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J2EE™ Tutorial, The by Beth Stearns, Monica Pawlan, Eric Jendrock, Kim Haase, Dale Green, Stephanie Bodoff

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About Resource Adapters

A resource adapter is a J2EE component that implements the J2EE Connector architecture for a specific EIS. It is through the resource adapter that a J2EE application communicates with an EIS (see Figure 17-1).

Figure 17-1. Accessing an EIS Through a Resource Adapter

Stored in a Resource Adapter Archive (RAR) file, a resource adapter may be deployed on any J2EE server, much like the EAR file of a J2EE application. A RAR file may be contained in an EAR file or it may exist as a separate file.

A resource adapter is analogous to a JDBC driver. Both provide a standard API through which an application can access a resource ...

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