A Resource Adapter is an archive file format defined in the J2EE Connector Architecture (JCA) specification.
A Resource Adapter aRchive (RAR) file is the valid format for deployment of resource adapters on application servers.
Note that although the file extension of RAR is used (to signify Resource Adapter aRchive), this use of the file extension RAR should not be confused with the RAR file extension that indicates use of RAR compression.
J2EE RAR files may also be called connectors.
See also
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