org.springframework.jdbc.datasource

Class DriverManagerDataSource

java.lang.Object

org.springframework.jdbc.datasource.AbstractDataSource

org.springframework.jdbc.datasource.AbstractDriverBasedDataSource

org.springframework.jdbc.datasource.DriverManagerDataSource

All Implemented Interfaces:

java.sql.Wrapper, javax.sql.CommonDataSource, javax.sql.DataSource

Direct Known Subclasses:

SingleConnectionDataSource

public class DriverManagerDataSource
extends AbstractDriverBasedDataSource

Simple implementation of the standard JDBC DataSource interface, configuring the plain old JDBC DriverManager via bean properties, and returning a new Connection from every getConnection call.

NOTE: This class is not an actual connection pool; it does not actually pool Connections. It just serves as simple replacement for a full-blown connection pool, implementing the same standard interface, but creating new Connections on every call.

Useful for test or standalone environments outside of a J2EE container, either as a DataSource bean in a corresponding ApplicationContext or in conjunction with a simple JNDI environment. Pool-assuming Connection.close() calls will simply close the Connection, so any DataSource-aware persistence code should work.

NOTE: Within special class loading environments such as OSGi, this class is effectively superseded by SimpleDriverDataSource due to general class loading issues with the JDBC DriverManager that be resolved through direct Driver usage (which is exactly what SimpleDriverDataSource does).

In a J2EE container, it is recommended to use a JNDI DataSource provided by the container. Such a DataSource can be exposed as a DataSource bean in a Spring ApplicationContext via JndiObjectFactoryBean, for seamless switching to and from a local DataSource bean like this class. For tests, you can then either set up a mock JNDI environment through Spring's SimpleNamingContextBuilder, or switch the bean definition to a local DataSource (which is simpler and thus recommended).

If you need a "real" connection pool outside of a J2EE container, consider Apache's Jakarta Commons DBCP or C3P0. Commons DBCP's BasicDataSource and C3P0's ComboPooledDataSource are full connection pool beans, supporting the same basic properties as this class plus specific settings (such as minimal/maximal pool size etc).

Since:

14.03.2003

Author:

Juergen Hoeller

See Also:

SimpleDriverDataSource

Field Summary

Fields inherited from class org.springframework.jdbc.datasource.AbstractDataSource

logger

Constructor Summary

Constructors

Constructor and Description
DriverManagerDataSource() Constructor for bean-style configuration.
DriverManagerDataSource(java.lang.String url) Create a new DriverManagerDataSource with the given JDBC URL, not specifying a username or password for JDBC access.
DriverManagerDataSource(java.lang.String url, java.util.Properties conProps) Create a new DriverManagerDataSource with the given JDBC URL, not specifying a username or password for JDBC access.
DriverManagerDataSource(java.lang.String url, java.lang.String username, java.lang.String password) Create a new DriverManagerDataSource with the given standard DriverManager parameters.

Method Summary

Modifier and Type	Method and Description
protected java.sql.Connection	getConnectionFromDriver(java.util.Properties props) Obtain a Connection using the given properties.
protected java.sql.Connection	getConnectionFromDriverManager(java.lang.String url, java.util.Properties props) Getting a Connection using the nasty static from DriverManager is extracted into a protected method to allow for easy unit testing.
void	setDriverClassName(java.lang.String driverClassName) Set the JDBC driver class name.

Methods inherited from class org.springframework.jdbc.datasource.AbstractDriverBasedDataSource

getConnection, getConnection, getConnectionFromDriver, getConnectionProperties, getPassword, getUrl, getUsername, setConnectionProperties, setPassword, setUrl, setUsername

Methods inherited from class org.springframework.jdbc.datasource.AbstractDataSource

getLoginTimeout, getLogWriter, getParentLogger, isWrapperFor, setLoginTimeout, setLogWriter, unwrap

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DriverManagerDataSource

public DriverManagerDataSource()

Constructor for bean-style configuration.

DriverManagerDataSource

public DriverManagerDataSource(java.lang.String url)

Create a new DriverManagerDataSource with the given JDBC URL, not specifying a username or password for JDBC access.

Parameters:

url - the JDBC URL to use for accessing the DriverManager

See Also:

DriverManager.getConnection(String)

DriverManagerDataSource

public DriverManagerDataSource(java.lang.String url,
                               java.lang.String username,
                               java.lang.String password)

Create a new DriverManagerDataSource with the given standard DriverManager parameters.

Parameters:

url - the JDBC URL to use for accessing the DriverManager

username - the JDBC username to use for accessing the DriverManager

password - the JDBC password to use for accessing the DriverManager

See Also:

DriverManager.getConnection(String, String, String)

DriverManagerDataSource

public DriverManagerDataSource(java.lang.String url,
                               java.util.Properties conProps)

Create a new DriverManagerDataSource with the given JDBC URL, not specifying a username or password for JDBC access.

Parameters:

url - the JDBC URL to use for accessing the DriverManager

conProps - JDBC connection properties

See Also:

DriverManager.getConnection(String)

Method Detail

setDriverClassName

public void setDriverClassName(java.lang.String driverClassName)

Set the JDBC driver class name. This driver will get initialized on startup, registering itself with the JDK's DriverManager.

NOTE: DriverManagerDataSource is primarily intended for accessing pre-registered JDBC drivers. If you need to register a new driver, consider using SimpleDriverDataSource instead. Alternatively, consider initializing the JDBC driver yourself before instantiating this DataSource. The "driverClassName" property is mainly preserved for backwards compatibility, as well as for migrating between Commons DBCP and this DataSource.

See Also:

DriverManager.registerDriver(java.sql.Driver), SimpleDriverDataSource

getConnectionFromDriver

protected java.sql.Connection getConnectionFromDriver(java.util.Properties props)
                                               throws java.sql.SQLException

Description copied from class: AbstractDriverBasedDataSource

Obtain a Connection using the given properties.

Template method to be implemented by subclasses.

Specified by:

getConnectionFromDriver in class AbstractDriverBasedDataSource

Parameters:

props - the merged connection properties

Returns:

the obtained Connection

Throws:

java.sql.SQLException - in case of failure

getConnectionFromDriverManager

protected java.sql.Connection getConnectionFromDriverManager(java.lang.String url,
                                                             java.util.Properties props)
                                                      throws java.sql.SQLException

Getting a Connection using the nasty static from DriverManager is extracted into a protected method to allow for easy unit testing.

Throws:

java.sql.SQLException

See Also:

DriverManager.getConnection(String, java.util.Properties)