A Genetic Algorithm-Based QoS Analysis Tool for Reconfigurable Service-Oriented Systems

2011 ◽  
pp. 121-146 ◽  
Author(s):  
I-Ling Yen ◽  
Tong Gao
Keyword(s):  
Genetic Algorithm ◽  
Performance Analysis ◽  
Web Services ◽  
Composition Analysis ◽  
Analysis Tool ◽  
Analysis Techniques ◽  
Dynamic Composition ◽  
Application Systems ◽  
Service Oriented ◽  
The Web

Reconfigurability is an important requirement in many application systems. Many approaches have been proposed to achieve static/dynamic reconfigurability. Service-oriented architecture offers a certain degree of reconfigurability due to its support in dynamic composition. When system requirements change, new composition of services can be determined to satisfy the new requirements. However, analysis, especially QoS based analysis, is generally required to make appropriate service selections and service configurations. In this chapter, we discuss the development of QoS-based composition analysis techniques and propose a QoS specification model. The specification model facilitates QoS-based specification of the properties of the Web services and the requirements of the application systems. The composition analysis techniques can be used to analyze QoS tradeoffs and determine the best selections and configurations of the Web services. We develop a composition analysis framework and use the genetic algorithm in the framework for composition decision making. The framework currently supports SOA performance analysis. The details of the genetic algorithm for the framework and the performance analysis techniques are discussed in this chapter.

A Genetic Algorithm-Based QoS Analysis Tool for Reconfigurable Service-Oriented Systems

2009 ◽  
pp. 3118-3141
Author(s):  
I-Ling Yen ◽  
Tong Gao ◽  
Hui Ma
Keyword(s):  
Genetic Algorithm ◽  
Performance Analysis ◽  
Web Services ◽  
Composition Analysis ◽  
Analysis Tool ◽  
Analysis Techniques ◽  
Dynamic Composition ◽  
Application Systems ◽  
Service Oriented ◽  
The Web

Reconfigurability is an important requirement in many application systems. Many approaches have been proposed to achieve static/dynamic reconfigurability. Service-oriented architecture offers a certain degree of reconfigurability due to its support in dynamic composition. When system requirements change, new composition of services can be determined to satisfy the new requirements. However, analysis, especially QoS based analysis, is generally required to make appropriate service selections and service configurations. In this chapter, we discuss the development of QoS-based composition analysis techniques and propose a QoS specification model. The specification model facilitates QoSbased specification of the properties of the Web services and the requirements of the application systems. The composition analysis techniques can be used to analyze QoS tradeoffs and determine the best selections and configurations of the Web services. We develop a composition analysis framework and use the genetic algorithm in the framework for composition decision making. The framework currently supports SOA performance analysis. The details of the genetic algorithm for the framework and the performance analysis techniques are discussed in this chapter.

scholarly journals A Cluster-Based Browsing Model For QoS-Aware Web Service Selection

2021 ◽  
Author(s):  
Kian Farsandaj
Keyword(s):  
Web Services ◽  
Web Service ◽  
Clustering Algorithm ◽  
Service Selection ◽  
Functional Requirements ◽  
Analysis Techniques ◽  
Symbolic Data ◽  
Web Service Selection ◽  
The Web

In the last decade, selecting suitable web services based on users’ requirements has become one of the major subjects in the web service domain. Any research works have been done - either based on functional requirements, or focusing more on Quality of Service (QoS) - based selection. We believe that searching is not the only way to implement the selection. Selection could also be done by browsing, or by a combination of searching and browsing. In this thesis, we propose a browsing method based on the Scatter/Gather model, which helps users gain a better understanding of the QoS value distribution of the web services and locate their desired services. Because the Scatter/Gather model uses cluster analysis techniques and web service QoS data is best represented as a vector of intervals, or more generically a vector of symbolic data, we apply for symbolic clustering algorithm and implement different variations of the Scatter/Gather model. Through our experiments on both synthetic and real datasets, we identify the most efficient ( based on the processing time) and effective implementations.

