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timer events [SOLVED]

jmuras

Hi,

I try to create workflow that would send e-mails reminding about some task. I have created the following workflow:

<blockcode>

<?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://alfresco.org">

    <process id="icmrSubmissionWorkflow" name="ICMR Artefact Submission Process" isExecutable="true">

        <startEvent id="start" activiti:formKey="icmrWf:submitArtefactTask"></startEvent>

        <sequenceFlow id="flow1" sourceRef="start" targetRef="reviewTask"></sequenceFlow>

        <userTask id="reviewTask" name="Review Task" activiti:formKey="icmrWf:reviewTask">
            <extensionElements>

                <!– Set canditate group for the task –>
                <activiti:taskListener event="create" class="ie.icmr.tacitknowledge.CandidateListener" />

                <activiti:taskListener event="create" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
                    <activiti:field name="script">
                        <activiti:string>
                            if (typeof bpm_workflowPriority != 'undefined') task.priority = bpm_workflowPriority;
                        </activiti:string>
                    </activiti:field>
                </activiti:taskListener>

                <activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
                    <activiti:field name="script">
                        <activiti:string>
                            execution.setVariable('icmrWf_reviewOutcome', task.getVariable('icmrWf_reviewOutcome'));
                        </activiti:string>
                    </activiti:field>
                </activiti:taskListener>

            </extensionElements>

        </userTask>

        <sequenceFlow id="flow2" sourceRef="reviewTask" targetRef="reviewDecision"></sequenceFlow>

        <exclusiveGateway id="reviewDecision" name="Review Decision"></exclusiveGateway>

        <sequenceFlow id="flow3" sourceRef="reviewDecision" targetRef="approved">
            <conditionExpression xsi:type="tFormalExpression"><![CDATA[${icmrWf_reviewOutcome == 'Approve'}]]></conditionExpression>
        </sequenceFlow>

        <sequenceFlow id="flow4" sourceRef="reviewDecision" targetRef="rejected"></sequenceFlow>

        <userTask id="approved" name="Document Approved" activiti:assignee="${initiator.exists() ? initiator.properties.userName : 'admin'}" activiti:formKey="icmrWf:approvedTask">
            <documentation>The document was reviewed and approved.</documentation>
            <extensionElements>

                <activiti:taskListener event="create" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
                    <activiti:field name="script">
                        <activiti:string>
                            if (typeof bpm_workflowPriority != 'undefined') task.priority = bpm_workflowPriority;
                        </activiti:string>
                    </activiti:field>
                </activiti:taskListener>

                <activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
                    <activiti:field name="script">
                        <activiti:string>
                            execution.setVariable('bpm_assignee', person);
                        </activiti:string>
                    </activiti:field>
                </activiti:taskListener>

            </extensionElements>
        </userTask>

        <userTask id="rejected" name="Document Rejected" activiti:assignee="${initiator.exists() ? initiator.properties.userName : 'admin'}" activiti:formKey="icmrWf:rejectedTask">
            <documentation>The document was reviewed and rejected.</documentation>
            <extensionElements>

                <activiti:taskListener event="create" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
                    <activiti:field name="script">
                        <activiti:string>
                            if (typeof bpm_workflowPriority != 'undefined') task.priority = bpm_workflowPriority;
                        </activiti:string>
                    </activiti:field>
                </activiti:taskListener>

                <activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
                    <activiti:field name="script">
                        <activiti:string>
                            execution.setVariable('bpm_assignee', person);
                        </activiti:string>
                    </activiti:field>
                </activiti:taskListener>

            </extensionElements>
        </userTask>

        <sequenceFlow id="flow5" sourceRef="approved" targetRef="end"></sequenceFlow>

        <sequenceFlow id="flow6" sourceRef="rejected" targetRef="end"></sequenceFlow>

        <endEvent id="end"></endEvent>

        <boundaryEvent id="timer" name="Timer" attachedToRef="reviewTask" cancelActivity="true">
            <timerEventDefinition>
                <!– Fire remainder every monday at 8 am –>
                <!–<timeCycle>0 0 8 ? * MON</timeCycle>–>
                <!–<timeCycle>0 * * ? * *</timeCycle>–>
                <timeDuration>PT2M</timeDuration>
            </timerEventDefinition>
        </boundaryEvent>

