Design Pattern for Feature-Oriented Service Injection and Composition of Web Services for Distributed Computing Systems with SOA

Abstract

In the world of today's Enterprise Java Applications development, there is a need to support the principles of the Service Oriented Architecture (SOA). So in order to develop the SOA based applications any enterprise java developer should have the strong foundation in Java Web Services (JWS). As most of the leading enterprise java vendors feel that it's perfect to use the JWS technologies for the development of their SOA applications. In this paper we will propose a new design pattern in terms of Distributed application development, where we will be concentrating on the web services invocation and the composition of web services with the support of SOA. The paper will provide a perfect idea about how the amalgamation of Visitor Design Pattern and Case-Based Reasoning Design Pattern help us for the development of the Service Invocation and Web Services Composition through SOA with the help of JWS technologies. And also with the help of newly introduced programming models like Feature-Oriented Programming (FOP), it will be flexible for us to include the new service invocation function into the service providing server as a Feature Module. We have provided with the sample code that we have developed for the application in our paper. Here we will be using the Service Oriented Architecture (SOA) with Web Services in Java to Implement the Design Pattern. The pattern is described using a java-like notation for the classes and interfaces. A simple UML Class and Sequence diagrams are depicted.