WSARCH

2012 ◽  
pp. 352-380 ◽  
Author(s):  
Júlio Cezar Estrella ◽  
Regina Helena Carlucci Santana ◽  
Marcos Jose Santana ◽  
Sarita Mazzini Bruschi
Keyword(s):  
Web Services ◽  
Service Oriented Architecture ◽  
Service Providers ◽  
Evaluation Studies ◽  
Design And Implementation ◽  
Functional Aspects ◽  
Service Oriented ◽  
Execution Platform

This chapter aims at the design and implementation of a service-oriented architecture (SOA), named WSARCH – Web Services Architecture - which allows accessing Web Services using a combination of functional and non-functional aspects of Quality of Service (QoS). These QoS aspects, aiming at evaluating the performance of Web Services in order to achieve QoS in a service-oriented architecture, are identified and discussed. These QoS attributes were mapped to the components participating in a service-oriented architecture with QoS support. The proposed architecture provides the monitoring of service providers and the data obtained are used to locate the most appropriated service. The WSARCH can be used as an analytical platform for purposes of testing Web Services and understanding their behavior as well as an execution platform for building live systems. A prototype for the WSARCH was developed, and it can allow performance evaluation studies being conducted considering different components of the architecture, algorithms, protocols and standards. The proposal WSARCH is inserted into a context where it is important to define the way a SOA focusing on performance shall be designed, since the correct characterization of what to evaluate and how to evaluate.

scholarly journals Accelerated Service Oriented Architecture Implementation of Deduplication Principle

2019 ◽  
Vol 8 (11) ◽  
pp. 3218-3222
Keyword(s):  
Web Services ◽  
Semantic Web ◽  
World Wide ◽  
Service Oriented Architecture ◽  
Service Providers ◽  
Semantic Web Services ◽  
Quality Level ◽  
The World ◽  
Service Oriented

The phrase “Web Services (WSs)” are emerging as a creative scheme for furnishing the services to various immanent devices over the World Wide Web. The hasty intensification of the WSs applications and the availability of the vast count of the Service Providers create the certainty of selecting the “efficient” Service Provider by the consumers. The scenario Deduplication and Quality-of-Service (QoS) swears out as an objective to distinguish various Service Providers (SPs). The process of selecting proficient WSs / SPs, positioning and optimization of WSs Compositions are exigent dimensions of research with momentous entailments for the fruition of the “Web of Services” revelation. The term “Semantic WSs” follows appropriate semantic descriptions of WS functionality and a medium to facilitate programmed cogitating over WS Compositions (WSCs). The persisting model of the Semantic Web Services (SWSs) deals with the intriguing emerges like wretched forecast of best WSs and gemination of services with effective SPs, which heads to Quality level degradation on the Semantic Web. To deal the above identified issues, the anticipated research is planned to construct a model to manipulative the content similarities (semantic), consumption of a mixture of WSs and its corresponding SPs. After assessing these params, all the WSs are stratified on the basis of its consumption. Ultimately, the nominated scheme, selects the best and non duplicated copy of the WSs on the basis of its rating and placed it in the WSC. The process of detecting the duplicate copy would be performed by the Cryptographic Hash value of the Services. From the experimental annotations, it is recognized that our anticipated design amends the functionality of the SWSs in terms of Processor Utilization, Accessing Time, and its Space optimizations

A Novel Physics Inspired Approach for Web Service Composition

2014 ◽  
Vol 11 (2) ◽  
pp. 67-84 ◽  
Author(s):  
Tanveer Ahmed ◽  
Abhishek Srivastava
Keyword(s):  
Web Services ◽  
Web Service ◽  
Service Composition ◽  
Service Oriented Architecture ◽  
Service Providers ◽  
Web Service Composition ◽  
Heterogeneous Services ◽  
Service Oriented ◽  
Service Consumer ◽  
Selection Of

Service oriented architecture has revolutionized the way a traditional business process is executed. The success of this architecture is Indue to the composition of multiple heterogeneous services at runtime. Web service composition is a mechanism where several web services are combined at runtime to build a complex application for a user. It is one of the most sought after processes in the context of semantic web. But, composition of web services at runtime is a difficult task owing to the availability of multiple service providers offering the same functionality. The process if exasperated by due conflicting preferences of a service consumer. In this paper, the authors address the issue of selecting a service based on Quality of Service (QoS) attributes. They utilize concepts customized from physics to create an environment that facilitates the selection of a best service from the set of similar services. The technique not only facilitates the selection of the service with the best QoS attributes, but distributes the load among expeditiously. Here in this paper, the authors concentrate on minimizing and equitably balancing the waiting time for a user. They conduct in silico experiments on multiple workflows to demonstrate the efficacy of the proposed technique to balance load efficiently among similar service offerings.

