public async Task testWatcherCorrectness()
{
ZooKeeper zk = null;
MyWatcher watcher = new MyWatcher();
zk = await createClient(watcher);
string[] names = new string[10];
for (int i = 0; i < names.Length; i++)
{
string name = await zk.createAsync("/tc-", "initialvalue".UTF8getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT_SEQUENTIAL);
names[i] = name;
Stat stat = (await zk.getDataAsync(name, watcher)).Stat;
await zk.setDataAsync(name, "new".UTF8getBytes(), stat.getVersion());
stat = await zk.existsAsync(name, watcher);
await zk.deleteAsync(name, stat.getVersion());
}
for (int i = 0; i < names.Length; i++)
{
string name = names[i];
WatchedEvent @event = watcher.events.poll(10 * 1000);
Assert.assertEquals(name, @event.getPath());
Assert.assertEquals(Watcher.Event.EventType.NodeDataChanged, @event.get_Type());
Assert.assertEquals(Watcher.Event.KeeperState.SyncConnected, @event.getState());
@event = watcher.events.poll(10 * 1000);
Assert.assertEquals(name, @event.getPath());
Assert.assertEquals(Watcher.Event.EventType.NodeDeleted, @event.get_Type());
Assert.assertEquals(Watcher.Event.KeeperState.SyncConnected, @event.getState());
}
}
public override Task process(WatchedEvent e)
{
var path = e.getPath();
var state = e.getState();
Console.WriteLine($"{Name} recieve: Path-{path} State-{e.getState()} Type-{e.get_Type()}");
return(Task.FromResult(0));
}
public override async Task process(WatchedEvent watchedEvent)
{
var event_type = watchedEvent.get_Type();
var zk_status = watchedEvent.getState();
var path = watchedEvent.getPath();
if (watchedEvent.getState() != Event.KeeperState.SyncConnected || watchedEvent.getPath() != Path)
{
$"{watchedEvent.ToJson()}".AddBusinessInfoLog();
return;
}
await ProcessImpl(watchedEvent);
/*
* switch (zk_status)
* {
* case Event.KeeperState.AuthFailed:
* Console.WriteLine(nameof(Event.KeeperState.AuthFailed));
* break;
* case Event.KeeperState.ConnectedReadOnly:
* Console.WriteLine(nameof(Event.KeeperState.ConnectedReadOnly));
* break;
* case Event.KeeperState.Disconnected:
* Console.WriteLine(nameof(Event.KeeperState.Disconnected));
* this.ReConnect();
* break;
* case Event.KeeperState.Expired:
* Console.WriteLine(nameof(Event.KeeperState.Expired));
* this.ReConnect();
* break;
* case Event.KeeperState.SyncConnected:
* break;
* default:
* break;
* }
*
* switch (event_type)
* {
* case Event.EventType.NodeChildrenChanged:
* //注册节点发生改变
* await this.NodeChildrenChanged(path);
* break;
* case Event.EventType.NodeCreated:
* break;
* case Event.EventType.NodeDataChanged:
* break;
* case Event.EventType.NodeDeleted:
* break;
* case Event.EventType.None:
* break;
* default:
* break;
* }
*/
}
public override Task process(WatchedEvent @event)
{
_logger.LogDebug("watch激发,回掉状态：{0}", @event.getState().ToString());
if (@event.getState() == KeeperState.SyncConnected ||
@event.getState() == KeeperState.ConnectedReadOnly)
{
_logger.LogDebug("释放阻塞");
_autoResetEvent.Set();
}
return(Task.FromResult(0));
}
public override Task process(WatchedEvent @event)
{
if (@event != null)
{
if (@event.getState() == Event.KeeperState.Disconnected || @event.getState() == Event.KeeperState.Expired)