A Theoretical Foundation of Demand Driven Web Services

2015 ◽  
pp. 392-422
Author(s):  
Zhaohao Sun ◽  
John Yearwood
Keyword(s):  
Web Services ◽  
Social Services ◽  
Service Oriented Architecture ◽  
State Of The Art ◽  
The State ◽  
Cloud Services ◽  
Pivotal Role ◽  
The Internet ◽  
Service Oriented ◽  
The Web

Web services are playing a pivotal role in business, management, governance, and society with the dramatic development of the Internet and the Web. However, many fundamental issues are still ignored to some extent. For example, what is the unified perspective to the state-of-the-art of Web services? What is the foundation of Demand-Driven Web Services (DDWS)? This chapter addresses these fundamental issues by examining the state-of-the-art of Web services and proposing a theoretical and technological foundation for demand-driven Web services with applications. This chapter also presents an extended Service-Oriented Architecture (SOA), eSMACS SOA, and examines main players in this architecture. This chapter then classifies DDWS as government DDWS, organizational DDWS, enterprise DDWS, customer DDWS, and citizen DDWS, and looks at the corresponding Web services. Finally, this chapter examines the theoretical, technical foundations for DDWS with applications. The proposed approaches will facilitate research and development of Web services, mobile services, cloud services, and social services.

Service-Oriented Agents and Meta-Model Driven Implementation

2005 ◽  
pp. 270-291 ◽  
Author(s):  
Yinsheng Li ◽  
Hamada Ghenniwa ◽  
Weiming Shen
Keyword(s):  
Web Services ◽  
Software Agents ◽  
Software Modeling ◽  
Semantic Description ◽  
Implementation Framework ◽  
Meta Model ◽  
Model Driven ◽  
Loosely Coupled ◽  
Dynamic Composition ◽  
Service Oriented

Current efforts have not enforced Web services as loosely coupled and autonomous entities. Web services and software agents have gained different focuses and accomplishments due to their development and application backgrounds. This chapter proposes service-oriented agents (SOAs) to unify Web services and software agents. Web services features can be well realized through introducing software agents’ sophisticated software modeling and interaction behaviors. We present a natural framework to integrate their related technologies into a cohesive body. Several critical challenges with SOAs have been addressed. The concepts, system and component structures, a meta-model driven semantic description, agent-oriented knowledge representation, and an implementation framework are proposed and investigated. They contribute to the identified setbacks with Web services technologies, such as dynamic composition, semantic description, and implementation framework. A prototype of the proposed SOAs implementation framework has been implemented. Several economic services are working on it.

Structural Interoperability as a Basis for Service Adaptability

2012 ◽  
pp. 33-59 ◽  
Author(s):  
José C. Delgado
Keyword(s):  
Web Services ◽  
Data Use ◽  
Complex Data ◽  
Distributed Resources ◽  
Service Oriented ◽  
And Behavior ◽  
The Web

Web Services appeared essentially as an interoperability solution and REST as a closer match to the semantics of protocols such as HTTP. Clearly influenced by the original browsing goals of the Web, these technologies are not native solutions to the service-oriented paradigm, exhibit limitations to interoperability, and behavior has to be implemented in a separate language. Web Services offer a WSDL document to describe them, but assume that complex data use the same schema in both interacting services, which increases their coupling. This chapter discusses interoperability, from the perspective of both the consumer (compliance) and provider (conformance) services, and it argues that compliance is a weaker requirement for service interoperability than conformance and should be the cornerstone to decrease coupling and to favor adaptability. Structural interoperability is used, given that the lifecycles of distributed resources are decoupled. Metrics to quantify adaptability, based on similarity and decoupling, are proposed.

Towards Process Mediation in Semantic Service Oriented Architecture (SSOA)

2011 ◽  
pp. 780-801 ◽  
Author(s):  
Tariq Mahmoud ◽  
Jorge Marx Gómez
Keyword(s):  
Web Services ◽  
Enterprise Resource Planning ◽  
Service Oriented Architecture ◽  
Resource Planning ◽  
The Public ◽  
Digital World ◽  
Digital Community ◽  
Service Oriented ◽  
Semantic Service ◽  
The Web

Nowadays, it becomes very hard for anybody in the digital world to search and find suitable Web Services fit into his/her needs, since there is a huge amount of data on the Web caused by the enormous increasing of the Web providers and Web Services widespread in this digital community, and one of the most difficulties Web Services have to overcome, in the attempt to use the contents of the World Wide Web, is heterogeneity which is caused by the nature of the Web itself, and has two origins: data or public process heterogeneity. So it is highly required in such environment to have an intelligent mechanism in which every user can search according to his/her needs and later on can fulfill it in a semantic way. The authors will focus in this chapter on the public process heterogeneity which describes the behavior of the participants during a conversation, and propose a solution for dealing with it, explaining the functionality of the process mediator developed as a part of the Web Service Execution Environment (WSMX) and its mediation scenario, and will also apply this proposed solution on Federated Enterprise Resource Planning (FERP) system to get the semantic extension from it.

