<Resource name="jdbc/test_mysql" auth="Container" type="javax.sql.DataSource"
        initialSize="5"
        maxActive="10"
        maxIdle="10"
        minIdle="5"
		maxWait ="10000"
        username="test_jndi" password="test_jndi" 
        driverClassName="com.mysql.jdbc.Driver"
        validationQuery="SELECT 1"
        testOnBorrow="true"
        url="jdbc:mysql://127.0.0.1:3306/test_schema"
        factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"/>

Context initContext = new InitialContext();
Context envContext  = (Context)initContext.lookup("java:/comp/env");
DataSource ds = (DataSource)envContext.lookup("jdbc/test_mysql");
Connection conn = ds.getConnection();