Managing pooling datasource in Java web app with singleton class, Tomcat, C3P0
import java.beans.PropertyVetoException;
import java.sql.*;
import javax.sql.*;
import javax.naming.*;
import com.mchange.v2.c3p0.*;

public class MyDataSource {

private static MyDataSource mds = new MyDataSource();
public static DataSource ds;

private MyDataSource() {
    try {
        ds = getDataSource();
    } catch (NamingException e) {
        e.printStackTrace();
    }
}

public static MyDataSource getInstance(){
    return mds;
}

public Connection getConnection() throws SQLException, NamingException {
    Connection myConnect = ds.getConnection();
    return myConnect;
}

private DataSource getDataSource() throws NamingException {

    ComboPooledDataSource cpds = new ComboPooledDataSource();
    try {
        cpds.setDriverClass( "com.mysql.jdbc.Driver" );
    } catch (PropertyVetoException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    cpds.setJdbcUrl( "jdbc:mysql://195.195.xx.xx:3306/dbName" );
    cpds.setUser("lemmy");
    cpds.setPassword("xxx");
    cpds.setMaxIdleTime(180);
    cpds.setMaxPoolSize(100);
    return cpds;
}
 }

import java.sql.*;
import javax.sql.*;
import javax.naming.*;

public class DbConnection {

public Connection c;

public DbConnection() throws NamingException, SQLException {
    c = getConnection();
}

public Connection getConnection() throws SQLException, NamingException {
    Connection myConnect = MyDataSource.getInstance().getConnection();
    return myConnect;
}

public void close(){
    JDBCUtils.close(this.c);
}
}

import java.sql.*;

public class JDBCUtils {

static public void close (ResultSet rs) {
    try { if (rs!=null) rs.close(); } catch (Exception e) {}
    }

  //  Works for PreparedStatement also since it extends Statement.
  static public void close (Statement stmt) {
    try { if (stmt!=null) stmt.close(); } catch (Exception e)   {}
    }

  static public void close (java.sql.Connection conn) {
    try { if (conn!=null) conn.close(); } catch (Exception e) {}
    }

}

String myQuery = null;
    DbConnection myConnect = null;
    Statement myStatement = null;
    ResultSet rs = null;

    try {
       myConnect = new DbConnection();
        myStatement = myConnect.c.createStatement();

                // Do stuff here

        }catch (SQLException e) {
    out.println("SQL Error: "+e);
    } finally {
        JDBCUtils.close(rs);
        JDBCUtils.close(myStatement);
        myConnect.close();
    }