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From the Author of SOA Design Patterns

Thomas Rischbeck

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ESB products emerged around 2002 from message-oriented middleware (MOM). Faced with market domination by IBM, MOM vendors were the first to jumpstart the ESB concept with the aim of developing a unique selling proposition. They added Web service and EAI capabilities on top of existing message broker capabilities, and with analyst support coined the term ESB. ESB was positioned as a low-cost alternative to EAI and panacea for all integration needs - tell-tale signs of hype. Unfortunately, the standards community was too late to get on the bandwagon. In the absence of standards guidance and the lack of a clear definition, each vendor interpreted ESB to its advantage. As a result, comparing ESBs is like comparing apples and oranges. No two products are compatible today with severe consequences (in terms of vendor lock-in) for end users. SCA promises alleviation here, a... (more)