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基于构件的领域工程实现 总被引：3，自引：0，他引：3
本文以软件工程的开发方法为基础,以软件复用为目的,以构件化为目标,总结了领域分析、领域设计、领域实现的方法;详细分析和讨论了领域工程的这三个阶段,并给出了一个具体的实现领域工程的详细过程。 相似文献
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Numerous large applications that have evolved over many years are well‐functioning and reliable, but have severe problems regarding flexibility and reuse. Due to the many fixes that were applied in a system's lifetime, it is often hard to customize, change or exchange system parts. Therefore, it is problematic to migrate such systems to a more flexible architecture or to new technologies. The document archive/retrieval system, discussed in this article, is an example of a large C system that had such problems. As a solution, we will sketch an architectural pattern language that involves patterns well‐suited for a piecemeal migration process. The patterns aim at building and composing highly flexible black‐box component architectures with an object‐oriented glueing layer. We present a re‐engineering case study for the document archive/retrieval system based on these patterns. The patterns are used to wrap the existing C implementations and integrate them with an object system. Moreover, the patterns introduce flexibility hooks into the hot spots of the architecture and let components define their required environment. This enables an easier future evolution of the system. The case study demonstrates a pattern language as an approach for piecemeal legacy migration apart from implementation details. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
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D. W. Walker M. Li O. F. Rana M. S. Shields Y. Huang 《Concurrency and Computation》2000,12(15):1455-1480
This paper describes the functionality and software architecture of a generic problem‐solving environment (PSE) for collaborative computational science and engineering. A PSE is designed to provide transparent access to heterogeneous distributed computing resources, and is intended to enhance research productivity by making it easier to construct, run, and analyze the results of computer simulations. Although implementation details are not discussed in depth, the role of software technologies such as CORBA, Java, and XML is outlined. An XML‐based component model is presented. The main features of a Visual Component Composition Environment for software development, and an Intelligent Resource Management System for scheduling components, are described. Some prototype implementations of PSE applications are also presented. Copyright © 2000 John Wiley & Sons, Ltd. 相似文献
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Component‐oriented software has become a useful tool to build larger and more complex systems by describing the application in terms of encapsulated, loosely coupled entities called components. At the same time, asynchronous programming patterns allow for the development of efficient distributed applications. While several component models and frameworks have been proposed, most of them tightly integrate the component model with the middleware they run upon. This intertwining is generally implicit and not discussed, leading to entangled, hard to maintain code. This article describes our efforts in the development of the GCM/ProActive framework for providing distributed and adaptable autonomous components. GCM/ProActive integrates a component model designed for execution on large‐scale environments, with a programming model based on active objects allowing a high degree of distribution and concurrency. This new integrated model provides a more powerful development, composition, and execution environment than other distributed component frameworks. We illustrate that GCM/ProActive is particularly adapted to the programming of autonomic component systems, and to the integration into a service‐oriented environment. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
