By Alex Nghiem
ISBN-10: 0130097195
ISBN-13: 9780130097194
In IT internet prone, best net prone integrator Alex Nghiem bargains a accomplished, up to the moment roadmap for each CIO, CTO, strategist, architect, and IT decision-maker. This book's precise 360 measure view of may help you objectively verify architectures, systems, and enterprise types alike - and its vast early-adopter interviews supply unparalleled perception into the realities of deployment. The integrated CD-ROM features a 1-year developer license to Iona's XMLBus net prone platform.
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Extra resources for IT Web Services: A Roadmap for the Enterprise
Example text
We'll talk more about Web Services networks in Chapter 6. • ERP, CRM, and EAI systems. ERP and CRM systems provide the core functionality for many firms and will continue to do so even with the emergence of Web Services. In some cases, Web Services may replace the simpler integration scenarios between CRM and ERP currently addressed by the lower-end EAI solutions. However, as of now, the base Web Services do not address many of the advanced features found in the higher-end EAI solutions transaction control, message integrity, queuing, to name a few.
Without a central repository, these services are often duplicated. An example would be a service for accessing the human resource legacy system. - Portal UDDI. The registry is located behind a firewall. Therefore, the external users can search for entries, but only the operators of the portal can publish or update the entries in the portal. In a sense, this is the model of the portals today. Users can browse and invoke services (such as stock quotes), but they cannot add new services (although they can personalize the views).
The member firm the one that is providing the actual valuation service is the provider. • The holding company is the client. Figure 2-8 illustrates the requester locating the valuation service and invoking it. Figure 2-8. Locating and invoking a Web Service. 39 40 Types of UDDI Registries UDDI registries can be categorized into two major groups: • Public. Anyone can publish an entry in a public registry, which has no process to ensure the validity of its entries. ) Because an entry is not validated, there may be questions as to whether the business actually exists, whether the services are even provided, and whether the services are delivered at an acceptable level.