        <serviceTask id="mailtask" name="Email Reminder" activiti:class="org.alfresco.repo.workflow.activiti.script.AlfrescoScriptDelegate">
            <extensionElements>
                <activiti:field name="script">
                    <activiti:string>
                        logger.log("Send e-mail");
                    </activiti:string>
                </activiti:field>
            </extensionElements>
        </serviceTask>

        <sequenceFlow id="flow7" sourceRef="timer" targetRef="mailtask"></sequenceFlow>

        <sequenceFlow id="flow8" sourceRef="mailtask" targetRef="reviewDecision"></sequenceFlow>

    </process>

    <bpmndi:BPMNDiagram id="BPMNDiagram_icmrSubmissionWorkflow">
        <bpmndi:BPMNPlane bpmnElement="icmrSubmissionWorkflow" id="BPMNPlane_icmrSubmissionWorkflow">
            <bpmndi:BPMNShape bpmnElement="start" id="BPMNShape_start">
                <omgdc:Bounds height="35.0" width="35.0" x="30.0" y="200.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="reviewTask" id="BPMNShape_reviewTask">
                <omgdc:Bounds height="55.0" width="105.0" x="180.0" y="189.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="reviewDecision" id="BPMNShape_reviewDecision">
                <omgdc:Bounds height="40.0" width="40.0" x="570.0" y="196.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="approved" id="BPMNShape_approved">
                <omgdc:Bounds height="55.0" width="105.0" x="680.0" y="96.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="rejected" id="BPMNShape_rejected">
                <omgdc:Bounds height="55.0" width="105.0" x="680.0" y="295.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="end" id="BPMNShape_end">
                <omgdc:Bounds height="35.0" width="35.0" x="845.0" y="199.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="timer" id="BPMNShape_timer">
                <omgdc:Bounds height="30.0" width="30.0" x="250.0" y="229.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="mailtask" id="BPMNShape_mailtask">
                <omgdc:Bounds height="55.0" width="105.0" x="212.0" y="296.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
                <omgdi:waypoint x="65.0" y="217.0"></omgdi:waypoint>
                <omgdi:waypoint x="180.0" y="216.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">
                <omgdi:waypoint x="285.0" y="216.0"></omgdi:waypoint>
                <omgdi:waypoint x="570.0" y="216.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3">
                <omgdi:waypoint x="590.0" y="196.0"></omgdi:waypoint>
                <omgdi:waypoint x="590.0" y="123.0"></omgdi:waypoint>
                <omgdi:waypoint x="680.0" y="123.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="flow4" id="BPMNEdge_flow4">
                <omgdi:waypoint x="590.0" y="236.0"></omgdi:waypoint>
                <omgdi:waypoint x="590.0" y="323.0"></omgdi:waypoint>
                <omgdi:waypoint x="680.0" y="322.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="flow5" id="BPMNEdge_flow5">
                <omgdi:waypoint x="785.0" y="123.0"></omgdi:waypoint>
                <omgdi:waypoint x="862.0" y="123.0"></omgdi:waypoint>
                <omgdi:waypoint x="862.0" y="199.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="flow6" id="BPMNEdge_flow6">
                <omgdi:waypoint x="785.0" y="322.0"></omgdi:waypoint>
                <omgdi:waypoint x="862.0" y="323.0"></omgdi:waypoint>
                <omgdi:waypoint x="862.0" y="234.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="flow8" id="BPMNEdge_flow8">
                <omgdi:waypoint x="317.0" y="323.0"></omgdi:waypoint>
                <omgdi:waypoint x="589.0" y="322.0"></omgdi:waypoint>
                <omgdi:waypoint x="590.0" y="236.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="flow7" id="BPMNEdge_flow7">
                <omgdi:waypoint x="265.0" y="259.0"></omgdi:waypoint>
                <omgdi:waypoint x="264.0" y="296.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
        </bpmndi:BPMNPlane>
    </bpmndi:BPMNDiagram>
</definitions>

</blockcode>

Timer event is defined as

<boundaryEvent id="timer" name="Timer" attachedToRef="reviewTask" cancelActivity="true">
‍‍‍

Ideally I would like to run reminders every period of time, for example every minute:

<timeCycle>0 * * ? * *</timeCycle>
‍‍‍

But unfortunately it does not work and runs only once. I also tired to use subprocess, but without success. When I run timer only once with for example 2 minutes delay

<timeDuration>PT2M</timeDuration>
‍‍‍

'mailtask' runs 3 times. This happens also for timeCycle tag.

