PostgreSQL JDBC example with Spring Transactions

Using PostgreSQL JDBC with Spring.

This article came about after a user filed an issue on the JDBC list

The specific issue is that I’m using SimpleJdbcCall.execute() to call the database and getting back a Jdbc4Array. When I then try to do something like Jdbc4Array.getArray() I get a SQL error that can be tracked down to the Jdbc driver trying to use a connection object which has already been closed by the Spring Framework.

The problem is that once you get the array back more work has to be done to get the values out of it. The following code is an example of how to use transactions with spring and PostgreSQL JDBC

Simple interface to get a value out of an array Implementation which does the actual work Note the @Transaction annotation on line 22, this is required to ensure that the connection is not closed after the first call on line 42 without this annotation spring would close the connection and the next line 43 would throw an exception. The constructor line 27 is required for spring to create the implementation and inject the datasource defined in the context Spring context SQL to create function and data Code for this can be found here SpringTransactionExample
Thanks to Michael Miller for the initial code used in this example