e2ebridge / bpmn Goto Github PK

Is it possible to get the bpmnId of a task inside the handler ?
Something link that ?

exports.mytask = function(data, done) {
  console.log(this.bpmnId);
  done(data);
};

Are the provided example bpmn files supposed to be viewable in any BPMN2.0 compatible modeler/viewer? I'm having trouble opening them.

bpmn.io gives no errors but draws no diagram.
camundaModeler gives a bunch of errors and draws no diagram.
Errors examples (on opening collaboration.bpmn):
feature 'label' not found
feature 'mxCell' not found
BPMNPlane not associated with collaboration
Element *N*: Diagram element not found, element will not be shown

Then there's yaoqiang, which does display a diagram, but warns that the xml is malformed and should be fixed.

What viewer/modeler can I use to open the example files?

Should I expect issues when creating new bpmn files with one of these modelers? (I'm planning on using bpmn-js/bpmn.io)

Hi,

I'm trying to use e2ebridge/bpmn in a meteorjs app to replace a BPM system previously written in Java (using Activiti).

I'm having some trouble as I want to use Meteor's reactivity to show a task list from the MongoDB. All was going well but it seems that when I call taskDone it doesn't flush this to the database. Is there a way to force a persistency flush or to make the persistency more eager? If not, can you guide me as to modify the code to do it as this is becoming something for a deal-breaker and I'm under pressure on this project! Thanks,

Chris

Bpmn imports is not working...

Example

 <?xml version="1.0" encoding="UTF-8"?>
<bpmn:definitions id="ShipmentDefinitions"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://schema.omg.org/spec/BPMN/2.0 BPMN20.xsd"
  xmlns:bpmn="http://schema.omg.org/spec/BPMN/2.0"
  xmlns:camunda="http://sample.bpmn.camunda.com/"
  xmlns:xbpmn="http://bpmn.camunda.com/"
  xmlns:tns="http://sample.bpmn.camunda.com/"
  typeLanguage="http://www.w3.org/2001/XMLSchema"
  expressionLanguage="http://www.w3.org/1999/XPath"
  targetNamespace="http://sample.bpmn.camunda.com/">

  <!-- imports -->
  <bpmn:import namespace="http://sample.bpmn.camunda.com/"
               location="SampleService.xsd"
               importType="http://www.w3.org/2001/XMLSchema"/>
   ...

   <extensionElements>
    <camunda:formData>
        <camunda:formField
            id="firstname" label="Firstname" type="string">
            <camunda:validation>
               <camunda:constraint name="maxlength" config="25" />
               <camunda:constraint name="required" />
            </camunda:validation>
        </camunda:formField>
        <camunda:formField
            id="lastname" label="Lastname" type="string">
            <camunda:validation>
               <camunda:constraint name="maxlength" config="25" />
               <camunda:constraint name="required" />
            </camunda:validation>
        </camunda:formField>
        <camunda:formField
            id="dateOfBirth" label="Date of Birth" type="date" />
    </camunda:formData>
  </extensionElements>

  ...

parser is returning an error like:

The BPMN file contains 4 error(s).

Unbound namespace prefix: "bpmn:import"
Line: 15\nColumn: 147 Char: >
Unbound namespace prefix: "bpmn:extensionElements"
Line: 19
Column: 28
Char: >Unbound namespace prefix: "bpmn:extensionElements"
Line: 37 
Column: 30

I'm doing something wrong? or they are not supported actually?

The engine cannot find the Javascript file:

My process looks like this:

var bpmn = require("bpmn");
console.log("Start process")
bpmn.createUnmanagedProcess("bpmn/simpleRegistration.bpmn", function(err, myProcess) {
    // we start the process
    myProcess.triggerEvent("Start_registration");
});

$ ls -la bpmn
total 24
drwxr-xr-x 1 ieugen ieugen  184 aug 10 20:40 .
drwxr-xr-x 1 ieugen ieugen  186 aug 10 20:41 ..
-rw-r--r-- 1 ieugen ieugen 6511 aug 10 20:21 simpleRegistration.bpmn
-rw-r--r-- 1 ieugen ieugen  757 aug 10 20:22 simpleRegistration.js

