Randy
You may be able to create a bean for each subprocess, the them to doWork
with
the given criteria and then listen for completion events from each
worker bean.
I'm sure there will be interesting responses.
Tony
----
Mcree, Randy wrote:
>
> Dear EJB'ers,
>
> My colleagues and I were attempting to model a telco application using EJB.
> The application currently runs on a CORBA server and makes heavy use of
> threading to perform work in parallel. Because of the programming
> limitations in EJB (cf section 16.4) we are not sure that we can model this
> application in EJB?.
>
> This application creates customer's phone bills. For each customer, the bill
> consists of the aggregation of the costs over all phones during the billing
> period. The costs are contained in call detail records. These records are
> stored in a partitioned database, spread across many physical disks, in
> order to support simultaneous queries. The current application creates
> subprocesses which more or less simultaneously queries all of a customer's
> phones for records within a given time span. The result of each subprocess
> is asynchronously returned to an aggregation function which waits for all
> subprocesses to "report in". It seems like this aggregation function cannot
> be implemented as an EJBean because, as a bean, it cannot spawn threads,
> which is key to creating the necessary parallelism. The parallelism is
> necessary in order to complete the bill in a reasonable time. Note that the
> hardware of the system is set up for this task: multiple disks, multiple
> cpus, multiple paths from cpu to disk...we need the software to take
> advantage of these capabilities.
>
> If we stick the aggregation function into, say, a CORBA server, then the
> question becomes, why EJB? There is a lot of business logic at that point
> (tax calculations, customized customer items, etc.) that seem beneficial to
> express within a bean.
>
> Thanks in advance for any insights...
>
> Randy McRee
> Sr. Software Developer
> Tandem division of COMPAQ
>
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--
Tony Holderith | Interactive Business Solutions
[EMAIL PROTECTED] | NetCentric Solutions
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