B2B Integration : A Practical Guide to Collaborative E-commerce

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Chapter "| 1 Web Services The focus of this chapter Web services based on service-oriented architecture are an evolution in e-business applications that will help companies reach their integration goals and take B2B to the next level. In this chapter, we present the latest technology being developed in the B2B integration domain — Web services. You will learn about SOA, UDDI, WFSL, WSDL and how they fit into the architecture of Web services. 325
326 B2B Integration — A Practical Guide to Collaborative E-commerce 11.1. Service Oriented Architecture (SOA) We have discussed in the previous chapters that B2Bi involves dynamic integration of heterogeneous applications and platforms across multiple organizations. A minor alteration in just one of the applications, at one of the firms, can break the whole integration. For true dynamic integration, software resources such as applications, objects and programs should be loosely coupled. These resources should make their presence known to the world and provide public interfaces, which describe their actions. The communication between these resources and the applications using them should occur, based on open standards. Using these resources, which can be personalized for each user, the future applications would be built dynamically within seconds. This is where SOA comes into the picture. It provides a framework and architecture for interconnecting applications and software components seamlessly. It provides the ability to invoke remote business services and install them as local components in a different application, all without writing a single line of low-level code. 11.1.1. Components and operations of SOA There are three components of service oriented architecture (see Figure 11.1). They are: • Service Provider — This component is responsible for creating and publishing the interfaces of services, providing the actual implementation of these services and responding to any requests for the use thereof. Any company or business can be a service provider. • Service Broker — This component registers and categorizes public services published by various service providers and offers services like search, etc. Service brokers act like a repository or yellow pages for Web services. Companies that want to use Web services can search these yellow pages to find one matching their needs. Currently several companies including Ariba, IBM and Microsoft are acting as service brokers. • Service Requester — This component is the actual user of Web services. Service requesters discover Web services by searching the repository maintained by the service brokers and then invoke these
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Chapter 2 Components, Benefits, Cha
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Chapter 4 Enterprise Application In
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