$ node -v 
v2.2.1
$ npm -v
2.11.0

module.js:334
    throw err;
    ^
Error: Cannot find module 'bpmn/simpleRegistration.js'
    at Function.Module._resolveFilename (module.js:332:15)
    at Function.Module._load (module.js:282:25)
    at Module.require (module.js:361:17)
    at require (module.js:380:17)
    at Object.exports.getHandlerFromFile (/home/ieugen/contracte/gpec-event/gpec-event/node_modules/bpmn/lib/handler.js:72:12)
    at exports.createUnmanagedProcess (/home/ieugen/contracte/gpec-event/gpec-event/node_modules/bpmn/lib/public.js:36:28)
    at Object.<anonymous> (/home/ieugen/contracte/gpec-event/gpec-event/bpmn-sample.js:5:6)
    at Module._compile (module.js:426:26)
    at Object.Module._extensions..js (module.js:444:10)
    at Module.load (module.js:351:32)

I am trying to set properties in EXCLUSIVE GATEWAY events caught by below handler.

exports.defaultEventHandler = function(eventType, currentFlowObjectName, handlerName, reason, done) {
//Called, if no handler could be invoked.
console.log('defaultEventHandler ' + eventType + currentFlowObjectName);
this.setProperty('Date()','Date()');
done();
};

console says
defaultEventHandler callHandlerStateChange1

but the properties is not set the mongo database.
can you help me out? Please.

_BELOW CODE WORKS FINE_

Hi Team, first off CONGRATULATIONS for such a great project.
I would like to know if is there any plan to support Data Object elements? It would be really awesome for the engine since it allow to describe many technical topics on the model itself.

Looking forward to your feedback,
Best Regards, Rolando

Is there someone that could provide an example when we are facing to a "decision" scenario? I'm trying to understand where we should specify the decision process and how to trigger the next step. Thank you for your help

In the package.json, "mongodb": ">= 1.3.10", I think it is not better way to dependency,
generally, major version changes means API not compatible with previous version, now, we need to upgrade mongodb to 3.x, which is causing bpmn is not working.

looks like a typo

db connections are closed when a process is done and has no parent. This holds water when a process was launched via a bpmn 'call activity' which is where the notion of 'parent' exists. AFAIK collaborating processes don't seem to have any parent processes but they do have participants who may, and more often than not, are, still in a 'processing' state. Currently the connection to mongo is terminated when a processes ends if it doesn't have any parents. But since collaborating processes don't necessarily have to have parents the first one to complete will kill the connection to mongo. I may be doing something wrong here so if so please let me know. Otherwise, if this is a legitimate issue I'll fix and do a pull request.
Just let me know,
thanks.

I see that you can specify a global unhandled exception handler callback per process in your js file. If I model script exceptions as an intermediate error event in my bpmn file, is there a way to raise those events when the script error occurs? Would I use a try/catch and trigger the event manually? If so, how?

I am new to BPMN so hopefully I missed something in the docs.

Probably this is an stupid question, but how do I tell the engine that a task is done using the REST server?

Why there should be a 'JS' file specific to a process to contain handlers? If I design a new process do I need to create handlers for that process too?

Hi,
I have the following code:

var bpmnParser = require('bpmn/lib/parsing/definitions.js');
var processDefinition = bpmnParser.getBPMNDefinitions('./expenses_payment.bpmn');

and it returns a result like:

[ { bpmnId: '_Collaboration_3',
participants: [ [Object], [Object] ],
messageFlows: [],
isCollaborationDefinition: true } ]

The question is why this function always returns an array? I seen that in most of cases it always is
just one object.
There is a case when this fn. will return more than one object?

Regards.

