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Open Source SOA by Jeff Davis

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Chapter 9. Enterprise integration and ESBs

An enterprise service bus (ESB) is a strange bird. The term first burst upon the scene in 2002, followed by a flurry of products that proclaimed themselves as ESBs. However, what constitutes an ESB has always been a matter of debate. At a minimum, most would agree that an ESB is an enterprise messaging system that primarily relies on the exchange of XML messages. These messages, in turn, can be intelligently routed and transformed through a decentralized architecture.

The emergence of ESBs has roughly coincided with the increasing standardization of web service and messaging protocols such as Java Messaging System (JMS) and SOAP. Indeed, the initial group of vendors who released ESBs tended to be those ...

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