In order to use JCA in a J2EE container, you first MUST have a JCA resource adapter, which resembles a JDBC driver. A JCA adapter is specific to an EIS (for EXAMPLE SAP or PeopleSoft) and is contained in a Resource Adapter Archive (RAR) file composed of the jar files and native libraries necessary to deploy the resource adapter on a J2EE container. A JCA adapter interacts with a J2EE server with system contracts. They enable the J2EE server to propagate the context in which a JCA adapter is being called.

You'll find three types of system contracts:

1. Connection management
2. Transaction management
3. Security

In order to use JCA in a J2EE container, you first must have a JCA resource adapter, which resembles a JDBC driver. A JCA adapter is specific to an EIS (for example SAP or PeopleSoft) and is contained in a Resource Adapter Archive (RAR) file composed of the jar files and native libraries necessary to deploy the resource adapter on a J2EE container. A JCA adapter interacts with a J2EE server with system contracts. They enable the J2EE server to propagate the context in which a JCA adapter is being called.

You'll find three types of system contracts: