Business rule execute only once on jbpm process

Question

I execute a business rule from a process on Jbpm, the rule is simple:

 package com.test.flow;

 rule "sample"
    ruleflow-group "test"
    when

    then
        System.out.println("Hello World");
 end

But, I don't no why, this rule execute only once, for instance, I run a new instance of the process and in the jbpm console print "Hello World", but, when I run a second instance of the process doesn print anymore "Hello World", some one can you help me? or tellme why does this happen?

Screen Jbpm console

Are you using the same session for all your process instances? What happen if you use individual sessions for each instance? — Esteban Aliverti
Thanks for reply, I dont shure, I am using Java Remote API, and each time make a call, I make a RuntimeEngine engine = RemoteRuntimeEngineFactory.newRestBuilder().addUrl(baseUrl)... to obtain a new KieSession with engine.getKieSession() and start the process, if I do that from jbpm-console web, run a new instance occur the same. — Daniel Alvarez
@EstebanAliverti Thanks very much!!! I found the solution, you are right, the problem was the session, but not in my code, else in the configuration of the project on jbpm, I did configure the "Project Editor" the "Deployment Descriptor" I change the value "Runtime Strategy" It was "SINGLETON" for "PER_REQUEST" or "PER_PROCESS_INSTANCE" and I solved the problem. Thank you very much!!! — Daniel Alvarez

laune laune · Accepted Answer · 2017-02-12T18:39:20

For this kind of "hello-world" rule, using ruleflow-group is most likely just causing confusion. Do you control when this group is activated? How? - Omitting this rule attribute is indicated.

A rule with an empty left-hand-side will execute only once in a session (as Esteban pointed out).

If you want a rule that fires once for each inserted fact, use

rule "new fact"
when
    Object()
then
    System.out.println( "new fact inserted" );
end

Business rule execute only once on jbpm process

1 Answers