Hi Andre!

As I can see in the code, the "esbToBpmVars" property (from the processdefinition.xml) IS used, but I guess you have to copy it fto Message.getHeader().getCall().getTo() as well (like the token id stuff).

Does that help?

Best thing I can encourage is to look at the code how it is implemented. Even is that is a bit wired in the current implementation (will be rewritten in future).

Cheers
Bernd

Hi Andre,

wouldn't it be nicer to keep this configuration in the processdefinition.xml and just copy this attribute from the replyTo() to the to()?

Cheers
Bernd

Apologies for coming into this late.

The EsbActionHandler should be initialising all information necessary, from the jBPM process definition, so that BpmCallback has access to the information necessary to signal the job.

At present this information includes
- esbToBpmVars
- whether these are set in global scope or not
- token id
- node id
- process instance id
- node version counter

All that should be necessary is to reply using this EPR (done automatically if you have a RequestResponse service) with data which matches the expectations of the process definition.

What I do not understand is why you need to create the EPR, at least if I am following this correctly. Can you please elaborate on this?

Thanks,
Kev

"andreskusa" wrote:
p1. The EsbActionHandler copies the necesary information into the replyTo-EPR of message.header.call, but BpmCallback expects this information at the to-EPR.

"andreskusa" wrote:
So, even if you stay inside jBPM/ESB (i.e., if jBPM starts a service that immediately calls the BpmCallback action) you need to copy the replyTo-EPR to the To-EPR.

"andreskusa" wrote:
p2. This is not really a problem, but merely the fact that if you "leave" the ESB as I described in a. to c. above, you need to get the process information from the message leaving the ESB and set it into the new message (at Header.Call.setTo of course) entering again the ESB and attempting to call back the running jBPM problem. That is why I need to create an EPR. But this works without problems.

"andreskusa" wrote:
Regarding the variable mappings it is like that I know now that these are also to be copied with the other process information (like tokenId etc.). But I need also specify it at all the places I described above (a-c). From your post I understand that you think that it is sufficient to define both mappings (esbToBpmVars and bpmToEsbVars) only at the start of the jBPM process, but this is definitely not the case

"andreskusa" wrote:
I just tested it again. Both mappings need to be specified in all jBPM nodes that leave jBPM into the ESB. If I leave out the bpmToEsb mapping, the changes done inside jPBM are not transimitted to the ESB and if I leave out the esbToBpmVars mapping at this place, the changes in the data done in the ESB are not transferred back to jBPM.

"andreskusa" wrote:
So, the only things I would recommend are to document BpmCallback a bit better if this is really the preferred way for combining jBPM and the ESB. And maybe to get the information from replyTo, where it is already copied to. Then BpmCallback would be more intuitive to use.

"andreskusa" wrote:
One additional thing: I figured out that if you immediately call back the jBPM process after leaving it, (or if you start several times the same process) you need to have a short stop time in between (e.g., Thread.sleep(10) is enough) in order to have jBPM up and ready. If the calls are too fast, the token is still locked. Maybe such a small pause could be included into the call back.

"andreskusa" wrote:
Hope, you understand my setting better and these explanations were not too exhaustive ... :-)

Hi.

First @Andre: I think what Kevin meant is, that if you use the action mep="RequestResponse" in the service you call from the process the JbpmCallback is triggered outomatically, you don't have to code that yourself.

But this is a different use case. There the Callback works as expected out-of-the-box without problems.

Kevin wrote:

Okay, that explains things. It is the correlation between the internal EPR and external services that we are currently missing.

Hi,

I am a new in jboss ESB, I am triyng to make JBPM and JBOSS ESB exchange().

my example is that jbpm calls ESB and get the response, when i test the esb using soapUI the process work fine, but using JBPM i have the exception below

org.jboss.soa.esb.ConfigurationException: No EPR present in process instance

          at org.jboss.soa.esb.services.jbpm.actionhandlers.EsbActionHandler.execute(EsbActionHandler.java:137)

