A software architecture centric self-adaptation approach for Internetware

Being one of the basic features of Internetware, self-adaptation means that the software system can monitor its runtime state and behavior and adjust them when necessary according to pre-defined policies. Focusing on the three fundamental issues of self-adaptation, including the scope, operability and trustworthiness, a software architecture （SA） centric approach for Internetware＇s self-adaptation is presented in this paper. All of the self-adaptive actions, i.e. monitoring, analyzing, planning and executing, are performed based on SA. In detail, runtime state and behavior of Internetware are represented and changed in the form of runtime soft- ware architecture. The knowledge for self-adaptation is captured, organized and reasoned in the form of SA so that automatic analysis and decision-making are achieved.     

Internetware Computing: Issues and Perspective

The Internetware addresses the unique challenges of software development and maintenance in the open and dynamic Internet environment. The project identifies the four major features as the vision of future Internetware including autonomous services, dynamic collaboration, environment-aware evolution and adaptation, and verifiable and justifiable trustworthiness. The paper discusses four key enabling techniques to achieve the above Internetware capabilities. 1) The lifecycle model: it proposes the model-driven and reuse- centric adaptive lifecycle of service software and the mashup approach for composition-based application development. 2) The ontology system: it discusses a wide range of software development ontology systems that can be used at various abstraction levels throughout all the stages of software lifecycle, and the issues with ontology systems such as consistency and completeness, dependency analysis, merging and change management. 3) Modeling and simulation: it identiˉes the necessary characteristics of the modeling language in the new paradigm such as the modeling of environment , system and environment interactions,the environment-system co-engineering process, and the ontology support for modeling and simulation. 4) Social ranking: it points out that social network will play an important role in Internetware development framework. Traditional software activities such as requirements solicitation and testing can be improved following this social approach. From these above four perspectives, the paper gives an outlook to the emerging techniques and their potential power in Internetware software engineering.     

基于非确定性推理的网构软件服务质量动态评估方法

提出了网构软件环境下一种基于非确定性推理的构件服务质量动态评估方法.该方法基于贝叶斯网络,其主要特点在于考虑了用户对构件的QoS需求,可以预测在用户多种QoS需求下采用分级策略的构件服务能力,支持评估模型的动态更新,提高了评估结果的准确性.在自主开发的服务协同总线(Once-SCB)平台上进行了应用与验证,结果表明,该评估模型准确、有效,可以在用户多种QoS需求下为其选择最为合适的构件.     

特征模型驱动的网构软件构件组装与优化方法

面向特征的领域分析方法可为网构软件中资源的有序化提供有效支持.从领域工程的角度出发,提出一种特征模型驱动的网构软件组装与优化方法,该方法以iJackson图描述网构软件的特征模型,结合软件体系结构特点,分析了将特征模型转换为面向业务构件、基于工作流图技术的组合模型的机制,通过应用图论方法,将组合模型建模为以领域特征簇为中心的构件组装结构图,围绕面向多目标需求的QoS模型,建立了Internet环境下网构软件构件组装问题的数学模型,提出了一种基于蚁群优化算法的全局优化方法.最后,以网上书店系统为倒,介绍了仿真实验过程,并说明了方法的有效性和可行性.     

Requirements model driven adaption and evolution of Internetware

Today’s software systems need to support complex business operations and processes.The development of the web-based software systems has been pushing up the limits of traditional software engineering methodologies and technologies as they are required to be used and updated almost real-time,so that users can interact and share the same applications over the internet as needed.These applications have to adapt quickly to the diversified and dynamic changing requirements in the physical,technological,economical and social environments.As a consequence,we are expecting a major paradigm shift in software engineering to reflect such changes in computing environment in order to better address the fundamental needs of organisations in this new era.Existing software technologies,such as model driven development,business process engineering,online(re-)configuration,composition and adaptation of managerial functionalities are being repurposed to reduce the time taken for software development by reusing software codes.The ability to dynamically combine contents from numerous web sites and local resources,and the ability to instantly publish services worldwide have opened up entirely new possibilities for software development.In retrospect to the ten years applied research on Internetware,we have witnessed such a paradigm shift,which brings about many changes to the developmental experience of conventional web applications.Several related technologies,such as cloud computing,service computing,cyber-physical systems and social computing,have converged to address this emerging issue with emphasis on different aspects.In this paper,we first outline the requirements that the Internetware software paradigm should meet to excel at web application adaptation;we then propose a requirement model driven method for adaptive and evolutionary applications;and we report our experiences and case studies of applying it to an enterprise information system.Our goal is to provide high-level guidelines to researchers and practitioners to meet the challenges of building adaptive industrial-strength applications with the spectrum of processes,techniques and facilities provided within the Internetware paradigm.     

结合可信度模糊评价与动态聚类的构件选择

开放、动态的Internet环境下,网构软件面临可信性的重大挑战。运用模糊理论,提出了一种满足最贴近用户可信度期望的构件选择方法。该方法中,定义了网构软件环境下构件的6种可信属性,介绍了一种多因素的构件可信度模糊综合评价方法,以此为基础,建立了一种满足用户可信度期望的网构软件模型,为实现候选构件与抽象构件的映射,应用基于模糊等价关系的动态聚类实现可信构件的选择。结合案例说明了方法的有效性。     

支持Internetware的中间件技术演化模型(英文)

随着网络的发展,中间件在应用的开发、部署和管理中扮演着越来越重要的角色。因为中间件的类型复杂,关于中间件的认知众说纷纭,而新一代计算环境和技术又对中间件提出了新的要求。针对中间件技术的演化提出了一种观点,并阐述了支持Internetware的下一代中间件系统的演化模型。     

SelfTrust: leveraging self-assessment for trust inference in Internetware

Internetware is envisioned as a new software paradigm for software development in platforms such as the Internet.The reliability of the developed software becomes a key challenge due to the open,dynamic and uncertain nature of such environment.To make the development more reliable,it is necessary to evaluate the trustworthiness of the resource providers or potential working partners.To this end,we propose a novel trust inference approach to evaluating the trustworthiness of potential partners to guide the software development in Internetware.The main insight of our approach is to employ the self-assessment information in order to improve the trust inference accuracy.Especially,we frst extend the balance theory and the status theory from social science to incorporate self-assessment,and then propose a machine learning framework to extract several features from the extended theories and infer trustworthiness scores based on these features.Experimental results on a real software developer network show that the self-assessment information truly helps to improve the accuracy of trust inference,and the proposed SelfTrust model is more accurate than other state-of-the-art methods.