JBPM BPEL 1.1.1 Getting variables of processInstance

[evilsephiroth]

Hi, i've been playing with JBPM BPEL 1.1.1. and deployed some workflow.

My problem is that i can't get the name and the value of the variables that

the workflow consumes...

JbpmConfiguration jbpmConfiguration = JbpmConfiguration.getInstance("bpel.cfg.xml");
JbpmContext context=jbpmConfiguration.createJbpmContext();
ProcessInstance inst= cont.getProcessInstance(new Long(46)) //My process with 2 variables associated of type String
Map varsMap=inst.getContextInstance().getVariables();

With the code above i can get the variables but these variables are MessageValue and i don't know a generic mode to get the String value of

the variables from this MessageValue. I've searched even in MessageValuePart but the data is in Binary..


I don't know if there's a converter or helper that can translate from messageValue saved for every process instance in variables...



Any help is appreciated.

[evilsephiroth]

up...

No one has encountered this problem?

[dhanushgopinath]

I dont think there is any converter as of now.

Here is how I did it

 JbpmContext jbpmContext = GetJbpmConfiguration().createJbpmContext();
 ProcessInstance processInstance = GetJbpmGraphSession(jbpmContext)
 .getProcessInstance(Long.parseLong(strProcessInstanceId));

 // Get the context instance
 ContextInstance processContextInstance = processInstance
 .getContextInstance();
 // get the all token variables map
 Map allTokenVariablsMap = processContextInstance.getTokenVariableMaps();
 // get the correct token for the variable
 Token tokenForVariable = GET THE CORRECT TOKEN HERE FROM THE MAP
 // get the variable from the context instance
 Object variable = processContextInstance.getVariable(strVariableName,
 tokenForVariable);

 // Variable will be an instance of MessageValue
 if (variable instanceof MessageValue) {
 MessageValue messageElement = (MessageValue) variable;
 Map partElems = messageElement.getParts();

 // Get the first Element
 String partName = (String) partElems.keySet().iterator().next();
 Element partElement = (Element) partElems.values().iterator()
 .next();

The partElement is an XML Element . You can recurse through this and get the values using a DOM Parser.

[evilsephiroth]

yes i was doing something similar to get the variables. The problem is the parsing of the element. I want to implement a generic parser for all the processes deployed on the console. But every process has its implementation of variables so i can't effectively know in what node is the variable data(some in the first child, some other in nested childs).

if (variable instanceof MessageValue) {
 MessageValue messageElement = (MessageValue) variable;
 Map partElems = messageElement.getParts();

 // Get the first Element
 String partName = (String) partElems.keySet().iterator().next();
 org.apache.xerces.dom.DeferredElementNSImpl partElement = (org.apache.xerces.dom.DeferredElementNSImpl) partElems.values().iterator()
 .next();
 String valueVar=partElement.getFirstChild().getFirstChild().getNodeValue();
 }

This code won't work for all processes because in another process this line will be :

valueVar=partElement.getFirstChild().getNodeValue();

I was thinking a node searcher/comparer to variable Name but i hope something simpler will come out...

any help is appreciated.