Performance Analysis and Models of Web Traffic

2010 ◽  
pp. 1196-1203 ◽  
Author(s):  
Federico Montesino Pouzols ◽  
Angel Barriga Barros ◽  
Diego R. Lopez ◽  
Santiago Sánchez-Solano
Keyword(s):  
Performance Analysis ◽  
Web Services ◽  
Virtual Organizations ◽  
The Internet ◽  
Virtual Enterprises ◽  
Web Traffic ◽  
Web Based ◽  
Web Technologies ◽  
Analysis Techniques ◽  
Core Components

The Internet and, more specifically, Web-based applications now provide the first-ever global, easy-to-use, ubiquitous and economical communications channel. Most companies have already automated their operations to some extent, which enhances their ability to interact with other companies electronically. With the advent of Web services, the interaction between companies becomes easier and more transparent (Khalaf, Curbera, Nagy, Tai, Mukhi, & Duftler, 2005). Web-based technologies are extensively employed and support core components of virtual and networked organizations. Many of them, including for instance Web-based communities, heavily rely on Web traffic. Additionally, Web technologies play a central role in the technologies for supporting industrial virtual enterprises (VE) being developed by the National Industrial Information Infrastructure Protocols Consortium (NIIIP). Thus, modelling and analysis techniques for Web traffic become important tools for performance analysis of virtual organizations (Malhotra, 2000; Foster, Kesselman, & Tuecke, 2001). This article overviews current models of Web traffic as well as performance analysis of Web-based systems.

Building Highly Dependable Wireless Web Services

2010 ◽  
Vol 8 (4) ◽  
pp. 1-16 ◽  
Author(s):  
Wenbing Zhao
Keyword(s):  
Web Services ◽  
Service Oriented Architecture ◽  
State Of The Art ◽  
Mobile Business ◽  
Business Transactions ◽  
High Dependability ◽  
Service Oriented ◽  
And Performance ◽  
Wireless Mobile ◽  
The Web

In this paper, the authors introduce Web services technology and its applications to mobile business transactions. This paper shows that the Web services technology is a powerful tool to build next-generation e-Commerce applications for wireless mobile devices following the service-oriented architecture. Such an approach would bring significant benefits to organizations involved with e-Commerce. The authors further discuss the importance of ensuring high dependability of Web services and provide a literature review of state-of-the-art techniques that are critical to the implementation of practical and dependable wireless Web services. Finally, research on the design, implementation, and performance evaluation of a fault tolerance framework for wireless Web services are described.

Adaptive Service Choreography Support in Virtual Enterprises

2008 ◽  
pp. 66-75 ◽  
Author(s):  
Adomas Svirskas ◽  
Bob Roberts ◽  
Ioannis Ignatiadis
Keyword(s):  
Web Services ◽  
Service Oriented Architecture ◽  
Virtual Enterprises ◽  
Business Applications ◽  
Service Oriented ◽  
Service Choreography ◽  
Business Function ◽  
Business Protocols ◽  
Usage Context ◽  
The Web

Service Oriented Architecture (SOA) approach in general and the Web services technology in particular enable creation of business applications from independently developed, deployed and owned components called services. A service captures a distinct business function offering some value independently of its usage context. However, it is not enough to have the business functionality of the partners packaged as (Web) services; there is also a need for business-aligned order of interaction between these services a.k.a. business protocols, which can also be reused. The contribution of the chapter is two-fold: it explores reusability of the applicable business protocols in different business scenarios and also suggests possible ways to adapt the implementations of the partners’ services (end-points) to the changes in the business protocols.

scholarly journals Web Services Composition Using Dynamic Classification and Simulated Annealing

2018 ◽  
Vol 12 (11) ◽  
pp. 395
Author(s):  
Issam AlHadid ◽  
Evon Abu-Taieh
Keyword(s):  
Simulated Annealing ◽  
Web Services ◽  
Service Composition ◽  
Business Processes ◽  
Service Oriented Architecture ◽  
Service Level Agreement ◽  
Synchronous Mode ◽  
Services Composition ◽  
Service Oriented ◽  
The Web

Service Oriented Architecture (SOA) introduced the web services as distributed computing components that can be independently deployed and invoked by other services or software to provide simple or complex tasks. In this paper we propose a novel approach to solve the problem of the business processes execution engine web service selection and services composition in the Service Oriented Architecture (SOA) related to the Synchronous mode.  The paper provides a mechanism to improve the web services selection and service composition, using dynamic web services and service composition classification and Simulated Annealing (SA) to satisfy services' requirements expressed as the Service Level Agreement (SLA). The results show that the proposed approach enhanced the services composition by increasing the availability and decreasing the response time to the service composite.

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