The document describes an EMF workflow model for constructing executable workflows. It outlines the design model, runtime model, and support for generating editors and launching workflows in Eclipse. It provides details on workflow components, composites, orchestration strategies, parameters, and connections. An example is described to concatenate two strings as a demonstration of a simple workflow.

1. EMF Workflow
Bryan Hunt
bhunt@mac.com
Twitter hashtag: #emfworkflow
Thursday, March 5, 2009

2. EMF Workflow
EMF meta-model for constructing an executable workflow
❖
Design Model
❖
Runtime Model
❖
Support
❖
Generated editor
❖
Eclipse launcher for running a workflow
❖
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3. Workflow Design Model
WorkflowComponent
*
WorkflowCompositeComponent WorkflowUnitOfWork
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4. Workflow Design Model
WorkflowComponent
*
WorkflowCompositeComponent WorkflowUnitOfWork
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5. Workflow Design Model
WorkflowComponent
*
[ordered]
WorkflowCompositeComponent WorkflowUnitOfWork
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6. Workflow Design Model
WorkflowComponent 1
*
[ordered]
2 3 4 5
6 7
WorkflowCompositeComponent WorkflowUnitOfWork
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7. Workflow Design Model
WorkflowCompositeComponent
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8. Workflow Design Model
WorkflowCompositeComponent WorkflowCompositeOrchestrationStrategy
1
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9. Workflow Design Model
WorkflowSerialOrchestrationStrategy
WorkflowCompositeComponent WorkflowCompositeOrchestrationStrategy
1
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10. Workflow Design Model
WorkflowSerialOrchestrationStrategy
WorkflowCompositeComponent WorkflowCompositeOrchestrationStrategy
1
WorkflowParallelOrchestrationStrategy
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11. Workflow Design Model
WorkflowSerialOrchestrationStrategy
WorkflowParallelOrchestrationStrategy
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12. Workflow Design Model
WorkflowSerialOrchestrationStrategy
1
2 3 4 5
6 7
WorkflowParallelOrchestrationStrategy
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13. Workflow Design Model
WorkflowSerialOrchestrationStrategy
1
2 3 4 5
6 7
WorkflowParallelOrchestrationStrategy
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14. Workflow Design Model
WorkflowSerialOrchestrationStrategy
1
2 3 4 5
6 7
WorkflowParallelOrchestrationStrategy
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15. Workflow Design Model
1
2 3 4 5
6 7
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16. Workflow Design Model
1
2 3 4 5
6 7
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17. Workflow Design Model
2
3
1
2 3 4 5
6 7
6 7
5
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18. Workflow Design Model
2
3
6 7
5
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19. Workflow Design Model
WorkflowComponent 2
3
6 7
5
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20. Workflow Design Model
✔
WorkflowComponent 2
✔
3
✔✖
6 7
5
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21. Workflow Design Model
✔
WorkflowComponent 2
✔
1 3
WorkflowComponentOrchestrationStrategy
✔✖
6 7
5
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22. Workflow Design Model
✔
WorkflowComponent 2
✔
1 3
WorkflowComponentOrchestrationStrategy
✔✖
6 7
WorkflowConditionalComponentOrchestrationStrategy
5
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23. Workflow Design Model
✔
WorkflowComponent 2
✔
1 3
WorkflowComponentOrchestrationStrategy
✔✖
6 7
WorkflowConditionalComponentOrchestrationStrategy
*
5
WorkflowExecutionPredicate
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24. Workflow Design Model
✔
WorkflowComponent 2
✔
1 3
WorkflowComponentOrchestrationStrategy
✔✖
6 7
WorkflowConditionalComponentOrchestrationStrategy
*
5
WorkflowExecutionPredicate
WorkflowRerunPredicate
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25. Workflow Design Model
