/// <summary>
/// Implements IOutboundTransport.UnsubscribeClient
/// </summary>
public void UnsubscribeClient(string clientId)
{
if (_disposed)
{
throw new ObjectDisposedException(GetType().FullName);
}
if (string.IsNullOrEmpty(clientId))
{
throw new ArgumentNullException("clientId");
}
TlsClient client = null;
_listLock.AcquireReaderLock(DEFAULT_JOIN_TIMEOUT);
try
{
if (!_clients.ContainsKey(clientId))
{
throw new TransportException("Client not subscribed to transport");
}
client = _clients[clientId];
//Remove
LockCookie ck = _listLock.UpgradeToWriterLock(DEFAULT_JOIN_TIMEOUT);
try
{
_clients.Remove(clientId);
}
finally
{
_listLock.DowngradeFromWriterLock(ref ck);
}
}
finally
{
_listLock.ReleaseReaderLock();
if (client != null)
{
try
{
client.Stream.Flush();
}
catch
{
}
finally
{
client.Dispose();
}
}
}
}
private void CleanupClients(object state)
{
List <string> toRemove = new List <string>();
/* Scan for dead clients
* According to MSDN, a client will be detected to be dead
* only after a failed I/O.
* If no messages run on channel, lots of dead clients won't be
* discovered. This is why we force flushing the stream: if client
* is dead, IOException is triggered and Connected is set to false
*/
_listLock.AcquireReaderLock(DEFAULT_JOIN_TIMEOUT);
try
{
foreach (KeyValuePair <string, TlsClient> kvp in _clients)
{
try
{
kvp.Value.Stream.Flush();
}
catch (IOException)
{
} //Flush did its real job
if (!kvp.Value.Client.Connected)
{
toRemove.Add(kvp.Key);
}
}
if (toRemove.Count > 0)
{
LockCookie ck = _listLock.UpgradeToWriterLock(DEFAULT_JOIN_TIMEOUT);
try
{
foreach (string id in toRemove)
{
try
{
TlsClient client = _clients[id];
_clients.Remove(id);
client.Dispose();
}
catch (KeyNotFoundException ex)
{
//Strange
Log.Debug("Error occurred when purging dead TLS client: {0}", ex.Message);
}
}
}
finally
{
_listLock.DowngradeFromWriterLock(ref ck);
}
}
}
finally
{
_listLock.ReleaseReaderLock();
}
if (toRemove.Count > 0)
{
Log.Notice("TLS transport {0} cleaned up {1} dead clients", GetHashCode(), toRemove.Count);
}
}