{
return(new Task(() => zkClient.InitClientConnection()));
}
}
return(new Task(() => {
}));
}
public override async Task process(WatchedEvent watchedEvent)
{
Console.WriteLine("WatchedEvent:" + watchedEvent.getState().ToString() + ":" + watchedEvent.get_Type().ToString());
if (watchedEvent.getState() == KeeperState.Expired)
{
ThriftLog.Info("重新注册zk");
await _zk.closeAsync();
_zk = null;
Start();
}
return;
}
// very important that this method does not throw any exceptions as it is called from the zookeeper library
public override async Task process(WatchedEvent @event)
{
if (this.coordinatorToken.IsCancellationRequested || this.ignoreWatches)
return;
if (@event.getPath() != null)
this.logger.Info(this.clientId, $"Coordinator - KEEPER EVENT {@event.getState()} - {@event.get_Type()} - {@event.getPath()}");
else
this.logger.Info(this.clientId, $"Coordinator - KEEPER EVENT {@event.getState()} - {@event.get_Type()}");
switch (@event.getState())
{
case Event.KeeperState.Expired:
this.events.Add(CoordinatorEvent.SessionExpired);
break;
case Event.KeeperState.Disconnected:
if (!this.disconnectedTimer.IsRunning)
this.disconnectedTimer.Start();
break;
case Event.KeeperState.ConnectedReadOnly:
case Event.KeeperState.SyncConnected:
if (this.disconnectedTimer.IsRunning)
this.disconnectedTimer.Reset();
if (@event.getPath() != null)
{
if (@event.get_Type() == Event.EventType.NodeDataChanged)
{
if (@event.getPath().EndsWith("epoch"))
this.events.Add(CoordinatorEvent.NoLongerCoordinator);
}
else if (@event.get_Type() == Event.EventType.NodeChildrenChanged)
{
if (@event.getPath().EndsWith("resources"))
this.events.Add(CoordinatorEvent.RebalancingTriggered);
else if (@event.getPath().EndsWith("clients"))
this.events.Add(CoordinatorEvent.RebalancingTriggered);
}
}
break;
default:
this.logger.Error(this.clientId,
$"Coordinator - Currently this library does not support ZooKeeper state {@event.getState()}");
this.events.Add(CoordinatorEvent.PotentialInconsistentState);
break;
}
await Task.Yield();
}
public override Task process(WatchedEvent @event)
{
var state = @event.getState();
if (state == Event.KeeperState.SyncConnected)
{
if (_tcs.TrySetResult(default))
public async override Task process(WatchedEvent @event)
{
await base.process(@event);
if (@event.getState() == Event.KeeperState.SyncConnected)
{
if (latch != null)
{
latch.Set();
}
}
if (@event.get_Type() == Event.EventType.None)
{
return;
}
try
{
events.Add(@event);
}
catch (ThreadInterruptedException)
{
Assert.assertTrue("interruption unexpected", false);
}
}
public override async Task process(WatchedEvent @event)
{
if (@event.getState() == Event.KeeperState.SyncConnected)
{
this.connected = true;
}
if (@event.getState() == Event.KeeperState.Disconnected)
{
this.connected = false;
}
if (@event.getState() == Event.KeeperState.Expired)
{
this.connected = false;
}
await Task.FromResult(1);
}
public override Task process(WatchedEvent @event)
{
if (LOG_EVENTS)
{
log.Debug("ConnectState watcher: " + @event);
}
if (@event.get_Type() == Watcher.Event.EventType.None)
{
bool wasConnected = _isConnected.get();
