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Getting A Data Source From Tomcat

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        // You can setup a data source in tomcat using a context file
// or you can set one up using the Administration web pages
// as well. Either way you do it, here is the simple code to
// get the data source from Tomcat so you can start pulling
// out database connections.

// Obtain our environment naming context
Context initCtx = new InitialContext();
Context envCtx = (Context) initCtx.lookup("java:comp/env");

// Look up our data source by the name we gave it when we created it. 
// In this case that's "jdbc/EmployeeDB".
DataSource ds = (DataSource) envCtx.lookup("jdbc/EmployeeDB");