基于构件的面向项目评审领域应用框架技术研究

软件复用是在软件开发过程中避免重复劳动的解决方案,但要设计在许多领域都通用的可复用业务组件是很困难的,而面向领域的复用是在一个特定应用领域中实现复用;因此,设计大粒度复用的应用框架对于提高软件的生产率和软件质量具有重要的意义;文中以软件复用为出发点,基于构件化软件的开发思路,对软件的构件技术、领域工程、面向领域的应用框架技术进行了深入的研究,提出了基于需求驱动的面向领域应用框架的开发方法,并详细说明了该方法在项目评审领域的应用.     

基于OSGi的面向服务软件体系结构设计

为了实现企业级应用的基础架构、开发方式和部署方式的统一,文中研究了O SGi服务组件模型。O SGi提供了一种面向服务的组件开发框架,具有高度模块化和动态化特点。根据SOA架构思想和OSGi框架特性,设计一种基于OSGi规范的面向服务的软件体系结构,开发了统一服务架构平台,并通过组件化、图形化为设计、开发及调试等过程提供全生命周期的支持,实现了企业应用即插即用的模块化管理,能够有效提高软件模块复用能力和复用程度。     

面向方面的可配置实时系统开发方法

实时系统通常有严格的服务质量约束导致其维护和演化困难,针对该问题,提出一种面向方面的实时系统开发方法。该方法从实时系统的功能需求中分离出非功能需求,建立相应功能模型和非功能模型,生成相应组件和方面。应用结果表明,该方法可根据实际应用环境组成可配置的实时系统,组成的实时系统具有较低的开发复杂性,较高的可重用性和灵活性。     

基于AOP的实时系统关注点分离方法

提出一种基于AOP的实时系统关注点分离方法。该方法分析并识别实时系统中的关注点,将非功能性关注从系统核心功能关注中分离出来,提出基于方面连接件的组装模型,该模型将AOP引入到软件连接件中,从而实现了功能关注与非功能关注绑定或组合过程的透明性,同时使用State模式解决了实时系统软件开发中的状态管理问题。通过一个实时系统实例分析与实现,介绍了该方法在应用中的前景。     

非成熟领域软件复用过程模型

将一个软件企业或开发团队实现有组织的软件复用分为4个阶段,针对可复用资源积累阶段的特点,提出了非成熟领域软件复用过程模型,应用系统分析设计与领域分析适当结合,经数次迭代,逐步积累领域知识,使面向提交的应用系统开发平滑过渡到基于复用地开发,使该领域尽快成熟.该过程模型还考虑了应用系统开发时效和软件开发团队运营成本问题,此阶段软件复用不强调领域工程,应用系统开发是面向提交的,但需要使用基于构件的软件开发.     

CAD应用框架配置技术研究

为满足CAD软件研发中应用框架扩展、复用及调整的需求,论文提出了应用框架基于配置的动态设计方案,并给出了实现的模块划分及流程;同时研究并给出了CAD软件功能配置的层次结构及内容,基于此研究,相同的软件框架在不同的配置下可以开发成为不同的CAD应用或控件,而且不同的CAD软件通过配置合并可以实现框架的集成及功能复用。该技术已在实际的CAD软件开发中得到应用验证。     

基于OSGi面向服务的软件体系架构

为了实现企业应用的基础架构、开发方式、部署方式的统一,文中研究了OSGi服务组件模型. OSGi提供了一种面向服务的组件开发框架,具有高度模块化和动态化特点.根据SOA思想和OSGi技术特性,提出一种基于OSGi的面向服务的软件体系架构,包括基础设施层、服务组件层、服务编排层、应用层,基于J2EE、OSGi等开放技术开发了统一服务架构平台,平台采用SOA架构和标准规范,并通过组件化、图形化为设计、开发、调试、部署、运行、维护提供全生命周期的支持.在实际应用中,文中研究成果实现了企业应用即插即用的模块化管理,能够有效提高软件模块复用能力和复用程度.     

