Abstract:

RESTful Web service has become a primary method to publish services in cloud computing, due to its lightweight and specific semantics. However, because RESTful Web service only support synchronous interaction, it is difficult of using synchronous composition to meet the requirement of the complex business process. Therefore, the paper proposed a callback based asynchronous interaction approach under REST style. The approach enables the composition of both synchronous and asynchronous RESTful Web services by extending the BPEL meta model. The architecture of the execution engine for the extended BPEL was designed and implemented as well.

Key words: RESTful web service;asynchronous interaction;BPEL;service composition