Обсуждение: class loading ...

hello,

i haven't found a way to load dynamically a jdbc3 driver.

for basic driver i use :
    Class.forName( "org.postgresql.Driver" ) ;
    Connection con = DriverManager.getConnection( url , login , pwd ) ;
    ...

but with Jdbc3PoolingDateSource it doesn't work. i tried :
    Class.forName( "org.postgresql.Driver" ) ;
    Jdbc3PoolingDateSource source = new Jdbc3PoolingDateSource() ;
    ...
or :
    Class.forName( "org.postgresql.jdbc3.Jdbc3PoolingDateSource" ) ;
    Jdbc3PoolingDateSource source = new Jdbc3PoolingDateSource() ;
    ...
but it doesn't work. to make it i have to specify :
    org.postgresql.jdbc3.Jdbc3PoolingDateSource source =
        new org.postgresql.jdbc3.Jdbc3PoolingDateSource() ;
    ...

but it not dynamically loaded.

thanks, paul.

On Mon, Jan 13, 2003 at 11:53:13AM +0100, paul guermonprez wrote:
> hello,
>
> i haven't found a way to load dynamically a jdbc3 driver.

[...]

> but it doesn't work. to make it i have to specify :
>     org.postgresql.jdbc3.Jdbc3PoolingDateSource source =
>         new org.postgresql.jdbc3.Jdbc3PoolingDateSource() ;
>     ...
>
> but it not dynamically loaded.

If you want to dynamically load a datasource try something like:

  Class dsClass = Class.forName("datasource.class.name.here");
  javax.sql.DataSource ds = (javax.sql.DataSource)dsClass.newInstance();

then use reflection to configure the datasource (see the JDBC spec for
standardized methods). The same approach works for ConnectionPoolDataSource.

-O