共查询到19条相似文献,搜索用时 115 毫秒
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针对当前分布式网络应用支撑系统的平台限制、防火墙约束和难于掌握等局限,提出了一种跨平台的基于SOAP协议的分布式计算支撑平台XSOAP系统。介绍了系统的实现原理、组成部件和功能结构,描述了采用XML消息结构基于HTTP传输的实现,分析了系统的实现框架和数据流程,并对利用JAVA语言解决XML消息数据和实际数据编码之间的转换以及RPC调用实现做了详细的阐述,实现了对分布式计算的强大支持。 相似文献
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基于CORBA消息中间件的设计与实现 总被引:1,自引:0,他引:1
在日益复杂的分布式计算环境中,中间件减少了复杂应用系统的开发和集成的难度,成为分布式计算应用的关键性部件。该文设计并实现了一个基于CORBA的消息中间件系统,提供了在异构平台中分布对象之问进行消息驱动的、透明的、异步的、基于消息内容的消息传输方法。 相似文献
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针对高校的数字化校园建设,在对JMS和XML进行简要分析的基础上,设计出了基于JMS和XML的异构数据集成技术的方案模型,对异构数据集成的原理以及主要技术进行了研究。JMS(Java Message Service)是SUN公司提出的Java消息服务规范,适用于面向消息的分布式计算系统。XML是具有自描述性等特点的数据表示和交换的标准。最后对数据集成过程中所采用的数据传输方式和数据传输格式进行了详细描述。 相似文献
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基于JMS和XML的异构数据集成技术的设计与实现 总被引:3,自引:0,他引:3
针对高校的数字化校园建设.在对JMS和XML进行简要分析的基础上,设计出了基于JMS和XML的异构数据集成技术的方案模型.对异构数据集成的原理以及主要技术进行了研究。JMS(Java Message Service)是SUN公司提出的Java消息服务规范,适用于面向消息的分布式计算系统。XML是具有自描述性等特点的数据表示和交换的标准。最后对数据集成过程中所采用的数据传输方式和数据传输格式进行了详细描述。 相似文献
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中间件是一种独立的系统软件或服务程序,分布式应用系统借助这种软件在不同的技术之间共享资源,管理计算资源和网络通讯。在应用系统中采用合适的中间件能够降低应用系统的复杂度,缩短开发周期。本文针对营收业务和银行联网收费的需求特点,分析中间件技术的应用,研究DataSnap应用服务器中间件和WebSphereMQ消息队列中间件... 相似文献
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不同的应用中间件产品有着差异性很大的编程接口,在大型分布式企业计算中带来很大的移植工作量。本文从千万用户级大型分布式应用建设的实践出发,提出的VMD是屏蔽多种应用中间件产品的可移植性中间件框架设计,同时兼顾了执行和开发效率、安全、灵活等特性。本文阐述了VMD的实现原理、框架结构、关键技术和实现意义,并对基于VMD的开发给出了测试和评估。 相似文献
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Apolinar Gonz��lez W. Mata L. Villase?or R. Aquino Jose Simo M. Ch��vez A. Crespo 《Journal of Intelligent and Robotic Systems》2011,64(3-4):489-503
A Real-Time Wireless Distributed Embedded System (RTWDES) is formed by a large quantity of small devices with certain computing power, wireless communication and sensing/actuators capabilities. These types of networks have become popular as they have been developed for applications which can carry out a vast quantity of tasks, including home and building monitoring, object tracking, precision agriculture, military applications, disaster recovery, industry applications, among others. For this type of applications a middleware is used in software systems to bridge the gap between the application and the underlying operating system and networks. As a result, a middleware system can facilitate the development of applications and is designed to provide common services to the applications. The development of a middleware for sensor networks presents several challenges due to the limited computational resources and energy of the different nodes. This work is related with the design, implementation and test of a micro middleware for RTWDES; the proposal incorporates characteristics of a message oriented middleware thus allowing the applications to communicate by employing the publish/subscribe model. Experimental evaluation shows that the proposed middleware provides a stable and timely service to support different Quality of Service (QoS) levels. 相似文献
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通用网络编程接口包的设计和实现 总被引:3,自引:0,他引:3
网络计算环境中,网络编程接口的多样性给开发网络应用程序带来了很大的不便.本文给出了一个通用的、可扩充的网络编程接口包UniChannels的设计与实现.UniChannels提供了通用的网络编程接口,并且通过使用一种新的设计模式即“地址绑定“模式,将协议相关操作和一般性的通信过程分离,从而使UniChannels具有良好的协议透明性.目前,UniChannels已应用到包括消息队列中间件在内的多个网络应用程序中. 相似文献
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Chan A.T.S. Siu-Nam Chuang 《IEEE transactions on pattern analysis and machine intelligence》2003,29(12):1072-1085
Traditionally, middleware technologies, such as CORBA, Java RMI, and Microsoft's DCOM, have provided a set of distributed computing services that essentially abstract the underlying network services to a monolithic "black box." In a mobile operating environment, the fundamental assumption of middleware abstracting a unified distributed service for all types of applications operating over a static network infrastructure is no longer valid. In particular, mobile applications are not able to leverage the benefits of adaptive computing to optimize its computation based on current contextual situations. In this paper, we introduce the Mobile Platform for Actively Deployable Service (MobiPADS) system. MobiPADS is designed to support context-aware processing by providing an executing platform to enable active service deployment and reconfiguration of the service composition in response to environments of varying contexts. Unlike most mobile middleware, MobiPADS supports dynamic adaptation at both the middleware and application layers to provide flexible configuration of resources to optimize the operations of mobile applications. Within the MobiPADS system, services (known as mobilets) are configured as chained service objects to provide augmented services to the underlying mobile applications so as to alleviate the adverse conditions of a wireless environment. 相似文献
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Lizhe WangAuthor Vitae Dan ChenAuthor Vitae Fang HuangAuthor Vitae 《Computers & Electrical Engineering》2011,37(3):300-310
Grid computing has become an effective computing technique in recent years. This paper develops a virtual workflow system to construct distributed collaborative applications for Grid users. The virtual workflow system consists three levels: abstract workflow system, translator and concrete workflow system. The research highlight of the implementation is that this workflow system is developed based on CORBA and Unicore Grid middleware. Furthermore, this implementation can support legacy application developed with Parco and C++ codes. This virtual workflow system can provide efficient GUI for users to organize distributed scientific collaborative applications and execute them on Grid resources. We present the design, implementation, and evaluation of this virtual workflow system in the paper. 相似文献
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为了满足移动计算的要求,提高移动应用系统的扩展性和自适应性,移动中间件被引入到移动系统的开发中.分析了移动中间件必须满足的要求,提出了面向服务的移动中间件模型,该模型将分布在移动计算系统中的若干个中间件组织成中间件服务器来提高系统的扩展能力,介绍了该模型的体系结构及其设计,并对其性能进行了深入讨论. 相似文献
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The WS-Mediator framework employs an off-the-shelf mediator architecture and resilience-explicit computing in pursuit of dependable, dynamic Web services integration. Web services and service-oriented architectures (SOAs) represent a new paradigm for building distributed computing applications. Web services offer advantages over conventional distributed computing middleware platforms. Web services' loosely coupled architecture, combined with their standardized interoperability, lead to a new computing paradigm that supports the construction of more flexible and dynamic distributed applications 相似文献