WSRP, SOA and UDDI

2010 ◽  
Vol 2 (2) ◽  
pp. 38-50
Author(s):  
Tony Polgar
Keyword(s):  
Web Services ◽  
Service Oriented Architecture ◽  
Service Providers ◽  
Low Cost ◽  
Team Development ◽  
Shared Resources ◽  
Enterprise Integration ◽  
Business Partners ◽  
Cost Development ◽  
Service Oriented

Web Services for Remote Portlets (WSRP) provide solutions for implementation of lightweight Service Oriented Architecture (SOA). UDDI extension for WSRP enables the discovery and access to user facing web services provided by business partners while eliminating the need to design local user facing portlets. Most importantly, the remote portlets can be updated by web service providers from their own servers. Remote portlet consumers are not required to make any changes in their portals to accommodate updated remote portlets. This approach results in easier team development, upgrades, administration, low cost development and usage of shared resources. Furthermore, with the growing interest in SOA, WSRP should cooperate with service bus (ESB).In this paper, the author examines the technical underpinning of the UDDI extensions for WSRP (user facing remote web services) and their role in service sharing among business partners. The author also briefly outlines the architectural view of using WSRP in enterprise integration tasks and the role Enterprise Service Bus (ESB).

scholarly journals Quality Prediction of Web Services Based on a Covering Algorithm

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-17
Author(s):  
Ying Jin ◽  
Guangming Cui ◽  
Yiwen Zhang
Keyword(s):  
Web Services ◽  
Web Service ◽  
Service Oriented Architecture ◽  
Quality Prediction ◽  
Important Research ◽  
Novel Approach ◽  
Target User ◽  
Service Oriented ◽  
Better Than

Service-oriented architecture (SOA) is widely used, which has fueled the rapid growth of Web services and the deployment of tremendous Web services over the last decades. It becomes challenging but crucial to find the proper Web services because of the increasing amount of Web services. However, it proves unfeasible to inspect all the Web services to check their quality values since it will consume a lot of resources. Thus, developing effective and efficient approaches for predicting the quality values of Web services has become an important research issue. In this paper, we propose UIQPCA, a novel approach for hybrid User and Item-based Quality Prediction with Covering Algorithm. UIQPCA integrates information of both users and Web services on the basis of users’ ideas on the quality of coinvoked Web services. After the integration, users and Web services which are similar to the target user and the target Web service are selected. Then, considering the result of integration, UIQPCA makes predictions on how a target user will appraise a target Web service. Broad experiments on WS-Dream, a web service dataset which is widely used in real world, are conducted to evaluate the reliability of UIQPCA. According to the results of experiment, UIQPCA is far better than former approaches, including item-based, user-based, hybrid, and cluster-based approaches.

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.

A LOOSELY COUPLED ASPECT LANGUAGE FOR SOA APPLICATIONS

2008 ◽  
Vol 18 (02) ◽  
pp. 243-262 ◽  
Author(s):  
NABOR C. MENDONÇA ◽  
CLAYTON F. SILVA ◽  
IAN G. MAIA ◽  
MARIA ANDRÉIA F. RODRIGUES ◽  
MARCO TÚLIO O. VALENTE
Keyword(s):  
Service Oriented Architecture ◽  
Service Providers ◽  
Preliminary Evaluation ◽  
Software Developers ◽  
Loosely Coupled ◽  
Tightly Coupled ◽  
Service Oriented ◽  
Execution Platform ◽  
Application Developers ◽  
The Impact

The aspect-oriented programming (AOP) paradigm offers software developers with powerful modularization abstractions to help them explicitly separate design concerns at the source code level. However, the impact of AOP in the service-oriented architecture (SOA) paradigm has been dwarfed by the fact that existing AOP solutions are tightly coupled to a particular programming language, middleware system or execution platform. Clearly, this not only restricts the implementation choices available to application developers, but it also clashes with the heterogeneous and loosely coupled nature of SOA. This paper presents the Web Service Aspect Language (WSAL) that seamlessly integrates AOP and SOA concepts, thus avoiding the drawbacks of existing solutions. In WSAL, aspects themselves are freely specified, implemented and executed as loosely coupled web services. This characteristic allows WSAL aspects to be easily woven into the message flow exchanged between service consumers and service providers, in a way that is completely independent from any particular implementation technology. This paper also reports on the implementation and preliminary evaluation of a prototype aspect weaver for WSAL, which is based on an existing web intermediary technology.