bool newIsConnected = checkState(@event.getState(), wasConnected);
if (newIsConnected != wasConnected)
{
_isConnected.set(newIsConnected);
Volatile.Write(ref connectionStartMs, CurrentMillis);
}
}
foreach (Watcher parentWatcher in parentWatchers)
{
TimeTrace timeTrace = new TimeTrace("connection-state-parent-process", tracer.Get());
parentWatcher.process(@event);
timeTrace.commit();
}
return(Task.FromResult <object>(null));
}
public override Task process(WatchedEvent @event)
{
_state = @event.getState().ToString();
_type = @event.get_Type();
_path = @event.getPath();
switch (_type)
{
case Event.EventType.NodeCreated:
HandleCreate();
break;
case Event.EventType.NodeDeleted:
HandleDelete();
break;
case Event.EventType.NodeDataChanged:
HandleDataChange();
break;
case Event.EventType.NodeChildrenChanged:
HandleChildrenChange();
break;
default:
HandleNone();
break;
}
return(CompletedTask);
}
public ZookeeperEvent(WatchedEvent @event)
{
switch (@event.getState())
{
case Watcher.Event.KeeperState.AuthFailed: State = EventState.AuthFailed; break;
case Watcher.Event.KeeperState.ConnectedReadOnly: State = EventState.ConnectedReadOnly; break;
case Watcher.Event.KeeperState.Disconnected: State = EventState.Disconnected; break;
case Watcher.Event.KeeperState.Expired: State = EventState.Expired; break;
case Watcher.Event.KeeperState.SyncConnected: State = EventState.SyncConnected; break;
}
switch (@event.get_Type())
{
case Watcher.Event.EventType.NodeChildrenChanged: Type = EventType.NodeChildrenChanged; break;
case Watcher.Event.EventType.NodeCreated: Type = EventType.NodeCreated; break;
case Watcher.Event.EventType.NodeDataChanged: Type = EventType.NodeDataChanged; break;
case Watcher.Event.EventType.NodeDeleted: Type = EventType.NodeDeleted; break;
case Watcher.Event.EventType.None: Type = EventType.None; break;
}
Path = @event.getPath();
}
public override async Task process(WatchedEvent @event)
{
if (_isDisposed)
{
return;
}
var stateChanged = @event.getPath() == null;
var dataChanged = @event.get_Type() == Event.EventType.NodeChildrenChanged ||
@event.get_Type() == Event.EventType.NodeCreated ||
@event.get_Type() == Event.EventType.NodeDeleted ||
@event.get_Type() == Event.EventType.NodeDataChanged;
if (stateChanged)
{
await ProcessStateChange(@event);
}
else if (dataChanged)
{
await ProcessDataOrChildChange(@event);
}
else if (@event.getState() == Event.KeeperState.Expired)
{
// If the session expired we have to signal all conditions, because watches might have been removed and
// there is no guarantee that those
// We also have to notify all listeners that something might have changed
Logger.Info("session过期");
await FireAllEvents();
}
}
private Task OnStateChanged(WatchedEvent arg)
{
switch (arg.getState())
{
case Watcher.Event.KeeperState.Disconnected:
_connectedEvent.Reset();
break;
case Watcher.Event.KeeperState.SyncConnected:
_connectedEvent.Set();
return(LoadAsync());
case Watcher.Event.KeeperState.AuthFailed:
//todo:throw custom exception.
throw new Exception("connect to zookeeper auth failed");
case Watcher.Event.KeeperState.ConnectedReadOnly:
//we won't connect readonly when instantiate zookeeper.
