public void TestDataChanges1()
{
LOG.Info("--- testDataChanges1");
string path = "/a";
Holder <string> holder = new Holder <string>();
IZKDataListener listener = new ZKDataListener()
.DataCreatedOrChange((dataPath, data) =>
{
holder.value = Convert.ToString(data);
})
.DataDeleted((dataPath) =>
{
holder.value = null;
});
_zkClient.SubscribeDataChanges(path, listener);
_zkClient.CreatePersistent(path, "aaa");
// wait some time to make sure the event was triggered
string contentFromHolder = TestUtil.WaitUntil("b", () => { return(holder.value); }, new TimeSpan(0, 0, 0, 5));
Assert.True("aaa" == contentFromHolder);
}
public void TestDataChanges2()
{
LOG.Info("--- testDataChanges2");
string path = "/a";
int countChanged = 0;
int countDeleted = 0;
IZKDataListener listener = new ZKDataListener()
.DataCreatedOrChange((dataPath, data) =>
{
Interlocked.Increment(ref countChanged);
})
.DataDeleted((dataPath) =>
{
Interlocked.Decrement(ref countDeleted);
});
_zkClient.SubscribeDataChanges(path, listener);
// create node
_zkClient.CreatePersistent(path, "aaa");
// wait some time to make sure the event was triggered
TestUtil.WaitUntil(1, () => { return(countChanged); }, new TimeSpan(0, 0, 0, 5));
Assert.True(1 == countChanged);
Assert.True(0 == countDeleted);
countChanged = 0;
countDeleted = 0;
// delete node, this should trigger a delete event
_zkClient.Delete(path);
// wait some time to make sure the event was triggered
TestUtil.WaitUntil(1, () => { return(countDeleted); }, new TimeSpan(0, 0, 0, 5));
Assert.True(0 == countChanged);
Assert.True(1 == countDeleted);
// test if watch was reinstalled after the file got deleted
countChanged = 0;
_zkClient.CreatePersistent(path, "aaa");
// wait some time to make sure the event was triggered
TestUtil.WaitUntil(1, () => { return(countChanged); }, new TimeSpan(0, 0, 0, 5));
Assert.True(1 == countChanged);
// test if changing the contents notifies the listener
_zkClient.WriteData(path, "bbb");
// wait some time to make sure the event was triggered
TestUtil.WaitUntil(2, () => { return(countChanged); }, new TimeSpan(0, 0, 0, 5));
Assert.True(2 == countChanged);
}
public static void Init(params string[] appIds)
{
SyncVersion(appIds); //先同步获取一次，保证global之后执行的代码的都能获取到配置
if (zkClient != null) //如果zookeeper可用，则注册zookeeper
{
ZKDataListener zkDataListener = new ZKDataListener()
.DataChange((dataPath, data) =>
{
SyncVersion((dataPath.Split('/'))[2]);
});
foreach (var appId in appIds)
{
zkClient.SubscribeDataChanges("/ConfigCenter/" + appId, zkDataListener);
}
}
//_task = new Task(SyncVersion, appId, 20000, 10000); //如果zookeeper不可用，同时为了保证在zookeeper挂掉后，有补偿措施，启动一个定时获取的任务。
}
public void SubscribeDataChanges()
{
using (ZKClient zkClient = ZKClientBuilder.NewZKClient(TestUtil.zkServers).Build())
{
IZKDataListener dataListener = new ZKDataListener();
// 节点创建和节点内容变化
dataListener.DataCreatedOrChangeHandler = async(dataPath, data) =>
{
await Task.Run(() =>
{
Console.WriteLine(dataPath + ":" + Convert.ToString(data));
});
};
// 节点删除
dataListener.DataDeletedHandler = async(dataPath) =>
{
await Task.Run(() =>
{
Console.WriteLine(dataPath);
});
};
// 节点创建
dataListener.DataCreatedHandler = async(dataPath, data) =>
{
await Task.Run(() =>
{
Console.WriteLine(dataPath + ":" + Convert.ToString(data));
});
};
// 节点内容变化
dataListener.DataChangeHandler = async(dataPath, data) =>
{
await Task.Run(() =>
{
Console.WriteLine(dataPath);
});
};
zkClient.SubscribeDataChanges("/testUserNode", dataListener);
Thread.Sleep(TimeSpan.FromSeconds(60));
}
}
public void SubscribeDataChanges()
{
ZKClient zkClient = ZKClientBuilder.NewZKClient(TestUtil.zkServers)
.SessionTimeout(10000)
.ConnectionTimeout(10000)
.Serializer(new SerializableSerializer())
.Build();
Console.WriteLine("conneted ok!");
IZKDataListener dataListener = new ZKDataListener()
.DataCreatedOrChange((dataPath, data) =>
{
Console.WriteLine(dataPath + ":" + Convert.ToString(data));
})
.DataDeleted((dataPath) =>
{
Console.WriteLine(dataPath);
});
zkClient.SubscribeDataChanges("/testUserNode", dataListener);
Thread.Sleep(int.MaxValue);
zkClient.Close();
zkClient = null;
}