my jboss-esb.xml

<?xml version="1.0"?>
<jbossesb parameterReloadSecs="5"
xmlns="http://anonsvn.labs.jboss.com/labs/jbossesb/trunk/product/etc/schemas/xml/jbossesb-1.3.0.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://anonsvn.labs.jboss.com/labs/jbossesb/trunk/product/etc/schemas/xml/jbossesb-1.3.0.xsdhttp://anonsvn.jboss.org/repos/labs/labs/jbossesb/trunk/product/etc/schemas/xml/jbossesb-1.3.0.xsd">
<providers>
  <jbr-provider name="ibaSommeHttpGateway" protocol="http">
   <jbr-bus busid="ibaSommeHttpGateway" port="9999"/>
  </jbr-provider>
  <jbr-provider name="ibaMultiplicationHttpGateway" protocol="http">
   <jbr-bus busid="ibaMultiplicationHttpGateway" port="7777"/>
  </jbr-provider>
</providers>
<services>
<service category="Calcule"
   description="calcule la somme de deux valeurs" invmScope="GLOBAL" name="somme">
   <listeners>
    <jbr-listener busidref="ibaSommeHttpGateway" is-gateway="true" name="ibaHttpSommeGatewayListener"/>
   </listeners>
   <actions mep="RequestResponse">
    <action class="org.jboss.soa.esb.actions.routing.http.HttpRouter" name="ibaSommeHttpRouter">
     <property name="method" value="POST"/>
     <property name="endpointUrl" value="http://localhost:8080/somme/SommeService?wsdl"/>
     <property name="endpointAdresse" value="http://localhost:8080/somme/SommeService?wsdl"/>
     <property name="reply-to-originator" value="true"/>
    </action>

    <action class="org.jboss.soa.esb.actions.SystemPrintln" name="message">
     <property name="message" value="in the somme yoooou pi ESB"/>
    </action>
   </actions>
  </service>
  <service category="Calcule"
   description="calcule la multiplication de deux valeurs"
   invmScope="GLOBAL" name="multiplication">
   <listeners>
    <jbr-listener busidref="ibaMultiplicationHttpGateway"
     is-gateway="true" name="ibaHttpMultiGatewayListener"/>
   </listeners>
   <actions mep="RequestResponse">
    <action class="org.jboss.soa.esb.actions.routing.http.HttpRouter" name="ibaMultiplicationHttpRouter">
     <property name="method" value="POST"/>
     <property name="endpointUrl" value="http://localhost:8080/multiplication/MultiplicationService?wsdl"/>
      <property name="reply-to-originator" value="true"/>
    </action>
    <action class="org.jboss.soa.esb.actions.SystemPrintln" name="message">
     <property name="message" value="in the multiplication ESB"/>
    </action>
   </actions>
  </service>
</services>
</jbossesb>

and the precessdefinition.xml

<?xml version="1.0" encoding="utf-8"?>
<process-definition xmlns="urn:jbpm.org:jpdl-3.2"
          name="calcule">


          <start-state name="start">
                    <transition to="somme" name="callSomme">
                              <action name="action">
                                        <message>Going to the SOe</message>
                              </action>
                    </transition>
          </start-state>


          <node name="somme">
                    <action
                              class="org.jboss.soa.esb.services.jbpm.actionhandlers.EsbActionHandler">
                              <replyToOriginator>true</replyToOriginator>
                              <esbServiceName>
                                        somme
                              </esbServiceName>
                              <esbCategoryName>
                                        Calcule
                              </esbCategoryName>
                              <replyToOriginator>
                                        reply
                              </replyToOriginator>
                              <bpmToEsbVars>
                                        <mapping bpm="a" esb="a"></mapping>
                                        <mapping bpm="b" esb="b"></mapping>
                              </bpmToEsbVars>
                              <esbToBpmVars>
                                        <mapping bpm="somme" esb="somme"></mapping>
                              </esbToBpmVars>
                    </action>
                    <transition to="fin" name="tofin">
                    </transition>
          </node>
          <end-state name="fin"></end-state>
</process-definition>

the java code :

     JbpmConfiguration jbpmConfiguration = JbpmConfiguration.getInstance(); 
     JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();

     GraphSession graphSession = jbpmContext.getGraphSession();
     ProcessDefinition processDefinition =
                    graphSession.findLatestProcessDefinition("calcule");

     String a = request.getParameter("a");
     String b = request.getParameter("b");

     ProcessInstance processInstance = new ProcessInstance(processDefinition);
     Token token = processInstance.getRootToken();
     System.out.println(token.getNode().getName());

     ContextInstance contextInstance = processInstance.getContextInstance();
     contextInstance.setVariable("a", new Float(500));
     contextInstance.setVariable("b", new Float(500));

     processInstance.getRootToken().signal();

is there anything that i messed ?

for information i am using jboss-esb4.9,  jbpm 3.2  and jbossAS 5.1.0GA

thank you for your help

Cheers

hi Andre Skusa,

I am facing similar issues on how to callback jbpm from esb, when the bpm process stops at a state.  Basically i want to do a state machine.  I tried to use the action method to call back jbpm, however i couldn't figure out how to make the EPR as mentioned by you in this post.

                <action name="continue_process_instance" class="org.jboss.soa.esb.services.jbpm.actions.JBpmCallback">

                </action>

Would it be possible to share some code samples on this?

Many thanks.

You said - "So, there are two parts of the message body, messageContent and settingsESB, which are mapped into the jBPM context. This works fine, the bpm-Objects are existing within jBPM". How do you understood this? I mean how can i get this objects in jBPM process(in ActionHandler for example).