A service-oriented city portal framework and collaborative development platform

Cities are being equipped with multiple information systems to provide public services for city officials, officers, citizens, and tourists. There have been concerns with efficient service implementation and provision, e.g., data islands and function overlaps between systems and applications. Service-oriented portals are efficient at facilitating information sharing and collaborative work between city systems and users. The goal of this research is to make cities responsive, agile and to provide composite services efficiently and cost efficiently. A service-oriented framework for city portals is proposed to design, integrate and streamline city systems and applications. A model driven collaborative development platform of the proposed framework was developed for service-oriented digital portals. The architecture and implementation issues of the platform are discussed. The service identification policies are discussed within the framework. A case study has been developed and evaluated on the platform to provide a composite service, i.e., a traffic search service on a city portal.     

Industrial application integration using the unification approach to agent-enabled semantic SOA

Within the enterprise, information infrastructure as the mean to bring together different software applications is the key component to enable cooperation and information and knowledge exchange in an open-distributed environment. The paper addresses the issues of industrial application integration in business processes using agent-enabled service-oriented architectures (SOA). In this paper, we show that agent-enabled SOA can play an important role for service integration. Our framework combines Web services (WS) and intelligent agent technologies orchestrated by a business process management system. This framework looks for unification of agent and WS service models, is grounded in a semantic SOA of an agent platform and is supported by the Component Agent Platform Over .NET Framework agent platform tools. We describe the architecture and illustrate the approach by an industrial application scenario from petroleum wells’ drilling.     

State of the art: business service and its impacts on manufacturing

The world is coming into the time what is known as the Service Era. Various business services are gradually being separated from manufacturing industries. In this paper, Business service concepts, features and classifications are firstly introduced, and the evolution trends of business service are also briefly summarized. The state-of-the-art of research and development work on business service is overviewed, in three different domains, i.e., the service economy, service systems and service-oriented computing. In particular, main research topics in a new discipline named Service Science, Management and Engineering are mentioned. Business service impacts on manufacturing and new challenges in business transformation from manufacturing to service are discussed. Finally, three case studies on business services are given.     

An agent-based service-oriented integration architecture for collaborative intelligent manufacturing

The rapidly changing needs and opportunities of today's global market require unprecedented levels of interoperability to integrate diverse information systems to share knowledge and collaborate among organizations. The combination of Web services and software agents provides a promising computing paradigm for efficient service selection and integration of inter-organizational business processes. This paper proposes an agent-based service-oriented integration architecture to leverage manufacturing scheduling services on a network of virtual enterprises. A unique property of this approach is that the scheduling process of an order is orchestrated on the Internet through the negotiation among agent-based Web services. A software prototype system has been implemented for inter-enterprise manufacturing resource sharing. It demonstrates how the proposed service-oriented integration architecture can be used to establish a collaborative environment that provides dynamic resource scheduling services.     

Applying CIM-to-PIM model transformations for the service-oriented development of information systems

Context

Model-driven approaches deal with the provision of models, transformations between them and code generators to address software development. This approach has the advantage of defining a conceptual structure, where the models used by business managers and analysts can be mapped into more detailed models used by software developers. This alignment between high-level business specifications and the lower-level information technologies (ITs) models is crucial to the field of service-oriented development, where meaningful business services and process specifications are those relevant to real business scenarios.

Objective

This paper presents a model-driven approach which, starting from high-level computational-independent business models (CIMs) - the business view - sets out guidelines for obtaining lower-level platform-independent behavioural models (PIMs) - the information system view. A key advantage of our approach is the use of real high-level business models, not just requirements models, which, by means of model transformations, helps software developers to make the most of the business knowledge for specifying and developing business services.

Method

This proposal is framed in a method for service-oriented development of information systems whose main characteristic is the use of services as first-class objects. The method follows an MDA-based approach, proposing a set of models at different levels of abstraction and model transformations to connect them.

Results

The paper present the complete set of CIM and PIM metamodels and the specification of the mappings between them, which clear advantage is the support for the alignment between high-level business view and ITs. The proposed model-driven process is being implemented in an MDA tool. A first prototype has been used to develop a travel agency case study that illustrates the proposal.

Conclusion

This study shows how a model-driven approach helps to solve the alignment problem between the business view and the information system view that arises when adopting service-oriented approaches for software development.     

