B2B Integration : A Practical Guide to Collaborative E-commerce

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Web Services 339 the B2Bi domain, as otherwise a malicious sender can later disavow having created and sent a specific message. The importance of each one of these requirements is determined on an application-to-application basis and factors such as whether the Web Service is being used for EAI or B2Bi, what's the level of access that the Web service provides to the underlying and should the access be based authorization and entitlements. But, one thing is for sure — security is one of the primary factors that would determine the adoption of Web Services by companies of all sizes and in all sectors. 11.10. Where to Start? Companies should start using Web services in internal application integration projects on a function, application programming interface (API) or remote procedure call (RPC) level. This will orient the IT staff with the technology issues involved in using Web services, which would be very helpful in overcoming the challenges later posed when the company uses Web services for external application integration (B2B integration) projects. It is much easier to control, manage, find, execute and maintain Web services within an intranet, as compared to using them over the Internet across the corporate firewall. Furthermore, it would help companies in identifying business opportunities using standardized and relatively cheap Web services solutions as opposed to expensive EAI broker solutions. Web services will gradually evolve from an EAI solution to a B2Bi solution over a period of time. 11.10.1. Leverage existing assets It would be utterly naive of companies to scrap the existing EAI infrastructure and blindly march towards deploying Web Services to replace it. Companies cannot stop using the EAI middleware frameworks, which provide full transactional services, in lieu of Web Services, which don't (as yet). Instead, they should use Web Services to leverage existing infrastructure. Using Web Services, companies will also be able to leverage the resources they have invested in implementing any .NET and/or J2EE
340 B2B Integration — A Practical Guide to Collaborative E-commerce projects. Web Services technology works hand-in-hand in .NET and J2EE technologies, rather than as a competing technology. For instance, J2EE connectors give developers an interface for accessing legacy transactions and data, whereas Web services provide a uniform, standardsbased technique for exposing application functionality over the Internet or the corporate intranet. 11.10.2. Build an internal repository for Web Services Early on in their adoption of Web Services, companies should make an effort to develop an internal centralized service repository for publishing information that internal applications can use to find information about published Web Services. If each group and department starts maintaining their own repository, over time there will be several repositories within the company, making the publishing, discovery and use of Web Services a painful and time consuming process. 11.10.3. Bottom line Web Services, by themselves, are not the nirvana for EAI or B2Bi. An EAI and/or B2Bi platform within a Fortune 500 company would still comprise multiple solutions which together would offer both non-real time and real-time integration, support for managing semantic transformations, business process integration and application integration, based on open standards and proprietary formats. 11.11. Web Services Networks The use of Web services for B2Bi will be enabled through the emergence of trusted managers, known as Web services networks. Web services networks will be built on open Internet standards, including Web services. They will take on the responsibility for managing the security, transaction management, versioning, publishing, finding and deploying Web services. They will help in overcoming the biggest hurdle of using third party Web services for B2Bi — the inherent unreliability of unqualified sources. Grand Central Network is an example of such a Web services oriented network.
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Chapter 2 Components, Benefits, Cha
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Chapter 4 Enterprise Application In
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