private async Task Watcher_OnChange(string path, Watcher.Event.KeeperState keeperState, Watcher.Event.EventType eventType)
{
switch (keeperState)
{
case Watcher.Event.KeeperState.Expired:
Logger.LogWarning($"ZooKeeper has been {keeperState},Reconnecting...");
ZooKeeperSessionId = 0;
CreateZooKeeperClient();
break;
case Watcher.Event.KeeperState.Disconnected:
Logger.LogWarning($"ZooKeeper has been {keeperState},Reconnecting...");
CreateZooKeeperClient();
break;
case Watcher.Event.KeeperState.SyncConnected:
if (ZooKeeperSessionId == 0)
{
ZooKeeperSessionId = ZooKeeper.getSessionId();
}
await SubscribeNodes(path, eventType);
break;
}
}
/**
* Callback invoked by the ClientCnxnSocket once a connection has been
* established.
*
* @param _negotiatedSessionTimeout
* @param _sessionId
* @param _sessionPasswd
* @param isRO
* @throws IOException
*/
internal void onConnected(int _negotiatedSessionTimeout, long _sessionId,
byte[] _sessionPasswd, bool isRO)
{
negotiatedSessionTimeout.Value = _negotiatedSessionTimeout;
if (negotiatedSessionTimeout.Value <= 0)
{
state.Value = ZooKeeper.States.CLOSED;
queueEvent(new WatchedEvent(
Watcher.Event.EventType.None,
Watcher.Event.KeeperState.Expired, null));
queueEventOfDeath();
throw new SessionExpiredException("Unable to reconnect to ZooKeeper service, session 0x" +
sessionId.ToHexString() + " has expired");
}
if (!readOnly && isRO)
{
LOG.error("Read/write client got connected to read-only server");
}
readTimeout = negotiatedSessionTimeout.Value * 2 / 3;
connectTimeout = negotiatedSessionTimeout.Value / hostProvider.size();
hostProvider.onConnected();
sessionId = _sessionId;
sessionPasswd = _sessionPasswd;
state.Value = (isRO) ? ZooKeeper.States.CONNECTEDREADONLY : ZooKeeper.States.CONNECTED;
seenRwServerBefore.Value |= !isRO;
LOG.info("Session establishment complete on server " + clientCnxnSocket.getRemoteSocketAddress() +
", sessionid = 0x" + sessionId.ToHexString()
+ ", negotiated timeout = " + negotiatedSessionTimeout.Value
+ (isRO ? " (READ-ONLY mode)" : ""));
Watcher.Event.KeeperState eventState = (isRO)
? Watcher.Event.KeeperState.ConnectedReadOnly
: Watcher.Event.KeeperState.SyncConnected;
queueEvent(new WatchedEvent(
Watcher.Event.EventType.None, eventState, null));
}
/**
* Convert a WatcherEvent sent over the wire into a full-fledged WatcherEvent
*/
internal WatchedEvent(WatcherEvent eventMessage)
{
keeperState = EnumUtil <Watcher.Event.KeeperState> .DefinedCast(eventMessage.getState());
eventType = EnumUtil <Watcher.Event.EventType> .DefinedCast(eventMessage.get_Type());
path = eventMessage.getPath();
}
public void testInvalidIntConversion()
{
try {
Watcher.Event.KeeperState ks = EnumUtil <Watcher.Event.KeeperState> .DefinedCast(324142);
Assert.fail("Was able to create an invalid KeeperState via an integer");
}
catch (Exception)
{
// we're good.
}
}
public static ConnectionState ToConnectionState(this Watcher.Event.KeeperState state)
{
switch (state)
{
case Watcher.Event.KeeperState.SyncConnected:
return(ConnectionState.Connected);
case Watcher.Event.KeeperState.ConnectedReadOnly:
return(ConnectionState.ConnectedReadonly);
case Watcher.Event.KeeperState.Expired:
return(ConnectionState.Expired);
default:
return(ConnectionState.Disconnected);
}
}
private bool WaitForKeeperState(Watcher.Event.KeeperState keeperState, TimeSpan timeOut)
{
_logHandler.Info($"Waiting for keeper state {Convert.ToString(keeperState)}");
bool stillWaiting = true;
while (_currentState != keeperState)
{
if (!stillWaiting)
{
return(false);
}
stillWaiting = _stateChangedCondition.WaitOne(timeOut);
}
_logHandler.Info($"State is {_currentState}");
return(true);
}
private void ProcessStateChanged(WatchedEvent @event)
{
this._currentState = @event.getState();
this.HandleStateChanged(this._currentState);
if (@event.getState() != Event.KeeperState.Expired)
{
return;
}
try
{
this.ReConnect(true);
}
catch (Exception e)
{
_logHandler.Error("Process state changed event error", e);
this.HandleEstablishmentError(e);
}
}
internal WatchedEvent(Watcher.Event.EventType eventType, Watcher.Event.KeeperState keeperState, string path)
{
this.keeperState = keeperState;
this.eventType = eventType;
this.path = path;
}
public void HandleStateChanged(Watcher.Event.KeeperState state)
{
Debug.WriteLine($"HandleStateChanged: {state.ToString()}");
}
public void HandleStateChanged(Watcher.Event.KeeperState state)
{
Logger.Info($"状态变更：{state.ToString()}");
}