一种面向复用的增量软件开发过程框架

以复用思想指导软件开发是软件产业发展的趋势,而当前主要面向复用的软件开发方法没有考虑到我国软件企业以中小型为主的现状,缺乏针对性,使得复用在我国软件开发中应用不够广泛。在基于构件开发的基础上提出了一种面向复用的增量软件开发过程框架。该过程框架适于我国中小型软件企业,采用了以体系结构为指导的增量开发模式,涵盖了可复用资产的生产过程和利用可复用资产的软件开发过程。     

基于知识的组件化测井软件开发框架

为了提高测井软件的复用能力和智能化程度,文章介绍了ECAP规则系统和组件技术的基本概念,综合应用ECAP规则系统、软件组件和软件复用框架技术,在三层C/S结构的基础上,设计出基于知识的组件化测井软件开发框架。给出了测井储层评价算法逻辑的ECAP规则表示事例和测井储层评价的组件类别划分,以及基于ECAP规则的分层应用程序的运行机制描述。ECAP规则库的建立有利于软件功能的修改和扩充,组件的划分和设计有利于迅速搭建新的测井软件平台。测井软件的整体开发框架是最大粒度的软件复用单元,通过粘合不同的组件和建立不同的规则库可以构造出满足不同需求的测井软件。     

基于知识网最简约生成的面向组件软件开发系统

将基于知识网的最简约生成算法运用到面向组件的软件开发系统上.为了构建面向组件的软件开发系统,分析了知识网在数据库中的存储方式、知识网的最简约生成算法以及改进的知识网最简约生成的步骤;研究了软件模块库到知识网之间的映射关系以及软件模块之间的接口,并在此基础上介绍了软件模块在软件开发系统中的组装流程;通过实例对该系统中软件模块的组装方法进行了说明和验证,表明了该系统的有效性和可行性.     

面向方面体系结构建模研究

面向方面体系结构建模是面向方面软件开发(AOSD)的重要组成部分,也是近些年面向方面领域研究的热点问题。传统的软件体系结构设计方法没有单独地考虑横切关注点。因此,在软件体系结构设计阶段,建模人员需要新的机制来描述这些横切关注点。本文首先提出一个以横切为中心的面向方面体系结构概念框架;然后通过在体系结构设计阶段引入该框架中的核心概念,提出一种在体系结构设计阶段建模横切关注点的方法,从而支持其在早期进行横切关注点的分离。     

Requirement-oriented risk management for incremental software development

In incremental software development (ISD) functionalities are delivered incrementally and requirements keep on evolving across iterations. The requirements evolution involves the addition of new dependencies and conflicts among functional and non-functional requirements along with changes in priorities and dependency weights. This, in turn, demands refactoring the order of development of system components to minimize the impact of these changes. Neglecting the non-functional constraints in the software development process exposes it to risks that may accumulate across several iterations. In this research work, we propose a risk management framework for ISD processes that provides an estimate of risk exposure for the project when functional features are frozen while ignoring the associations with non-functional requirements. Our framework proposes suitable risk reduction strategies that work in tandem with the risk assessment module. We also provide a tool interface for our risk management framework.

     

Engineering Accessible Web Applications. An Aspect-Oriented Approach

The development of accessible Web software is complicated for several reasons. Though some of them are technological, the majority are related with the need to compose different and, many times, unrelated design concerns which may be functional as in the case of most of the specific application’s requirements, or non-functional such as Accessibility itself. In this paper, we present a novel approach to conceive, design and develop Accessible Web applications in an aspect-oriented manner. In order to reach our goal, we provide some modeling techniques that we specifically developed for handling the non-functional, generic and crosscutting characteristics of the Accessibility concerns. Specifically, we have enriched User Interaction Diagrams with integration points, which are used to reason and document Accessibility for activity modeling during user interface design. Then by instantiating a Softgoal Interdependency Graph template with association tables, we work on an abstract interface model (composed by ontology widgets) to obtain a concrete and accessible interface model for the Web application being developed. We use a real application example to illustrate our ideas and point out the advantages of a clear separation of concerns throughout the development life-cycle.     

