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/*
* SIP Communicator, the OpenSource Java VoIP and Instant Messaging clitent.
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*
* ContactTimerSSHImpl.java
*
* SSH Suport in SIP Communicator - GSoC' 07 Project
*/
package net.java.sip.communicator.impl.protocol.ssh;
import java.io.IOException;
import java.net.*;
import java.util.*;
import net.java.sip.communicator.util.*;
/**
* Timer Task to update the reachability status of SSH Contact in contact list.
* (Reachability of remote machine from user's machine)
* The timer is started at either of the two places
* - A new contact - OperationSetPersistentPresenceSSHImpl
* .createUnresolvedContact
* - Existing Contact - OperationSetPersistentPresenceSSHImpl.subscribe
*
* @author Shobhit Jindal
*/
public class ContactTimerSSHImpl
extends TimerTask
{
private static final Logger logger
= Logger.getLogger(OperationSetFileTransferSSHImpl.class);
/**
* The contact ID of the remote machine
*/
private ContactSSH sshContact;
/**
* PersistentPresence Identifer assoiciated with SSH Contact
*/
private OperationSetPersistentPresenceSSHImpl persistentPresence;
/**
* The method which is called at regular intervals to update the status
* of remote machines
*
* Presently only ONLINE and OFFILINE status are checked
*/
public void run()
{
try
{
InetAddress remoteMachine = InetAddress.getByName(
sshContact.getSSHConfigurationForm().getHostName());
//check if machine is reachable
if(remoteMachine.isReachable(
sshContact.getSSHConfigurationForm().getUpdateInterval()))
{
if (sshContact.getPresenceStatus().equals(SSHStatusEnum.OFFLINE)
|| sshContact.getPresenceStatus().equals(SSHStatusEnum
.NOT_AVAILABLE))
{
// change status to online
persistentPresence.changeContactPresenceStatus(
sshContact, SSHStatusEnum.ONLINE);
if (logger.isDebugEnabled())
logger.debug("SSH Host " + sshContact
.getSSHConfigurationForm().getHostName() + ": Online");
}
}
else throw new IOException();
}
catch (IOException ex)
{
if (sshContact.getPresenceStatus().equals(SSHStatusEnum.ONLINE)
|| sshContact.getPresenceStatus().equals(
SSHStatusEnum.NOT_AVAILABLE))
{
persistentPresence.changeContactPresenceStatus(
sshContact, SSHStatusEnum.OFFLINE);
if (logger.isDebugEnabled())
logger.debug("SSH Host " + sshContact.getSSHConfigurationForm()
.getHostName() + ": Offline");
}
}
}
/**
* Creates a new instance of ContactTimerSSHImpl
*
* @param sshContact the <tt>Contact</tt>
*/
public ContactTimerSSHImpl(ContactSSH sshContact)
{
super();
this.sshContact = sshContact;
this.persistentPresence = (OperationSetPersistentPresenceSSHImpl)
sshContact.getParentPresenceOperationSet();
}
}
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