Hi,

Not sure why, but I'm having processes getting stuck at converging parallel gateways. Is this a known problem? Is there anything can be done about it? I've attached the process diagram. The orders seem to get stuck occasionally in "Order Built" and "Doors Built". I've tried a few things to work around it thinking it might be to do with the combination of exclusive gateways and parallel ones (ideally I want an inclusive gateway - is that anywhere near available?) e.g. I inserted a "Doors Start" activity which just calls done and "Track Cut" etc. to join the exclusive gateways (I couldn't get exclusive gateways to join any other way).

Please help! I was SO pleased when I found a Javascript BPMN engine but I'm now getting ready to give up and just go back to using Activiti via REST!

Hi,
Please a question..

How can Implement assignee to the user tasks, how can associate a assignee name, to user tasks??

Best Regards.

This could help to propagate data through the process if it uses a defaultEventHandler. Or did I miss something?

Hi guys,

Trying to set up a simple BPMN as in this gist:
https://gist.github.com/darbio/ee2a25d951fdbbd93491cd220f706a35

The process won't progress from Send email to Create user.

I've tried a number of different definitions, including the simple Task.js and it's still not progressing with my code.

Cheers.

Hello,

Running a trivial sample, I get the following message:

$ node myprocess.js
[Error: The BPMN file '/.../myprocess.bpmn'. contains more than one process definition. Use 'createCollaboratingProcesses' instead of 'createProcess']
/..../myprocess.js:6
    myprocess.triggerEvent("MyStart");

However, the process definition contains a single process.
myprocess.bpmn | uploaded via ZenHub

I designed a workflow using Camunda's bpmn-io, which is a great Javascript/HTML designer/viewer. However the generated BPMN looks completely different than what you have in your samples. Here is an excerpt from both...

bpmn-io...

<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" id="sid-38422fae-e03e-43a3-bef4-bd33b32041b2" targetNamespace="http://bpmn.io/bpmn" exporter="http://bpmn.io" exporterVersion="0.10.1">
  <process id="Process_1" isExecutable="false">
    <startEvent id="StartEvent_1" name="MyStart">
      <outgoing>SequenceFlow_1</outgoing>
    </startEvent>
    <task id="Task_1" name="MyTask">
      <incoming>SequenceFlow_1</incoming>
      <outgoing>SequenceFlow_03hcm0h</outgoing>
    </task>
    <sequenceFlow id="SequenceFlow_1" name="" sourceRef="StartEvent_1" targetRef="Task_1" />
    <endEvent id="EndEvent_06zsuum" name="MyEnd">
      <incoming>SequenceFlow_03hcm0h</incoming>
    </endEvent>
    <sequenceFlow id="SequenceFlow_03hcm0h" sourceRef="Task_1" targetRef="EndEvent_06zsuum" />
  </process>
  <bpmndi:BPMNDiagram id="BpmnDiagram_1">
    <bpmndi:BPMNPlane id="BpmnPlane_1" bpmnElement="Process_1">
      <bpmndi:BPMNShape id="StartEvent_1_gui" bpmnElement="StartEvent_1">
        <omgdc:Bounds x="242" y="187" width="30" height="30" />
        <bpmndi:BPMNLabel>
          <omgdc:Bounds x="212" y="219" width="90" height="22" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="Task_1_gui" bpmnElement="Task_1">
        <omgdc:Bounds x="340" y="162" width="100" height="80" />
        <bpmndi:BPMNLabel>
          <omgdc:Bounds x="118.85714721679688" y="47" width="82.28570556640625" height="12" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge id="SequenceFlow_1_gui" bpmnElement="SequenceFlow_1">
        <omgdi:waypoint xsi:type="omgdc:Point" x="272" y="202" />
        <omgdi:waypoint xsi:type="omgdc:Point" x="340" y="202" />
        <bpmndi:BPMNLabel>
          <omgdc:Bounds x="225" y="140" width="90" height="20" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNShape id="EndEvent_06zsuum_di" bpmnElement="EndEvent_06zsuum">
        <omgdc:Bounds x="518" y="184" width="36" height="36" />
        <bpmndi:BPMNLabel>
          <omgdc:Bounds x="491" y="220" width="90" height="20" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge id="SequenceFlow_03hcm0h_di" bpmnElement="SequenceFlow_03hcm0h">
        <omgdi:waypoint xsi:type="omgdc:Point" x="440" y="202" />
        <omgdi:waypoint xsi:type="omgdc:Point" x="475" y="202" />
        <omgdi:waypoint xsi:type="omgdc:Point" x="475" y="202" />
        <omgdi:waypoint xsi:type="omgdc:Point" x="518" y="202" />
        <bpmndi:BPMNLabel>
          <omgdc:Bounds x="430" y="235" width="90" height="20" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

and comparatively the same sample with e2e's bpmn...

<bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:debugger="http://e2e.ch/bpmneditor/debugger">
  <bpmn:extensionElements>
    <debugger:position href="http://localhost:7261/grapheditor/debugger/position"/>
  </bpmn:extensionElements>
  <bpmn:process id="PROCESS_1">
    <bpmn:startEvent name="MyStart" label="MyStart" id="2">
      <mxCell style="shape=mxgraph.bpmn.none_start_event;verticalLabelPosition=bottom;verticalAlign=top;" vertex="1" parent="1">
        <mxGeometry x="91" y="91" width="40" height="40" as="geometry"/>
      </mxCell>
    </bpmn:startEvent>
    <bpmn:task name="MyTask" label="MyTask" id="3">
      <mxCell style="shape=mxgraph.bpmn.task;" vertex="1" parent="1">
        <mxGeometry x="240" y="81" width="140" height="60" as="geometry"/>
      </mxCell>
    </bpmn:task>
    <bpmn:sequenceFlow name="" sourceRef="2" targetRef="3" id="4">
      <mxCell style="endArrow=block;endFill=1;endSize=6;edgeStyle=orthogonalEdgeStyle" edge="1" parent="1" source="2" target="3">
        <mxGeometry x="1" y="1" as="geometry">
          <mxPoint as="sourcePoint"/>
          <mxPoint x="30" y="30" as="targetPoint"/>
        </mxGeometry>
      </mxCell>
    </bpmn:sequenceFlow>
    <bpmn:endEvent name="MyEnd" label="MyEnd" id="5">
      <mxCell style="shape=mxgraph.bpmn.none_end_event;verticalLabelPosition=bottom;verticalAlign=top;" vertex="1" parent="1">
        <mxGeometry x="470" y="91" width="40" height="40" as="geometry"/>
      </mxCell>
    </bpmn:endEvent>
    <bpmn:sequenceFlow name="" sourceRef="3" targetRef="5" id="6">
      <mxCell style="endArrow=block;endFill=1;endSize=6;edgeStyle=orthogonalEdgeStyle" edge="1" parent="1" source="3" target="5">
        <mxGeometry x="1" y="1" as="geometry">
          <mxPoint as="sourcePoint"/>
          <mxPoint x="30" y="30" as="targetPoint"/>
        </mxGeometry>
      </mxCell>
    </bpmn:sequenceFlow>
  </bpmn:process>
</bpmn:definitions>

I am new to BPMN, but shouldn't these two be compatible? Shouldn't I be able to design a workflow in any bpmn designer and execute in any execution engine?

Hello Team,
I have created a bpmn process and it executes well. Is it possible to get the specific running instance of process and validate any of the task (Human Task) from the process using the instance.

Thanks

The project remains in development? or has it been abandoned? please answer us

bpmn.createUnmanagedProcess("/why/would/we/need/this/full/path/task.bpmn", function(err, task){
    task.triggerEvent("MyStart");
});

If only a filename is provided, cannot we use the called entry point script location as root?

I tried to open the bpmn files in the examples directory in Eclipse BPMN Modeler 1.2.4 and Camunda Modeler 1.5.1. Both show errors when opening the files. Below is the error log for task.bpmn in Eclipse. Camuda won't even open the diagram. Eclipse opens task.bpmn but collaboration.bpmn does not display properly, which may be related to the error messages.

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.546
!MESSAGE DocumentRoot id="unknown": Feature 'label' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 6, 60)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.546
!MESSAGE DocumentRoot id="unknown": Feature 'mxCell' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 7, 129)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.546
!MESSAGE DocumentRoot id="unknown": Feature 'label' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 11, 52)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.547
!MESSAGE DocumentRoot id="unknown": Feature 'mxCell' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 12, 70)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.552
!MESSAGE DocumentRoot id="unknown": Feature 'mxCell' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 17, 130)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.552
!MESSAGE DocumentRoot id="unknown": Feature 'label' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 24, 54)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.552
!MESSAGE DocumentRoot id="unknown": Feature 'mxCell' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 25, 127)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.552
!MESSAGE DocumentRoot id="unknown": Feature 'mxCell' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 30, 130)

We get [Error: The BPMN file '...'. contains more than one process definition. Use 'createCollaboratingProcesses' instead of 'createProcess'] if no executable definition is found which is wrong

Possibly related to #16 and #17, we've been using your BPMN engine successfully now for a number of months with no glitches, but we recently had a requirement to modify rather than add one of the properties on a process instance. When we do this using setProperty, it shows as modified when using getProperties, but is left unchanged in the database. If there is a simple fix for this, we'd very much appreciate a patch.

when creating a manager with persistence:

var manager = new bpmn.ProcessManager({
    persistencyOptions: {
        uri: "mongodb://127.0.0.1:27017/bpmn"
    }
});

then creating a new task

var client = restify.createJsonClient({url: "http://localhost:9009"});
client.post('/Task');

The new task is not stored in mongodb. It is stored only if you create AND start it:

var client = restify.createJsonClient({url: "http://localhost:9009"});
client.post('/Task/MyStart');

When flow reaches the subprocess - handler is being called and then flow ends. No handler for start event in subprocess is called and I haven't found any functionality to start sub process. Any ideas on how to get this done?

Hi all and happy holidays,

I am new to node, I can't not understand how to start a new bpmn project in node, and how to start a new process and how to Handel in the handlers, can anyone help me with sample bpmn project in node or point me to documentation explaining the above.

Thanks and appreciate in advance

From documentation and source code it is not clear.

I am having trouble clustering the bpmn using pm2. I can only find process that were created by that node of the cluster. is it possible to refresh the process cache from what has been persisted to the data store?

I am using timer event in my workflow. i am not bale to pass data using done(data)

howa can i define frontend route with restify!

Please add examples for CallActivity/SubProcess and saving user tasks.

I have add Execution Listener and generate XML.

<bpmn:task id="Task1">
    <bpmn:extensionElements>
      <camunda:executionListener event="start">
        <camunda:script scriptFormat="javascript">function(){alert(1)}</camunda:script>
      </camunda:executionListener>
    </bpmn:extensionElements>
   <bpmn:incoming>SequenceFlow_1hvxda3</bpmn:incoming>
</bpmn:task>

How to use "camunda:executionListener" properties?

Can we Use lanes in BPMN ?? How to use in this git example

Hi,

Would there be any interest in pulling this if I implement it? I think RethinkDB + BPMN are very cool, complimentary technologies.

I like to implement BPM engine in Node to execute business process we are using your bpmn package and it works fine. I do have some queries

Can we introduce organisation and lanes in your module. If yes then how can we implement ?

Hello Team,

Could you please share any example of handling the intermediate message event.

Thanks

Hi,

I saw that to use
bpmn.createUnmanagedProcess("path/to/myProcess.bpmn", ...});
or
bpmn.createUnmanagedProcessFromXML("<definitions ... ", ...);

the first parameter is always the bpmnXml source,.. I know that XML Parsing is a little hardest work,
and it consume resources (processor and memory),..

I think that if we are always passing the bpmnXML source as first param, it always is parsing the schema to json. The question is, is there a way to persist the first parse of the schema,. (or cache), to do not parse the xml each time that we need to use an instance of a given process.

