Augmentation of BPEL with New Functions Using Aspect-oriented Programming

BPEL is a standard executable language for specifying actions within business processes with web services. BPEL workflow requires a rule engine to describe application processes in BPEL. In this paper, we introduce a new method to augment BPEL with new functions using aspect-oriented programming by presenting JWX and JWX4BPEL. JWX is a document to describe additional functions, and JWX4BPEL weaves them with BPEL in order to apply new functions to BPEL using aspect-oriented programming. JWX4BPEL generates a new workflow with the additional functions without modifying the original BPEL document. We also show an application example of JWX4BPEL, a payment system, in which rules for new requirements are applied to pre-existing hiring information. As a result, it is possible to provide modeling services using rules and to increase reusability of documents.