ConnectionPoolBasics.java Source code

Introduction

Here is the source code for ConnectionPoolBasics.java

Source

import java.sql.Connection;
import java.util.Properties;
import java.sql.PreparedStatement;

import org.apache.commons.dbcp.ConnectionFactory;
import org.apache.commons.dbcp.PoolingDriver;
import org.apache.commons.dbcp.PoolingDataSource;
import org.apache.commons.dbcp.DriverConnectionFactory;
import org.apache.commons.dbcp.PoolableConnectionFactory;
import org.apache.commons.dbcp.DriverManagerConnectionFactory;

import org.apache.commons.pool.impl.GenericObjectPool;
import org.apache.commons.pool.KeyedObjectPoolFactory;
import org.apache.commons.pool.impl.GenericKeyedObjectPoolFactory;

public class ConnectionPoolBasics {

    public static void main(String args[]) throws Exception {

        GenericObjectPool gPool = new GenericObjectPool();

        /*Class.forName("com.mysql.jdbc.Driver");
            
        DriverManagerConnectionFactory cf =
           new DriverManagerConnectionFactory(
        "jdbc:mysql://localhost/commons", "root", "");*/

        Properties props = new Properties();
        props.setProperty("Username", "root");
        props.setProperty("Password", "");
        ConnectionFactory cf = new DriverConnectionFactory(new com.mysql.jdbc.Driver(),
                "jdbc:mysql://localhost/commons", props);

        KeyedObjectPoolFactory kopf = new GenericKeyedObjectPoolFactory(null, 8);

        PoolableConnectionFactory pcf = new PoolableConnectionFactory(cf, gPool, kopf, null, false, true);

        for (int i = 0; i < 5; i++) {
            gPool.addObject();
        }

        // PoolingDataSource pds = new PoolingDataSource(gPool);
        PoolingDriver pd = new PoolingDriver();
        pd.registerPool("example", gPool);

        for (int i = 0; i < 5; i++) {
            gPool.addObject();
        }

        Connection conn = java.sql.DriverManager.getConnection("jdbc:apache:commons:dbcp:example");

        System.err.println("Connection: " + conn); //": Delegate: " + ((org.apache.commons.dbcp.PoolingConnection)conn).getDelegate());

        // do some work with the connection
        PreparedStatement ps = conn.prepareStatement("Select * from customer where id = ?");

        System.err.println("Active: " + gPool.getNumActive() + ", Idle: " + gPool.getNumIdle());

        conn.close();

        System.err.println("Active: " + gPool.getNumActive() + ", Idle: " + gPool.getNumIdle());

    }
}