✔
WorkflowComponent 2
✔
1 3
WorkflowComponentOrchestrationStrategy
✔
6 7
WorkflowConditionalComponentOrchestrationStrategy
*
5
WorkflowExecutionPredicate
WorkflowRerunPredicate
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26. Workflow Design Model
✔
WorkflowComponent 2
✔
1 3
WorkflowComponentOrchestrationStrategy
✔
6 7
WorkflowConditionalComponentOrchestrationStrategy
*
5
WorkflowExecutionPredicate
WorkflowRerunPredicate
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27. Workflow Design Model
✔
WorkflowComponent 2
✔
1 3
WorkflowComponentOrchestrationStrategy
✔ ✔
6 7
WorkflowConditionalComponentOrchestrationStrategy
*
✔
5
WorkflowExecutionPredicate
WorkflowRerunPredicate
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28. Workflow Design Model
2
3
6 7
5
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29. Workflow Design Model
Input
WorkflowComponent
* 2
3
WorkflowCompositeComponent WorkflowUnitOfWork
6 7
5
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30. Workflow Design Model
Input
WorkflowComponent
* 2
3
WorkflowCompositeComponent WorkflowUnitOfWork
6 7
*
WorkflowParameter
5
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31. Workflow Design Model
Input
WorkflowComponent
* 2
Output
3
WorkflowCompositeComponent WorkflowUnitOfWork
6 7
*
WorkflowParameter
5
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32. Workflow Design Model
Input
WorkflowComponent
* 2
Output
3
WorkflowCompositeComponent WorkflowUnitOfWork
6 7
*
*
WorkflowParameter
WorkflowParameterConnection
5
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33. Workflow Design Model
Input
WorkflowComponent
* 2
Output
3
WorkflowCompositeComponent WorkflowUnitOfWork
6 7
*
*
*
WorkflowParameter
WorkflowParameterConnection
5
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34. Workflow Runtime Model
Input
✔
2
Output
✔
3
✔✖
6 7
5
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35. Workflow Runtime Model
Input
✔
Output
✔
✔✖
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36. Workflow Runtime Model
Input
✔
Output
✔
EObject
WorkflowParameter
*
WorkflowContext
✔✖
WorkflowState
WorkflowComponent
*
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37. EMF Workflow Engine
EObject
WorkflowParameter
*
WorkflowContext
1
WorkflowState
WorkflowComponent
*
WorkflowEngine
1
WorkflowComponent
*
WorkflowCompositeComponent WorkflowUnitOfWork
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38. Hello World Example
x
concat(x, y) z
y
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39. Hello World Example
x
concat(x, y) z
y
Hello
concat(x, y) Hello world
world
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40. Hello World Example
WorkflowUnitOfWork
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41. Hello World Example
WorkflowUnitOfWork
Concat
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42. Hello World Example
WorkflowUnitOfWork
*
Concat WorkflowParameter
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43. Hello World Example
WorkflowUnitOfWork
*
Concat WorkflowParameter
inputMessage
inputAppendMessage
outputMessage
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44. Hello World Example
WorkflowUnitOfWork
*
Concat WorkflowParameter
inputMessage
inputAppendMessage
outputMessage
@Override
public WorkflowState run(WorkflowContext context) throws WorkflowRuntimeException
{
StringBuilder message = new StringBuilder();
message.append(getInputMessage().getValue(context));
if(message.length() > 0)
message.append(' ');
message.append(getInputAppendMessage().getValue(context));
getOutputMessage().setValue(context, message.toString());
System.out.println(message.toString());
return StateFactory.eINSTANCE.createWorkflowSuccessState();
}
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45. Hello World Example
WorkflowCompositeComponent
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46. Hello World Example
stageA :
Concat
WorkflowCompositeComponent
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47. Hello World Example
WorkflowComponentOrchestrationStrategy
stageA :
Concat
