A Novel Way of Invoking Web Services and RESTful Web Services Using Aspect Oriented Programming

The need for adaptability in software is growing, driven in part by the emergence of autonomic computing. In many cases, it is desirable to enhance existing programs with adaptive behavior, enabling them to execute effectively in dynamic environments. Existing web service invocation and adaptation mechanisms are limited only to the scope of web service choreography in terms of web service selection. Such a scope hardly leaves ground for a participating service in a choreographed flow to re-adjust itself in terms of changed non functional expectations. In this paper we used Aspect oriented programming (AOP) to invoke Web Services (WS) and Representational State Transfer (REST) web services and to enable dynamic adaptation in existing programs. We propose an approach to implement dynamic adaptability especially in Aspect weaving at the time invoking web services and REST web service. We have used AspectJ; Java based language to create aspects in Eclipse supported framework.