By example:

------------------------------------------File A ---------------------------------------------

    var processManager = new bpmn.ProcessManager({
        persistencyOptions: {
            uri: util.format('mongodb://%s:%s/%s', config.db.host, config.db.port, config.db.name)
        },
        bpmnXML: {name: 'TaskExampleProcess', xml: bpmnXML},
        handlerString: {name: 'Process1', string: handlerString}
    });

    processManager.createProcess("instance2", function(err, myProcess){
        if (err) throw err;
        // we start the process
        myProcess.triggerEvent("StartEvent_1");
        console.log('process started');
    });

------------------------------------------File B ---------------------------------------------

   var processManager = new bpmn.ProcessManager({
        persistencyOptions: {
            uri: util.format('mongodb://%s:%s/%s', config.db.host, config.db.port, config.db.name)
        },
        bpmnXML: {name: 'TaskExampleProcess', xml: bpmnXML},
        handlerString: {name: 'Process1', string: handlerString}
    });
    //// returns all processes
    processManager.getAllProcesses(function(err, processes) {
        console.log(processes)
    });

So, on both files I need to pass bpmnXML string, and I assume that the engine is parsing twice the xml.
The best way would be parse the xml at first time, give me an ID,... and on the second file B, I create the processManager instance with the given ID, and do not pass again the XML.

BEST REGARDS.

Hi ,
I have tried the collaboration process in rest way , I use the example : test/resources/projects/collaboration/collaboration.bpmn , howerver , I got the the following result

error:  process=My_Second_Process, id=1fc883b0-6593-11e4-9b73-eb590f76728b, description=Error in handler 'Task_2': TypeError: Cannot read property 'processClient' of undefined

I changed the name of every node with underscore for rest .

client.post('/My_Second_Process/Start_Event_2',function(error, req, res, obj) {
});

this.getParticipantByName("My_First_Process") does not work.

exports.Task_2 = function(data, done) {
    log("Task_2");
    this.getParticipantByName("My_First_Process", function(err, partnerProcess){
        partnerProcess.triggerEvent("Start_Event_1");
        done(data);
    });
};

Thanks a lot .

can you provide any sample web application which contains listener events and also extensions uses.

I assume that the implementation of boundary events are interrupt which means the activity which was being performed will immediately be canceled,
That's right?

So, there is a way to implement non-interrupt boundary events?

Best Regards.

When I try to load a process wiht

var path = require("path");
bpmn.createUnmanagedProcess("./plan/myDiag.bpmn", function (err, myProcess) {
    // we start the process
    myProcess.triggerEvent("MyStart");
});

the handler.js file tries to load the associated .js file (myDiag.js) from the location the handler.js file is located. in my example the handler.js file is ...../node_modules/bpmn/lib/handler.js, which is not the same folder in which my myDiag.bpmn file is located.

I am using the task.bpmn sample.

task.bpmn | uploaded via ZenHub

A basic manager:

var bpmn = require("bpmn");
var manager = new bpmn.ProcessManager();

bpmn.createUnmanagedProcess("/.../task.bpmn", function(err, task){
    task.triggerEvent("MyStart");
});

and the following handlers:

/*global module exports console */

exports.MyStart = function( data , done ){
    // called after the start event arrived at MyStart
    console.log("Running MyStart");
    done();
};

exports.MyTask = function( data , done ){
    // called at the beginning of MyTask
    console.log("Running MyTask");
    setTimeout(function(){
        done();
    }, 2000);

};

exports.MyTaskDone = function( data , done ){
    // Called after the process has been notified that the task has been finished
    // by invoking myProcess.taskDone("MyTask").
    // Note: <task name> + "Done" handler are only called for
    // user tasks, manual task, and unspecified tasks
    console.log("MyTask is now Done", data);
    done();
};


exports.MyEnd = function( data , done ){
    // Called after MyEnd has been reached
    console.log("Running MyEnd");
    done();
};

exports.MyEndDone = function( data , done ){
    // Called after MyEnd has been reached
    console.log("MyEnd is done");
    done();
};

I get the following output:

$ node manager.js 
Running MyStart
Running MyTask
$ 

so some handlers seem not to be called:

• MyTaskDone
• MyEnd
• MyEndDone (ok not sure whether this one makes sense at all 😄 )