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Listeners do not work on Boundary Timer Event

dinesh_babu_p

In our project, we have a requirement of taking an auto-decision for a user task if the user is not closing this task in the given duration.

Technical implementation will have a user task and a timer boundary event attached to it. In order to cancel the user task upon timer expiry, below settings have been made(Cancel activity has been turned on).

The below flow works fine as long as there are no execution listeners(or invoking any java class through java service task) after timer boundary event, else an exception is thrown in the timer job and the error is :

“could not instantiate the class(the class invoked in execution listener of service/user task or any sequence flow which are called after timer boundary event)”.

Please note the same user task is at the beginning of the flow, and we are able to execute it’s listener successfully. After timer boundary event is fired, somehow the execution context is lost or not being supported.

Regarding process engine configuration, turning ‘JobExecutorActivate’ on is not making any difference , so it has been turned off and settings in the attached document has been followed.

<?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

mgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns

mgdi="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="myProcess" name="My process" isExecutable="true">
<startEvent id="startevent1" name="Start">
<extensionElements>
<activiti:formProperty id="approval" name="Approval" type="string" default="Yes"></activiti:formProperty>
<activiti:formProperty id="taskId" name="TaskId" type="string"></activiti:formProperty>
</extensionElements>
</startEvent>
<userTask id="usertask4" name="Request Refund" activiti:assignee="kermit">
<extensionElements>
<activiti:formProperty id="employee" name="Employee" type="string" required="true"></activiti:formProperty>
<activiti:formProperty id="amount" name="Amount" type="long" required="true"></activiti:formProperty>
<activiti:formProperty id="motivation" name="Motivation" type="string" required="true"></activiti:formProperty>
<activiti:taskListener event="assignment" class="com.ms.msviz.activiti.workflow.servicetask.UserTaskJavaServiceTask"></activiti:taskListener>
</extensionElements>
</userTask>
<sequenceFlow id="flow13" sourceRef="startevent1" targetRef="usertask4"></sequenceFlow>
<userTask id="usertask5" name="Handle Request" activiti:assignee="kermit">
<extensionElements>
<activiti:taskListener event="create" class="com.ms.msviz.activiti.workflow.servicetask.UserTaskCompletionJavaServiceTask"></activiti:taskListener>
</extensionElements>
</userTask>
<sequenceFlow id="flow14" sourceRef="usertask4" targetRef="usertask5"></sequenceFlow>
<boundaryEvent id="boundarytimer1" name="Timer" attachedToRef="usertask5" cancelActivity="false">
<timerEventDefinition>
<timeCycle>0 0/1 * * * ?</timeCycle>
</timerEventDefinition>
</boundaryEvent>
<serviceTask id="mailtask1" name="Mail Task" activiti:type="mail">
<extensionElements>
<activiti:field name="to">
<activiti:string><![CDATA[xxx@ms.com]]></activiti:string>
</activiti:field>
<activiti:field name="subject">
<activiti:string><![CDATA[Timer Testing]]></activiti:string>
</activiti:field>
<activiti:field name="text">
<activiti:string><![CDATA[Check]]></activiti:string>
</activiti:field>
</extensionElements>
</serviceTask>
<sequenceFlow id="flow15" sourceRef="boundarytimer1" targetRef="mailtask1"></sequenceFlow>
<boundaryEvent id="boundarytimer2" name="Timer" attachedToRef="usertask5" cancelActivity="true">
<timerEventDefinition>
<timeDuration>PT2M</timeDuration>
</timerEventDefinition>
</boundaryEvent>
<endEvent id="endevent1" name="End"></endEvent>
<sequenceFlow id="flow16" sourceRef="usertask5" targetRef="endevent1"></sequenceFlow>
<userTask id="usertask6" name="Request Refund1">
<extensionElements>
<activiti:taskListener event="assignment" class="com.ms.msviz.activiti.workflow.servicetask.UserTaskJavaServiceTask"></activiti:taskListener>
