Various application domains require the integration of distributed real-time or near-real-time systems with non-real-time *** cities,smart homes,ambient intelligent systems,or network-centric defense systems are among...
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Various application domains require the integration of distributed real-time or near-real-time systems with non-real-time *** cities,smart homes,ambient intelligent systems,or network-centric defense systems are among these application *** Distribution service(DDS)is a communication mechanism based on Data-Centric Publish-Subscribe(DCPS)*** is used for distributed systems with real-time operational *** messageservice(JMS)is a messaging standard for enterprise systems using service Oriented Architecture(SOA)for non-real-time *** allows java programs to exchange messages in a loosely coupled *** also supports sending and receiving messages using a messaging queue and a publish-subscribe *** this article,we propose an architecture enabling the automated integration of distributed real-time and non-real-time *** test our proposed architecture using a distributed Command,Control,Communications,Computers,and Intelligence(C4I)*** system has DDS-based real-time Combat Management System components deployed to naval warships,and SOA-based non-real-time Command and Control components used at *** proposed solution enables the exchange of data between these two systems *** compare the proposed solution with a similar *** solution is superior in terms of automation support,ease of implementation,scalability,and performance.
In view of the characteristics of multi-source data fusion requirements for shipborne information systems, this thesis improves ActiveMQ and builds a shipboard robust communication prototype system. The prototype syst...
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ISBN:
(纸本)9781728140247
In view of the characteristics of multi-source data fusion requirements for shipborne information systems, this thesis improves ActiveMQ and builds a shipboard robust communication prototype system. The prototype system takes advantages of reliable data asynchronous transmission to provide flexible and reliable system communication for functional platforms of shipboard information system (SIS) and overcomes the difficulties of heterogeneous system integration in SIS. This system also improves the traditional message queue model by offering multiple message queues to serve a single data link, making the native java message service (JMS) more reliable. On the other hand, the system provides a scalable clustering solution that utilizes a separate configuration center to implement the expansion, control, and monitoring of message server nodes, and dynamically distribute the load of the message server and message queue. The improved system effectively overcomes difficulties of single line and single point information source failure and becomes more interference and damage resistant.
This paper presents a service Execution Platform (SEP) for Event-Driven service compositions (a.k.a. Mashups), typically used in domains characterised by a working principle based on asynchronous events. The platform ...
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This paper presents a service Execution Platform (SEP) for Event-Driven service compositions (a.k.a. Mashups), typically used in domains characterised by a working principle based on asynchronous events. The platform reference model is based on an orchestration system and on a set of service Proxies (SPs) hosted in the SEP. The orchestration system executes Mashup Sessions by coordinating the actions of the SPs, and takes care of load balancing, security (AAA) and fault tolerance. The paper presents and compares two versions of the SEP based on two different technologies, namely Web services (WSs) and java message service (JMS).
Opportunistic networks constitute an appealing solution to complement fixed network infrastructures - or make up for the lack thereof - in challenged areas. Although many papers published in the last few years address...
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Opportunistic networks constitute an appealing solution to complement fixed network infrastructures - or make up for the lack thereof - in challenged areas. Although many papers published in the last few years address the problem of supporting message dissemination in opportunistic networks, very little of them consider the problem of designing distributed applications capable of running in such networks. This article presents JOMS (java Opportunistic messageservice), a carefully designed message-oriented middleware (MOM) system that is meant to ease the development of opportunistic distributed applications. JOMS fully supports the standard java message service (JMS) specification, but unlike other JMS providers it implements a server-less model: message queues, topics, and a directory service are fully distributed among mobile devices, which collaborate to share information network-wide. JOMS has been evaluated in real conditions using netbooks and Android-based smartphones. The results of this evaluation are also presented in this article. (C) 2014 Elsevier B.V. All rights reserved.
Security of messaging middleware is the key issue to ensure the integrity of news transmission. By analyzing the defects on safety of current JMS-based messaging middleware communication model, elaborating several saf...
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ISBN:
(纸本)9783037853733
Security of messaging middleware is the key issue to ensure the integrity of news transmission. By analyzing the defects on safety of current JMS-based messaging middleware communication model, elaborating several safety problems of messaging middleware from authentication, authorization, encapsulation and audit, this paper proposes a messaging middleware security model based on data encryption and digital signature technology, it encrypt messages with symmetric and asymmetric encryption algorithm and audit some safety-related events, then the security of message transmission has improved.
Well suited to the loosely coupled nature of distributed interaction, message oriented middleware has been applied in many distributed applications. Efficiently transmitting messages with reliability is a key feature ...
