Self-Healing in Dynamic Web Service Composition

Abstract

The interconnection of several web services into single composite web services is known as Web Service Composition (WSC). WSC can be implemented in three different ways such as static, semi-dynamic and dynamic. In this research, the dynamic web service composition is accentuated as it is the most challenging method where it occurs during run time to fulfill the business process requirement. Too many errors may lead to the entire failure of WSC at the point whereby poor performance and unavailability take place. In such situation, healing mechanism is required to heal the faults. This research therefore emphasizes on Quality of Service (QoS) that includes availability and performance which utilizes self-healing, an autonomic act which heal the fault by itself without halting the service and human intervention. The self-healing approach that is used in this research is substitution. By substitution, the faulty web service will be automatically substituted with the next web service in the queue from a list of services. By implementing this healing method, the service malfunction is prevented and the quality of web service is improved whereby the web service will always be available with better performance.