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An ESB also supports requirements such as security, orchestration, and transactionality. These exist in "hard-wired" integration methods, but are not available automatically in a service-oriented architecture. One of the key requirements for the ESB is to give loosely coupled, service-based integration methods a level of enterprise-class reliability and security.

A newer requirement for ESBs is the ability to allow not only loosely-coupled requests found in a service oriented architecture, but also to provide the infrastructure for an Event Driven Architecture (EDA). SOA and EDA provide complementary functionality. In EDA an event triggers a message to be sent to other applications that are decoupled from the application that triggered the event.

What is Java Business Integration (JBI)?

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There are many vendors that provide ESB solutions, but there is not universal agreement as to the best design or architecture for an ESB. LogicBlaze has implemented the ServiceMix ESB based on the JBI (JSR 208) specification in order to create a standards based ESB. Equally importantly, and the ServiceMix ESB combines the functionality of both a Service Oriented Architecture (S0A) and Event Driven Architecture (EDA) to achieve an agile, enterprise ESB.

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