Message Broker Research Articles

The Application of Load Runner in Message Broker Software of Financial Fusion in a Stated-Owned Bank

LoadRunner is a powerful tool for performance testing, facing the widely use of Financial Fusion's Message Oriented Middleware----Message Broker in a stated-owned bank, with the use the system hardware and software environment of the bank, build the performance testing program to test Message Broker. Using LoadRunner to achieve the Base Testing, Absolute Concurrent Testing and Stability Testing, From these testing, it has been achieved the testing results of performance testing of the messaging middleware software Message Broker, this can provide a theoretical basisfor the application of Message Broker in processing messaging in banks, it also provide theory with the stability of banking systems.

KEMB: A Keyword-Based XML Message Broker

This paper studies the problem of XML message brokering with user subscribed profiles of keyword queries and presents a KEyword-based XML Message Broker (KEMB) to address this problem. In contrast to traditional-path-expressions-based XML message brokers, KEMB stores a large number of user profiles, in the form of keyword queries, which capture the data requirement of users/applications, as opposed to path expressions, such as XPath/XQuery expressions. KEMB brings new challenges: 1) how to effectively identify relevant answers of keyword queries in XML data streams; and 2) how to efficiently answer large numbers of concurrent keyword queries. We adopt compact lowest common ancestors (CLCAs) to effectively identify relevant answers. We devise an automaton-based method to process large numbers of queries and devise an effective optimization strategy to enhance performance and scalability. We have implemented and evaluated KEMB on various data sets. The experimental results show that KEMB achieves high performance and scales very well.

Common Alerting Protocol Message Broker for Last-Mile Hazard Warning System in Sri Lanka: An Essential Component

Meeting: Second International Workshop on Information Systems for Crisis Response and Management (ISCRAM-CHINA 2007), 26-27 August 2007, Harbin, CH

Selectivity-sensitive shared evaluation of multiple continuous XPath queries over XML streams

One of the primary issues confronting XML message brokers is the difficulty associated with processing a large set of continuous XPath queries over incoming XML streams. This paper proposes a novel system designed to present an effective solution to this problem. The proposed system transforms multiple XPath queries before their run-time into a new data structure, called an XP- table, by sharing their common constraints. An XP-table is matched with a stream relation ( SR) transformed from a target XML stream by a SAX parser. This arrangement is intended to minimize the run-time workload of continuous query processing. In addition, an early-query-termination strategy is proposed as an improved alternative to the basic approach. It optimizes query processing by arranging the evaluation sequence of the member-lists (m-lists) of an XP-table adaptively and offers increased efficiency, especially in cases of low selectivity. System performance is estimated and verified through a variety of experiments, including comparisons with previous approaches such as YFilter and LazyDFA. The proposed system is practically linear-scalable and stable for evaluating a set of XPath queries in a continuous and timely fashion.

Airport information system integration by using message broker

Modern airports are being equipped with an ever growing number of modern electronic systems for specific tasks: Baggage Handling Systems (BHS), Flight Information Display Systems (FIDS), Departure Control Systems (DCS), Weight & Balance Systems; Common Used Terminal Equipment (CUTE) Systems; Building Management Systems (BMS), Access Control Systems (ACS), Airport Operation Databases (AODB), Resource Management Systems (RMS) ... there is virtually no end to the list. Nevertheless, many airports are still difficult to navigate for passengers, still have to face departure delays and frequent changes in operations, and still miss substantial revenue opportunities or waste money because of unused resources of every kind. Key to using all those powerful systems to their full capacity and reaping all their benefits is bringing them into tune. A task that is commonly known is the System Integration by using Message Broker solutions. This rather technical term subsumes all activities aimed at establishing the physical connection of disparate systems. The concept of system integration is one step beyond the simple installation of cables and the translation of a few protocols. This paper provides details on the Integration Message Broker solutions in the airport information system industry.