面向服务架构的电子商务互操作性测评研究

以ehXML电子商务标准规范为研究实例,基于面向服务架构的思想和方法,提出了分层的电子商务互操作性测评保证体系,并着重论述了电子商务消息服务层的互操作性保证方法,包括服务功能的划分、测评过程模型和测评检验标准,最后通过一个消息服务层的互操作性测评实例说明了该方法的应用。     

农产品电子商务发展中的问题与对策

我国农产品电子商务主要有两种类型即政府办的供求信息服务型和各经济实体办的商务服务型，目前还处于初期阶段。本文简述了农产品电子商务发展过程中的几点技术、观念问题，并提出相关解决对策。     

A service-oriented architecture for coupling web service models using the Basic Model Interface (BMI)

Service-oriented approach for model coupling is gradually gaining momentum. By leveraging the World Wide Web, the service-oriented approach lowers the interoperability barrier of integrating models in terms of programming languague and operating system. While such paradigm has been applied to integrate models wrapped with some standard interfaces, this paper considers the Basic Model Interface (BMI) as model interface. The advantages of BMI are that it (1) enrich the semantics of variable names, and (2) is framework-agnostic. We exposed the BMI-enabled models through web services. Then, a smart modeling framework, the Experimental Modeling Environment for Linking and Interoperability (EMELI), was enhanced into a web application (i.e., EMELI-Web) to integrate the BMI-enabled web service models. By implementing the whole orchestration in coupling TopoFlow components, we demonstrate that BMI helps connect web service models by reducing the heterogeneity of variable names, and EMELI-Web makes it convenient to couple BMI-enabled web service models.     

搭建式软件开发技术研究与应用

为适应软件开发对业务敏捷性和即时构造性的新要求,采用面向服务的思想,对搭建式软件开发理论和技术进行了研究和实现。与已有的开发模式相比,搭建式开发技术的优势在于它能将工作流、W ebG IS集成到一个面向服务的可视化的搭建平台中。通过电子政务系统的搭建过程表明,搭建式开发技术具有按需、即时、实用的特点,增强了企业的竞争优势。     

基于SOA的交通信息整合系统研究

SOA是一种面向服务的体系架构,可有效地支撑交通信息服务的开发与应用。本文首先阐述了SOA的内涵、模型结构和主要特征;然后分析了基于SOA的交通信息服务的系统架构和流程;最后通过对新疆交通信息整合服务平台建设的实例研究,可以看到采用基于SOA的Web服务技术来整合异构的交通信息数据的方法取得了很好的效果。     

面向服务企业应用与商务伙伴业务集成研究与实现

提出了面向服务的企业应用与商务伙伴进行业务集成需要将基于企业服务总线的资源集成基础设施和业务流程集成方法结合起来,给出了一个通用的企业服务总线的参考模型,并对三种业务流程集成方法进行了分析和比较。通过一个基于Weblogic面向服务开发平台构建的企业门户应用中业务集成的实例,验证了基于企业服务总线与ebXML、RosettaNet或BPEL交互的可行性和优越性。     

A model-driven framework for enterprise service management

With a steady pace of adoption of service-oriented architecture, enterprises have made significant progresses in implementing various kinds of Web services and converting existing applications to service-oriented architecture. As a significant number of services have been put into actual use, many service-oriented enterprises are faced with the problem of how to manage these services efficiently. In this paper, we propose a model-driven framework for a more efficient management of these services. In this framework, the creation and maintenance of enterprise integration solutions are modeled by flows, finite state machines (FSMs), role-based access control (RBAC) among other formal systems models as well as appropriate decision models. For instance, each enterprise integration solution would be modeled as composite services that can be described by respective flow, FSM and RBAC models. These solution models can then be stored, and later retrieved for the execution of these composite services. Furthermore, formal systems and decision models are also used to maintain and update these service-oriented solutions to improve the efficiency and quality of service management by taking advantage of the underlying service-oriented architecture.     

Service vulnerability scanning based on service-oriented architecture in Web service environments

Web services are becoming the critical components of business application, but they are often invoked with critical software and application bugs that can be explored by malicious users. Because the existing centralized vulnerability scanning systems often face performance bottleneck because of huge amount of tasks, a novel service vulnerability scanning scheme is high desirable. In this paper, we propose a service vulnerability scanning scheme based on service-oriented architecture (SoA) in Web service environments. The scanning scheme contains three components, i.e., domain-oriented distributed architecture, service providing mode based on SoA and hierarchical strategy scheduling model. The hierarchical strategy scheduling model is the key of the scanning scheme, which is used to solve the problems of distributed scheduling management in vulnerability scanning process for Web service environments. We conduct a centralized scanner to compare our scheme with other schemes by the implement of prototype system. Experimental results show that our proposed scheme outperforms other schemes with respect to time cost, accuracy and load.     

