RUNTIME SERVICE DISCOVERY

Abstract

During the execution of service based application there is an important issue for replacing the service in them which fails to satisfy the current requirement or is no longer present. Services based can be identified on various service parameters such as quality,behavioural,contextual andstructural leads to effective runtime discovery of service. So, we are introducing a framework that support runtime services discovery.The framework supports two modes of execution of query for service discovery namely push and pull mode. In pull mode (reactive way), queries are executed oncerequirement for searching a replacement service rises (for example: unavailability or malfunctioning of service, emergence of new service, changes in structure functionality etc.).In push mode (proactive way), execution of query is carried out  parallely to the servicebased system execution. Hence, if there is a requirement to substitute or changea service in service-based application, push(proactive) mode of execution of query makes it possible to escape interruptions in the working of application. Both types (i.e., pull and push) of queries are indicated in a XML based query language known as SerDQueL. SerDQueL is the language that allows the representation of behavioral (functionality), structural(interface), contextual and quality conditions of services need to be found. So in this paper, we are going to discuss the runtime service discovery framework.