public async Task EnusreInit()
{
if (_zk != null)
{
return;
}
await _semaphoreSlim.WaitAsync();
try
{
if (_zk == null)
{
var client = new ZookeeperClient(_sessionTimeout);
_watcher = new LeaderWatcher();
_zk = await client.CreateClient(_hostPort);
await EnsureExists(ROOT); //确保root已存在
await EnsureLocalNodeExists(); //确保创建当前节点
_watcher.NodeDeletedEvent += () =>
{
return(ElectionLeader());
};
}
}
finally
{
_semaphoreSlim.Release();
}
}
//static async Task Main(string[] args)
//{
// var services = new ServiceCollection()
// .AddLogging(builder => builder.AddConsole());
// var serviceProvider = services.BuildServiceProvider();
// var loggerFactory = serviceProvider.GetRequiredService<ILoggerFactory>();
// var leaderClient = new ZookeeperLeaderClient("192.168.70.131:2181", loggerFactory);
// var logger = loggerFactory.CreateLogger<Program>();
// leaderClient.ElectedLeaderEvent += () =>
// {
// logger.LogInformation("成功竞选成为leader");
// return Task.CompletedTask;
// };
// await leaderClient.ElectionLeader();
// Console.WriteLine("press any key to exists.");
// Console.Read();
// await leaderClient.Close();
//}
static async Task Main(string[] args)
{
string nodeIdentity = Guid.NewGuid().ToString();
Console.WriteLine($"当前节点：{nodeIdentity}");
var client = new ZookeeperClient();
var zk = await client.CreateClient("192.168.70.131:2181");
var electionSupport = new LeaderElectionSupport(zk, "/fairprice/leader", nodeIdentity);
int sleepDuration = 3000;
await electionSupport.start();
await Task.Delay(sleepDuration);
var leader = await electionSupport.getLeaderHostName();
LeaderElectionAwareImp watcher = null;
if (leader == nodeIdentity)
{
Console.WriteLine("当前节点成为leader");
}
else
{
watcher = new LeaderElectionAwareImp();
watcher.ElectionComplted += () =>
{
Console.WriteLine("ELECTED_COMPLETE，当前节点成为leader");
return(Task.CompletedTask);
};
electionSupport.addListener(watcher);
}
//Console.WriteLine("press any key to exists.");
Console.Read();
if (watcher != null)
{
electionSupport.removeListener(watcher);
}
await electionSupport.stop();
}
public ConfigServiceWatcher(ZookeeperClient cs)
{
_cs = cs;
}
static async Task Main(string[] args)
{
var conf = new ZookeeperClient("127.0.0.1:2181", 1000);
try
{
var sessionid = conf.ZK.getSessionId();
var sessionPassword = conf.ZK.getSessionPasswd();
Console.WriteLine(sessionid);
Console.WriteLine(Encoding.UTF8.GetString(sessionPassword));
Console.WriteLine("客户端开始连接zookeeper服务器...");
Console.WriteLine($"连接状态：{conf.ZK.getState()}");
Thread.Sleep(1000);//注意：为什么要加上这行代码，如果不加会出现什么问题
Console.WriteLine($"连接状态：{conf.ZK.getState()}");
Console.WriteLine("开始会话重连");
if (await conf.ZK.existsAsync(conf.QueryPath, false) == null)
{
conf.ConfigData = Encoding.Default.GetBytes("guozheng");
await conf.ZK.createAsync(conf.QueryPath, conf.ConfigData, Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
}
string configData = await conf.ReadConfigDataAsync();
Console.WriteLine("节点【{0}】目前的值为【{1}】。", conf.QueryPath, configData);
Console.ReadLine();
Random random = new Random((int)DateTime.Now.Ticks & 0x0000FFFF);
conf.ConfigData = Encoding.UTF8.GetBytes(string.Format("Mike_{0}", random.Next(100)));
await conf.ZK.setDataAsync(conf.QueryPath, conf.ConfigData, -1);
Console.WriteLine("节点【{0}】的值已被修改为【{1}】。", conf.QueryPath, Encoding.UTF8.GetString(conf.ConfigData));
Console.ReadLine();
if (await conf.ZK.existsAsync(conf.QueryPath, false) != null)
{
await conf.ZK.deleteAsync(conf.QueryPath, -1);
Console.WriteLine("已删除此【{0}】节点。{1}", conf.QueryPath, Environment.NewLine);
}
Console.WriteLine("测试完成");
Console.ReadKey();
}
catch (Exception ex)
{
if (conf.ZK == null)
{
Console.WriteLine("已关闭ZooKeeper的连接。");
Console.ReadLine();
return;
}
Console.WriteLine("抛出异常：{0}【{1}】。", Environment.NewLine, ex.ToString());
}
finally
{
await conf.Close();
Console.WriteLine("已关闭ZooKeeper的连接。");
Console.ReadLine();
}
}