package com.googlecode.jmxtrans.util;

import java.net.DatagramSocket;

import org.apache.commons.pool.BaseKeyedPoolableObjectFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Allows us to pool socket connections.
 */
public class DatagramSocketFactory extends BaseKeyedPoolableObjectFactory {

    @SuppressWarnings("unused")
    private static final Logger log = LoggerFactory.getLogger(DatagramSocketFactory.class);

    /** constructor */
    public DatagramSocketFactory() {}

    /**
     * Creates the socket and the writer to go with it.
     */
    @Override
    public Object makeObject(Object key) throws Exception {
        return new DatagramSocket();
    }

    /**
     * Closes the socket.
     */
    @Override
    public void destroyObject(Object key, Object obj) throws Exception {
        DatagramSocket socket = (DatagramSocket) obj;
        socket.close();
    }

    /**
     * Validates that the socket is good.
     */
    @Override
    public boolean validateObject(Object key, Object obj) {
        DatagramSocket socket = (DatagramSocket) obj;
        return !socket.isClosed();
    }
}