/// <summary>
/// Create an persistent node with the given path and data. Create parents if necessary.
/// </summary>
public static void CreatePersistentPath(ZkClient client, string path, string data)
{
try
{
client.CreatePersistent(path, data);
}
catch (ZkNoNodeException e)
{
CreateParentPath(client, path);
client.CreatePersistent(path, data);
}
}
/// <summary>
/// make sure a persistent path exists in ZK. Create the path if not exist.
/// </summary>
/// <param name="client"></param>
/// <param name="path"></param>
public static void MakeSurePersistentPathExists(ZkClient client, string path)
{
if (!client.Exists(path))
{
client.CreatePersistent(path, true); // won't throw NoNodeException or NodeExistsException
}
}
/// <summary>
/// create the parent path
/// </summary>
/// <param name="client"></param>
/// <param name="path"></param>
private static void CreateParentPath(ZkClient client, string path)
{
var parentDir = path.Substring(0, path.LastIndexOf('/'));
if (parentDir.Length != 0)
{
client.CreatePersistent(parentDir, true);
}
}
public void Init()
{
var zkOptions = new ZkOptions
{
ZkServers = "114.215.169.82:12181",
SessionTimeout = 1000 * 100,
ConnectionTimeout = 1000 * 5,
OprationRetryTimeout = 1000 * 100
};
_zkClient = new ZkClient(zkOptions);
_zkClient.SubscribeStateChange(new ZkStateListener());
_zkClient.SubscribeChildChange("/data", new ZkChildListener());
_zkClient.SubscribeDataChange("/data", new ZkDataListener());
_zkClient.CreatePersistent("/data").GetAwaiter().GetResult();
}
/// <summary>
/// Update the value of a persistent node with the given path and data.
/// create parrent directory if necessary. Never throw NodeExistException.
/// Return the updated path zkVersion
/// </summary>
/// <param name="client"></param>
/// <param name="path"></param>
/// <param name="data"></param>
public static void UpdatePersistentPath(ZkClient client, string path, string data)
{
try
{
client.WriteData(path, data);
}
catch (ZkNoNodeException)
{
CreateParentPath(client, path);
try
{
client.CreatePersistent(path, data);
}
catch (ZkNodeExistsException)
{
client.WriteData(path, data);
}
}
}
/// <summary>
/// Update the value of a persistent node with the given path and data.
/// create parrent directory if necessary. Never throw NodeExistException.
/// Return the updated path zkVersion
/// </summary>
/// <param name="client"></param>
/// <param name="path"></param>
/// <param name="data"></param>
public static void UpdatePersistentPath(ZkClient client, string path, string data)
{
try
{
client.WriteData(path, data);
}
catch (ZkNoNodeException)
{
CreateParentPath(client, path);
try
{
client.CreatePersistent(path, data);
}
catch (ZkNodeExistsException)
{
client.WriteData(path, data);
}
}
}
/// <summary>
/// Create an persistent node with the given path and data. Create parents if necessary.
/// </summary>
public static void CreatePersistentPath(ZkClient client, string path, string data)
{
try
{
client.CreatePersistent(path, data);
}
catch (ZkNoNodeException e)
{
CreateParentPath(client, path);
client.CreatePersistent(path, data);
}
}
/// <summary>
/// create the parent path
/// </summary>
/// <param name="client"></param>
/// <param name="path"></param>
private static void CreateParentPath(ZkClient client, string path)
{
var parentDir = path.Substring(0, path.LastIndexOf('/'));
if (parentDir.Length != 0)
{
client.CreatePersistent(parentDir, true);
}
}
/// <summary>
/// make sure a persistent path exists in ZK. Create the path if not exist.
/// </summary>
/// <param name="client"></param>
/// <param name="path"></param>
public static void MakeSurePersistentPathExists(ZkClient client, string path)
{
if (!client.Exists(path))
{
client.CreatePersistent(path, true); // won't throw NoNodeException or NodeExistsException
}
}
