RuleTask as the 1st in the process

[jmfaerman]

When the first rule in the process is a RuleTask, there is no time to insert the process instance (WorkflowProcessInstance()) so that rules can work on process data. If i put a timer or a human task before the RuleTask, it works, but that's not part of the process....

Is there a way to prepare a process for execution, inserting the process instance, and then start it ?

[bpmn2user]

I am trying to understand your usage.

Here is an example http://community.jboss.org/people/bpmn2user/blog/2011/03/07/jbpm5--ruletask-example.  It works even if the first one is

'RuleTask', 

[jmfaerman]

I see... it must be something else then... placed another post for it ( http://community.jboss.org/thread/163643?tstart=0 )

In this process you mentioned, why is the fact passed as both a parameter AND inserted in the session:

...

params.put("hpm", hpm);

ksession.insert(hpm);

...

Shouldn't it be one or the other?

[bpmn2user]

Good point!

I also noticed that if you do only one (i.e, fact is passed as a paramter or inserted in session), it would throw an exception.

Perhaps, Kris or Salaboy can clarify if there is another way to do this.

[jmfaerman]

I also noticed that the ruletask example doesn't reference the process instance.... the .drl reads:

...

    when

        m:HelloProcessModel(userlocation in ("NewYorkUser"), count < 4)

Shouldn't it be something like:

...

    when

        p:WorkflowProcessInstance()

        m:HelloProcessModel(userlocation in ("NewYorkUser"), count < 4) from p.getVariable("hpm")

?

[bpmn2user]

There are several ways to write the rules. This example shows one approach applying the rules on the HelloProcessModel.

These rules can easily be represented in a decision table:

http://community.jboss.org/people/bpmn2user/blog/2011/03/07/jbpm5--ruletask-example-using-an-excel-decision-table

[jmfaerman]

the problem is that my rule doesn't fire when i use

        $process: WorkflowProcessInstance()

even thou it is inserted. is there a way to debug the matching/working memory?

[bpmn2user]

Did you look at the Drools debug and audit log functions?

BTW, thanks for pointing out the following. Yes! We do not need both. I modified the blog and it only uses params.put("hpm",hpm).

Later in the Hello script node it inserts the hpm into kcontext (kcontext.getKnowledgeRuntime().insert(hpm);)

--------------------------------------------------

In this process you mentioned, why is the fact passed as both a parameter AND inserted in the session:

...

params.put("hpm", hpm);

ksession.insert(hpm);

...

Shouldn't it be one or the other?

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