The Java Connector Architecture(JCA) , part of Java Platform, Enterprise Edition (Java EE), specifies a standard architecture for accessing resources in diverse Enterprise Information Systems(EIS) .
The connector architecture is implemented both in the application server and in an EIS-specific resource adapter.
What is a resource adapter?
Put it simply, a resource adapter is a system library specific to an EIS that provides connectivity to the EIS. You can imagine it like a JDBC driver. The following diagram depicts the Java Connector Architecture's main components:
As you can see, the JCA API is based ...