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The mediated message exchange between components is provided by the Normalized Message Router (NMR). The NMR routes normalized messages between service providers and consumers. A normalized message consists of two parts: the message content (payload) and the message metadata. The message metadata contains information such as security information, that can affect the processing of the message as it routes through the JBI. Messages flowing into the JBI via the binding components are translated into a normalized (neutral) format, then routed to their destination. Prior to final delivery the normalized message is translated into the appropriate format for the recepient. A message can be routed through several JBI components depending on what processing is needed.

The JBI provides a container that services/provides the NMR, provides management services...
JBI components plug into the JBI frameworkan environment for plug-in components and provides a message based service to allow the plug-in components to interact. The JBI environment also supplies a set of services for management of the JBI environment, including services for component installation and life cycle management of components.

A simple scenario shows the flow of messages through the JBI's components.

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