Resource Adapter (RA)
The resource adapter (RA) is a system library that provides connectivity to an EIS system. The RA is the heart of the J2EE Connector Architecture and interacts with all the participants, that is, with the application server and the application component, as well as with the EIS system. Given its prime role in the JCA architecture, it is not surprising to note that the RA implements both the system contracts and the application contracts specified in the JCA specification.
EIS vendors must create RAs that comply with the JCA specification to be deemed Java Connector Architecture compliant. The RA implements the CCI. This makes the RA the black box behind the CCI. When a Java program uses an interface in the CCI, it is calling ...
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