how to deploy java implementations for service tasks to BPM Suite workbench?

[wangjianwu]

My business process has a service task that calls a java function. I implemented my java object for this service task. but I don't know how to deploy it BPM Suite workbench (web portal).

For instance, I found a service implementation at jboss-bpms-brms-6.0.1.GA-redhat-4-src/jbpm/jbpm-examples/src/main/java/org/jbpm/examples/junit/HelloService.java. How can I deploy its compiled code to BPM Suite workbench? Where should the class be copied to? I tried copy the jar directly to my BPM Suite installation directory (jboss-eap-6.1/standalone/deployments/...) from command line. I also tried do it from workbench (Authoring->Artifact Repository->Upload). None of them works.

I got the following error when trying to run a process with a service task and see the following error on console. I'm not sure it is because my service implementation class was not found or general Service Task configuration is wrong.

Please help. Thanks!

15:40:09,781 WARN  [org.drools.persistence.SingleSessionCommandService] (http-localhost/127.0.0.1:8080-4) Could not commit session: org.jbpm.workflow.instance.WorkflowRuntimeException: [ServiceProcess:2 - Hello:2] -- Could not find work item handler for Service Task

  at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:161) [jbpm-flow-6.0.2-redhat-6.jar:6.0.2-redhat-6]

  at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:337) [jbpm-flow-6.0.2-redhat-6.jar:6.0.2-redhat-6]

  at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:296) [jbpm-flow-6.0.2-redhat-6.jar:6.0.2-redhat-6]

  at org.jbpm.workflow.instance.node.StartNodeInstance.triggerCompleted(StartNodeInstance.java:66) [jbpm-flow-6.0.2-redhat-6.jar:6.0.2-redhat-6]

  at org.jbpm.workflow.instance.node.StartNodeInstance.internalTrigger(StartNodeInstance.java:43) [jbp

[eschabell]

You are going to want to ask this in the Customer Portal.

[krisverlaenen]

First of all you need your Java class available on the server.  Usually, this is achieved by uploading the jar to artefact repo in business central and adding a dependency to this jar in your project (but other alternatives like adding it to your project itself, or adding it to the server classpath are possible as well).

Second of all, you need to register a handler for "Service Task", you could do this at the server level, by editing

jboss-eap-6.1\standalone\deployments\business-central.war\WEB-INF\classes\META-INF\CustomWorkItemHandlers.conf, adding

"Service Task" : new org.jbpm.process.workitem.bpmn2.ServiceTaskHandler(ksession)

The error you are seeing seems to be because the second step seems to be missing.