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In the first article in this series (Vol. 4, issue 9), I described some of the middleware requirements necessary to support a full-function service-oriented architecture (SOA), and introduced the role of the enterprise service bus (ESB) in meeting those requirements. In this article, I will go on to consider some specific situations in which ESB capabilities could be deployed. I will also describe how ESB capabilities relate to other architectural components in an SOA, and briefly discuss suitable technology options for implementing them. The Capabilities of the Enterprise Service Bus Now I'll summarize and categorize some of the ESB capabilities driven by the requirements we discussed. Whilst some of the capabilities are quite basic, some (such as autonomic or intelligent capabilities) represent significant steps towards an on- demand operating environment (see Refer... (more)

SOA and the Art of Riding the Enterprise Service Bus

In this article (part 1 of two), I will discuss the role of the enterprise service bus (ESB) and other technologies in providing an infrastructure for service-oriented architecture (SOA) in the enterprise. This month, I'll discuss some of the middleware requirements necessary to support a full-function SOA. These requirements are driven both by the concepts of SOA, and by the need to apply them in enterprise situations. Some of the important middleware capabilities that fulfil these requirements are now characterized as an "enterprise service bus." By examining the requirements, ... (more)