[jboss-user] [jBPM] - Re: Access variables bound to process instance during its lifecyle

[Shobhit Tyagi]

Shobhit Tyagi [https://community.jboss.org/people/roxy1987] created the discussion

"Re: Access variables bound to process instance during its lifecyle"

To view the discussion, visit: https://community.jboss.org/message/819172#819172

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To read a process variable you could use the following code :


public Map<String, Object> getProcessVariables(final long intProcessInstId
 
) {
  StatefulKnowledgeSession objKSession = getSession(); //Get the session
   Map<String, Object> hshVariables = null;
  
  try {
   hshVariables = objKSession.execute(new GenericCommand<Map<String, Object>>() {
    private static final long serialVersionUID = 1L;
 
    public Map<String, Object> execute(Context objContext) {
           StatefulKnowledgeSession objKSession = ((KnowledgeCommandContext) objContext)
                        .getStatefulKnowledgesession();
           org.jbpm.process.instance.ProcessInstance objProcessInstance = (org.jbpm.process.instance.
                           ProcessInstance) objKSession.
                           getProcessInstance(intProcessInstId);
           VariableScopeInstance objVariableScope = (VariableScopeInstance) objProcessInstance.
                          getContextInstance(VariableScope.VARIABLE_SCOPE);
        /*Obtiene las variables del Proceso*/
           Map<String, Object> hshVariables = objVariableScope.getVariables();
           return hshVariables;
       }
   });
  } catch(Exception objException) {
   objLogger.loggerError(objException);
  } 
  return hshVariables;
 }
 


And to put a variable in the process


public void setProcessVariables(final long intProcessInstId, final Map<String, Object> hshVariableMap)
{
  StatefulKnowledgeSession objKSession = getSession(); //Get the session
  try {
   objKSession.execute(new GenericCommand<Map<String, Object>>() {

    private static final long serialVersionUID = 1L;

    public Map<String, Object> execute(Context objContext) {
           StatefulKnowledgeSession objKSession = ((KnowledgeCommandContext) objContext).
                      getStatefulKnowledgesession();
           org.jbpm.process.instance.ProcessInstance objProcessInstance = (org.jbpm.process.instance.
                           ProcessInstance) objKSession.
                           getProcessInstance(intProcessInstId);
           VariableScopeInstance objVariableScope = (VariableScopeInstance) objProcessInstance.
                       getContextInstance(VariableScope.VARIABLE_SCOPE);
           Iterator<Map.Entry<String, Object>> objIterator = hshVariableMap.entrySet().iterator();
           Map.Entry<String, Object> objPairs;
           while(objIterator.hasNext()) {
            objPairs = (Map.Entry<String, Object>)objIterator.next();

            objVariableScope.setVariable(objPairs.getKey(), objPairs.getValue());
           }
           return null;
       }
   });
  } catch(Exception objException) {
   objLogger.loggerError(objException);
  }
 }
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