package edu.vt.marian.uip;

import java.io.*;
import java.net.*;
import java.util.*;

import edu.vt.marian.common.*;




/**
	class name:  server_uip_receiver_manage
	class description: this thread is responsible for informing the server_uip
		_receiver_table to delete server_uip_receivers whose status is not "ok"
		from time to time.
	<p>uses the services of class(es): 
	designer(s): Jianxin Zhao (jxzhao@csgrad.cs.vt.edu)
	implementator(s): 
	finished time: 
	known bugs: 
	JDK version: 1.1.5
	side effects:

*/

public class server_uip_receiver_manage extends Thread
{

	/** this is just used for debugging
	*/
	Debug debug;

	/** this is the server uip receiver table which will be informed
		to clean bad receivers from time to time by this object
	*/
	private server_uip_receiver_table surt;

	/** currently, this value is the time interval that this object
		will inform receiver table to clean bad receivers
	*/
	private int check_interval = 420000;


	/**
		method description: this constructor will create a server_uip_receiver
			_manage object.
		<p>uses the services of class(es):
		input parameter(s):
			surt -- the server_uip_receiver_table which created this object
			debug -- used for debugging
		output parameter(s): none
		return value: none
		synchronization consideration: none
	*/      
	public server_uip_receiver_manage(server_uip_receiver_table surt,
		Debug debug)
	{
		this.debug = debug;
		if (surt == null)
		{
			debug.dumpTrace("class server_uip_receiver_manage, constructor, parameter server_uip_receiver_table is null");
			return;
		}
		this.surt = surt;
		return;
	}


	/**
		method description: this method of the thread will inform server_uip_
			receiver_table to delete server_uip_receivers whose status is not
			"ok" from time to time.
		<p>uses the services of class(es): 
		input parameter(s): none
		output parameter(s): none
		return value: none
		synchronization consideration: none
	*/     
	public void run()
	{
		// implementation required
		while (true)
		{
			// first sleep some time
			try
			{
				sleep(check_interval);
			}
			catch (Exception e)
			{
				debug.dumpTrace("class server_uip_receiver_manage, method run, error happened when sleeping");
				return;
			}

			// then inform the server uip receiver table to delete bad
			// receivers
			surt.clean();
		}
	}
}