Chapter

Formal Techniques for Networked and Distributed Systems – FORTE 2007

Volume 4574 of the series Lecture Notes in Computer Science pp 81-96

Exploring the Connection of Choreography and Orchestration with Exception Handling and Finalization/Compensation

  • Yang HongliAffiliated withLMAM and Department of Informatics, School of Math., Peking University, Beijing 100871
  • , Zhao XiangpengAffiliated withLMAM and Department of Informatics, School of Math., Peking University, Beijing 100871
  • , Cai ChaoAffiliated withLMAM and Department of Informatics, School of Math., Peking University, Beijing 100871
  • , Qiu ZongyanAffiliated withLMAM and Department of Informatics, School of Math., Peking University, Beijing 100871

Abstract

Web service choreography describes protocols for multiparty collaboration, whereas orchestration focuses on single peers. One key requirement of choreography is to support transactions, which makes exceptional handling and finalization very important features in modelling choreography. A projection is a procedure which takes a choreography and generates a set of processes in the orchestration level. Given a choreography, how to project exceptional handling and finalization constructs is still an open problem. This paper aims to study exception handling and transactionality in choreographies from a projection view. We propose formal languages for both choreography and orchestration with trace semantics, and a projection based on the relationship between choreography and scope rooted in WS-CDL and WS-BPEL respectively.

Keywords

Choreography Orchestration Projection Exception Handling Finalization Compensation