async 
>responses (2.2 and 3.2) reinitiate the processes manually. But if there
are
>
>errors then we will need something that resubmits the orders after a certain
>
>amount of time.
>
>Any thoughts or books or web sites are appreciated.
>
>Thanks,
>BAL
>
>
>
>
>
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