Java Business Integration

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Java Business Integration (JBI) is a specification developed under the Java Community Process (JCP) for an approach to implementing a service-oriented architecture (SOA). The JCP reference is JSR 208.

JBI is built on a Web Services model, and provides a pluggable architecture for a container that hosts service producer and consumer components. Services connect to the container via binding components (BC) or can be hosted inside the container as part of a service engine (SE). The services model used is Web Services Description Language 2.0. The central message delivery mechanism, the normalized message router (NMR), delivers normalized messages via one of four message exchange patterns (MEPs), taken from WSDL 2.0:

In-Only: A standard one-way messaging exchange where the consumer sends a message to the provider that provides only a status response.
Robust In-Only: This pattern is for reliable one-way message exchanges. The consumer initiates with a message to which the provider responds with status. If the response is a status, the exchange is complete, but if the response is a fault, the consumer must respond with a status.
In-Out: A standard two-way message exchange where the consumer initiates with a message, the provider responds with a message or fault and the consumer responds with a status.
In Optional-Out: A standard two-way message exchange where the providers response is optional.

To handle functionality that deals with installation, deployment, monitoring and lifecycle concerns amongst BCs and SEs, Java Management Extensions (JMX) is used. JBI defines standardized packaging for BCs and SEs, allowing components to be portable to any JBI implementation without modification.

JBI defines standard packaging for composite applications: applications that are composed of service consumers and providers. Individual service units are deployable to components; groups of components are gathered together into a service assembly. The service assembly includes metadata for "wiring" the service units together (associating service providers and consumers), as well as wiring service units to external services. This provides a simple mechanism for performing composite application assembly using services.

[edit] JBI implementations

The following are open-source software JBI based ESB implementations available:

Open-ESB home page
ObjectWeb Petals
Apache ServiceMix home page
Bostech ChainBuilder ESB home page
Mule home page. Though not a JBI compliant container by itself, Mule provides interoperability with JBI containers. There is a separate Mule-JBI project that is to address this JBI compliant issue JBI-Mule-Confluence.