/// <summary>
/// Fires the Channel Pool Collected event after the timer fires and a pool cleanup/collection
/// has occured.
/// </summary>
/// <param name="cpea"></param>
protected void OnChannelPoolCollected(ChannelPoolCollectedEventArgs cpea)
{
if (ChannelPoolCollected != null)
{
ChannelPoolCollected(this, cpea);
}
}
/// <summary>
/// The callback method that scans the pool for any end-of-life channels and purges them
/// from the pool. This routine does not hold any locks so has to be pretty resilient about
/// accessing and disposing of the channels which may well be used or removed at the time the
/// cleanup occurs.
/// </summary>
//private void PoolCleanup(object sender, ElapsedEventArgs e)
private void PoolCleanup()
{
Debug.WriteLine("in PoolCleanup event....");
while (_runCleanupTask)
{
Thread.Sleep(Config.CleanupInterval * 1000);
int currentChannelCount = 0;
lock (_repopulateThread)
{
DebugMessage("Cleanup process is checking pool status");
if (_channelList.Count > 0)
{
int latestCount = _channelList.Count - 1;
for (int cnt = latestCount; cnt >= 0; cnt--)
{
try
{
ChannelContext <TChannel> ch = _channelList[cnt];
if (IsChannelExpired(ch))
{
DebugMessage(
string.Format(
"channel found that needs to be removed. ChannelOpened:{0}, Current Time:{1}",
ch.DateTimeOpened.ToShortTimeString(), DateTime.Now.ToShortTimeString()));
// needs to be purged.
try
{
_channelList.RemoveAt(cnt);
currentChannelCount++;
if (((ICommunicationObject)ch.Channel).State == CommunicationState.Opened || ((ICommunicationObject)ch.Channel).State == CommunicationState.Created)
{
((ICommunicationObject)ch.Channel).Close();
}
}
catch (CommunicationException ce)
{
// do nothing here as well, the channel was already in a faulted state.
DebugMessage("Channel to be removed was already in a faulted state");
}
catch (Exception ex)
{
// To get here means the number of channels in the pool was exhaused in between accessing the
// initial element, so we leave things as they are and let the asynch process refill the pool.
DebugMessage("Unable to remove channel. [" + ex.Message + "]");
}
}
}
catch
{
// and again, we dont care if we are out of range
continue;
}
}
}
}
// Fire the ChannelPoolCollected event.
ChannelPoolCollectedEventArgs cpea = new ChannelPoolCollectedEventArgs(currentChannelCount);
OnChannelPoolCollected(cpea);
}
}