基于面向方面MDA的实时系统开发方法

实时系统有许多难以处理的横切整个系统的非功能需求。针对以上问题,提出基于面向方面模型驱动架构的实时系统开发方法。该方法在设计阶段将系统的非功能需求从功能需求中分离出,以降低系统开发的复杂性,提高系统的可重用性、可维护性和横切关注点的模块化程度。通过应用实例证明该方法是有效的。     

应用形式化与实时语言的面向方面方法

面向方面的软件开发方法是在面向对象开发方法的基础上,在AOP的支持下将贯穿系统的横切关注点提取出来,通过联结方式织入系统功能代码中的软件开发方法,该方法降低了软件开发的复杂性,提高了系统的灵活性和可维护性。形式化和实时语言为面向方面方法贯穿于实时软件开发提供了必要的支持,以形式化方法AO-RT-Z和实时语言PEARL为基础,给出了一种面向方面的实时软件开发框架,实现了软件生命周期各个阶段对面向方面的无缝支持,降低了实时软件开发的复杂性,提升了系统的可信度。     

Formal specification of non-functional properties of component-based software systems

Component-based software engineering (CBSE) is viewed as an opportunity to deal with the increasing complexity of modern-day software. Along with CBSE comes the notion of component markets, where more or less generic pieces of software are traded, to be combined into applications by third-party application developers. For such a component market to work successfully, all relevant properties of components must be precisely and formally described. This is especially true for non-functional properties, such as performance, memory foot print, or security. While the specification of functional properties is well understood, non-functional properties are only beginning to become a research focus. This paper discusses semantic concepts for the specification of non-functional properties, taking into account the specific needs of a component market. Based on these semantic concepts, we present a new specification language QML/CS that can be used to model non-functional product properties of components and component-based software systems.     

基于面向方面的软件重用模式设计

针对传统的软件重用设计模式，分析了在采用当前流行的面向对象开发方法进行软件重用设计的不足之处，阐述了面向方面的程序设计理论，提出了一种新型的面向方面软件重用模式设计方法，并结合实际应用给出了具体的设计步骤以及面向方面的程序代码架构。     

A model-based aspect-oriented framework for building intrusion-aware software systems

Security is a critical issue for software systems, especially for those systems which are connected to networks and the Internet, since most of them suffer from various malicious attacks. Intrusion detection is an approach to protect software against such attacks. However, security vulnerabilities that are exploited by intruders cut across multiple modules in software systems and are difficult to address and monitor. These kinds of concerns, called cross-cutting concerns, can be handled by aspect-oriented software development (AOSD) for better modularization. A number of works have utilized AOSD to address security issues of software systems, but none of them has employed AOSD for intrusion detection. In this paper, we propose a model-based aspect-oriented framework for building intrusion-aware software systems. We model attack scenarios and intrusion detection aspects using an aspect-oriented Unified Modeling Language (UML) profile. Based on the UML model, the intrusion detection aspects are implemented and woven into the target system. The resulting target system has the ability to detect the intrusions automatically. We present an experimental evaluation by applying this framework for some of the most common attacks included in the Web Application Security Consortium (WASC) web security threat classification. The experimental results demonstrate that the framework is effective in specifying and implementing intrusion detection and can be applied for a wide range of attacks.     

A language for high-level description of adaptive web systems

Adaptive Web systems (AWS) are Web-based systems that can adapt their features such as, presentation, content, and structure, based on users’ behaviour and preferences, device capabilities, and environment attributes. A framework was developed in our research group to provide the necessary components and protocols for the development of adaptive Web systems; however, there were several issues and shortcomings (e.g. low productivity, lack of verification mechanisms, etc.) in using the framework that inspired the development of a domain-specific language for the framework. This paper focuses on the proposal, design, and implementation of AWL, the Adaptive Web Language, which is used to develop adaptive Web systems within our framework. Not only does AWL address the existing issues in the framework, but it also offers mechanisms to increase software quality attributes, especially, reusability. An example application named PENS (a personalized e-News system) is explained and implemented in AWL. AWL has been designed based on the analysis of the adaptive Web domain, having taken into account the principles of reuse-based software engineering (product-lines), domain-specific languages, and aspect-oriented programming. Specially, a novel design decision, inspired by aspect-oriented programming paradigm, allows separate specification of presentation features in an application from its adaptation features. The AWL’s design decisions and their benefits are explained.