DataSource

public interface DataSource
implements CommonDataSource, Wrapper

A factory for connections to the physical data source that this DataSource object represents. An alternative to the DriverManager facility, a DataSource object is the preferred means of getting a connection. An object that implements the DataSource interface will typically be registered with a naming service based on the Java^TM Naming and Directory (JNDI) API.

The DataSource interface is implemented by a driver vendor. There are three types of implementations:

1. Basic implementation -- produces a standard Connection object
2. Connection pooling implementation -- produces a Connection object that will automatically participate in connection pooling. This implementation works with a middle-tier connection pooling manager.
3. Distributed transaction implementation -- produces a Connection object that may be used for distributed transactions and almost always participates in connection pooling. This implementation works with a middle-tier transaction manager and almost always with a connection pooling manager.

A DataSource object has properties that can be modified when necessary. For example, if the data source is moved to a different server, the property for the server can be changed. The benefit is that because the data source's properties can be changed, any code accessing that data source does not need to be changed.

A driver that is accessed via a DataSource object does not register itself with the DriverManager. Rather, a DataSource object is retrieved though a lookup operation and then used to create a Connection object. With a basic implementation, the connection obtained through a DataSource object is identical to a connection obtained through the DriverManager facility.

Summary

Inherited methods
From interface javax.sql.CommonDataSource abstract PrintWriter getLogWriter() Retrieves the log writer for this DataSource object. abstract int getLoginTimeout() Gets the maximum time in seconds that this data source can wait while attempting to connect to a database. abstract Logger getParentLogger() Return the parent Logger of all the Loggers used by this data source. abstract void setLogWriter(PrintWriter out) Sets the log writer for this DataSource object to the given java.io.PrintWriter object. abstract void setLoginTimeout(int seconds) Sets the maximum time in seconds that this data source will wait while attempting to connect to a database.
From interface java.sql.Wrapper abstract boolean isWrapperFor(Class<?> iface) Returns true if this either implements the interface argument or is directly or indirectly a wrapper for an object that does. abstract <T> T unwrap(Class<T> iface) Returns an object that implements the given interface to allow access to non-standard methods, or standard methods not exposed by the proxy.

Public methods

Connection getConnection ()

Connection getConnection (String username, 
                String password)