A multi-perspective approach for web service composition

Abstract

The new paradigm for distributed computing over the Internet is that of Web services (WSs). One of the key ideas of this new paradigm is the ability to create value-added Service-Based Applications (SBAs) by composing pre-existing services. Building SBAs necessitates the discovery and the selection of the most appropriate WSs that fit closely users' functional and non-functional requirements. Due to the large number of WSs that are advertised over public and private registries and the various functional and non-functional capabilities that are required by users, discovery and selection of WSs have become a real challenge nowadays. In this paper, we present a WS composition approach that is built upon both perspectives: intentional and operational. In the intentional perspective, we propose to model users' requirements for SBAs using the MAP formalism and specify the required WSs using an Intentional Service Model (ISM). In the operational perspective, we propose to discover the required WSs by querying the service search engine Service-Finder and select the most appropriate WSs by using many-valued concept lattices. To validate our approach, we use an analytical technique that is the monitoring to verify that the selected WSs assure the required users' non-functional capabilities.

Servicing Your Requirements: An FCA and RCA-Driven Approach for Semantic Web Services Composition

“…In [15], [16], a requirement-oriented approach was proposed starting with modeling user's requirements using a meta-process formalism (i.e., MAP) that is used to model the required services to be composed in a single graph and then specifying them using an Intentional Service Model (ISM). Next, to discover compatible services, a service engine, which is Service-Finder, was used to search for operational (i.e., functional) services.…”

A goal-oriented approach for dynamic execution of services based on aspect-oriented programming

“…2) The Driss approach [7]: the author suggests a multiperspective approach centred web services composition requirements based on a QoS layer. The author proposes to extend a tool for the automatic discovery of relevant software services and presents the definition and the implementation of a guidance method for the automatic selection of software services.…”

“…Kaabi [5], Rolland [6] and Driss [7], addressed the intentional composition and execution service issues. The above mentioned approaches are based on BPEL for implementing intentional services, thus, they do not give a dynamic solution to implement intentional services since BPEL as already mentioned describes process with a static manner.…”

“…Defining services at an intentional level is necessary for bridging the gap between technical software service descriptions and strategic expressions of business requirements. In fact, the publishing and search [4], composition and execution [5] [6] [7], and adaptation [8] of such services have been made on the basis of intentional descriptions.…”

“…Focusing on the research that has addressed the service composition and execution issue from an intentional perspective [5] [6] [7], we notice that all these approach are based on the Business Process Execution Language (BPEL) [9] in order to execute such services. However, BPEL provides a static process description that does not allow it to support adaptations in real time.…”