private static void ProcessWatcher(IEnumerable <IWatcher> watchers, WatchedEvent watchedEvent)
{
foreach (IWatcher watcher in watchers)
{
try
{
if (null != watcher)
{
watcher.Process(watchedEvent);
}
}
catch (Exception t)
{
LOG.Error("Error while calling watcher ", t);
}
}
}
public void QueueEvent(WatchedEvent @event)
{
if (@event.Type == EventType.None && sessionState == @event.State)
{
return;
}
if (waitingEvents.IsAddingCompleted)
{
throw new InvalidOperationException("consumer has been disposed");
}
sessionState = @event.State;
// materialize the watchers based on the event
var pair = new ClientConnection.WatcherSetEventPair(conn.watcher.Materialize(@event.State, @event.Type, @event.Path), @event);
// queue the pair (watch set & event) for later processing
waitingEvents.Add(pair);
}
public WatcherSetEventPair(IEnumerable <IWatcher> watchers, WatchedEvent @event)
{
this.Watchers = watchers;
this.WatchedEvent = @event;
}
private void ReadResponse(byte[] content)
{
using (var reader = new EndianBinaryReader(EndianBitConverter.Big, new MemoryStream(content), Encoding.UTF8))
{
BinaryInputArchive bbia = BinaryInputArchive.GetArchive(reader);
ReplyHeader replyHdr = new ReplyHeader();
replyHdr.Deserialize(bbia, "header");
if (replyHdr.Xid == -2)
{
// -2 is the xid for pings
if (LOG.IsDebugEnabled)
{
LOG.DebugFormat("Got ping response for sessionid: 0x{0:X} after {1}ms", conn.SessionId, (DateTime.UtcNow.Nanos() - lastPingSentNs) / 1000000);
}
return;
}
if (replyHdr.Xid == -4)
{
// -2 is the xid for AuthPacket
// TODO: process AuthPacket here
if (LOG.IsDebugEnabled)
{
LOG.DebugFormat("Got auth sessionid:0x{0:X}", conn.SessionId);
}
return;
}
if (replyHdr.Xid == -1)
{
// -1 means notification
if (LOG.IsDebugEnabled)
{
LOG.DebugFormat("Got notification sessionid:0x{0}", conn.SessionId);
}
WatcherEvent @event = new WatcherEvent();
@event.Deserialize(bbia, "response");
// convert from a server path to a client path
if (conn.ChrootPath != null)
{
string serverPath = @event.Path;
if (serverPath.CompareTo(conn.ChrootPath) == 0)
{
@event.Path = PathUtils.PathSeparator;
}
else
{
@event.Path = serverPath.Substring(conn.ChrootPath.Length);
}
}
WatchedEvent we = new WatchedEvent(@event);
if (LOG.IsDebugEnabled)
{
LOG.DebugFormat("Got {0} for sessionid 0x{1:X}", we, conn.SessionId);
}
conn.consumer.QueueEvent(we);
return;
}
Packet packet;
/*
* Since requests are processed in order, we better get a response
* to the first request!
*/
if (pendingQueue.TryDequeue(out packet))
{
try
{
if (packet.header.Xid != replyHdr.Xid)
{
packet.replyHeader.Err = (int)KeeperException.Code.CONNECTIONLOSS;
throw new IOException(new StringBuilder("Xid out of order. Got ").Append(replyHdr.Xid).Append(" expected ").Append(packet.header.Xid).ToString());
}
packet.replyHeader.Xid = replyHdr.Xid;
packet.replyHeader.Err = replyHdr.Err;
packet.replyHeader.Zxid = replyHdr.Zxid;
if (replyHdr.Zxid > 0)
{
lastZxid = replyHdr.Zxid;
}
if (packet.response != null && replyHdr.Err == 0)
{
packet.response.Deserialize(bbia, "response");
}
if (LOG.IsDebugEnabled)
{
LOG.DebugFormat("Reading reply sessionid:0x{0:X}, packet:: {1}", conn.SessionId, packet);
}
}
finally
{
FinishPacket(packet);
}
}
else
{
throw new IOException(new StringBuilder("Nothing in the queue, but got ").Append(replyHdr.Xid).ToString());
}
}
}