Cannot load Java Program specified in a Service Task

As we transition to the new Hyland Community, some post links may be temporarily disrupted as we finalize redirects. We apologize for the inconvenience and are working to resolve this as quickly as possible. Details.

ct1

I am unable to use a Java program to implement a service task in Explorer.

I defined the class below to be the service class of a service task on a process.  When I deployed and attempted to run the process in Explorer, I saw the exception shown below.  The exception shows that the class was found.  Eclipse confirms that the JavaDelegate that was implemented was the org.activiti.engine.delegate.JavaDelegate.

package com.argo.mobcont;

import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.delegate.JavaDelegate;
import org.activiti.engine.impl.javax.el.Expression;

public class CreditChecker implements JavaDelegate
{
   private Expression requestedAmountE;
   private Expression incomeAmountE;
   
   private boolean creditHistoryGood = false;
   
   public void execute(DelegateExecution execution)
   {
      System.out.println("execution id " + execution.getId());
      
      System.out.println("In CreditChecker.execute().");
   }
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

The bpmn20 file contained:

  <process id="CreditCheckProcess" name="CreditCheckProcess">
    <documentation>Place documentation for the 'CreditCheckProcess' process here.</documentation>
    <startEvent id="startevent1" name="Start"></startEvent>
    <serviceTask id="checkCreditHistory" name="Check credit history" activiti:class="com.argo.mobcont.CreditChecker"></serviceTask>
    <sequenceFlow id="flow1" name="" sourceRef="startevent1" targetRef="checkCreditHistory"></sequenceFlow>

‍‍‍‍‍‍‍‍

THE EXCEPTION:

Caused by: org.activiti.engine.ActivitiException: com.argo.mobcont.CreditChecker
doesn't implement org.activiti.engine.delegate.JavaDelegate nor org.activiti.en
gine.impl.pvm.delegate.ActivityBehavior
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.getActivityBehavio
rInstance(ClassDelegate.java:136)

ronald_van_kuij

Then there must be an older version on the classpath that does not implement the interface