In addition, I get the following exception

Caused by: org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'icmrWf_reviewOutcome'

I know what causes that icmrWf_reviewOutcome variable is set only in reviewTask but where should I connect reminder branch back after mailtask is done. I tried to connect it back to timer, but then timer fires instantly. I tried not to connect it to anything but then workflow is being finished.

Did someone face similar issue? Any ideas how to deal with it?

Regards,
Joanna Muras

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Comments

jmuras

I solved the issue. I should have added cancelActivity="false" to timer task. It prevents original task (reviewTask) to be terminated when mailtask finishes. It is not necessary to connect mailtask to anything. Here is full workflow definition that would send periodic e-mail reminders.

<blockcode>
<?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://alfresco.org">

    <process id="icmrSubmissionWorkflow" name="ICMR Artefact Submission Process" isExecutable="true">

        <startEvent id="start" activiti:formKey="icmrWf:submitArtefactTask"></startEvent>

        <sequenceFlow id="flow1" sourceRef="start" targetRef="reviewTask"></sequenceFlow>

        <userTask id="reviewTask" name="Review Task" activiti:formKey="icmrWf:reviewTask">
            <extensionElements>

                <!– Set canditate group for the task - APPOVERS –>
                <activiti:taskListener event="create" class="ie.icmr.tacitknowledge.CandidateListener"/>

                <activiti:taskListener event="create"
                                       class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
                    <activiti:field name="script">
                        <activiti:string>
                            if (typeof bpm_workflowPriority != 'undefined') task.priority = bpm_workflowPriority;
                        </activiti:string>
                    </activiti:field>
                </activiti:taskListener>

                <activiti:taskListener event="complete"
                                       class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
                    <activiti:field name="script">
                        <activiti:string>
                            execution.setVariable('icmrWf_reviewOutcome', task.getVariable('icmrWf_reviewOutcome'));
                        </activiti:string>
                    </activiti:field>
                </activiti:taskListener>

            </extensionElements>

        </userTask>

        <sequenceFlow id="flow2" sourceRef="reviewTask" targetRef="reviewDecision"></sequenceFlow>

        <parallelGateway id="reviewDecision" name="Review Decision"></parallelGateway>

        <sequenceFlow id="flow3" sourceRef="reviewDecision" targetRef="approved">
            <conditionExpression xsi:type="tFormalExpression">
                <![CDATA[${icmrWf_reviewOutcome == 'Approve'}]]></conditionExpression>
        </sequenceFlow>

        <sequenceFlow id="flow4" sourceRef="reviewDecision" targetRef="rejected"></sequenceFlow>

        <userTask id="approved" name="Document Approved"
                  activiti:assignee="${initiator.exists() ? initiator.properties.userName : 'admin'}"
                  activiti:formKey="icmrWf:approvedTask">
            <documentation>The document was reviewed and approved.</documentation>
            <extensionElements>

                <activiti:taskListener event="create"
                                       class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
                    <activiti:field name="script">
                        <activiti:string>
                            if (typeof bpm_workflowPriority != 'undefined') task.priority = bpm_workflowPriority;
                        </activiti:string>
                    </activiti:field>
                </activiti:taskListener>

                <activiti:taskListener event="complete"
                                       class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
                    <activiti:field name="script">
                        <activiti:string>
                            execution.setVariable('bpm_assignee', person);
                        </activiti:string>
                    </activiti:field>
                </activiti:taskListener>

            </extensionElements>
        </userTask>

        <userTask id="rejected" name="Document Rejected"
                  activiti:assignee="${initiator.exists() ? initiator.properties.userName : 'admin'}"
                  activiti:formKey="icmrWf:rejectedTask">
            <documentation>The document was reviewed and rejected.</documentation>
            <extensionElements>

                <activiti:taskListener event="create"
                                       class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
                    <activiti:field name="script">
                        <activiti:string>
                            if (typeof bpm_workflowPriority != 'undefined') task.priority = bpm_workflowPriority;
                        </activiti:string>
                    </activiti:field>
                </activiti:taskListener>

                <activiti:taskListener event="complete"
                                       class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
                    <activiti:field name="script">
                        <activiti:string>
                            execution.setVariable('bpm_assignee', person);
                        </activiti:string>
                    </activiti:field>
                </activiti:taskListener>

