Pattern based adaptation for service oriented applications

Abstract

Service Oriented Architecture(SOA) facilitates developing applications that are inherently dynamic in nature since the service binding happens at runtime by matching the functional as well as Quality of Service(QoS) requirements of the user. Further, the running application can be dynamically reconfigured by monitoring the application for possible violations in the agreed QoS requirements. This paper advocates the use of various patterns to facilitate such dynamic reconfiguration in the various layers of the SOA Reference Architecture. Towards this objective, Family of Adapters pattern has been used in the service component layer to achieve dynamic switching between different versions of the same service without human intervention. In addition, an SOA design pattern has been employed in the business process layer to enhance the efficiency of the application. This pattern based approach has been tested by applying it to a sample SOA based e-Shopping application case study.