WSRP, SOA and UDDI

2012 ◽  
pp. 50-62
Author(s):  
Tony Polgar
Keyword(s):  
Web Services ◽  
Service Oriented Architecture ◽  
Service Providers ◽  
Low Cost ◽  
Team Development ◽  
Shared Resources ◽  
Business Partners ◽  
Cost Development ◽  
Service Oriented ◽  
Local User

Web Services for Remote Portlets (WSRP) provide solutions for implementation of lightweight Service Oriented Architecture (SOA). UDDI extension for WSRP enables the discovery and access to user facing web services provided by business partners while eliminating the need to design local user facing portlets. Most importantly, the remote portlets can be updated by web service providers from their own servers. Remote portlet consumers are not required to make any changes in their portals to accommodate updated remote portlets. This approach results in easier team development, upgrades, administration, low cost development and usage of shared resources. Furthermore, with the growing interest in SOA, WSRP should cooperate with service bus (ESB).In this paper, the author examines the technical underpinning of the UDDI extensions for WSRP (user facing remote web services) and their role in service sharing among business partners. The author also briefly outlines the architectural view of using WSRP in enterprise integration tasks and the role Enterprise Service Bus (ESB).

Design and Implementation of E-Commerce System Based on SOA

2012 ◽  
Vol 433-440 ◽  
pp. 5500-5505
Author(s):  
Lu Feng Wang
Keyword(s):  
Web Services ◽  
Business Process ◽  
Service Oriented Architecture ◽  
Application Software ◽  
Design And Implementation ◽  
System Building ◽  
Depth Study ◽  
Service Oriented ◽  
Software Updates ◽  
Combination Technology

Through the in-depth study on a variety of existing E-Commerce system building technologies, in the use of mature and stable JZEE multi-tier architecture, combined with the emerging Web services technology and Web services dynamic combination technology, this paper designs and implements a comprehensive Enterprise-Class E-Commerce transaction platform based Service-Oriented architecture. This design is simple, flexible and strongly scalable, that is, when the business needs and business process changes, the system just needs to be simply adjusted to complete the application software updates, so it has high practical value.

scholarly journals Considering Quality of a Service in an Intentional Approach

2012 ◽  
pp. 334-351 ◽  
Author(s):  
Assia Ait-Ali-Slimane ◽  
Manuele Kirsch-Pinheiro ◽  
Carine Souveyet
Keyword(s):  
Quality Of Service ◽  
Web Services ◽  
Quantitative Evaluation ◽  
Service Oriented Architecture ◽  
Service Description ◽  
Qualitative And Quantitative ◽  
Service Oriented ◽  
Implementation Level ◽  
Business Practitioners

The success of service-based applications is based on service technologies such as Web services. Nevertheless, the benefits of the Service-Oriented Architecture (SOA) remain mainly at the software level, since business people are often unable to fully exploit its benefits due to their unfamiliarity with such software level technology. The intentional Service-Oriented Architecture (iSOA) suggests a move from the function-driven SOA to intention-driven SOA in order to provide service description understandable by business practitioners. However, such transposition from business to implementation level should also consider Quality of Service (QoS) aspects. In this paper, we propose modeling the Quality of intentional Service (QoiS) by introducing the quality goals and their qualitative and quantitative evaluation. We also propose populating the intentional service registry of the iSOA architecture with the QoiS description.

A Survey of Approaches to Web Service Discovery in Service-Oriented Architectures

2013 ◽  
pp. 107-138
Author(s):  
Marco Crasso ◽  
Alejandro Zunino ◽  
Marcelo Campo
Keyword(s):  
Web Services ◽  
Web Service ◽  
Service Discovery ◽  
Service Oriented Architectures ◽  
Research Directions ◽  
Web Service Discovery ◽  
Functional Aspects ◽  
Service Oriented ◽  
Better Than

Discovering services acquires importance as Service-Oriented Computing (SOC) becomes an adopted paradigm. SOC’s most popular materializations, namely Web Services technologies, have different challenges related to service discovery and, in turn, many approaches have been proposed. As these approaches are different, one solution may be better than another according to certain requirements. In consequence, choosing a service discovery system is a hard task. To alleviate this task, this paper proposes eight criteria, based on the requirements for discovering services within common service-oriented environments, allowing the characterization of discovery systems. These criteria cover functional and non-functional aspects of approaches to service discovery. The results of the characterization of 22 contemporary approaches and potential research directions for the area are also shown.

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