TRAP/BPEL - A Framework for Dynamic Adaptation of Composite Services

TRAP/BPEL is a framework that adds autonomic behavior into existing BPEL processes automatically and transparently. We define an autonomic BPEL process as a composite Web service that is capable of responding to changes in its execution environment (e.g., a failure in a partner Web service). Unlike other approaches, TRAP/BPEL does not require any manual modifications to the original code of the BPEL processes and there is no need to extend the BPEL language nor its BPEL engine. Furthermore, TRAP/BPEL promotes the reuse of code in BPEL processes as well as in their corresponding autonomic behavior. In this paper, we describe the details of the TRAP/BPEL framework and use a case study to demonstrate the feasibility and effectiveness of our approach.