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();
}
