TcpIdleSender.java

package com.esotericsoftware.kryonet.util;

import com.esotericsoftware.kryonet.Connection;
import com.esotericsoftware.kryonet.Listener;

abstract public class TcpIdleSender extends Listener {
	boolean started;

	public void idle(Connection connection) {
		if (!started) {
			started = true;
			start();
		}
		Object object = next();
		if (object == null)
			connection.removeListener(this);
		else
			connection.sendTCP(object);
	}

	/**
	 * Called once, before the first send. Subclasses can override this method
	 * to send something so the receiving side expects subsequent objects.
	 */
	protected void start() {
	}

	/**
	 * Returns the next object to send, or null if no more objects will be sent.
	 */
	abstract protected Object next();
}