Architecture, performance, and scalability of a real-time global positioning system data grid

We describe the architecture of our real time SensorGrid system, which supports the real-time message routing and processing of Global Positioning System data. The current system processes 1 Hz position data from 85 stations in Southern and Central California. Our system is built on a computer network-enabled, topic-based publish/subscribe system and is extensible to other data sources. In order to determine the performance and the upper limits of scalability, we have conducted and present here a set of systematic test evaluations of our implementation. Through these tests, we are able to show that performance does not degrade over time, that the system will handle up to 1000 simultaneous data providers or data consumers with a single message broker, and that multiple message brokers can be linked to provide scalability beyond 1000 providers or consumers.

Service-Oriented Architecture for Distributed Publish/Subscribe Middleware in Electronics Production

The Computer Aided Manufacturing using XML (CAMX) framework enables integrating electronics production systems using message-oriented middleware, offering standards-based communication among machines and control software applications. CAMX frameworks implement publish/subscribe of XML messages through an entity called the message broker (MSB), which provides the messaging service using a web-based interface. A challenge for MSB-based systems is that they must scale to handle large volumes of messaging traffic, which is a characteristic of modern information-intensive manufacturing systems. This paper first tackles this challenge by presenting an array of architecture patterns for creating distributed MSB frameworks, focusing mainly on globally distributed federations and locally distributed clusters. A unified architecture is subsequently presented that leverages the different patterns by combining federated frameworks with locally distributed clusters into a unified set of architecture elements and interactions. A service-oriented approach is followed to provide a uniform interface for distributed MSB elements, whether federated or locally distributed. The service-oriented approach is also used to dynamically discover resources and automatically invoke the (re)configuration and messaging services. The services are enriched with semantics in order to facilitate automatic discovery and selection of services using the semantic web services formal ontology. Semantic service advertisements are propagated using a peer-to-peer discovery protocol. The approach presented in this paper is not limited to the CAMX case and is generally applicable to distributed event-based manufacturing systems

Management of real‐time streaming data Grid services

AbstractWe discuss our message‐based approach to managing real‐time data streams and building higher level services to produce and consume them. Our messaging system acts as a substrate that can be used to provide qualities of service to various streaming applications ranging from audio–video collaboration systems to sensor Grids. The messaging substrates are composed of distributed, hierarchically arranged message broker networks. Services such as filters are deployed along the edges of the network. We discuss the role of management systems for both broker networks and filter services: broker network topologies must be created and maintained, and distributed filters must be arranged in appropriate sequences. These managed broker networks may be applied to a wide range of problems. We discuss applications to audio–video collaboration in some detail and also describe applications to streaming Global Positioning System data streams. These provide specific application filters that can transform and republish message streams to the broker system. Copyright © 2006 John Wiley & Sons, Ltd.

High-Volume Continuous XPath Querying in XML Message Brokers

The core technical issue in XML message brokers, which play a key role in exchanging information in ubiquitous environments, is processing a large set of continuous XPath queries over incoming XML streams. In this paper, a new system as an epochal solution for this issue is proposed. The system is designed to minimize the runtime workload of continuous query processing by transforming XPath expressions and XML streams into newly proposed data structures and matching them efficiently. Also, system performances are estimated both in terms of space and time, and verified through a variety of experimental studies, showing that the proposed system is practically linear-scalable and stable in terms of processing a set of XPath queries in a continuous and timely fashion.

Evolutionary multi-objective optimization of QoS-Aware Publish/Subscribe Middleware in electronics production

Computer-Aided Manufacturing using XML (CAMX) production systems are built on Message-Oriented Middleware Frameworks, offering standards-based communication among machines and control software applications. CAMX Frameworks implement Publish/Subscribe of XML messages through an entity called the Message Broker (MSB), which provides the messaging service using a Simple Object Access Protocol (SOAP) interface. In order to create scalable frameworks, distributed MSB systems are deployed. However, the topology optimization problem arises, as clients need to be assigned to one of many MSB nodes. The problem is strictly NP-hard, and multiple optimization criteria are conflicting. A solution considering real-time systems was developed based on Evolutionary Multi-Objective Optimization techniques. The Framework Optimization Algorithm (FOA) is designed to work with various topologies, including federated frameworks, locally distributed clusters, and mixed environments including embedded middleware nodes. The developed FOA was tested for a case scenario based on a flexible manufacturing system running on a distributed CAMX framework, and proved to robustly converge to the optimal topology. Convergence was achieved within few seconds, demonstrating the suitability of FOA for rapid topology reconfiguration in response to changes in the system.

