Pattern for connecting to different databases using JDBC

Question

I\'m writing an application which has to be configurable to connect to Oracle, SQL Server and MySQL depending on client whim.

Up till now I\'d been planning on using the

Answer 1

Take a look at Datasource. This is the preferred mechanism for obtaining a database connection.

IMO this provides an adminstrator the greatest flexibility for choosing database, connection pooling, and transaction strategies.

If you're using tomcat, then see here for how to register a Datasource with tomcat's JNDI.

If you're using Spring, then you can obtain a Datasource using jee:jndi-lookup.

If you're using Spring, but don't want to use JNDI, take a look at DriverManagerDataSource for a discussion of how to obtain a pooled Datasource (DBCP or C3P0).