A View Based Analysis on Web Service Registries

Web services registries are a cornerstone for the emerging service-oriented architecture and constitute a critical resource for Web services. We systematically illustrate and evaluate current registries and compare different approaches regarding their architectures and data models in the context of two views: the human and Web service based views. We use these views to show the different requirements and to illustrate the different abstractions when comparing Web service registries. The human view on Web service registry architectures is illustrated with the help of a case study. The Web service view on Web services registry architectures is illustrated from a software-service point of view. The data model of Web service registries is described in detail from a machine based view. The corresponding human view is described from an abstract level. Web service publishing and discovery are compared from a human and a Web service based view. Finally, we present a working example that uses our methodology to compare different Web service registries and to explain the different views introduced in this paper. Recommended by: Dimitrios Georgakopoulos     

Style-based modeling and refinement of service-oriented architectures

Service-oriented architectures (SOA) provide a flexible and dynamic platform for implementing business solutions. In this paper, we address the modeling of such architectures by refining business-oriented architectures, which abstract from technology aspects, into service-oriented ones, focusing on the ability of dynamic reconfiguration (binding to new services at run-time) typical for SOA.The refinement is based on conceptual models of the platforms involved as architectural styles, formalized by graph transformation systems. Based on a refinement relation between abstract and platform-specific styles we investigate how to realize business-specific scenarios on the SOA platform by automatically deriving refined, SOA-specific reconfiguration scenarios.Research partially supported by the European Research Training Network SegraVis (on Syntactic and Semantic Integration of Visual Modelling Techniques)     

支持服务行为和质量的面向服务软件开发

面向服务的软件开发方法减少了开发应用程序的时间和复杂度。当前面向服务架构中的服务注册和发现主要关注于服务的接口描述和静态属性,却较少考虑服务行为和服务质量。对服务行为即外部可见的操作序列的忽视,可能导致服务产生运行时的异常和错误;忽视服务质量即其运行时的质量信息,则可能导致系统运行的低效。本文提出了一种扩展的面向服务的软件开发过程,探宄服务交互过程中其行为一致和质量匹配。在面向服务的组件模型OSGi平台上,采用动态AOP技术,设计了一种支持服务行为和服务质量的中间件系统。该系统不但保证服务发现的调用一致性和服务替换的观察一致性,而且支持对服务运行时操作行为的检测和服务质量信息的收集,从而保证选择最佳的服务实现,提高应用系统的运行效率。     

面向服务的软件体系结构的形式化

用形式规格说明语言Z对面向服务这样一种新出现的分布式软件体系结构进行形式化，克服了原先面向服务体系结构的非形式化描述中的限制，为更好地进行面向服务的分布式软件开发提供了指导模型。     

基于CAFISE Framework的高适应性面向服务软件开发

在企业及电子政务应用中,由资源分布异构及需求动态变化而产生的问题越来越严重,如何让应用快速适应这些变化一直是人们关注的一个研究难题.首先给出了一个面向服务的支持业务端编程的适应性软件结构框架CAFISE(convergent approach for information system evolution)Framework,然后给出了基于该框架的面向服务的适应性软件开发方法.CAFISE Framework对异构资源的服务化、业务化及开放动态的面向服务软件体系结构提供了较好的支持.基于该结构框架的开发方法,从对影响软件的环境要素分析入手,通过质量属性驱动的体系结构分析,重点针对应用要适应的变化进行结构设计,最终通过以体系结构为基础的业务端编程,实现面向服务应用的即时开发与演化.在实际项目中的使用及实验证明:用该框架和方法开发的面向服务应用,能够较好地适应异构资源的动态变化及用户业务变更,能以较低的代价实现企业及电子政务面向服务应用的持续演化.     

Midland: a service-oriented cluster computing infrastructure

Midland is a service-oriented software infrastructure that enables the clustering of arbitrarily large collections of computing resources. The resulting clusters may be integrated to form an open, dynamically configurable computational grid system where each cluster defines a self-reliant and independent management domain. Web Services make up the primary integration mechanism both at the cluster and grid levels, respectively. This is complemented by a light XML based messaging protocol exclusively used for cluster bound interactions. The paper describes Midland’s architecture, and the service-oriented approach taken to develop the associated resource management mechanisms. It also includes an exposition of the model of service capacity which is one of the enablers of the service-centric strategy underlying the cluster management mechanisms. The operational performance of Midland is illustrated experimentally in the context of a Grid test-bed comprising three clusters. The experimental results highlight the performance of the model of service capacity as well as some aspects of Midland operational performance.