Optimized QoS priority routing for service tunability and overhead reduction using swarm based active network scheme

As technology is moving towards the pervasive computing environments with billions of users, devices, and services, the Quality of Service (QoS) becomes a necessity and an essential element for end-to-end real time applications. The concept of active network has been recently adopted in order to provide a framework in which executable code within data packets executes upon intermediate network nodes and to facilitate delay services in the network. This paper describes the combination of the active network concept with swarm based control method called Swarm-based Active Network scheme for optimized QoS priority routing. This hybrid scenario is using the bandwidth clustering approach in which packets are following the predetermined path allocated by swarm based packets (embedded swarms). This mechanism enables the adaptation of the system to new conditions, as well as additional information to be passed to neighboring nodes for which information is embodied in transmitted packets. The proposed swarm based scheme does not require message brokers to fulfill QoS demands issued by applications. Additionally, it computes efficiently the available resources that satisfy the QoS requirements of requests. Thorough examination is made for the performance and reliability of the Swarm based Active Network scheme for different traffic measures and for the corresponding QoS offered in terms of the end-to-end delay, available bandwidth and packet loss. This scheme offers a decentralized way to efficiently increase the overall network utilization, allowing scalability and efficient usage of network bandwidth.

Evaluating the integration of supply chain information systems: A case study

Supply chain management (SCM) is the integrated management of business links, information flows and people. It is with this frame of reference that information systems integration from both intra- and inter-organisational levels becomes significant. Enterprise application integration (EAI) has emerged as software technologies to address the issue of integrating the portfolio of SCM components both within organisations and through cross-enterprises. EAI is based on a diversity of integration technologies (e.g. message brokers, ebXML) that differ in the type and level of integration they offer. However, none of these technologies claim to be a panacea to overcoming all integration problems but rather, need to be pieced together to support the linking of diverse applications that often exist within supply chains. In exploring the evaluation of supply chain integration, the authors propose a framework for evaluating the portfolio of integration technologies that are used to unify inter-organisational and intra-organisational information systems. The authors define and classify the permutations of information systems available according to their characteristics and integration requirements. These, classifications of system types are then adopted as part of the evaluation framework and empirically tested within a case study.

Evaluating the sustained performance of COTS‐based messaging systems

AbstractMessaging systems, which include message brokers built on top of message‐oriented middleware, have been used as middleware components in many enterprise application integration projects. There are many COTS‐based messaging systems on the market, but there is little concrete understanding in the software industry on the performance of these different technologies. The authors have carried out a scenario‐based evaluation of three leading messaging systems to provide insight into performance issues. The evaluation process includes a study of the sustained performance of the system under load. The result of this study is used to derive a generic metric for quantifying a messaging system's performance. The paper describes a synthetic transactional scenario, which is used for load tests and performance measurement. The results from executing this test scenario with three messaging systems are then presented and explained. Copyright © 2003 John Wiley & Sons, Ltd.

INTELLIGENT MANUFACTURING SYSTEMS PROJECT IRMA — LINKING VIRTUAL REALITY TO SIMULATION

An international group of industrial companies and research institutions is actually creating an integrated platform for industrial process control, process design, staff training and product design. By linking simulation and virtual reality, project IRMA (A Configurable Virtual Reality system for multi-purpose industrial manufacturing applications) is to improve manufacturing performance. The core integration module is the Delfoi INTEGRATOR™, a PC based message broker used to link a virtual environment and a production/failure database scenario, to different simulations (QUEST and ARENA material flow simulation, IGRIP robot kinematics simulation) or to programmable logic controls using their OPC interface.

