[rules-users] org.drools.runtime.rule.WorkingMemoryEntryPoint

[Wolfgang Laun]

On Fri, Mar 27, 2009 at 7:23 PM, Greg Barton <greg_barton at yahoo.com> wrote:

>
> I'm not sure about the rationale of the Drools devs, but I can give an
> example of that design pattern from another rules package.
>
> At my workplace (Southwest Airlines) we use Tibco BusinesEvents, and BE has
> the concept of Channels with Destinations that produce Events.  A Channel
> can be mapped to various message producers (we mainly use JMS topics and
> queues) and our internal event types are mapped to the message types inside
> the Destination.
>
> This design pattern can be useful because often data with the same format
> can come from different sources, and the application may want to react
> differently mattering on the source.  Also, there may be reasons you can't
> or don't want to include that source information in the data itself.
>
> For example, my current work deals with the airline's flight schedule, and
> reacting to daily changes in that schedule.  We get RouteChange messages
> from various sources. (Sometimes due to a flight cancellation, and other
> times due to a flight addition.)  We react differently to a RouteChange
> mattering on the reason, but the reason isn't encapsulated in the message,
> it's in the source.  Thus it's nice to have multiple WM entry points, as
> otherwise we'd need yet another translation layer to inject a source marker
> into our RouteChangeEvent.
>

This makes sense, and I was thinking that the Entry Point might leave its
tracks in some org-drools.event.rule.*Event, bu tI couldn't find any
reference to WorkingMemoryEntryPoint in any of these. So, is there a way of
knowing the WMEP thorugh wich a fact has arrived?

-W


>
> GreG
>
> --- On Fri, 3/27/09, Wolfgang Laun <wolfgang.laun at gmail.com> wrote:
>
> > From: Wolfgang Laun <wolfgang.laun at gmail.com>
> > Subject: [rules-users] org.drools.runtime.rule.WorkingMemoryEntryPoint
> > To: "Rules Users List" <rules-users at lists.jboss.org>
> > Date: Friday, March 27, 2009, 12:26 PM
> > Where would I find information about the rationale of having
> > multiple named
> > WM entry points?
> >
> > Thanks
> > -W
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> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
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