Sun Microsystems 820433510 manual Jdbc Resources

C 3H A P T E R 3

JDBC Resources

This chapter explains how to configure JDBC resources, which are required by applications that access databases. This chapter contains the following sections:

■“JDBC Resources” on page 43

■“JDBC Connection Pools” on page 44

■“How JDBC Resources and Connection Pools Work Together” on page 44

■“Setting Up Database Access” on page 45

■“Working with JDBC Connection Pools” on page 46

■“Configurations for Specific JDBC Drivers” on page 52

JDBC Resources

To store, organize, and retrieve data, most applications use relational databases. Java EE applications access relational databases through the JDBC API.

A JDBC resource (data source) provides applications with a means of connecting to a database. Typically, the administrator creates a JDBC resource for each database accessed by the applications deployed in a domain. (However, more than one JDBC resource can be created for a database.)

To create a JDBC resource, specify a unique JNDI name that identifies the resource. (See the section JNDI Names and Resources.) Expect to find the JNDI name of a JDBC resource in java:comp/env/jdbc subcontext. For example, the JNDI name for the resource of a payroll database could be java:comp/env/jdbc/payrolldb. Because all resource JNDI names are in the java:comp/env subcontext, when specifying the JNDI name of a JDBC resource in the Admin Console, enter only jdbc/name. For example, for a payroll database specify jdbc/payrolldb.

A JDBC resource (data source) provides applications with a means of connecting to a database.

Before creating a JDBC resource, first create a JDBC connection pool.

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