protected override void doSubscribe(ServiceMeta serviceMeta)
{
string directory = $"/meou/provider/{serviceMeta.getGroup()}/{serviceMeta.getName()}/{serviceMeta.getVersion()}";
IZKChildListener childListener = new ZKChildListener();
childListener.ChildChangeHandler = (parentPath, currentChilds) =>
{
var list = new List <RegisterMeta>(currentChilds.Count);
RegisterMeta temp = null;
foreach (var child in currentChilds)
{
temp = parseRegisterMeta($"{parentPath}/{child}");
list.Add(temp);
}
notify(serviceMeta, list);
return(Task.CompletedTask);
};
//childListener.ChildCountChangedHandler = async (parentPath, currentChilds) =>
//{
// await notify(serviceMeta, NotifyEvent.CHILD_ADDED, 1L, new List<RegisterMeta>());
//};
configClient.SubscribeChildChanges(directory, childListener);
}
public void SubscribeChildChanges()
{
using (ZKClient zkClient = ZKClientBuilder.NewZKClient(TestUtil.zkServers).Build())
{
IZKChildListener childListener = new ZKChildListener();
//子节点内容变化
childListener.ChildChangeHandler = async(parentPath, currentChilds) =>
{
await Task.Run(() =>
{
Console.WriteLine(parentPath);
Console.WriteLine(string.Join(".", currentChilds));
});
};
//子节点数量变化
childListener.ChildCountChangedHandler = async(parentPath, currentChilds) =>
{
await Task.Run(() =>
{
Console.WriteLine(parentPath);
Console.WriteLine(string.Join(".", currentChilds));
});
};
//"/testUserNode" 监听的节点，可以是现在存在的也可以是不存在的
zkClient.SubscribeChildChanges("/testUserNode3", childListener);
Thread.Sleep(TimeSpan.FromSeconds(60));
}
}
private ZKDistributedLock(ZKClient client, string lockPach)
{
this.client = client;
this.lockPath = lockPach;
IZKChildListener childListener = new ZKChildListener().ChildChange(
(parentPath, currentChilds) =>
{
if (Check(currentSeq, currentChilds))
{
semaphore.Release();
}
});
this.countListener = childListener;
}
public void SubscribeChildChanges()
{
ZKClient zkClient = ZKClientBuilder.NewZKClient(TestUtil.zkServers)
.SessionTimeout(10000)
.ConnectionTimeout(10000)
.Serializer(new SerializableSerializer())
.Build();
Console.WriteLine("conneted ok!");
IZKChildListener childListener = new ZKChildListener().ChildChange((parentPath, currentChilds) =>
{
Console.WriteLine(parentPath);
Console.WriteLine(string.Join(".", currentChilds));
});
//"/testUserNode" 监听的节点，可以是现在存在的也可以是不存在的
zkClient.SubscribeChildChanges("/testUserNode3", childListener);
Thread.Sleep(int.MaxValue);
zkClient.Close();
zkClient = null;
}
public void TestHandleChildChanges()
{
LOG.Info("--- testHandleChildChanges");
string path = "/a";
int count = 0;
Holder <List <string> > children = new Holder <List <string> >();
IZKChildListener listener = new ZKChildListener().ChildChange(
(parentPath, currentChilds) =>
{
Interlocked.Increment(ref count);
children.value = currentChilds;
});
_zkClient.SubscribeChildChanges(path, listener);
// ----
// Create the root node should throw the first child change event
// ----
_zkClient.CreatePersistent(path);
// wait some time to make sure the event was triggered
TestUtil.WaitUntil(1, () => { return(count); }, new TimeSpan(0, 0, 0, 5));
Assert.True(1 == count);
Assert.True(0 == children.value.Count);
// ----
// Creating a child node should throw another event
// ----
count = 0;
_zkClient.CreatePersistent(path + "/child1");
// wait some time to make sure the event was triggered
TestUtil.WaitUntil(1, () => { return(count); }, new TimeSpan(0, 0, 0, 5));
Assert.True(1 == count);
Assert.True(1 == children.value.Count);
Assert.True("child1" == children.value[0]);
// ----
// Creating another child and deleting the node should also throw an event
// ----
count = 0;
_zkClient.CreatePersistent(path + "/child2");
_zkClient.DeleteRecursive(path);
// wait some time to make sure the event was triggered
bool eventReceived = TestUtil.WaitUntil(true, () => { return(count > 0 && children.value == null); }, new TimeSpan(0, 0, 0, 5));
Assert.True(eventReceived);
Assert.Null(children.value);
// ----
// Creating root again should throw an event
// ----
count = 0;
_zkClient.CreatePersistent(path);
// wait some time to make sure the event was triggered
eventReceived = TestUtil.WaitUntil(true, () => { return(count > 0 && children.value != null); }, new TimeSpan(0, 0, 0, 5));
Assert.True(eventReceived);
Assert.True(0 == children.value.Count);
// ----
// Creating child now should throw an event
// ----
count = 0;
_zkClient.CreatePersistent(path + "/child");
// wait some time to make sure the event was triggered
eventReceived = TestUtil.WaitUntil(true, () => { return(count > 0); }, new TimeSpan(0, 0, 0, 5));
Assert.True(eventReceived);
Assert.True(1 == children.value.Count);
Assert.True("child" == children.value[0]);
// ----
// Deleting root node should throw an event
// ----
count = 0;
_zkClient.DeleteRecursive(path);
// wait some time to make sure the event was triggered
eventReceived = TestUtil.WaitUntil(true, () => { return(count > 0 && children.value == null); }, new TimeSpan(0, 0, 0, 5));
Assert.True(eventReceived);
Assert.Null(children.value);
}