WorkflowCompositeComponent
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48. Hello World Example
inputMessageA :
WorkflowComponentOrchestrationStrategy
WorkflowParameter
stageA :
Concat
WorkflowCompositeComponent
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49. Hello World Example
inputMessageA :
WorkflowComponentOrchestrationStrategy
WorkflowParameter
stageA : inputAppendMessageA :
Concat WorkflowParameter
WorkflowCompositeComponent
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50. Hello World Example
inputMessageA :
WorkflowComponentOrchestrationStrategy
WorkflowParameter
stageA : inputAppendMessageA :
Concat WorkflowParameter
outputMessageA :
WorkflowParameter
WorkflowCompositeComponent
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51. Hello World Example
inputMessageA :
WorkflowComponentOrchestrationStrategy
WorkflowParameter
stageA : inputAppendMessageA :
Concat WorkflowParameter
outputMessageA :
WorkflowParameter
WorkflowCompositeComponent
inputMessageB :
WorkflowParameter
stageB : inputAppendMessageB :
Concat WorkflowParameter
outputMessageB :
WorkflowComponentOrchestrationStrategy
WorkflowParameter
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52. Hello World Example
inputMessageA :
WorkflowComponentOrchestrationStrategy
WorkflowParameter
stageA : inputAppendMessageA :
Concat WorkflowParameter
outputMessageA :
WorkflowParameter
WorkflowCompositeComponent WorkflowParameterConnection
inputMessageB :
WorkflowParameter
stageB : inputAppendMessageB :
Concat WorkflowParameter
outputMessageB :
WorkflowComponentOrchestrationStrategy
WorkflowParameter
Thursday, March 5, 2009

53. Hello World Example
inputMessageA :
WorkflowComponentOrchestrationStrategy
WorkflowParameter
stageA : inputAppendMessageA :
Concat WorkflowParameter
outputMessageA :
WorkflowSerialOrchestrationStrategy WorkflowParameter
WorkflowCompositeComponent WorkflowParameterConnection
inputMessageB :
WorkflowParameter
stageB : inputAppendMessageB :
Concat WorkflowParameter
outputMessageB :
WorkflowComponentOrchestrationStrategy
WorkflowParameter
Thursday, March 5, 2009

54. Hello World Example
inputMessageA :
WorkflowComponentOrchestrationStrategy
WorkflowParameter
stageA : inputAppendMessageA :
Concat WorkflowParameter
outputMessageA :
WorkflowSerialOrchestrationStrategy WorkflowParameter
WorkflowCompositeComponent WorkflowParameterConnection
inputMessageB :
WorkflowStateResolutionStrategy WorkflowParameter
stageB : inputAppendMessageB :
Concat WorkflowParameter
outputMessageB :
WorkflowComponentOrchestrationStrategy
WorkflowParameter
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55. Hello World Example
Hello :
inputMessageA :
WorkflowParameter
SimpleAnyType
worlflow :
inputAppendMessageA :
WorkflowParameter
SimpleAnyType
outputMessageA :
SimpleAnyType
WorkflowParameter
WorkflowContext
inputMessageB :
SimpleAnyType
WorkflowParameter
world :
inputAppendMessageB :
WorkflowParameter
SimpleAnyType
outputMessageB :
SimpleAnyType
WorkflowParameter
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56. Hello World Example
A
B
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57. Hello World Example
workflow Hello
A
B
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58. Hello World Example
workflow Hello
A
Hello workflow
B
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59. Hello World Example
workflow Hello
A
Hello workflow
B
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60. Hello World Example
workflow Hello
A
world Hello workflow
B
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61. Hello World Example
workflow Hello
A
world Hello workflow
B
Hello workflow world
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62. Resources
CVS
❖
❖ dev.eclipse.org/cvsroot/modeling/org.eclipse.emf/org.eclipse.mwe
❖ /plugins : workflow model
❖ org.eclipse.mwe.ewm.*
❖ /examples : hello world example
❖ org.eclipse.mwe.ewm.examples
Screencast: http://idisk.mac.com/bhunt-Public/WorkflowTutorial.mov
❖
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63. Thank You
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