Alfresco Workflow - multiple assignee and java code

Question

I'm trying to create a workflow that have multiple assignees (done) and launch to them, a task. When I start the workflow, I want to run a java code that makes modifications on file that the task has been assigned. How can I run this java code on "Start Workflow"?

And then, I want that each assignee have a task to approve (this moment, the assignees don't have task to approve, appear task done, how can I do that?), and to approve I want to run other java code. How can I make this ? Assign this java codes to workflow?

I don't know how to define bpmn too, I think some problems are because of this.

Answer 1

In order to run java code from your bpmn, you need to use java Listener classes. Listeners run on task events(create or complete ) or workflow events (start or end). These listeners need to be defined in your bpmn , and in your spring context file.

I ll give an example from my own code:

spring context file:

<bean id="StartTaskListener" class="com.crius.epub.wf.StartTaskListener" parent="activitiCreateTaskListener">
        </bean>
<bean id="StartTaskListener.activitiBeanRegistry" class="org.springframework.beans.factory.config.MethodInvokingFactoryBean" depends-on="activitiBeanRegistry">
    <property name="targetObject">
        <ref bean="activitiBeanRegistry" />
    </property>
    <property name="targetMethod" value="put" />
    <property name="arguments">
        <list>
            <value>StartTaskListener</value>
            <ref bean="StartTaskListener" />
        </list>
    </property>
</bean>

Similarly, you have to define CompleteTaskListener (runs at end of task), and ExecutionFlowListener (runs at begin and end of workflow)

In my bpmn, it looks like this

<?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:xsd="http://www.w3.org/2001/XMLSchema" 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="http://www.activiti.org/test">
  <process id="epubcreate" name="Create epub" isExecutable="true">
    <extensionElements>
      <activiti:executionListener event="end" delegateExpression="${ExecutionFlowListener}"></activiti:executionListener>
      <activiti:executionListener event="start" delegateExpression="${ExecutionFlowListener}"></activiti:executionListener>
    </extensionElements>
    <startEvent id="start" name="Start" activiti:initiator="initiatorUserName" activiti:formKey="epubwf:start"></startEvent>
    <userTask id="create" name="Create proof" activiti:assignee="${epubwf_creator.properties.userName}" activiti:formKey="epubwf:create">
      <extensionElements>
        <activiti:taskListener event="create" delegateExpression="${StartTaskListener}"></activiti:taskListener>
        <activiti:taskListener event="complete" delegateExpression="${CompleteTaskListener}"></activiti:taskListener>
      </extensionElements>
    </userTask>

An example of a Executionlistener class looks like this:

 public class ExecutionFlowListener  extends DelegateExecutionScriptBase implements ExecutionListener{

public void notify(DelegateExecution execution){
  ExecutionEntity executionEntity = (ExecutionEntity)execution;
  if ("start".equals(executionEntity.getActivityId())){
      // workflow has started
      // get value of property mymodel:myproperty
      Object assignees =  execution.getVariable("mymodel_myproperty");
  }  else if ((executionEntity.getTransition() != null && "end".equals(executionEntity.getTransition().getDestination().getId())) || "end".equals(execution.getEventName())){ 
     // workflow has ended
   }
 }

Hopefully this will get you started...