This document summarizes a presentation about executing BPMN 2.0 processes with jBPM 3. It discusses mapping BPMN models to jPDL for execution, abstracting the process engine to support different backends, and examples of using a Process Engine Abstraction Layer. The presentation also covers BPMN 2.0 concepts like the separation of model and notation, and how jBPM can support asynchronous services through a callback mechanism. The presenter is introduced as a consultant, trainer, and developer who works on open source BPM projects like Activiti and is involved in the BPMN specification.

2. Executing BPMN 2.0 with jBPM 3
or (at your option) any later version
Falko Menge
JUDCon 2010
Berlin

3. • Consultant, trainer & coach for
jBPM 3 & 4, Drools, BPMN Falko Menge
• Developer of several falko.menge@camunda.com
Open Source projects
(Activiti, Oryx Editor, WSDL2XForms,
InstantSVC, …)
• Member of BPMN specification team
at OMG
• Co-author of „BPMN 2.0 by Example“
Areas of Interest:
BPM, SOA & EAI with Open Standards
and Open Source Software
Process Execution
(BPMN 2.0, jPDL, BPEL, XPDL, …)
Enterprise Applications with Java EE

4. Overview
BPMN
Mapping BPMN to jPDL
Abstracting the Engine

5. BPMN?

7. BPMN 2.0 – An Example

8. BPMN 2.0 Status
…

9. Why does everybody want BPMN 2.0?
<XML> Diagram Execution <XML>
Interchange Semantics

10. BPMN 1.x: Just Symbols
Notation

11. BPMN 2.0: Model and Notation
Execution
Examples
Semantics
Model Notation
XML Diagram
XML XMI
Interchange
XSLT

12. Desired Architecture with BPMN 2.0

13. What does that mean as well?

14. Where are those
BPMN process engines?

15. Currently, jBPM 3 is used

16. Isn‘t there a gap?
?

17. Goal: Forward Engineering
Mapping
Or even
Roundtrip?
Process Process
Analyst Engineer

18. Mapping Overview (1/2)

19. Mapping Overview (2/2)

20. Does that mean there are different models?
„Call FraudService.
Fraud- checkFraud(customer)
Service“
??
BPMN Repository Developer Repository in
(Signavio) Repository (SVN) Process Engine
Model in
Developer
Business Model in
Model Execution
Logical
Model

21. Patterns
Pool extraction
Transform custom elements
into standard language constructs
Custom task service
Localization

22. What about my Java code?

23. Process Engine Abstraction Layer (PEAL)
ESB
Application Services
API
BPMN Binding
Modell
Mapping
Process
Engine
Binding
Connectivity
Services Application
ESB

24. Example Code with PEAL
UserTask task3 = taskService
.createTaskQuery()
.processInstanceId(pi.getId())
.potentialOwner("mike")
.uniqueResult();
assertEquals("Specify Advertising strategy",
task3.getActivityName());
variables = new HashMap<String, Object>();
variables.put("website_name", "SetpStone");
task3.complete(variables);
pi.reload();
assertTrue(pi.isEnded());
Changes to the jbpm 4 API are minimal (but can be bound to
jbpm 3 and other engines as well)

25. Data Object Abstraction
API
DataObject «interface»
DataObjectAware
+getPersistentDataObject()
+getValue() +setPersistentDataObject()
+setValue() +getTransientDataObject()
1
+setTransientDataObject()
+...()
PersistentDataObject TransientDataObject
ExecutionContext
ExecutionContext
DataObjectAware
+getValue()
getValue() +getValue()
getValue()
+setValue() +setValue()
1
ContextInstace
ContextInstance
DataObjectAware
1
MyPersistentDataObject
-NAME : String = "MyVariable" ProcessInstance
ProcessInstance
DataObjectAware
1
Project specific DataObjects Binding (e.g.jBPM 3) jBPM 3

26. Abstraction of Service Adapters
jBPM 3
API
Binding (e.g. jBPM 3)
Project specific adaptors

27. Why so complicated? Example with asynchronous Services
<<Node>>
Invoke ESB Service
EJB-Call
TX 1: create request without sync.
jBPM job
result
TX 2: call EJB
ESB
TX 3: process response Signal from JbpmCallback
<<Node>>
Invoke EJB
TX 1: create request EJB-Call with
jBPM job sync. result
TX 2: call EJB
jBPM job
TX 3: process response
jBPM Process

28. Process Engine Abstraction Layer (PEAL)
ESB
Application Services
API
BPMN Binding
Modell
Mapping
Process
Engine
Binding
Connectivity
Services Application
ESB

29. Thank you for your attention – Any questions?

30. camunda services GmbH
Thank You! Zossener Str. 55-58
1096 Berlin
1
Telefon: +49 30 664 0409-00
Telefax: +49 30 664 0409-29
Email: info@camunda.com
Falko Menge
Consultant, trainer and software developer
falko.menge@camunda.com
JUDCon
Berlin, 8 October 2010
The BPM Blog
www.bpm-guide.de