[jboss-user] [JBoss jBPM] - setting and accessing process variables in jpdl

Hello, I am wondering how/if it is possible to set and access process variables from JPDL. I am most interested at the moment in being able to assign the return value from an action expression to a process variable for use elsewhere in my process definition. Here is a snippet from my process definition (not necessarily working) that invokes a Seam service/component and accepts a parameter and returns a String value or null, which I will test against in a transition element, and then use as a parameter in another action expression. Ultimately, the result of the latter service invocation will also be passed as a parameter to another service, although not shown here: | <process-definition xmlns="http://jbpm.org/jpdl-3.1.xsd" | name="interpretationProcess"> | | | <start-state name="start"> | <transition name="begin" to="determineInterpretationProcess"></transition> | </start-state> | | <node name="determineInterpretationProcess"> | <action expression="#{interpretationLookup.getIntepretationName($recordID)}"/> | <transition condition="#{empty interpretationName}" to="completed"/> | <transition condition="#{not empty interpretationName}" to="doInterpretation"/> | </node> | | <node name="doInterpretation"> | <action expression="#{interpretationService.doInterpretation($interpretationName)}"/> | </node> | | <end-state name="completed" /> | | </process-definition> | There are two issue I have here: 1. $myVar is a process instance variable created when my process instance is created - can it be referenced as shown above in an expression? 2. How would I assign the return value of my expression to a variable with some scope that is accessible within my process? My sense so far is that I may need to use the element... Note that I would like to avoid having a "stateful" service (in which I invoke a method that does not return a value, but has a separate method for retrieving the result of the method). I have seen this in at least one example, but I would prefer not to do this. thanks, Shea. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4031779#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...