break;
case Watcher.Event.KeeperState.Expired:
_connectedEvent.Reset();
_zooKeeper = _zooKeeperFactory.CreateZooKeeper(_option.ConnectionString, _option.SessionTimeout, out _watcher);
break;
default:
break;
}
return(Task.CompletedTask);
}
public override Task process(WatchedEvent @event)
{
_logger.LogInformation("watch激发,回掉状态：{0}", @event.getState().ToString());
if (@event.getState() == KeeperState.SyncConnected ||
@event.getState() == KeeperState.ConnectedReadOnly)
{
_logger.LogInformation("释放连接阻塞");
_autoResetEvent.Set();
}
else
{
_logger.LogInformation("连接断开，释放分布式锁阻塞");
_mutex.Set();
}
return(Task.FromResult(0));
}
public override async Task process(WatchedEvent @event)
{
switch (@event.get_Type())
{
case EventType.NodeDeleted:
//Node deleted, clear the leader so it'll recheck
_isLeader.Clear();
break;
case EventType.None:
switch (@event.getState())
{
case KeeperState.SyncConnected:
//When connected add the root node
await AddRootNode();
break;
case KeeperState.Disconnected:
//When disconnected, reconnect and recheck leader
_isLeader.Clear();
await Connect();
break;
}
break;
}
}
public override async Task process(WatchedEvent watchedEvent)
{
Console.WriteLine("WatchedEvent:" + watchedEvent.getState().ToString() + ":" + watchedEvent.get_Type().ToString());
if (watchedEvent.getState() == KeeperState.Expired)
{
ThriftLog.Info(" 重新连接zk");
await _zk.closeAsync();
_zk = null;
_serviceConfig = GetServiceConfig();
return;
}
try
{
if (watchedEvent.get_Type() == EventType.NodeChildrenChanged)
{
var data = await _zk.getChildrenAsync(_serviceConfig.ZookeeperConfig.NodeParent, this);
var children = data.Children;
if (children != null && children.Count > 0)
{
_serviceConfig.Host = string.Join(",", children);
}
else
{
_serviceConfig.Host = _defaultHost;
}
if (_updateHostDelegate != null)
{
_updateHostDelegate();
}
}
}
catch (Exception ex)
{
ThriftLog.Error(ex.Message + ex.StackTrace);
_zk = null;
_serviceConfig = GetServiceConfig();
ThriftLog.Info(" 重新连接zk2");
}
return;
}
public override Task process(WatchedEvent @event)
{
var state = @event.getState();
var type = @event.get_Type();
return(Task.CompletedTask);
// nada
}
public override Task process(WatchedEvent @event)
{
if (@event.getState() == Watcher.Event.KeeperState.SyncConnected)
{
Barrier.SignalAndWait(1);
}
return(Task.FromResult <object>(null));
}
public override async Task process(WatchedEvent watchedEvent)
{
if (watchedEvent.getState() != Event.KeeperState.SyncConnected || watchedEvent.getPath() != Path)
{
return;
}
await ProcessImpl(watchedEvent);
}
public override async Task process(WatchedEvent @event)
{
_logger.LogDebug($"{@event.getPath()}|{@event.get_Type()}|{@event.getState()}");
if (onWatch != null)
{
await onWatch(@event);
}
}
public override async Task process(WatchedEvent watchedEvent)
{
var status = watchedEvent.getState();
await this._status_changed.Invoke(status);
await Task.FromResult(1);
}
public override Task process(WatchedEvent @event)
{
if (@event.getState() == Event.KeeperState.Disconnected)
{
latch.TrySetResult(true);
}
return(CompletedTask);
}
public override Task process(WatchedEvent @event)
{
if (@event.getState() == Event.KeeperState.Expired)
{
Console.WriteLine("Session expired event received");
Barrier.SignalAndWait(0);
}
return(Task.FromResult <object>(null));
}
public override Task process(WatchedEvent @event)
{
if (@event.getState() == Event.KeeperState.Expired)
{
Console.WriteLine("Session expired event received");
Barrier.SignalAndWait(0);
}
return Task.FromResult<object>(null);
}
public override Task process(WatchedEvent @event)
{
Console.WriteLine($"[{DateTime.Now.ToString("HH:mm:ss")}] Status: {@event.getState()}, Type: {@event.get_Type()}, Path: {@event.getPath()}");
if (@event.getState() == Event.KeeperState.Expired)
{
if (_startTask?.IsCompleted == true)
{
_startTask = Start();
}
}
switch (@event.get_Type())
{
case Event.EventType.NodeChildrenChanged:
break;
}
return(Task.FromResult <object>(null));
}