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Many computer applications today require some form of distributed computing to allow different software components to communicate. Several different commercial products now exist based on the Common Object Request Broker Architecture (CORBA) of the Object Management Group. The use of such tools, however, often requires the modification of existing systems, rather than the development of new applications. The objective of this research has been to integrate the use of a CORBA tool into an existing engineering design application for the purpose of (1) evaluating the amount of re‐engineering that is involved to effectively integrate distributed object computing into an existing application, and (2) evaluating the use and performance of distributed object computing in an engineering domain, which often requires the transfer of large amounts of information. The results of this work demonstrate that CORBA technology can be easily integrated into existing applications. The ease of the integration as well as the efficiency of the resulting system, however, depends upon the degree of modification that developers are willing to consider in the re‐engineering process. The most transparent approach to the use of CORBA requires less modification and generally produces less efficient performance. The less transparent approach to the use of CORBA can potentially require significant system modification but produce greater performance gains. This work outlines issues that must be considered for the partitioning of functionality between the client and the server, development of an IDL interface, development of client and server‐side wrappers, and support for concurrent, multi‐user access. In addition, this work also provides performance and implementation comparisons of different techniques for the use of wrappers and for the transfer of large data files between the client and the server. Performance comparisons for the incorporation of concurrent access are also presented. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献
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软件构件复用技术综述 总被引：14，自引：12，他引：14
1968年NATO软件工程会议上,Mcilroy在其论文“大量生产的软件构件”中首次提出了复用这一概念,从此,人们围绕这一问题进行了大量的研究和实践活动。近年来,随着面相对象技术的出现并逐渐成为主流,基于软件构件的复用技术研究又重新成为热点,被视为解决软件危机现实可行的重要方法之一。介绍了构件的概念以及国内外在构件复用技术这一领域比较成功的研究和实践活动。 相似文献
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Jim Buckley Andrew P. LeGear Chris Exton Ross Cadogan Trevor Johnston Bill Looby Rainer Koschke 《Journal of Software: Evolution and Process》2008,20(2):107-134
Design abstractions such as components, modules, subsystems or packages are often not made explicit in the implementation of legacy systems. Indeed, often the abstractions that are made explicit turn out to be inappropriate for future evolution agendas. This can make the maintenance, evolution and refactoring of these systems difficult. In this publication, we carry out a fine‐grained evaluation of Reflexion Modelling as a technique for encapsulating user‐targeted components. This process is a prelude to component recovery, reuse and refactoring. The evaluation takes the form of two in vivo case studies, where two professional software developers encapsulate components in a large, commercial software system. The studies demonstrate the validity of this approach and offer several best‐use guidelines. Specifically, they argue that users benefit from having a strong mental model of the system in advance of Reflexion Modelling, even if that model is flawed, and that users should expend effort exploring the expected relationships present in Reflexion Models. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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Rainer Koschke 《Journal of Software: Evolution and Process》2003,15(2):87-109
Software visualization is concerned with the static visualization as well as the animation of software artifacts, such as source code, executable programs, and the data they manipulate, and their attributes, such as size, complexity, or dependencies. Software visualization techniques are widely used in the areas of software maintenance, reverse engineering, and re‐engineering, where typically large amounts of complex data need to be understood and a high degree of interaction between software engineers and automatic analyses is required. This paper reports the results of a survey on the perspectives of 82 researchers in software maintenance, reverse engineering, and re‐engineering on software visualization. It describes to which degree the researchers are involved in software visualization themselves, what is visualized and how, whether animation is frequently used, whether the researchers believe animation is useful at all, which automatic graph layouts are used if at all, whether the layout algorithms have deficiencies, and—last but not least—where the medium‐term and long‐term research in software visualization should be directed. The results of this survey help to ascertain the current role of software visualization in software engineering from the perspective of researchers in these domains and give hints on future research avenues. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
