服务管理综述

1 引言随着网络技术和通信技术的迅速发展,Web服务逐渐成熟,在应用广度和应用深度方面都有突破,Web服务也从简单的信息发布、信息共享逐渐演变成智能的多功能服务。基于Web的服务管理是在Web服务功能逐渐智能化的基础上提出的。网络上的服务越来越多,处于无序状态,用户对Web服务的要求越来越多样化,有效组织好现有网络的资源,提供用户满意服务,就成为Internet发展必须解决的问题。 Web服务应由内容主导型(Content-Central)转向服务主导型(Service-Central)。由基础服务转向智能服务。近年来围     

Web服务业务流程执行语言(BPEL4WS)引擎架构的研究

论文提出了一个Web服务业务流程执行语言(BPEL4WS)的引擎架构。该架构被设计为跨平台的中间件结构,它支持BPEL4WS业务流程的运行、查询、管理,提供了多用户的BPEL4WS流程调用接口。架构采用了可扩展的模块化设计,使它可以满足今后的功能扩充。论文还将对BPEL4WS做一些介绍。     

面向Web服务的管理体系架构

Web服务作为一种新型的分布式计算和处理的技术,为实现大范围的信息系统之间的通信和交互提供了条件.根据Web服务本身的特点,提出了一个面向Web服务的管理体系架构.并举例说明如何应用此架构解决实际应用中Web服务管理的问题.     

An XML-based Quality of Service Enabling Language for the Web

In this paper, we introduce an XML-based hierarchical QoS markup language, called HQML, to enhance distributed multimedia applications on the World Wide Web (WWW) with quality of service (QoS) capability. The design ofHQML is based on two observations: (1) the absence of a systematic QoS specification language, that can be used by distributed multimedia applications on the WWW to utilize the state-of-the-art QoS management technology and (2) the power and popularity of XML to deliver richly structured contents over the Web. HQML allows distributed multimedia applications to specify all kinds of application-specific QoS policies and requirements. During runtime, the HQML Executor translates the HQML file into desired data structures and cooperates with the QoS proxies that assist applications in end-to-end QoS negotiation, setup and enforcement. In order to make QoS services tailored toward user preferences and meet the challenges of uncertainty in the distributed heterogeneous environments, the design of HQML is featured as interactive andflexible . In order to allow application developers to create HQML specifications correctly and easily, we have designed and developed a unified visual QoS programming environment, called QoSTalk. In QoSTalk, we adopt a grammatical approach to perform consistency check on the visual QoS specifications and generate HQML files automatically. Finally, we introduce the distributed QoS compiler, which performs the automatic mappings between application- and resource-level QoS parameters to relieve the application developer of the burden of dealing with low-level QoS specifications.     

基于Web服务的联合作战管理语言

综合军事信息系统CAISR和仿真系统之间的互操作性不强是由来已久的一个问题,作战管理语言的出现为解决这一问题提供了新的方法.作战管理语言是一种无歧义的语言,用于指挥和控制作战人员和武器装备执行军事行动,并能提供态势感知和全局共享的可操作的态势图.Web服务提供了一种新的分布式仿真模式,支持互操作性和重用性.介绍了作战管理语言和Web服务技术,分析了在Web服务支持下应用JBML实现仿真系统和CAISR的互连.在网络服务中扩展的联合作战管理语言将能更好地改进军事系统问的互操作性.     

面向Web服务自动集成的目标描述语言

提出了目标驱动的Web服务自动集成协议栈来实现过程的自动建模;基于本体描述语言OWL,开发了位于集成协议栈最高一层的目标描述语言,来描述需要实现的目标、目标之间的关系以及实现目标的各种约束,并提出在目标描述中不一致的检测方法。目标描述语言是实现Web服务自动集成的第一步工作。     

高职学院教师评价网站设计与开发

教师评价是高等职业教育教学管理中的重要环节,正确、客观、开放的教师评价体系是促进高等职业学院教师的自我实现、自我改进以及师生互动交流的重要保障。以校园网平台为基础,进行了教师评价网站的SQLServer2005数据库设计,利用ASP.NET和C#设计与开发了教师评价网站。     

Web Service Composition Using a Deductive XML Rule Language

This paper describes a knowledge-based Web Service composition system, called SWIM, which is based on the Service Domain model. Service Domains are communities of related Web Services that are mediated by a single Web Service, called the Mediator Service, which functions as a proxy for them. When a requestor sends a message to the Mediator Service one or more of the related Web Services are selected to dispatch the message and the results returned are aggregated to a single answer to the requestor. Mediator Services can be further composed to more complex Mediator Services that combine several selection and aggregation algorithms among many heterogeneous web services. The system utilizes the X-DEVICE deductive XML rule language for defining complex algorithms for selecting registered web services, combining the results, and synchronizing the workflow of information among the combined web services in a declarative way. In the paper, we demonstrate the flexibility and expressibility of our approach for composing Web Services using several e-business examples, covering most of the workflow patterns found in a comprehensive workflow management system (van der Aalst et al., Distributed and Parallel Databases, vol. 14, no, 1, pp. 5–15, 2003).     

