6:10 a.m.
The subject says it all really: is there any way of determining the
knowledge session ID from the WorkItem argument (or WorkItemManager
argument?) passed in to the executeWorkItem method of an implementation of
the WorkItemHandler interface?
Any help would be very much appreciated.
Thanks,
Alan
6:29 a.m.
Hi Alan,
On 2010-05-04 13:10, Alan.Gairey(a)tessella.com wrote:
The subject says it all really: is there any way of determining the
knowledge session ID from the WorkItem argument (or WorkItemManager
argument?) passed in to the executeWorkItem method of an implementation
of the WorkItemHandler interface?
I had the same problem so i simply extended the work item handler interface like this:
public interface SessionAwareWorkItemHandler extends WorkItemHandler {
StatefulKnowledgeSession getKnowledgeSession();
void setKnowledgeSession(StatefulKnowledgeSession session);
}
If you register a SessionAwareWorkItemHandler, just let him know about the session:
if (handler instanceof SessionAwareWorkItemHandler) {
SessionAwareWorkItemHandler sessionAware = (SessionAwareWorkItemHandler)handler;
sessionAware.setKnowledgeSession(ksession);
}
ksession.getWorkItemManager().registerWorkItemHandler("workItem", handler);
Hope this helps, it works for me.
- chris
10:16 a.m.
@Alan,
Implementation of WorkItemHandler is a custom ( "your" ) component. This
means that this implementation may have anything injected ( set as property
or at construction time ).
Let's say you implement "YourCustomWorkItemHandler" to take a
"session
id" at the construction time ( good choice :) ), then to start the process
you would:
session = create a newStatefulKnowledgeSession()
session.getWorkItemManager().registerWorkItemHandler(
"WorkItemName", new YourCustomWorkItemHandler( session.getId() ) );
session.startProcess( "process-name" );
/Anatoly
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10:37 a.m.
Anatoly, if you can share your generic implementation that would be nice..
because a lot of people is looking for something like that.
I prefer custom and domain specific implementation, but it seams that a lot
of people is looking for something generic that can be reused.
I can blog about that generic idea too to spread the word and also mention
the different situations and the perspective of having decoupled and coupled
applications to the work items.
On Tue, May 4, 2010 at 11:16 AM, tolitius <webakaunt(a)gmail.com> wrote:
@Alan,
Implementation of WorkItemHandler is a custom ( "your" ) component. This
means that this implementation may have anything injected ( set as property
or at construction time ).
Let's say you implement "YourCustomWorkItemHandler" to take a
"session
id" at the construction time ( good choice :) ), then to start the process
you would:
session = create a newStatefulKnowledgeSession()
session.getWorkItemManager().registerWorkItemHandler(
"WorkItemName", new
YourCustomWorkItemHandler( session.getId() ) );
session.startProcess( "process-name" );
/Anatoly
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- Salatino "Salaboy" Mauricio -
8:23 a.m.
New subject: Drools Flow: how to get knowledge session ID from WorkItem
Chris, Anatoly, Mauricio,
Thanks for your replies. I had implemented a solution similar to that
suggested by Chris; my work item handlers are defined as Spring beans, so
as long as they are defined with scope="prototype", the knowledge session
can be injected into the handler.
I just wondered if there was a "simpler" way of determining the session
directly from the work item.
Anyway, thanks again for your help,
Alan
Mauricio Salatino <salaboy(a)gmail.com>
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04/05/2010 16:53
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Re: [rules-users] Drools Flow: how to get knowledge session ID from
WorkItem
Anatoly, if you can share your generic implementation that would be nice..
because a lot of people is looking for something like that.
I prefer custom and domain specific implementation, but it seams that a
lot of people is looking for something generic that can be reused.
I can blog about that generic idea too to spread the word and also mention
the different situations and the perspective of having decoupled and
coupled applications to the work items.
On Tue, May 4, 2010 at 11:16 AM, tolitius <webakaunt(a)gmail.com> wrote:
@Alan,
Implementation of WorkItemHandler is a custom ( "your" ) component.
This
means that this implementation may have anything injected ( set as
property
or at construction time ).
Let's say you implement "YourCustomWorkItemHandler" to take a
"session
id" at the construction time ( good choice :) ), then to start the process
you would:
session = create a newStatefulKnowledgeSession()
session.getWorkItemManager().registerWorkItemHandler(
"WorkItemName", new
YourCustomWorkItemHandler( session.getId() ) );
session.startProcess( "process-name" );
/Anatoly
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http://drools-java-rules-engine.46999.n3.nabble.com/Drools-Flow-how-to-ge...
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4 comments
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participants (4)
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Alan.Gairey＠tessella.com -
Chris Raschl -
Mauricio Salatino -
tolitius