Can I use same connection pool on multiple web app?

Question

Hi,
I have several web applications on my domain, and they all share the same database.
I am using TOMCAT 4, and I've wrote my own pool, but the problem is that there are also some other domains on the server, so I can't put my connection pool in the tomcat's share or common directory.
Right now, I am thinking of switching to use tomcat's datasource implementation. How do I configure the datasource so that all my web apps will use the same connection pool?
Thanks!

Answer 1

There's no actual webapp configuration when using Datasources... your Java code accesses the Datasource through JNDI:
     Connection con = null;
     String dataSourceName = "someDataSource"
     try {
          Hashtable parms = new Hashtable();
          parms.put(Context.INITIAL_CONTEXT_FACTORY, "com.ibm.ejs.ns.jndi.CNInitialContextFactory");
          Context ctx = new InitialContext(parms);
          javax.sql.DataSource ds = (javax.sql.DataSource)ctx.lookup(dataSourceName);
          con = ds.getConnection();
     } catch (NamingException e) {
          throw new SQLException("NamingException - " + e.toString());
     }If you want, you can keep the DataSource name in the application's ServletContext, so that you don't hard code it into your Java code.