Web-based Editor for BPEL4Chor Choreographies - IAAS

iaas.uni.stuttgart.de

Web-based Editor for BPEL4Chor Choreographies - IAAS

Prof. Dr. Frank Leymann

Oliver Kopp

Institute for Architecture of Application Systems

Diploma Thesis

A Runtime for BPEL4Chor Cross-Partner-Scopes

Choreographies can be described in two ways: As pure interaction model, where the

interaction between the participants is captured. One example for such an “interaction

modeling language” is Let’s Dance [4]. The second option is to interconnect the behavior

descriptions of each participant to form a global overview. BPEL4Chor [1] is developed at the

IAAS to support the second view.

To add cross-partner fault handling and transaction handling, the concept of “Cross-Partner-

Scopes” (CPS) is developed [2]. The runtime for Cross-Partner-Scopes is only a rough

prototype sketched in [3][7]. To support Cross-Partner-Scopes, the sketched prototype of the

coordinator for Cross-Partner-Scopes should be extended to a coordinator supporting multiple

choreography instances. There, BPEL processes should be regarded as option.

The student has to manage his schedule including this work packages and milestones for

himself. A helpful guide for planning and writing a thesis can be found in [5] and [6].

Tasks

• Compare different WS-Coordination implementations with respect to performance,

portability, scalability and extensibility

• Compare the approaches of [3] and [8] for suitability to implement additional

coordination of BPEL processes deployed on Apache ODE

• Describe a concept to distinguish different chorography instances

• Implement Cross-Partner-Scope coordination in Apache ODE

• Implement the coordinators required for Cross-Partner-Scopes

Requirements

• Good documentation of the code suitable for reuse and maintenance including the

description of the architecture and UML-diagrams

Required previous knowledge and experiences:

• XML, WS-BPEL, Java, UML, software engineering

• Lecture “Workflow Management”

References:

[1] G. Decker, O. Kopp, F. Leymann, M. Weske. BPEL4Chor: Extending BPEL for Modeling

Choreographies. ICWS 2005.

[2] O. Kopp. Cross-partner Fault Handling and Transactions. IAAS. Presentation. 2008.

[3] T. Steinmetz. Ein Event-Modell für WS-BPEL 2.0 und dessen Realisierung in Apache ODE. Diploma

Thesis No. 2729, University of Stuttgart. To be submitted August 1, 2008.

[4] J. M. Zaha, A. Barros, M. Dumas, and A. ter Hofstede. A Language for Service Behavior Modeling. In

Proceedings 14th International Conference on Cooperative Information Systems (CoopIS 2006),

Montpellier, France, Nov 2006. Springer Verlag. http://eprints.qut.edu.au/archive/00003459.

[5] J. Zobel. Writing for Computer Science. The Art of effective Communication. Springer. 2004.

[6] M. Deininger, H. Lichter, J. Ludewig, K. Schneider. Studien-Arbeiten – ein Leitfaden zur Vorbereitung,

Durchführung und Betreuung von Studien-, Diplom-, Abschluss- und Doktorarbeiten am Beispiel

Informatik. vdf Hochschulverlag AG an der ETH Zürich.


[7] M. Bischof. Modeling and Runtime Support of Faults in Interaction Choreography Models. Diploma

Thesis No. 2885, University of Stuttgart, 2009.

[8] van Lessen, Tammo; Leymann, Frank; Mietzner, Ralph; Nitzsche, Jörg; Schleicher, Daniel: A

Management Framework for WS-BPEL. In: Proceedings of the 6th IEEE European Conference on

Web Services 2008.

Student theses and diploma theses are available online at

http://www.informatik.uni-stuttgart.de/zdi/buecherei/NCSTRL_listings/IAAS/index.html.en

Contact

oliver.kopp@iaas.uni-stuttgart.de

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