activity - get service registry in java class

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dmralfing

Somebody could tell me what I´m doing wrong to get the service registry in the java class, or
well any way to get it? - I have tryed using the solution I read in the forum topic :
https://forums.alfresco.com/forum/developer-discussions/workflow/proper-way-implement-custom-tasklistener-activiti-02082012-1433
..but I´m afraid I´m doing something wrong due to I´m a beginer in activity, so I would apreciate if somebody help me..
This is the Java code:

<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="Examples">
  <process id="MyTest" name="MyTest">
   <startEvent id="theStart" name="Start">
   </startEvent>
    <serviceTask id="javaService" name="Java service invocation" activiti:class="org.activiti.examples.bpmn.test.manager2.SetterTest">
      <extensionElements>
        <activiti:field name="text">
          <activiti:string>Success</activiti:string>
        </activiti:field>
        <activiti:taskListener event="create" class="org.activiti.examples.bpmn.test.manager2.SetterTest">
        </activiti:taskListener>
      </extensionElements>
    </serviceTask>
   <userTask id="usertask1" name="User Task" activiti:candidateGroups="user"></userTask>
    
   <endEvent id="theEnd" name="End"></endEvent>
    <sequenceFlow id="flow1" name="" sourceRef="theStart" targetRef="javaService"></sequenceFlow>
    <sequenceFlow id="flow2" name="" sourceRef="javaService" targetRef="usertask1"></sequenceFlow>    
    <sequenceFlow id="flow4" name="" sourceRef="usertask1" targetRef="theEnd"></sequenceFlow>
  </process>
</definitions>
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..and this is my class that unaffortunately doesn´t get the serviceRegistry..

package org.activiti.examples.bpmn.test.manager2;
import …
……….
public class SetterTest implements JavaDelegate {
 
   private static final String VARIABLE_NAME = "testVariable";
   private Expression text;
   ServiceRegistry serviceRegistry=null;
   //public ServiceRegistry getServiceRegistry() {return serviceRegistry;}
   protected ServiceRegistry getServiceRegistry() {

        ProcessEngineConfigurationImpl config = Context.getProcessEngineConfiguration();
        if (config != null) {
            ServiceRegistry registry = (ServiceRegistry) config.getBeans().get(ActivitiConstants.SERVICE_REGISTRY_BEAN_KEY);
            if (registry == null) {
                throw new RuntimeException(
                            "Service-registry not present in ProcessEngineConfiguration beans, expected ServiceRegistry with key" + 
                            ActivitiConstants.SERVICE_REGISTRY_BEAN_KEY);
            }
            else
               System.out.println("————— config =null");
            return registry;
        }

        throw new IllegalStateException("No ProcessEngineCOnfiguration found in active context");

    }   
   public void setServiceRegistry(ServiceRegistry serviceRegistry) {this.serviceRegistry = serviceRegistry;}
   public void execute(DelegateExecution execution) 
   {
         if (serviceRegistry==null)
            System.out.println("serviceRegistry is null!!");
   }
}
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Thank you so much!

tonyrivet

Hi,

I think there are several problems here.

First of all, you should use your getServiceRegistry() method. The serviceRegistry attribute you are testing is never instanciated here.
Moreover, instead of using the

activiti:class‍

attribute, I'll recommand you to declare your delegate as a bean, inject the services you need, and reference this bean in your serviceTask via the

activiti:delegateExpression‍

attribute (see the Activiti guide for more information).

Secondly, you are using the same class for your serviceTask delegate and your taskListener, which are two different things. The taskListener class should be a different one, implementing the

org.activiti.engine.delegate.TaskListener‍

interface.