/// <summary>
/// Fire the Channel retrieved event when a channel is removed from the pool
/// </summary>
/// <param name="cea"></param>
protected void OnChannelRetrieved(ChannelRetrievedEventArgs cea)
{
if (ChannelRetrieved != null)
{
ChannelRetrieved(this, cea);
}
}
/// <summary>
/// Returns the Channel Context object which encapsulates the channel itself.
/// </summary>
/// <returns></returns>
public ChannelContext <TChannel> GetChannelContext()
{
ChannelContext <TChannel> channCtxt = null;
if (Monitor.TryEnter(_repopulateLock, Constants.LOCK_ATTEMPT_PERIOD))
{
bool channelRetrieved = false;
try
{
if (_channelList.Count == 0)
{
RefillPool(false);
}
while (channCtxt == null)
{
//chan = _channelList[0];
ChannelContext <TChannel> tmpCtxt = _channelList[0];
// Double check the lease time.
if (!IsChannelExpired(tmpCtxt))
{
channCtxt = tmpCtxt;
channelRetrieved = true;
}
// whether expired or not, The channel must be removed from the pool
_channelList.RemoveAt(0);
}
// If all the channels have expired, in this tight loop we may need to refill the pool.
if (_channelList.Count == 0)
{
RefillPool(false);
}
if (channCtxt == null)
{
throw new Exception(Constants.EXCEPTION_CANNOT_OBTAIN_CHANNEL_FROM_POOL);
}
}
finally
{
Monitor.Exit(_repopulateLock);
if (channelRetrieved)
{
ChannelRetrievedEventArgs cea = new ChannelRetrievedEventArgs();
cea.RemainingChannelsInPool = _channelList.Count;
OnChannelRetrieved(cea);
}
}
return(channCtxt);
}
else
{
throw new Exception(Constants.EXCEPTION_CANNOT_OBTAIN_LOCK_GETCHANNEL);
}
}