jBPM 3.1 Decision Node Example Code

[iterrell]

Is there any example code for a decision node in version 3.1? I'm migrating my code from 3.0.2 and it sounds like that has to change to a JSP-like syntax. Unfortunately, I don't see any relevant code snippets in the user guide, the migration guide, or in src/process.examples.

Here's my test process:

<process-definition name="New Decision Node Test">
 <start-state name="start">
 <transition name="start" to="decide" />
 </start-state>
 <decision name="decide">
 <transition name="default" to="n1"/>
 <transition name="2" to="n2">
 <condition>
 <![CDATA[#{x == 2}]]>
 </condition>
 </transition>
 <transition name="3" to="n3">
 <condition>
 <![CDATA[#{x == 3}]]>
 </condition>
 </transition>
 </decision>
 <state name="n1">
 <transition name="finish" to="end" />
 </state>
 <state name="n2">
 <transition name="finish" to="end" />
 </state>
 <state name="n3">
 <transition name="finish" to="end" />
 </state>
 <end-state name="end"/>
</process-definition>

Executing the above code I always go to n1, even when I have set (the Integer) x to 2, or 3. Am I doing something incorrectly with the new expressions?

Ian

[iterrell]

Haha. Further experimentation shows me what I can only assume must be a bug in the interpretation of whitespace.

The following revision to the test process works as expected:

<process-definition name="New Decision Node Test">
 <start-state name="start">
 <transition name="start" to="decide" />
 </start-state>
 <decision name="decide">
 <transition name="default" to="n1"/>
 <transition name="2" to="n2">
 <condition><![CDATA[#{x == 2}]]></condition>
 </transition>
 <transition name="3" to="n3">
 <condition><![CDATA[#{x == 3}]]></condition>
 </transition>
 </decision>
 <state name="n1">
 <transition name="finish" to="end" />
 </state>
 <state name="n2">
 <transition name="finish" to="end" />
 </state>
 <state name="n3">
 <transition name="finish" to="end" />
 </state>
 <end-state name="end"/>
</process-definition>

However, if you have even one space, it won't evaluate the conditions. For instance, the following process always goes to n1.

<process-definition name="New Decision Node Test">
 <start-state name="start">
 <transition name="start" to="decide" />
 </start-state>
 <decision name="decide">
 <transition name="default" to="n1"/>
 <transition name="2" to="n2">
 <condition> <![CDATA[#{x == 2}]]></condition>
 </transition>
 <transition name="3" to="n3">
 <condition> <![CDATA[#{x == 3}]]></condition>
 </transition>
 </decision>
 <state name="n1">
 <transition name="finish" to="end" />
 </state>
 <state name="n2">
 <transition name="finish" to="end" />
 </state>
 <state name="n3">
 <transition name="finish" to="end" />
 </state>
 <end-state name="end"/>
</process-definition>

Uh oh. :)

[iterrell]

http://jira.jboss.com/jira/browse/JBPM-559

[marcoferraz]

HI iterrell!!

I put the code that u submited on the source page of my process definition..
I deployed it.. but on the JBPM administration page.. i don´t have a "start process link" to start it-..i only have the reference that he is there...!! Did u know what is the problem?? i put the code just like u submit it!!

other question.. on your example u work with the variable "x".. where you did the definition of that variable? and.. how? and also..


Thanks a lot!!
marco