Extended SOA to Enable Web Service Discovery on Non Functional Parameters

The current Service Oriented Architecture (SOA) standards, namely the concept of Web services and service registry lacks mechanism for managing the services’ nonfunctional properties of Web Services. Currently there is no standard that is capable of accurately representing quality of service parameters of web services. Such non functional properties are expressed by the term “Quality of Service (QoS)”. QoS for Web services is an important decisive factor for service selection. Therefore it is important to extend the SOA so that non-functional characteristics of a web service can be determined at run-time and consumers are bound to a service that best meet their functional as well as non-functional requirements. Major research challenges in discovering Web services include, differentiating between services that share similar functionalities, improving Quality of Service (QoS), and enabling clients to customize the discovery process. To enable QoS enabled web services discovery, it is needed that a third party (other than service provider and service broker) monitors quality of web service. In this paper, an extended web services framework based on SOA for enabling Web Service discovery based on QoS parameters such as availability and response time is proposed thereby maintaining the appropriate dynamic values of these QoS parameters.