Where should I create the DataSource ?

Question

I have an application which uses the Tomcat Connection Pooling.
Its running fine with the following code:
DataSource dataSource = (DataSource) envCtx.lookup(contextName);
conn = dataSource.getConnection();
My First Question: If it really a connection-pooling happening here bcoz I am creating DataSource object for each request ??
But After reading the DataSource documentation I found that this is a same as DriverManager so It seems I shouldn't do it for each request and I need to create DataSource object once and that object should be used by each request..
Please clarify me If I am wrong and I can use my existing code.
Rgds,
- Amit

Answer 1

I would do it for each request. i like to use database resources in the narrowest scope possible, preferrably method scope. that way i get a connection, get what i want, and return it to the pool for someone else to use. it's more scalable that way, imo. the connection pool amortizes the cost of creating all those connections.
%