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 Java EE 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is effectively superseded by SimpleDriverDataSource due to general class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 Java EE 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 Java EE container, consider
Apache Commons DBCP
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).
public DriverManagerDataSource(java.lang.String url,
Create a new DriverManagerDataSource with the given JDBC URL,
not specifying a username or password for JDBC access.
url - the JDBC URL to use for accessing the DriverManager
conProps - the JDBC connection properties
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.