Web Services and Performance: For eBay Item Visibility Framework

2014 ◽  
Author(s):  
James Shen
Keyword(s):  
Web Services ◽  
And Performance

Mobile Web Services for P2P Computing

2010 ◽  
pp. 133-157
Author(s):  
Fahad Aijaz
Keyword(s):  
Web Services ◽  
Performance Optimization ◽  
Mobile Nodes ◽  
P2p Computing ◽  
Mobile Web Services ◽  
Mobile Web ◽  
Service Oriented Computing ◽  
Service Oriented ◽  
Design Characteristics ◽  
And Performance

The Information Technology (IT) and Telecommunication (TelCo) sectors face enormous integration challenges, due to the prominent heterogeneity in existing systems. Service-oriented computing tackles such challenges by providing a fundamental platform that facilitates the convergence of distinct domains based on Web Services (WSs). With the mobility and technological advancements, service-oriented computing has been pushed towards the mobile sector enabling P2P Mobile Web Services (MobWSs) provisioning. In this work, we investigate the interaction, architecture and design characteristics of MobWSs for P2P computing. Here, the two MobWS interaction strategies are presented followed by the architectural discussion, enfolding server and client side components, of a resource-oriented MobWS framework. We follow REST design principles to propose an efficient way of architecting P2P MobWS systems, as an alternative to SOAP, enabling significant payload reduction and performance optimization in mobile servers. The detailed performance evaluation is also presented and compared to SOAP based on real-time measurements. By analyzing performance characteristics, we show that REST is a promising technique to architect P2P MobWS systems for resource-constraint mobile nodes.

Managing Granularity in Design and Implementation of Geospatial Web Services

2011 ◽  
pp. 18-35 ◽  
Author(s):  
Elias Z. K. Ioup ◽  
John T. Sample
Keyword(s):  
Web Services ◽  
Data Storage ◽  
User Needs ◽  
Design Decisions ◽  
Design And Implementation ◽  
Performance Requirements ◽  
And Performance ◽  
Geospatial Services ◽  
Geospatial Web Services

Granularity is often ignored when designing geospatial Web services. Choices relating to granularity affect service interfaces, data storage and organization, and XML format design. This chapter highlights the importance of analyzing usage and performance requirements when deciding on granularity choices in the design of geospatial Web services. Often, instead of making design decisions based on these requirements, geospatial services are implemented using default, commonly used techniques which may reduce performance, increase complexity, or fail to fully meet user needs. This chapter discusses the importance of granularity in designing and implementing geospatial Web services and provides common examples that highlight the different approaches to granularity which are available.

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.

scholarly journals QoS Measurement of Workflow-Based Web Service Compositions Using Colored Petri Net

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Hossein Nematzadeh ◽  
Homayun Motameni ◽  
Radziah Mohamad ◽  
Zahra Nematzadeh
Keyword(s):  
Web Services ◽  
Web Service ◽  
Petri Net ◽  
Process Model ◽  
Service Oriented Architecture ◽  
Colored Petri Net ◽  
Service Oriented ◽  
Business Process Execution ◽  
And Performance

Workflow-based web service compositions (WB-WSCs) is one of the main composition categories in service oriented architecture (SOA). Eflow, polymorphic process model (PPM), and business process execution language (BPEL) are the main techniques of the category of WB-WSCs. Due to maturity of web services, measuring the quality of composite web services being developed by different techniques becomes one of the most important challenges in today’s web environments. Business should try to provide good quality regarding the customers’ requirements to a composed web service. Thus, quality of service (QoS) which refers to nonfunctional parameters is important to be measured since the quality degree of a certain web service composition could be achieved. This paper tried to find a deterministic analytical method for dependability and performance measurement using Colored Petri net (CPN) with explicit routing constructs and application of theory of probability. A computer tool called WSET was also developed for modeling and supporting QoS measurement through simulation.

scholarly journals Proactively Composing Web Services as Tasks by Semantic Web Agents

2011 ◽  
pp. 217-246
Author(s):  
Vadim Ermolayev ◽  
Natalya Keberle ◽  
Oleksandr Kononenko ◽  
Vagan Terziyan
Keyword(s):  
Web Services ◽  
Semantic Web ◽  
Web Service ◽  
Asset Management ◽  
Document Retrieval ◽  
Mobile Service ◽  
Layered Architecture ◽  
Dynamic Composition ◽  
Ongoing Work ◽  
And Performance

This chapter presents the framework for agent-enabled dynamic composition of Semantic Web services. The approach and the framework have been developed in several research and development projects by ISRG and IOG. The core of the methodology is the new understanding of a Semantic Web service as a capability of an intelligent software agent supplied with the proper ontological description. It is demonstrated how diverse Web services may be composed and mediated by dynamic coalitions of software agents collaboratively performing tasks for service requestors. Middle agent layer is introduced to conduct the transformation of a Web service request to the corresponding task, agent-enabled cooperative task decomposition and performance. Discussed are the formal means to arrange agents’ negotiation, to represent the semantic structure of task-activity-service hierarchy and to assess fellow-agents’ capabilities and credibility factors. It is argued that the presented technique is applicable to various application domains. Presented is the ongoing work on designing and implementing agent-based layered architecture for intelligent rational information and document retrieval. Finally, the discussion of the OntoServ.Net framework for the development of P2P mobile service infrastructures for industrial asset management provides the extension of the Web service composition approach.

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