0 Replies Latest reply on Jan 30, 2013 10:25 AM by wishmaster7

    jBPM 5.4 : Signal Event and VariableName

    wishmaster7 Newbie

      Hi all,


      I am a beginner with jBPM and I need some help with the signal event; all I have found in the documentation (and in the web chat) is something like :


      VariableName: The name of the variable that will contain the data associated with this event (if any) when this event occurs.


      And this doesn't help much...



      So I have created a basic example with a start node, then a AND gateway which waits for the signal event. I'm working with jBPM REST webservices; first I call :


      POST: http://localhost:8080/gwt-console-server/rs/process/definition/myProcess/new_instance


      and in the json return, I get the process instance id (in this example: 57). Then I call :


      POST: http://localhost:8080/gwt-console-server/rs/process/tokens/57/transition?signal=receiveInitData


      and this pefectly triggers the signal event. But I want to pass parameters, and I think the "VariableName" of the signal event is suitable for that. So I have the "woId" variable, but its value is always null.




      Here is, in my Java application, the code I use to call the POST webservice:


      private String requestPostService() throws Exception {


      String url =


          // here is my map with the parameter I want to pass to the jBPM process

          List<NameValuePair> formparams = new ArrayList<NameValuePair>();
          formparams.add(new BasicNameValuePair("woId", "testValue"));


              HttpPost httpPost = new HttpPost(url);

              UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, "UTF-8");

              HttpClient httpClient = new DefaultHttpClient();

              HttpResponse response = httpClient.execute(httpPost);

         // the getRequestString() method is parsing the response

              return this.getRequestString(response);





      And in attachement, the process BPMN file.


      I don't know what is missing; in the console, it's printing:


      Init data...




      "Init data" is the string called in "Init Data" task; null is the value of my variable.


      Someone has an idea?