</extensionElements>
</userTask>
<sequenceFlow id="flow17" sourceRef="boundarytimer2" targetRef="usertask6"></sequenceFlow>
<sequenceFlow id="flow18" sourceRef="usertask6" targetRef="endevent1"></sequenceFlow>
</process>
<bpmndi:BPMNDiagram id="BPMNDiagram_myProcess">
<bpmndi:BPMNPlane bpmnElement="myProcess" id="BPMNPlane_myProcess">
<bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">
<omgdc:Bounds height="35.0" width="35.0" x="30.0" y="161.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="usertask4" id="BPMNShape_usertask4">
<omgdc:Bounds height="55.0" width="105.0" x="100.0" y="150.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="usertask5" id="BPMNShape_usertask5">
<omgdc:Bounds height="55.0" width="105.0" x="250.0" y="150.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="boundarytimer1" id="BPMNShape_boundarytimer1">
<omgdc:Bounds height="30.0" width="30.0" x="270.0" y="190.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="mailtask1" id="BPMNShape_mailtask1">
<omgdc:Bounds height="55.0" width="105.0" x="232.0" y="250.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="boundarytimer2" id="BPMNShape_boundarytimer2">
<omgdc:Bounds height="30.0" width="30.0" x="325.0" y="190.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
<omgdc:Bounds height="35.0" width="35.0" x="400.0" y="160.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="usertask6" id="BPMNShape_usertask6">
<omgdc:Bounds height="55.0" width="105.0" x="380.0" y="230.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNEdge bpmnElement="flow13" id="BPMNEdge_flow13">
<omgdi:waypoint x="65.0" y="178.0"></omgdi:waypoint>
<omgdi:waypoint x="100.0" y="177.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow14" id="BPMNEdge_flow14">
<omgdi:waypoint x="205.0" y="177.0"></omgdi:waypoint>
<omgdi:waypoint x="250.0" y="177.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow15" id="BPMNEdge_flow15">
<omgdi:waypoint x="285.0" y="220.0"></omgdi:waypoint>
<omgdi:waypoint x="284.0" y="250.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow16" id="BPMNEdge_flow16">
<omgdi:waypoint x="355.0" y="177.0"></omgdi:waypoint>
<omgdi:waypoint x="400.0" y="177.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow17" id="BPMNEdge_flow17">
<omgdi:waypoint x="355.0" y="205.0"></omgdi:waypoint>
<omgdi:waypoint x="432.0" y="230.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow18" id="BPMNEdge_flow18">
<omgdi:waypoint x="432.0" y="230.0"></omgdi:waypoint>
<omgdi:waypoint x="417.0" y="195.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
</bpmndi:BPMNPlane>
</bpmndi:BPMNDiagram>
</definitions>

<bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
<property name="deploymentResources" value="classpath*: src/main/resources/ActivitiDeployment.bpmn" />
<property name="dataSource" ref="dataSource" />
<property name="transactionManager" ref="transactionManager" />
<property name="databaseSchemaUpdate" value="true" />

<!– <property name="jobExecutorActivate" value="true" /> –>
<property name="asyncExecutorEnabled" value="true" />
<property name="asyncExecutorActivate" value="true" />

<property name="enableDatabaseEventLogging" value="true" />
<property name="mailServerHost" value="xxx.ms.com" />
<property name="mailServerDefaultFrom" value="xxx@ms.com" />
</bean>

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Comments

martin_grofcik

Hi Dinesh.

You can create jUnit test for this case, but I would say that class is missing in the classpath. Is class in the classpath?

Regards
Martin

dinesh_babu_p

Hi martin,

Yes, the CLASS is in the classpath and also, if I call any Listener class before TIMER it is able to execute the listener.
Only when it comes after the TImer which has "CancelActivity = true" it fails to instantiate the class on the listener

martin_grofcik

already answered.

sadiasher

I am also facing this type of issue, my class is on classpath but still cannot found after timer executes.