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ISBN:
(纸本)9728865430
Well suited to the loosely coupled nature of distributed interaction, message oriented middleware has been applied in many distributed applications. Efficiently transmitting messages with reliability is a key feature of message oriented middleware. Due to the necessary persistence facilities, the performance of transmitting is subject greatly to the persistence action. The Openness of java platform has made the systems conforming to java message service Specification supported widely. In these applications, many consumers get messages periodically. We bring forward a new efficient strategy using different persistence methods with different kinds of messages, which improves system performance greatly. The strategy also utilizes daemon threads to reduce its influence to the system. The strategy has been implemented in our java message service conformed system, ONCEAS MQ.
Starting from 1990s and until now, Grid computing has been mainly used in scientific laboratories. Only in the last few years, it is evolving into a business-innovating technology that is driving commercial adoption. ...
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Starting from 1990s and until now, Grid computing has been mainly used in scientific laboratories. Only in the last few years, it is evolving into a business-innovating technology that is driving commercial adoption. In this paper, we describe GridVideo, a Grid-based multimedia application for the distributed tailoring and streaming of media files. The objective is to show, starting from a real experience, how Grid technologies can be used for the development of nonscientific applications. Relevant performance aspects are analyzed, regarding both user-oriented (in terms of responsiveness) and provider-oriented (in terms of system efficiency) requirements. Different multimedia data dissemination strategies have been analyzed and an innovative technique, based on the Fibonacci series, is proposed. To respond to the stringent quality-of-service (QoS) requirements, typical of soft real-time applications, a reservation-based architecture is presented. Such architecture is able to manage the Grid resource allocation, thus enabling the provisioning of advanced services with different QoS levels. Technical and practical problems encountered during the development are discussed, and a thorough performance evaluation of the developed prototype is presented.
Under the environment of the rapid development of computer network technology, the traditional Enterprise Resource Planning (ERP) has not well adapted to the development of Customer Relationship Management (CRM). In o...
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ISBN:
(纸本)9781424452729
Under the environment of the rapid development of computer network technology, the traditional Enterprise Resource Planning (ERP) has not well adapted to the development of Customer Relationship Management (CRM). In order to cope with such a predicament, the enterprises hope to establish a computer-integrated system for ERP and CRM. However, the integration of the two systems is difficult and complexity. This paper analyzed the integrated problem for ERP and CRM and gave out the solution to the integrated system based on Enterprise java Bean (EJB), java message service (JMS) and Extensible Markup Language (XML). The integration technology was provided in three aspects of functional modules, information integration and system integration. An example from an enterprise is illustrated to explain the feasibility of the integrated system.
With the demand of cooperative work between the various enterprise applications growing, communications between systems becomes the focus of attention. A prerequisite of joining an enterprise system is the ability to ...
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With the demand of cooperative work between the various enterprise applications growing, communications between systems becomes the focus of attention. A prerequisite of joining an enterprise system is the ability to cope with the rigorous demands experienced within such systems. One of the most fundamental of these demands is the requirement for enterprise-level systems to have guaranteed reliable messaging between the participants of the system. The use of java message service (JMS) for enterprise applications communication and integration is increasing very quickly. This paper introduces a new JMS transport protocol, Selector Based Transport Protocol (SBTP) for enterprise applications. The new protocol uses JMS to deliver messages according to the Queue and Publish/Subscribe principle. This paper provides a brief overview of the design of SBTP, evaluates its performance, and examines the benefits of the SBTP in comparison to the other available protocols for JMS;it then concludes and highlights plans for the development of the message transport protocols.
With the growth of internet, the requirement for the communication and message exchanges between programs becomes more and more important. The message-Oriented Middleware (MOM), such as java message service (JMS), cou...
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ISBN:
(纸本)9783540759119
With the growth of internet, the requirement for the communication and message exchanges between programs becomes more and more important. The message-Oriented Middleware (MOM), such as java message service (JMS), could not only greatly reduce the technical learning curve for programmers but also have some amazing characteristics: such as reliable, secured, and event-driven. In the traditional client-server architecture, not only the client side program has to maintain the resource for connections and memory management, but also the server side has to send out several copies of duplicated messages per amount of connected clients. It not only wastes the system resource but also the network bandwidth. A system this paper developed is Fast java Messaging 2 (FJM2), it's a enhancement version from Fast java Messaging (FJM). It creates a whole new JMS provider which is distributed, high performance, reliable, and easy to use and deploy. While compared with FJM, FJM2 adapts a more efficient communication protocol-Negative-acknowledgment (NACK)-Oriented Reliable Multicast (NORM), and does not adapt topic addressing. Moreover, FJM2 has the ability to work across WAN environment to extend the system coverage, and could be adapted for more different application scopes. It would benefit those who want to create a MOM system based on java and multicast protocol.
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