org.springframework.jdbc.datasource

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    NOTE: Within special class loading environments such as OSGi, this class is effectively superseded by SimpleDriverDataSource due to general class loading issues with the JDBC DriverManager that be resolved through direct Driver usage (which is exactly what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