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);
}
/// <summary>
/// Initializes a new instance.
/// </summary>
/// <param name="option">the zookeeper option.</param>
/// <param name="zookeeperFactory">the zookeeper factory.</param>
public ZookeeperConfigurationProvider(ZookeeperOption option, IZooKeeperFactory zookeeperFactory)
{
_option = option;
_zooKeeperFactory = zookeeperFactory;
_zooKeeper = _zooKeeperFactory.CreateZooKeeper(_option.ConnectionString, _option.SessionTimeout, out _watcher);
_watcher.StateChanged += OnStateChanged;
_watcher.NodeChanged += OnNodeChanged;
_connectedEvent = new ManualResetEvent(false);
}
private async Task OnStateChanged(WatchedEvent arg)
{
switch (arg.getState())
{
case Watcher.Event.KeeperState.Disconnected:
_connectedEvent.Reset();
break;
case Watcher.Event.KeeperState.SyncConnected:
_connectedEvent.Set();
try
{
await LoadAsync();
}
catch (Exception ex)
{
HandleException(ex);
}
finally
{
_loadCompletedEvent.Set();
}
break;
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();
_loadCompletedEvent.Set();
_zooKeeper = _zooKeeperFactory.CreateZooKeeper(_option.ConnectionString, _option.SessionTimeout, _option.AuthInfo, out _watcher);
_watcher.StateChanged += OnStateChanged;
_watcher.NodeChanged += OnNodeChanged;
break;
default:
break;
}
}