MR-IDPSO: a novel algorithm for large-scale dynamic service composition

Recent computing world has seen rapid growth of the number of middle and large scale enterprises that deploy business processes sharing variety of services available over cloud environment. Due to the advantage of reduced cost and increased availability, the cloud technology has been gaining unbound popularity. However, because of existence of multiple cloud service providers on one hand and varying user requirements on the other hand, the task of appropriate service composition becomes challenging. The conception of this chapter is to consider the fact that different quality parameters related to various services might bear varied importance for different user. This chapter introduces a framework for QoS-based Cloud service selection to satisfy the end user needs. A hybrid algorithm based on genetic algorithm (GA) and Tabu Search methods has been developed, and its efficacy is analysed. Finally, this chapter includes the experimental analysis to present the performance of the algorithm.

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Issues on the Compatibility of Web Service Contracts

Innovations, Standards and Practices of Web Services ◽

10.4018/978-1-61350-104-7.ch008 ◽

2013 ◽

pp. 154-188 ◽

Cited By ~ 3

Author(s):

Surya Nepal ◽

John Zic

Keyword(s):

Web Service ◽

Service Composition ◽

Large Scale ◽

Service Oriented Architecture ◽

Distributed Applications ◽

Compatibility Conditions ◽

Service Contract ◽

Service Contracts ◽

Service Oriented ◽

Application Developers

In the Service Oriented Architecture (SOA) model, a service is characterized by its exchange of asynchronous messages, and a service contract is a desirable composition of a variety of messages. Though this model is simple, implementing large-scale, cross-organizational distributed applications may be difficult to achieve in general, as there is no guarantee that service composition will be possible because of incompatibilities of Web service contracts. We categorize compatibility issues in Web service contracts into two broad categories: (a) between contracts of different services (which we define as a composability problem), and (b) a service contract and its implementation (which we define as a conformance problem). This chapter examines and addresses these problems, first by identifying and specifying contract compatibility conditions, and second, through the use of compatibility checking tools that enable application developers to perform checks at design time.

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Agent-Based Infrastructure for Dynamic Composition of Grid Services

Handbook of Research on P2P and Grid Systems for Service-Oriented Computing ◽

10.4018/978-1-61520-686-5.ch039 ◽

2010 ◽

pp. 911-936

Author(s):

Matthew Adigun ◽

Johnson Iyilade ◽

Klaas Kabini

Keyword(s):

Service Composition ◽

Research Effort ◽

Multi Agent System ◽

Grid Services ◽

Agent System ◽

Agent Based ◽

Dynamic Composition ◽

Emerging Trends ◽

Dynamic Service Composition ◽

Multi Agent

The service-oriented computing paradigm is based on the assumption that existing services can be put together in order to obtain new composite services. This chapter focuses on how peer-to-peer architectures based on multi-agent systems can be used to build highly dynamic and reconfigurable infrastructure that support dynamic composition of grid services. The chapter starts by providing an overview of key technologies for SOC. It then introduces dynamic service composition and challenges of composing grid services. The authors further motivate for Multi-agent system approach in SOC and why it becomes important in service composition. They then present our research effort, AIDSEC, an agent-based infrastructure for dynamic service composition, describing its architecture, implementation and comparison with some related work in the literature. In addition, the chapter raises some emerging trends in SOC and the particular challenges they pose to service composition. They conclude by suggesting that a solution based on multi-agent system is required for composing services that possess capabilities of autonomy, reliability, flexibility, and robustness.

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Rapid Development of Adaptable Situation-Aware Service-based Systems

Advances in Web Services Research - Web Services Research for Emerging Applications ◽

10.4018/978-1-61520-684-1.ch006 ◽

2010 ◽

pp. 104-139 ◽

Cited By ~ 1

Author(s):

S.S. Yau ◽

S. Mukhopadhyay ◽

H. Davulcu ◽

D. Huang ◽

R. Bharadwaj ◽

...

Keyword(s):

Distributed Control ◽

Homeland Security ◽

Situation Awareness ◽

Service Composition ◽

Large Scale ◽

Rapid Development ◽

Control Flow ◽

Agent Platform ◽

Service Oriented ◽

Adaptive Workflows

Service-based systems have many applications, such as collaborative research and development, e-business, health care, military applications and homeland security. In these systems, it is necessary to provide users the capability of composing appropriate services into workflows offering higher-level functionality based on declaratively specified goals. In a large-scale and dynamic service-oriented computing environment, it is desirable that the service composition is automated and situation-aware so that robust and adaptive workflows can be generated. However, existing languages for web services are not expressive enough to model services with situation awareness (SAW) and side effects. This chapter presents an approach to rapid development of adaptable situation-aware service-based systems. This approach is based on the a-logic and a-calculus, and a declarative model for SAW. This approach consists of four major components: (1) analyzing SAW requirements using our declarative model for SAW, (2) translating the model representation to a-logic specifications and specifying a control flow graph in a-logic as the goal for situation-aware service composition., (3) automated synthesis of a-calculus terms that define situation-aware workflow agents for situation-aware service composition, and (4) compilation of a-calculus terms to executable components on an agent platform. An example of applying our framework in developing a distributed control system for intelligently and reliably managing a power grid is given.

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