jpl.mipl.mdms.web.domain
Class ConnectionPoller

java.lang.Object
  jpl.mipl.mdms.web.domain.ConnectionPoller

public class ConnectionPoller
extends Object

Purpose: Periodically polls server groups for connection metrics.

   Copyright 2006, California Institute of Technology.
   ALL RIGHTS RESERVED.
   U.S. Government Sponsorship acknowledge. 2006.
   

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 Modification History :
 ----------------------

 Date              Who              What
 ----------------------------------------------------------------------------
 09/15/2006        Nick             Initial Release
 ============================================================================
 

Version:

$Id: ConnectionPoller.java,v 1.4 2007/08/29 21:56:35 awt Exp $

Author:

Nicholas Toole (Nicholas.T.Toole@jpl.nasa.gov)

Field Summary

protected ChannelManager	channelManager
protected MessageUtil	messageUtil
protected TimerTask	timerTask
protected Timer	timerThread
protected long	waitTime

Constructor Summary

ConnectionPoller(ChannelManager manager, long waitTime)
Constructor

Method Summary

void	cancel() Stops the scheduler
protected void	init()
void	poll() Polls all server groups.
protected void	pollChannel(String groupName, Channel channel) Poll a particular channel
void	start() Start the scheduler to periodically poll server groups

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

channelManager

protected ChannelManager channelManager

waitTime

protected long waitTime

timerThread

protected Timer timerThread

timerTask

protected TimerTask timerTask

messageUtil

protected MessageUtil messageUtil

Constructor Detail

ConnectionPoller

public ConnectionPoller(ChannelManager manager,
                        long waitTime)

Constructor

Parameters:

manager - Channel manager

waitTime - Number of milliseconds between polling instances

Method Detail

init

protected void init()

poll

public void poll()

Polls all server groups.

pollChannel

protected void pollChannel(String groupName,
                           Channel channel)

Poll a particular channel

Parameters:

groupName - Name of the server group to be polled

channel - Channel to which request will be written

start

public void start()

Start the scheduler to periodically poll server groups

cancel

public void cancel()

Stops the scheduler