/// <summary>
/// 初始化
/// </summary>
public async Task Init()
{
try
{
//清理无用节点
await this.RetryAsync().ExecuteAsync(async() =>
await this.ClearDeadNodes());
}
catch (Exception e)
{
var err = new Exception("清理无用节点失败", e);
err.AddErrorLog();
}
try
{
//读取节点并添加监视
await this.RetryAsync().ExecuteAsync(async() =>
await this.WalkNodeAndWatch(this._base_path));
}
catch (Exception e)
{
var err = new Exception("订阅服务节点失败", e);
err.AddErrorLog();
}
//订阅完成
if (this.OnSubscribeFinishedAsync != null)
{
await this.OnSubscribeFinishedAsync.Invoke();
}
//订阅完成
this._client_ready.Set();
}
public async Task Reg()
{
try
{
await this.RetryAsync(async() => await this.RegisterService());
}
catch (Exception e)
{
var err = new Exception("注册服务失败", e);
err.AddErrorLog();
}
}
protected async Task InitBasePath()
{
try
{
var client = this.GetClientManager();
await this.RetryAsync().ExecuteAsync(async() => await client.EnsurePath(this._base_path));
}
catch (Exception e)
{
var err = new Exception("尝试创建服务注册base path失败", e);
err.AddErrorLog();
}
}
public ZooKeeperClient(string host, TimeSpan?timeout = null)
{
this._host = host ?? throw new ArgumentNullException(nameof(host));
this._timeout = timeout ?? TimeSpan.FromSeconds(30);
//监控zk的状态
this._connection_status_watcher = new ConnectionStatusWatcher(async status =>
{
this._client_lock.Reset();
switch (status)
{
case Watcher.Event.KeeperState.SyncConnected:
case Watcher.Event.KeeperState.ConnectedReadOnly:
//服务可用
this._client_lock.Set();
if (this.OnConnectedAsync != null)
{
await this.OnConnectedAsync.Invoke();
}
break;
case Watcher.Event.KeeperState.Disconnected:
//链接丢失，等待再次连接
if (this.OnUnConnectedAsync != null)
{
await this.OnUnConnectedAsync.Invoke();
}
break;
case Watcher.Event.KeeperState.Expired:
//session过期，重新创建客户端
if (this.OnSessionExpiredAsync != null)
{
await this.OnSessionExpiredAsync.Invoke();
}
break;
case Watcher.Event.KeeperState.AuthFailed:
//验证错误没必要再试尝试
this.Dispose();
var e = new Exception("zk auth验证失败，已经销毁所有链接");
e.AddErrorLog();
throw e;
}
});
//这里注释掉，让用户手动调用
//this.CreateClient();
}