[rules-users] How to execute a Process API result?

[Scott Stevenson]

Got it! Thanks Kris and Mauricio for your guidance on this.

-----Original Message-----
From: Kris Verlaenen [mailto:kris.verlaenen at cs.kuleuven.be] 
Sent: Monday, November 02, 2009 6:01 PM
To: Rules Users List; Scott Stevenson
Subject: Re: [rules-users] How to execute a Process API result?

Scott,

A process is also "compiled" before it is executable.  To load a process
constructed using the API, either:

 * load it as any other process by transforming it to XML first using
the XmlRuleFlowProcessDumper

 * compile the process before adding it to your rulebase, using
ProcessBuilder.buildProcess(..)

Kris

Quoting Scott Stevenson <scott.stevenson at datacert.com>:

> I'm trying to execute the result of the Process API and running into
> problems most likely stemming from my ignorance. I'm creating a new
> process following the sample code from section 3.1.3.2 of the User
> Guide. My sample process consists of:
> 1. StartNode
> 2. ActionNode that prints Hello World
> 3. EndNode
> 
> What I don't understand is how to get my new process into a
> KnowledgeBase and KnowledgeSession for execution. I've tried the
> following (Drools 4 method, I believe) as well:
> 
> 	AbstractRuleBase ruleBase = (AbstractRuleBase)
> RuleBaseFactory.newRuleBase();
> 	ruleBase.addProcess(createProcess());
> 	InternalWorkingMemory workingMemory = new ReteooWorkingMemory(1,
> ruleBase);
> 	
> workingMemory.startProcess("org.drools.sample.workflow.dynamic");
> 
> The result of the previous code is a RuntimeException (unable to
> execute
> Action). Inner exception is null pointer from inside the
> ActionNodeInstance class. Where am going wrong in implementing the
> Process API?
> 
> Thank you,
> Scott Stevenson
> 
> _______________________________________________
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> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
> 




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