The book first discusses the various integration approaches available and introduces Enterprise Service Bus (ESB), which is a new Architectural pattern which can facilitate integrating services. ESB provides different forms of mediation services including routing and transformation. Java Business Integration (JBI) provides a collaboration framework which provides standard interfaces for integration components and protocols to plug into, thus allowing the assembly of Service Oriented Integration (SOI) frameworks following the ESB pattern. JBI is based on JSR 208, which is an extension of Java 2 Enterprise Edition (J2EE). Once JBI and ESB are introduced, we look at how we have been doing service integration without either of the above using traditional J2EE. The book then slowly introduces ESB and showcases with the help of code, how easily things can be done using JBI.

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