private async Task Watcher_OnChange(string path, Watcher.Event.KeeperState keeperState, Watcher.Event.EventType eventType)
{
switch (keeperState)
{
case Watcher.Event.KeeperState.Expired:
Logger.LogWarning($"ZooKeeper has been {keeperState},Reconnecting...");
ZooKeeperSessionId = 0;
CreateZooKeeperClient();
break;
case Watcher.Event.KeeperState.Disconnected:
Logger.LogWarning($"ZooKeeper has been {keeperState},Reconnecting...");
CreateZooKeeperClient();
break;
case Watcher.Event.KeeperState.SyncConnected:
if (ZooKeeperSessionId == 0)
{
ZooKeeperSessionId = ZooKeeper.getSessionId();
}
await SubscribeNodes(path, eventType);
break;
}
}
/// <summary>
/// 初始化连接
/// </summary>
public void InitClientConnection()
{
if (connectionString.IsNullOrEmpty())
{
return;
}
zkClient = new ZooKeeper(connectionString, zkTimeOut, watcher);
Thread.Sleep(zkTimeOut);
sessionId = zkClient.getSessionId();
}
/**
* Kill the given ZK session
*
* @param client the client to kill
* @param connectString server connection string
* @param maxMs max time ms to wait for kill
* @throws Exception errors
*/
public static void kill(ZooKeeper client, String connectString, int maxMs)
{
// long startTicks = DateTime.Now.Ticks / 1000;
// Barrier sessionLostLatch = new Barrier(2);
// Watcher sessionLostWatch = new BarrierWatcher(sessionLostLatch);
// client.existsAsync("/___CURATOR_KILL_SESSION___" + DateTime.Now.Ticks,
// sessionLostWatch)
// .Wait();
Barrier connectionLatch = new Barrier(2);
Watcher connectionWatcher = new SyncWatcher(connectionLatch);
ZooKeeper zk = new ZooKeeper(connectString,
maxMs,
connectionWatcher,
client.getSessionId(),
client.getSessionPasswd());
try
{
if (!connectionLatch.SignalAndWait(maxMs))
{
throw new Exception("KillSession could not establish duplicate session");
}
try
{
zk.closeAsync().Wait();
}
finally
{
zk = null;
}
// while ( client.getState() == ZooKeeper.States.CONNECTED
// && !sessionLostLatch.SignalAndWait(100) )
// {
// long elapsed = (DateTime.Now.Ticks / 1000) - startTicks;
// if ( elapsed > maxMs )
// {
// throw new Exception("KillSession timed out waiting for session to expire");
// }
// }
}
finally
{
zk?.closeAsync().Wait();
}
}
/**
* Kill the given ZK session
*
* @param client the client to kill
* @param connectString server connection string
* @param maxMs max time ms to wait for kill
* @throws Exception errors
*/
public static void kill(ZooKeeper client, String connectString, int maxMs)
{
// long startTicks = DateTime.Now.Ticks / 1000;
// Barrier sessionLostLatch = new Barrier(2);
// Watcher sessionLostWatch = new BarrierWatcher(sessionLostLatch);
// client.existsAsync("/___CURATOR_KILL_SESSION___" + DateTime.Now.Ticks,
// sessionLostWatch)
// .Wait();
Barrier connectionLatch = new Barrier(2);
Watcher connectionWatcher = new SyncWatcher(connectionLatch);
ZooKeeper zk = new ZooKeeper(connectString,
maxMs,
connectionWatcher,
client.getSessionId(),
client.getSessionPasswd());
try
{
if ( !connectionLatch.SignalAndWait(maxMs) )
{
throw new Exception("KillSession could not establish duplicate session");
}
try
{
zk.closeAsync().Wait();
}
finally
{
zk = null;
}
// while ( client.getState() == ZooKeeper.States.CONNECTED
// && !sessionLostLatch.SignalAndWait(100) )
// {
// long elapsed = (DateTime.Now.Ticks / 1000) - startTicks;
// if ( elapsed > maxMs )
// {
// throw new Exception("KillSession timed out waiting for session to expire");
// }
// }
}
finally
{
zk?.closeAsync().Wait();
}
}
private ZookeeperClient(string[] hosts, string[] ports)
{
if ((hosts.Length != ports.Length) || (hosts.Length <= 0 && ports.Length <= 0))
{
throw new ApplicationException("the length of hosts and ports must same and must bigger than 0");
}
connectionString = "";
for (var i = 0; i < hosts.Length; i++)
{
connectionString += hosts[i] + ":" + ports[i] + ",";
}
watcher = new ConnectionStatusWatcher(this);
connectionString = connectionString.Substring(0, connectionString.Length - 1);
zkClient = new ZooKeeper(connectionString, zkTimeOut, watcher);
// waiting for the connect finish
Thread.Sleep(zkTimeOut);
sessionId = zkClient.getSessionId();
}
public void testChild()
{
const string name = "/foo";
zk.create(name, name.getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
const string childname = name + "/bar";
zk.create(childname, childname.getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
var stat = newStat();
zk.getData(name, false, stat);
Assert.assertEquals(stat.getCzxid(), stat.getMzxid());
Assert.assertEquals(stat.getCzxid() + 1, stat.getPzxid());
Assert.assertEquals(stat.getCtime(), stat.getMtime());
Assert.assertEquals(1, stat.getCversion());
Assert.assertEquals(0, stat.getVersion());
Assert.assertEquals(0, stat.getAversion());
Assert.assertEquals(0, stat.getEphemeralOwner());
Assert.assertEquals(name.Length, stat.getDataLength());
Assert.assertEquals(1, stat.getNumChildren());
stat = newStat();
zk.getData(childname, false, stat);
Assert.assertEquals(stat.getCzxid(), stat.getMzxid());
Assert.assertEquals(stat.getCzxid(), stat.getPzxid());
Assert.assertEquals(stat.getCtime(), stat.getMtime());
Assert.assertEquals(0, stat.getCversion());
Assert.assertEquals(0, stat.getVersion());
Assert.assertEquals(0, stat.getAversion());
Assert.assertEquals(zk.getSessionId(), stat.getEphemeralOwner());
Assert.assertEquals(childname.Length, stat.getDataLength());
Assert.assertEquals(0, stat.getNumChildren());
}
public long GetSessionId()
{
ValidateState();
return(_zk.getSessionId());
}