Resource adapter

 

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A resource adapter is a system-level software driver that a Java application uses to connect to an enterprise information system (EIS).

A resource adapter plugs into an application server and provides connectivity between the EIS, the application server, and the enterprise application.

An application server vendor extends its system once to support the J2EE Connector Architecture (JCA) and is then assured of seamless connectivity to multiple EISs. Likewise, an EIS vendor provides one standard resource adapter with the capability to plug into any application server that supports the connector architecture.

WebSphere Application Server provides the WebSphere Relational Resource Adapter (RRA) implementation. This resource adapter provides data access through JDBC calls to access the database dynamically. The connection management is based on the JCA connection management architecture. It provides connection pooling, transaction, and security support. WAS version 6.0 supports JCA versions 1.0 and 1.5.

Data access for container-managed persistence (CMP) beans is managed by the WebSphere Persistence Manager indirectly. The JCA specification supports persistence manager delegation of the data access to the JCA resource adapter without knowing the specific backend store. For the relational database access, the persistence manager uses the relational resource adapter to access the data from the database. We can find the supported database platforms for the JDBC API at the WAS prerequisite Web site.

 

See also

J2EE Connector Architecture resource adapters
WebSphere relational resource adapter settings
WebSphere Relational Resource Adapter
Data access portability features

 

See Also

Resource adapter archive file
Connection factory
Connection pooling

 

Related Tasks

Configuring connection factories for resource adapters within applications
Configuring J2EE Connector connection factories in the administrative console
Installing resource adapters within applications
Installing J2EE Connector resource adapters
Configuring data access with scripting
Accessing data using J2EE Connector Architecture connectors

 

See Also

Configuring administered objects

 

Related Information


http://www-3.ibm.com/software/webservers/appserv/doc/latest/prereq.html