/// <summary>
/// This method disables future heartbeats and flushes any servers that
/// may be in the heartbeat path out of that code path before further
/// forward progress is allowed.
/// </summary>
public void DrainHeartbeats()
{
//
// Prevent new requestors from spinning up new heartbeat requests.
//
HeartbeatsEnabled = false;
//
// Flush any in-flight requestors out of the heartbeat path by
// ensuring that they have released synchronization.
//
Monitor.Enter(HeartbeatLock);
Monitor.Exit(HeartbeatLock);
//
// Stop all of the active timers. New timers that have elapsed
// will have already completed starting the timer again or will now
// observe that future timer restarts are already forbidden.
//
PendingGameServersSweepTimer.Stop();
ScavengerSweepTimer.Stop();
BlacklistSweepTimer.Stop();
}
/// <summary>
/// Queue initial heartbeats to active servers
/// </summary>
public void QueueInitialHeartbeats()
{
DateTime Now = DateTime.UtcNow;
uint HeartbeatsStarted = 0;
lock (ActiveServerTable)
{
foreach (var Pair in ActiveServerTable)
{
NWGameServer Server = Pair.Value;
lock (Server)
{
if (!Server.Online)
{
continue;
}
Server.InitialHeartbeat = true;
Server.StartHeartbeat();
HeartbeatsStarted += 1;
}
}
}
Logger.Log(LogLevel.Normal, "NWServerTracker.QueueInitialHeartbeats(): Queued {0} initial server heartbeat requests.", HeartbeatsStarted);
PendingGameServersSweepTimer.Start();
ScavengerSweepTimer.Start();
BlacklistSweepTimer.Start();
}
/// <summary>
/// This timer callback runs when the blacklist sweep timer elapses.
/// Its purpose is to trigger a periodic refresh of the blacklist from
/// the database.
/// </summary>
/// <param name="sender">Unused.</param>
/// <param name="e">Unused.</param>
private void BlacklistSweepTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
try
{
RefreshBlacklist();
}
catch (Exception ex)
{
Logger.Log(LogLevel.Error, "NWServerTracker.BlacklistSweepTimer_Elapsed(): Exception refreshing blacklist: {0}", ex);
}
lock (HeartbeatLock)
{
if (!HeartbeatsEnabled)
{
return;
}
BlacklistSweepTimer.Start();
}
}