public override async Task process(WatchedEvent @event)
{
var state = @event.getState();
var path = @event.getPath();
var type = @event.get_Type();
OnChange?.Invoke(path, state, type);
await Task.CompletedTask;
}
/// <summary>
/// 处理zk状态变更
/// </summary>
/// <param name="event"></param>
/// <returns></returns>
private async Task ProcessStateChange(WatchedEvent @event)
{
SetCurrentState(@event.getState());
//触发注册的StateChange事件
FireStateChangedEvent(@event.getState());
if (@event.getState() == Event.KeeperState.Expired)
{
Task.Run(async() => await Reconnect().ConfigureAwait(false))
.ConfigureAwait(false).GetAwaiter().GetResult();
FireNewSessionEvent();
}
_stateChangEvent.Set();
await Task.FromResult(0);
}
public override Task process(WatchedEvent @event)
{
if (@event.getState() == Event.KeeperState.SyncConnected)
{
SyncConnectedEvent?.Invoke();
}
return(Task.CompletedTask);
}
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);
}
}
public override Task process(WatchedEvent watchedEvent)
{
string unfixForNs = _curatorFrameworkImpl.unfixForNamespace(watchedEvent.getPath());
ICuratorEvent @event = new CuratorEventImpl(_curatorFrameworkImpl,
CuratorEventType.WATCHED,
(int) watchedEvent.getState(),
unfixForNs,
null,
null,
null,
null,
null,
watchedEvent,
null);
processEvent(@event);
return Task.FromResult<object>(null);
}
internal NamespaceWatchedEvent(CuratorFrameworkImpl client, WatchedEvent @event)
: base(@event.get_Type(), @event.getState(), client.unfixForNamespace(@event.getPath()))
{
}
public override Task process(WatchedEvent @event)
{
if (LOG_EVENTS)
{
log.Debug("ConnectState watcher: " + @event);
}
if ( @event.get_Type() == Watcher.Event.EventType.None )
{
bool wasConnected = _isConnected.get();
bool newIsConnected = checkState(@event.getState(), wasConnected);
if ( newIsConnected != wasConnected )
{
_isConnected.set(newIsConnected);
Volatile.Write(ref connectionStartMs, CurrentMillis);
}
}
foreach ( Watcher parentWatcher in parentWatchers )
{
TimeTrace timeTrace = new TimeTrace("connection-state-parent-process", tracer.Get());
parentWatcher.process(@event);
timeTrace.commit();
}
return Task.FromResult<object>(null);
}
public override Task process(WatchedEvent @event)
{
if (LOG_EVENTS)
{
log.debug("ConnectState watcher: " + @event);
}
if (@event.get_Type() == Event.EventType.None)
{
bool wasConnected = isConnected_Renamed.get();
var newIsConnected = checkState(@event.getState(), wasConnected);
if (newIsConnected != wasConnected)
{
isConnected_Renamed.set(newIsConnected);
connectionStartMs.Value = TimeHelper.ElapsedMiliseconds;
}
}
foreach (var parentWatcher in parentWatchers)
{
var timeTrace = new TimeTrace("connection-state-parent-process", tracer.get());
parentWatcher.process(@event);
timeTrace.commit();
}
}
public override Task process(WatchedEvent @event)
{
Console.WriteLine($"[{DateTime.Now.ToString("HH:mm:ss")}] Status: {@event.getState()}, Type: {@event.get_Type()}, Path: {@event.getPath()}");
if (@event.getState() == Event.KeeperState.Expired)
{
if (_startTask?.IsCompleted == true)
_startTask = Start();
}
switch (@event.get_Type())
{
case Event.EventType.NodeChildrenChanged:
break;
}
return Task.FromResult<object>(null);
}
/// <summary>Processes the specified event.</summary>
/// <param name="watchedEvent">The event.</param>
/// <returns></returns>
public override async Task process(WatchedEvent watchedEvent)
{
if (watchedEvent.getState() == Event.KeeperState.SyncConnected)
{
_connectioned();
}
else
{
_disconnect();
}
#if NET45||NET451
await Task.FromResult(1);
#else
await Task.CompletedTask;
#endif
}
public override async Task process(WatchedEvent watchedEvent)
{
if (watchedEvent.getState() != Event.KeeperState.SyncConnected || watchedEvent.getPath() != Path)
return;
await ProcessImpl(watchedEvent);
}
public override Task process(WatchedEvent @event)
{
if ( @event.getState() == Watcher.Event.KeeperState.SyncConnected )
{
Barrier.SignalAndWait(1);
}
return Task.FromResult<object>(null);
}