Graphic applications of the Standard Generalized Markup Language (SGML)

The Standard Generalized Markup Language (SGML) is a language for representing document structure. This paper discusses ways in which the SGML language might be used to represent graphic as well as textual contents of a document. By using SGML markup for both graphics and text, a document processing application can achieve a more uniform treatment and tighter coupling between these two types of materials.     

基于WSDM的Web服务管理系统的研究

提出了基于WSDM的Web服务管理体系结构,并定义了一个面向服务架构管理环境下自项向下的故障分析机制.该Web服务管理系统能够通过WSDM管理服务对基础架构和Web服务本身进行有效地管理,解决了跨不同管理域的管理集成难题.故障分析机制通过一种粗粒度的性能量测方法实现了自顶向下的故障管理功能.     

基于Web Services服务管理系统的研究

提出了基于Web Services的服务管理体系结构,并设计和实现了基于XML服务管理信息模型和基于SOAP服务管理协议。该系统能够对跨不同管理域的服务进行有效的管理和对服务管理系统进行灵活的配置。通过用XPath表达式指定范围和过滤规则,有效地共享跨不同管理域的服务管理信息,通过XPath表达式指定的过滤规则支持较细粒度的事件通知,解决了跨不同管理域间实现服务管理的难题。     

一个面向汽车零配件管理的Web Service

Web Service是一种基于网络服务的技术。本文基于Web Service的思想,以JSP网页技术作为技术实现,开发了一个小型的汽车零配件管理系统,利用Web Service技术的众多优点来提高汽车零配件管理的效率。此系统能够及时地提供准确的信息给决策者,使其能做出正确的商业决策。     

达梦数据库Web服务技术研究

本文提出了一种将数据库同Web服务技术相结合的方法,一方面使得数据库可以将其存储的数据以Web服务的形式提供给外部使用,另一方面也可以在数据库内部直接使用SQL语句或存储过程调用外部的Web服务对数据进行处理或取得数据,该方法具有使得数据库能够不依赖应用程序而直接同Web服务进行交互的特点。     

一个基于服务请求语言的统一Web服务框架

提出一种基于服务请求语言的统一Web服务框架UWSF。该框架通过统一的服务发布构件对外提供Web服务,并以服务项为单位进行组织,客户端通过对服务项的灵活组合获得各种定制的服务。引入服务请求语言作为客户端服务请求以及交互策略的描述手段。服务请求在服务端解释执行,使得双方的交互过程能够在会话环境中进行,并且减少了由于中间结果传榆造成的带宽占用。服务端执行基于状态图的流程级交互控制以及基于权限检查接口的服务项级权限控制,保证了会话过程的合法性与完整性。     

Web Service在预算管理系统中的应用

预算管理一直是企业信息化过程中的难点,使用WebService技术来构建预算管理系统,可以很好的与其它相关系统互相交互数据,打破系统与系统之间的隔阂,提高效率。     

基于SOAP协议的Web Service 安全基础规范(WS-Security)

讨论了WebService现有安全解决方案存在的问题，阐述了WS－Security规范的内容和架构，以及对此的解决方法，随后给出了一个在WS－Security框架内进行安全信息交换的实例；最后，介绍了WS－Security现有的实现以及未来的发展方向。     

A formal model of the Semantic Web Service Ontology (WSMO)

Semantic Web Service, one of the most significant research areas within the Semantic Web vision, has attracted increasing attention from both the research community and industry. The Web Service Modelling Ontology (WSMO) has been proposed as an enabling framework for the total/partial automation of the tasks (e.g., discovery, selection, composition, mediation, execution, monitoring, etc.) involved in both intra- and inter-enterprise integration of Web services. To support the standardisation and tool support of WSMO, a formal model of the language is highly desirable. As several variants of WSMO have been proposed by the WSMO community, which are still under development, the syntax and semantics of WSMO should be formally defined to facilitate easy reuse and future development. In this paper, we present a formal Object-Z formal model of WSMO, where different aspects of the language have been precisely defined within one unified framework. This model not only provides a formal unambiguous model which can be used to develop tools and facilitate future development, but as demonstrated in this paper, can be used to identify and eliminate errors present in existing documentation.