            </extensionElements>
        </userTask>

        <sequenceFlow id="flow5" sourceRef="approved" targetRef="end"></sequenceFlow>

        <sequenceFlow id="flow6" sourceRef="rejected" targetRef="end"></sequenceFlow>

        <endEvent id="end"></endEvent>

        <boundaryEvent id="timer" name="Timer" attachedToRef="reviewTask" cancelActivity="false">
            <timerEventDefinition>
                <!– Fire remainder every monday at 8 am –>
                <!–<timeCycle>0 0 8 ? * MON</timeCycle>–>
                <timeCycle>0 * * ? * *</timeCycle>
            </timerEventDefinition>
        </boundaryEvent>

        <serviceTask id="mailtask" name="Email Reminder"
                     activiti:class="org.alfresco.repo.workflow.activiti.script.AlfrescoScriptDelegate">
            <extensionElements>
                <activiti:field name="script">
                    <activiti:string>
                        logger.log("Send e-mail");
                    </activiti:string>
                </activiti:field>
            </extensionElements>
        </serviceTask>

        <sequenceFlow id="flow7" sourceRef="timer" targetRef="mailtask"></sequenceFlow>

    </process>

    <bpmndi:BPMNDiagram id="BPMNDiagram_icmrSubmissionWorkflow">
        <bpmndi:BPMNPlane bpmnElement="icmrSubmissionWorkflow" id="BPMNPlane_icmrSubmissionWorkflow">
            <bpmndi:BPMNShape bpmnElement="start" id="BPMNShape_start">
                <omgdc:Bounds height="35.0" width="35.0" x="30.0" y="200.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="reviewTask" id="BPMNShape_reviewTask">
                <omgdc:Bounds height="55.0" width="105.0" x="180.0" y="189.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="reviewDecision" id="BPMNShape_reviewDecision">
                <omgdc:Bounds height="40.0" width="40.0" x="570.0" y="196.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="approved" id="BPMNShape_approved">
                <omgdc:Bounds height="55.0" width="105.0" x="680.0" y="96.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="rejected" id="BPMNShape_rejected">
                <omgdc:Bounds height="55.0" width="105.0" x="680.0" y="295.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="end" id="BPMNShape_end">
                <omgdc:Bounds height="35.0" width="35.0" x="845.0" y="199.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="timer" id="BPMNShape_timer">
                <omgdc:Bounds height="30.0" width="30.0" x="250.0" y="229.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="mailtask" id="BPMNShape_mailtask">
                <omgdc:Bounds height="55.0" width="105.0" x="212.0" y="296.0"></omgdc:Bounds>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
                <omgdi:waypoint x="65.0" y="217.0"></omgdi:waypoint>
                <omgdi:waypoint x="180.0" y="216.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">
                <omgdi:waypoint x="285.0" y="216.0"></omgdi:waypoint>
                <omgdi:waypoint x="570.0" y="216.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3">
                <omgdi:waypoint x="590.0" y="196.0"></omgdi:waypoint>
                <omgdi:waypoint x="590.0" y="123.0"></omgdi:waypoint>
                <omgdi:waypoint x="680.0" y="123.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="flow4" id="BPMNEdge_flow4">
                <omgdi:waypoint x="590.0" y="236.0"></omgdi:waypoint>
                <omgdi:waypoint x="590.0" y="323.0"></omgdi:waypoint>
                <omgdi:waypoint x="680.0" y="322.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="flow5" id="BPMNEdge_flow5">
                <omgdi:waypoint x="785.0" y="123.0"></omgdi:waypoint>
                <omgdi:waypoint x="862.0" y="123.0"></omgdi:waypoint>
                <omgdi:waypoint x="862.0" y="199.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="flow6" id="BPMNEdge_flow6">
                <omgdi:waypoint x="785.0" y="322.0"></omgdi:waypoint>
                <omgdi:waypoint x="862.0" y="323.0"></omgdi:waypoint>
                <omgdi:waypoint x="862.0" y="234.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="flow7" id="BPMNEdge_flow7">
                <omgdi:waypoint x="265.0" y="259.0"></omgdi:waypoint>
                <omgdi:waypoint x="264.0" y="296.0"></omgdi:waypoint>
            </bpmndi:BPMNEdge>
        </bpmndi:BPMNPlane>
    </bpmndi:BPMNDiagram>

</definitions>

</blockcode>

shreejitray

Hi jmuras_,

Your post was very helpful in solving my problem. However, I am having trouble figuring out how to set a time for the timercycle field. I went through the code and I understand we have 6 categories to chose from, namely { seconds, minutes, hours, daysofmonth, month,daysofweek} year is by default. Please help me understand how does 0**?** result in time interval of 1 minute.

You can reply to me at shreejitray@gmail.com

With regards

Shreejit Ray