Summary
This chapter is an overview of the JCA specifications and is intended to help you understand the specifications more easily. You should refer to the JCA specifications, as well as EJB and J2EE specifications, for further details.
The JCA specifications define a set of APIs for extending the application server's capability of integrating external EISs (legacy applications and other non-J2EE enterprise applications). A resource adapter must support two types of application environments: a managed application environment and a non-managed application environment.
In a managed application environment, the application server and the containers do most of the system-level work, such as managing physical connections with the EIS, transactions, ...
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