Sun Microsystems Sun GlassFish Enterprise Server 2.1, Administration Manual

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Connector Resources
This chapter explains how to configure connectors, which are used to access enterprise
information systems (EISs). This chapter contains the following sections:
■
“An Overview of Connectors” on page 81
■
“Managing Connector Connection Pools” on page 82
■
“Managing Connector Resources” on page 88
■
“Managing Administered Object Resources” on page 90
An Overview of Connectors
Also called a resource adapter, a connector module is a Java EE component that enables
applications to interact with enterprise information systems (EISs). EIS software includes
various types of systems: enterprise resource planning (ERP), mainframe transaction
processing, and non-relational databases, among others. Like other Java EE modules, to install a
connector module you deploy it.
A connector connection pool is a group of reusable connections for a particular EIS. To create a
connector connection pool, specify the connector module (resource adapter) that is associated
with the pool.
A connector resource is a program object that provides an application with a connection to an
EIS. To create a connector resource, specify its JNDI name and its associated connection pool.
Multiple connector resources can specify a single connection pool. The application locates the
resource by looking up its JNDI name. (For more information on JNDI, see the section JNDI
Names and Resources.) The JNDI name of a connector resource for an EIS is usually in the
java:comp/env/
eis-specific subcontext.
The Enterprise Server implements JMS by using a connector module (resource adapter). See the
section, The Relationship Between JMS Resources and Connector Resources.
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