How to properly declare, change and use workflow process variables?

anon26949 — Wed, 15 Feb 2017 07:47:17 GMT

Based on the example kindly provided by Mr. Potts, I've developed the system of the contracts approval.Business process in BPMN notation is presented below.By Activiti Eclipse BPMN 2.0 Designer:The scheme of a running business process in Alfrescon my local computer installed:Alfresco Share v5.2.d(

Re: How to properly declare, change and use workflow process variables?

afaust — Wed, 15 Feb 2017 19:13:38 GMT

Ok - there are a few things to put straight here.

1) The statement about the "underlying JavaScript engine" having changed in 5.0.d has to be taken with a grain of salt. It depends on how you are using scripts within an Activiti workflow. The scriptTask just uses JSR-223 API to execute scripts and because 5.0.d now runs on Java 8 instead of Java 7, the default implementation for JSR-223 API has changed to Nashorn. If you instead use a regular serviceTask and the AlfrescoScriptDelegate class, then that will still use Rhino just like the task and execution listener classes do.

2) Execution of the following script inside a script task does not initialise anything:

var scwf_approveCount = 0; var scwf_tpApproved = false;‍

What this does is define a local variable that is set to a specific value and when the script completes it is just forgotten again.

The correct way to go is the last of your examples:

execution.setVariable('scwf_approveCount', 0); execution.setVariable('scwf_tpApproved', false);‍

3) In order to get any meaningful help on this platform it would be necessary / appreciated if you could attach the files that relate to your workflow - at least your BPMN and data model. You mixed a couple of things together when describing your issue(s) and the source would really clear up any confusion that may have arisen from the description...

Re: How to properly declare, change and use workflow process variables?

anon26949 — Thu, 16 Feb 2017 02:48:08 GMT

Thank you very much for your answer! This information is very important to me, you really helped me to understand. Now I will add the relevant information to the question.

It seems to me very strange that only one of the groups can approve / reject a contract. Then when another group tries to do something - a pop-up appears with this error.

Re: How to properly declare, change and use workflow process variables?

anon26949 — Thu, 16 Feb 2017 03:18:42 GMT

For creating activiti diagrams I used Activiti Eclipse BPMN 2.0 Designer 5.18. Here is a description of the process that was generated by this plug-in:

<?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="contractsApproval" name="Contracts Approval" isExecutable="true">
    <startEvent id="startevent1" name="Start" activiti:formKey="scwf:submitReviewTask"></startEvent>
    <endEvent id="endevent1" name="End"></endEvent>
    <userTask id="usertask1" name="Approval of the first group" activiti:candidateGroups="GROUP_First" activiti:formKey="scwf:activitiFirstReview">
      <extensionElements>
        <activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
          <activiti:field name="script">
            <activiti:string><![CDATA[if(task.getVariableLocal('scwf_approveRejectOutcome') == 'Approve') {
                            var newApprovedCount = scwf_approveCount + 1;
                            execution.setVariable('scwf_approveCount', newApprovedCount);
                        }]]></activiti:string>
          </activiti:field>
        </activiti:taskListener>
      </extensionElements>
    </userTask>
    <userTask id="usertask3" name="Revise" activiti:assignee="${initiator.properties.userName}" activiti:formKey="scwf:activitiRevise">
      <extensionElements>
        <activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
          <activiti:field name="script">
            <activiti:string><![CDATA[if(task.getVariableLocal('scwf_reviseOutcome') == 'Re-submit') {
                    execution.setVariable('scwf_resubmit', true);
                    } else {
                    execution.setVariable('scwf_resubmit', false);
                    }]]></activiti:string>
          </activiti:field>
        </activiti:taskListener>
      </extensionElements>
    </userTask>
    <userTask id="usertask4" name="Approval of the second group" activiti:candidateGroups="GROUP_Second" activiti:formKey="scwf:activitiSecondReview">
      <extensionElements>
        <activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
          <activiti:field name="script">
            <activiti:string><![CDATA[if(task.getVariableLocal('scwf_approveRejectOutcome') == 'Approve') {
                            var newApprovedCount = scwf_approveCount + 1;
                            execution.setVariable('scwf_approveCount', newApprovedCount);
                        }
        ]]></activiti:string>
          </activiti:field>
        </activiti:taskListener>
      </extensionElements>
    </userTask>
    <serviceTask id="scripttask1" name="Send a document for approval" activiti:class="org.alfresco.repo.workflow.activiti.script.AlfrescoScriptDelegate">
      <extensionElements>
        <activiti:field name="runAs">
          <activiti:string><![CDATA[admin]]></activiti:string>
        </activiti:field>
        <activiti:field name="script">
          <activiti:string><![CDATA[execution.setVariable('scwf_approveCount', 0);
            execution.setVariable('scwf_tpApproved', false);]]></activiti:string>
        </activiti:field>
      </extensionElements>
    </serviceTask>
    <parallelGateway id="parallelgateway1" name="Parallel Gateway"></parallelGateway>
    <parallelGateway id="parallelgateway2" name="Parallel Gateway"></parallelGateway>
    <exclusiveGateway id="exclusivegateway1" name="Exclusive Gateway"></exclusiveGateway>
    <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="scripttask1"></sequenceFlow>
    <sequenceFlow id="flow2" sourceRef="scripttask1" targetRef="parallelgateway1"></sequenceFlow>
    <sequenceFlow id="flow3" sourceRef="parallelgateway1" targetRef="usertask1"></sequenceFlow>
    <sequenceFlow id="flow4" sourceRef="parallelgateway1" targetRef="usertask4"></sequenceFlow>
    <sequenceFlow id="flow5" sourceRef="usertask1" targetRef="parallelgateway2"></sequenceFlow>
    <sequenceFlow id="flow6" sourceRef="usertask4" targetRef="parallelgateway2"></sequenceFlow>
    <sequenceFlow id="flow7" sourceRef="parallelgateway2" targetRef="exclusivegateway1"></sequenceFlow>
    <sequenceFlow id="flow9" sourceRef="exclusivegateway1" targetRef="usertask3">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${scwf_approveCount < 2}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow13" sourceRef="usertask3" targetRef="scripttask1">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${scwf_resubmit == true}]]></conditionExpression>
    </sequenceFlow>
    <userTask id="usertask5" name="Approved Notification" activiti:assignee="${initiator.properties.userName}" activiti:formKey="scwf:activitiApprovedNotification">
      <extensionElements>
        <activiti:taskListener event="create" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
          <activiti:field name="script">
            <activiti:string><![CDATA[var setWebFlagAction = actions.create("set-web-flag");
                        setWebFlagAction.parameters["active"] = true;
                        for (var i = 0; i < bpm_package.children.length; i++) {
                            logger.log("Approving node:" + bpm_package.children[i].nodeRef);
                            setWebFlagAction.execute(bpm_package.children[i]);
                        }]]></activiti:string>
          </activiti:field>
        </activiti:taskListener>
      </extensionElements>
    </userTask>
    <sequenceFlow id="flow15" sourceRef="usertask5" targetRef="endevent1"></sequenceFlow>
    <sequenceFlow id="flow16" sourceRef="usertask3" targetRef="endevent1">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${scwf_resubmit == false}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow17" sourceRef="exclusivegateway1" targetRef="usertask5"></sequenceFlow>
  </process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_contractsApproval">
    <bpmndi:BPMNPlane bpmnElement="contractsApproval" id="BPMNPlane_contractsApproval">
      <bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">
        <omgdc:Bounds height="35.0" width="35.0" x="0.0" y="163.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
        <omgdc:Bounds height="35.0" width="35.0" x="790.0" y="164.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="usertask1" id="BPMNShape_usertask1">
        <omgdc:Bounds height="75.0" width="105.0" x="330.0" y="96.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="usertask3" id="BPMNShape_usertask3">
        <omgdc:Bounds height="55.0" width="105.0" x="310.0" y="360.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="usertask4" id="BPMNShape_usertask4">
        <omgdc:Bounds height="78.0" width="105.0" x="330.0" y="193.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="scripttask1" id="BPMNShape_scripttask1">
        <omgdc:Bounds height="89.0" width="121.0" x="60.0" y="136.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="parallelgateway1" id="BPMNShape_parallelgateway1">
        <omgdc:Bounds height="40.0" width="40.0" x="230.0" y="162.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="parallelgateway2" id="BPMNShape_parallelgateway2">
        <omgdc:Bounds height="40.0" width="40.0" x="480.0" y="160.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="exclusivegateway1" id="BPMNShape_exclusivegateway1">
        <omgdc:Bounds height="40.0" width="40.0" x="568.0" y="160.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="usertask5" id="BPMNShape_usertask5">
        <omgdc:Bounds height="68.0" width="105.0" x="640.0" y="147.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
        <omgdi:waypoint x="35.0" y="180.0"></omgdi:waypoint>
        <omgdi:waypoint x="60.0" y="180.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">
        <omgdi:waypoint x="181.0" y="180.0"></omgdi:waypoint>
        <omgdi:waypoint x="230.0" y="182.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3">
        <omgdi:waypoint x="250.0" y="162.0"></omgdi:waypoint>
        <omgdi:waypoint x="250.0" y="137.0"></omgdi:waypoint>
        <omgdi:waypoint x="330.0" y="133.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow4" id="BPMNEdge_flow4">
        <omgdi:waypoint x="250.0" y="202.0"></omgdi:waypoint>
        <omgdi:waypoint x="250.0" y="233.0"></omgdi:waypoint>
        <omgdi:waypoint x="330.0" y="232.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow5" id="BPMNEdge_flow5">
        <omgdi:waypoint x="435.0" y="133.0"></omgdi:waypoint>
        <omgdi:waypoint x="500.0" y="137.0"></omgdi:waypoint>
        <omgdi:waypoint x="500.0" y="160.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow6" id="BPMNEdge_flow6">
        <omgdi:waypoint x="435.0" y="232.0"></omgdi:waypoint>
        <omgdi:waypoint x="500.0" y="233.0"></omgdi:waypoint>
        <omgdi:waypoint x="500.0" y="200.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow7" id="BPMNEdge_flow7">
        <omgdi:waypoint x="520.0" y="180.0"></omgdi:waypoint>
        <omgdi:waypoint x="568.0" y="180.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow9" id="BPMNEdge_flow9">
        <omgdi:waypoint x="588.0" y="200.0"></omgdi:waypoint>
        <omgdi:waypoint x="362.0" y="360.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow13" id="BPMNEdge_flow13">
        <omgdi:waypoint x="362.0" y="360.0"></omgdi:waypoint>
        <omgdi:waypoint x="120.0" y="225.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow15" id="BPMNEdge_flow15">
        <omgdi:waypoint x="745.0" y="181.0"></omgdi:waypoint>
        <omgdi:waypoint x="790.0" y="181.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow16" id="BPMNEdge_flow16">
        <omgdi:waypoint x="415.0" y="387.0"></omgdi:waypoint>
        <omgdi:waypoint x="598.0" y="387.0"></omgdi:waypoint>
        <omgdi:waypoint x="807.0" y="199.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow17" id="BPMNEdge_flow17">
        <omgdi:waypoint x="608.0" y="180.0"></omgdi:waypoint>
        <omgdi:waypoint x="640.0" y="181.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Here is the workflow content model:

<?xml version="1.0" encoding="UTF-8"?>
<!-- Definition of new Model -->
<model name="scwf:workflowModel" xmlns="http://www.alfresco.org/model/dictionary/1.0">
    <!-- Optional meta-data about the model -->    
    <description>...</description>    
    <author>...</author>    
    <version>...</version>

    <!-- Imports are required to allow references to definitions in other models -->    
    <imports>        
       <import uri="http://www.alfresco.org/model/dictionary/1.0" prefix="d" />        
       <import uri="http://www.alfresco.org/model/bpm/1.0" prefix="bpm" />    
    </imports>

    <!-- Introduction of new namespaces defined by this model -->    
    <namespaces>        
       <namespace uri="http://.../model/workflow/1.0" prefix="scwf" />    
    </namespaces>

    <types>            
       <type name="scwf:submitReviewTask">            
          <parent>bpm:startTask</parent>        
    </type>            
    <type name="scwf:activitiFirstReview">            
       <parent>scwf:activitiReviewTask</parent>        
    </type>

    <type name="scwf:activitiSecondReview">            
       <parent>scwf:activitiReviewTask</parent>
    </type>

    <type name="scwf:activitiRevise">            
       <parent>bpm:activitiOutcomeTask</parent>            
       <properties>                
          <property name="scwf:reviseOutcome">                    
             <type>d:text</type>                    
             <default>Abort</default>                    
             <constraints>                        
                <constraint type="LIST">                            
                   <parameter name="allowedValues">                                
                      <list>                                    
                         <value>Re-submit</value>
                         <value>Abort</value>                                
                      </list>                            
                   </parameter>                        
                </constraint>                    
              </constraints>                
           </property>            
       </properties>                           
       <overrides>                
          <property name="bpm:packageItemActionGroup">                    
             <default>edit_package_item_actions</default>                
          </property>                
          <property name="bpm:outcomePropertyName">                    
             <default>{http://.../model/workflow/1.0}reviseOutcome</default>                
           </property>            
       </overrides>        
     </type>
     <type name="scwf:activitiReviewTask">            
        <parent>bpm:activitiOutcomeTask</parent>            
        <properties>                
           <property name="scwf:approveRejectOutcome">                    
              <type>d:text</type>                    
              <default>Reject</default>                    
              <constraints>                        
                 <constraint type="LIST">                            
                    <parameter name="allowedValues">                                
                       <list>
                          <value>Approve</value>                                    
                          <value>Reject</value>       
                       </list>                            
                    </parameter>      
                  </constraint>                    
              </constraints>                
            </property>            
         </properties>                           
       <overrides>                
          <property name="bpm:packageItemActionGroup">                    
             <default>read_package_item_actions</default>                
          </property>                
          <property name="bpm:outcomePropertyName">                    
             <default>{http://.../model/workflow/1.0}approveRejectOutcome</default>
          </property>            
       </overrides>        
     </type>

     <type name="scwf:activitiApprovedNotification">       
        <parent>bpm:workflowTask</parent>            
        <overrides>                
           <property name="bpm:packageItemActionGroup">      
               <default>read_package_item_actions</default>                
           </property>            
        </overrides>                    
     </type>    
  </types>
</model>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: How to properly declare, change and use workflow process variables?

anon26949 — Thu, 16 Feb 2017 06:52:55 GMT

vikash answered the question: How to properly declare, change and use workflow process variables?

topic Re: How to properly declare, change and use workflow process variables? in Alfresco Forum

How to properly declare, change and use workflow process variables?

Re: How to properly declare, change and use workflow process variables?

Re: How to properly declare, change and use workflow process variables?

Re: How to properly declare, change and use workflow process variables?

Re: How to properly declare, change and use workflow process variables?