5.4.1 ProACT™: Process‐aware Zero Latency System for Distributed, Collaborative Enterprises

AbstractEnterprise integration technologies such as XML, publish‐subscribe, and message brokers have made it possible for distributed enterprises to exchange information in a consistent, standardized way. However, these technologies do not address how to effectively integrate humans within distributed, collaborative enterprises nor do they specifically address how to minimize latencies in collaborative enterprises.This paper presents ProACT™, a process‐aware collaborative system for integrating distributed collaborative enterprises at the functional/task level. ProACT exploits knowledge and awareness of planning/process execution status to eliminate/reduce information latencies in the distributed enterprise. ProACT employs a variety of process‐enabled, zero latency strategies such as optimal information caching, information prefetching, message prioritization in a bandwidth‐limited network, optimum database partitioning, and information replication to achieve the near‐instantaneous awareness goals of the enterprise.

Aspect-oriented programming

Computer science has experienced an evolution in programming languages and systems from the crude assembly and machine codes of the earliest computers through concepts such as formula translation, procedural programming, structured programming, functional programming, logic programming, and programming with abstract data types. Each of these steps in programming technology has advanced our ability to achieve clear separation of concerns at the source code level. Currently, the dominant programming paradigm is object-oriented programming - the idea that one builds a software system by decomposing a problem into objects and then writing the code of those objects. Such objects abstract together behavior and data into a single conceptual and physical entity. Object-orientation is reflected in the entire spectrum of current software development methodologies and tools - we have OO methodologies, analysis and design tools, and OO programming languages. Writing complex applications such as graphical user interfaces, operating systems, and distributed applications while maintaining comprehensible source code has been made possible with OOP. Success at developing simpler systems leads to aspirations for greater complexity. Object orientation is a clever idea, but has certain limitations. We are now seeing that many requirements do not decompose neatly into behavior centered on a single locus. Object technology has difficulty localizing concerns invoking global constraints and pandemic behaviors, appropriately segregating concerns, and applying domain-specific knowledge. Post-object programming (POP) mechanisms that look to increase the expressiveness of the OO paradigm are a fertile arena for current research. Examples of POP technologies include domain-specific languages, generative programming, generic programming, constraint languages, reflection and metaprogramming, feature-oriented development, views/viewpoints, and asynchronous message brokering. (Czarneclu and Eisenecker s book includes a good survey of many of these technologies).

Enterprise application integration

Organizations that are able to integrate their applications and data sources have a distinct competitive advantage: strategic utilization of company data and technology for greater efficiency and profit. But IT managers attempting integration face daunting challenges--disparate legacy systems; a hodgepodge of hardware, operating systems, and networking technology; proprietary packaged applications; and more.Enterprise Application Integration (EAI) offers a solution to this increasingly urgent business need. It encompasses technologies that enable business processes and data to speak to one another across applications, integrating many individual systems into a seamless whole.Enterprise Application Integrationprovides a comprehensive examination of EAI. You will find an overview of EAI goals and approaches, a review of the technologies that support it, and a roadmap to implementing an EAI solution. You will also find an in-depth explanation of the four major types of EAI: data-level, application interface-level, method-level, and user interface-level. The book describes in detail the middleware models and technologies that support these different approaches, including: Application servers, including the use of Enterprise JavaBeans (EJB) and ActiveX Message-oriented middleware (MOM) and remote procedure calls (RPCs) Distributed objects, looking at CORBA and COM Database-oriented middleware and standards, including ODBC, JDBC, and OLE DB Java middleware standards Message brokers New process automation and workflow technologyThis practical guide to implementing an EAI solution leads you through all the major steps, including identifying sources of data, building the enterprise metadata model, process integration, identifying application interfaces, mapping information movement, selecting and applying the technologies, testing, and maintenance. Other key topics include integrating packaged applications such as SAP R/3 and PeopleSoft, integrating the supply chain using EAI, the role of XML, and process automation. Comprehensive, practical, and clearly written, this essential resource will help anyone involved in this important business area understand the nature of EAI, its tools and techniques, and how to apply it for a significant business advantage. 0201615835B04062001