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面向客户需求ERP产品可重构开发模型研究 总被引：4，自引：0，他引：4
目前ERP系统在开发中主要存在两个问题:一是ERP产品在开发的过程中存在大量的重复工作,系统的开发周期比较长;二是ERP产品的刚性太强,系统的柔性差,适应性不强。针对上述问题,文章提出了客户需求驱动,可重构ERP软件开发模型,阐述了基于客户需求分析的动态企业建模、可重构ERP软件开发的主要技术和系统构建方法。 相似文献
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构件的插拔与替换是CBSD实现组装开发、支持定制和演化的基本机制,基于行为协议的构件替换性分析与验证是CBSD的核心研究课题。基于有穷自动机理论和面向服务软件构件的特点,提出了构件行为自动机模型以描述构件的行为协议,定义了构件行为替换性的概念体系,以增进软件构件的复用,开发了构件行为替换性的验证方法,以支持构件行为替换性验证的自动执行。 相似文献
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软构件技术在信息系统开发中的应用研究 总被引：8，自引：0，他引：8
以高等院校教务管理系统的开发为背景，提出了一个基于软构件技术，适合于小型应用软件开发的过程模型和组织模型，介绍了基于主题文档的分析方法在高等院校教务管理中的应用，提出了一个基于原子文档关联矩阵发现系统中大粒度构件的方法，对系统中的构件进行了层次划分，给出了高等院校教务管理系统中的构件抽取实例，并探讨了利用构件组装应用软件的方法和过程。 相似文献
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基于构件的软件开发,是软件工程领域一个重要的方法,其中构件模型是该方法的理论基础.目前,适用于基于对等结构的分布式应用软件开发的构件模型尚不多见.针对对等应用软件的特点,首先在给出一个开发框架的前提下,对对等应用软件进行了构件特征分析,并将基于该框架开发的对等应用软件系统所涉及到的构件形态,归结为可迁移构件、轻量级构件和耦合容器构件3类,然后在此基础上提出一个支持对等应用的构件模型,并对构件模型中语义和语法进行了表述,最后介绍了该构件模型的生成与部署、合成与组装、查找与匹配、通讯与协作、以及相关对比等方面的研究工作. 相似文献
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Reuse-based software production technology 总被引：4，自引：0，他引：4
Software reuse is viewed as a key technology to improve software product quality and productivity. This paper discusses a series of technologies related with software reuse and software component technology: component model, which describes component's essential characteristics; component acquisition technology, of which domain engineering is the main approach; component management technology, of which component library is the kernel; application integration and composition technology, of which application engineering is the main approach; software evolution technology, of which software reengineering is the main approach, etc. This paper introduces the software development environment: JadeBird Software Production Line System, which effectively integrates the above-mentioned technologies. 相似文献
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Software components have emerged to ease the assembly of software systems. However, updates of systems by substitution or upgrades of components demand careful management due to stability risks of deployed systems. Replacement components must be properly evaluated to identify if they provide the expected behaviour affected by substitution. To address this problem, this paper proposes a substitutability assessment process in which the regular compatibility analysis is complemented with the use of black‐box testing criteria. The purpose is to observe the components' behaviour by analysing their internal functions of data transformation, which fulfils the observability testing metric. The approach is conceptually based on the technique Back‐to‐Back testing. When a component should be replaced, a specific Test Suite TS is built in order to represent its behavioural facets, viz. a Component Behaviour TS. This TS is later exercised on candidate upgrades or replacement components with the purpose of identifying the required compatibility. Automation of the process is supported through the testooj tool, which constrains the conditions and steps of the whole process in order to provide a rigorous and reliable approach. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
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框架是软件复用研究中的重要课题之一，但是框架在不同的领域中有不同的特性，需要将框架的特性与共性分离，将共性部分单独加以实现并复用，使得研究人员的注意力集中在各个领域的特性部分．本文提出并研发了一个基于构件和双总线的分层微内核结构的基础设施——FreeScaler．该基础设施属于框架共性的实现，具有高度的开放性和灵活性，为科研试验和应用开发提供了一个快捷易用的平台．文中重点介绍了FreeScaler的设计思路、整个系统的模型和体系结构，阐释其关键特性．并展示了基于FreeScaler的实际应用． 相似文献
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基于构件的应用软件系统的体系结构及其开发模型 总被引：38，自引：0，他引：38
文中介绍了一个基于构件的应用软件系统的体系结构及共开发模型。基于领域分析方法抽取出的领域构件，使体系结构具有可扩展性。系统能随着需求的变化作相应的修正。解决了本系统在同一领域的复用问题。 相似文献
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基于构件的软件工程(component based software engineering,简称CBSE)能够有效地提高软件开发的质量和效率.构件组装和组装推导(compositional reasoning)是CBSE的关键技术.基于软件构件的特点,借鉴进程代数中进程构造的方法,提出6种构件组装机制,能够灵活、简便地集成软件构件,并主张在构件组装的同时进行接口组装,通过生成功能更强、抽象级别更高的复合接口,提高构件组装的抽象级别和粒度.同时,基于Wright的形式化规约软件体系结构的研究,给出了复合构件和复合接口的组装推导算法,为系统行为的形式化分析、验证和仿真奠定了基础. 相似文献