/// <summary>
/// 递归创建该节点下的所有子节点和该节点本身。
/// </summary>
/// <param name="client">ZooKeeper客户端。</param>
/// <param name="path">节点路径。</param>
/// <param name="getNodeData">获取当前被创建节点数据的委托。</param>
/// <param name="getNodeAcls">获取当前被创建节点权限的委托。</param>
public static async Task CreateRecursiveAsync(this ZookeeperClient client, string path, Func <string, byte[]> getNodeData, Func <string, List <ACL> > getNodeAcls)
{
var data = getNodeData(path);
var acls = getNodeAcls(path);
try
{
await client.CreateAsync(path, data, acls, CreateMode.PERSISTENT);
}
catch (KeeperException.NodeExistsException)
{
}
catch (KeeperException.NoNodeException)
{
var parentDir = path.Substring(0, path.LastIndexOf('/'));
await CreateRecursiveAsync(client, parentDir, getNodeData, getNodeAcls);
await client.CreateAsync(path, data, acls, CreateMode.PERSISTENT);
}
}
/// <summary>
/// 递归删除该节点下的所有子节点和该节点本身。
/// </summary>
/// <param name="client">ZooKeeper客户端。</param>
/// <param name="path">节点路径。</param>
/// <returns>如果成功则返回true，false。</returns>
public static async Task <bool> DeleteRecursiveAsync(this ZookeeperClient client, string path)
{
IEnumerable <string> children;
try
{
children = await client.GetChildrenAsync(path);
}
catch (KeeperException.NoNodeException)
{
return(true);
}
foreach (var subPath in children)
{
if (!await client.DeleteRecursiveAsync(path + "/" + subPath))
{
return(false);
}
}
await client.DeleteAsync(path);
return(true);
}
/// <summary>
/// 创建节点。
/// </summary>
/// <param name="client">ZooKeeper客户端。</param>
/// <param name="path">节点路径。</param>
/// <param name="data">节点数据。</param>
/// <param name="acls">权限。</param>
/// <param name="isSequential">是否按顺序创建。</param>
/// <returns>节点路径。</returns>
/// <remarks>
/// 因为使用序列方式创建节点zk会修改节点name，所以需要返回真正的节点路径。
/// </remarks>
public static Task <string> CreatePersistentAsync(this ZookeeperClient client, string path, byte[] data, List <ACL> acls, bool isSequential = false)
{
return(client.CreateAsync(path, data, acls, isSequential ? CreateMode.PERSISTENT_SEQUENTIAL : CreateMode.PERSISTENT));
}
/// <summary>
/// 创建节点。
/// </summary>
/// <param name="client">ZooKeeper客户端。</param>
/// <param name="path">节点路径。</param>
/// <param name="data">节点数据。</param>
/// <param name="isSequential">是否按顺序创建。</param>
/// <returns>节点路径。</returns>
/// <remarks>
/// 因为使用序列方式创建节点zk会修改节点name，所以需要返回真正的节点路径。
/// </remarks>
public static Task <string> CreatePersistentAsync(this ZookeeperClient client, string path, byte[] data, bool isSequential = false)
{
return(client.CreatePersistentAsync(path, data, ZooDefs.Ids.OPEN_ACL_UNSAFE, isSequential));
}
/// <summary>
/// 创建短暂的节点。
/// </summary>
/// <param name="client">ZooKeeper客户端。</param>
/// <param name="path">节点路径。</param>
/// <param name="data">节点数据。</param>
/// <param name="acls">权限。</param>
/// <param name="isSequential">是否按顺序创建。</param>
/// <returns>节点路径。</returns>
/// <remarks>
/// 因为使用序列方式创建节点zk会修改节点name，所以需要返回真正的节点路径。
/// </remarks>
public static Task <string> CreateEphemeralAsync(this ZookeeperClient client, string path, byte[] data, List <ACL> acls, bool isSequential = false)
{
return(client.CreateAsync(path, data, acls, isSequential ? CreateMode.EPHEMERAL_SEQUENTIAL : CreateMode.EPHEMERAL));
}
/// <summary>
/// 等待直到zk连接成功。
/// </summary>
/// <param name="client">zk客户端。</param>
/// <param name="timeout">最长等待时间。</param>
/// <returns>如果成功则返回true，否则返回false。</returns>
public static bool WaitUntilConnected(this ZookeeperClient client, TimeSpan timeout)
{
return(client.WaitForKeeperState(Watcher.Event.KeeperState.SyncConnected, timeout));
}
/// <summary>
/// 等待直到zk连接成功，超时时间为zk选项中的操作超时时间配置值。
/// </summary>
/// <param name="client">zk客户端。</param>
public static void WaitForRetry(this ZookeeperClient client)
{
client.WaitUntilConnected(TimeSpan.FromSeconds(client.Options.OperatingTimeoutSeconds));
}
/// <summary>
/// 递归创建该节点下的所有子节点和该节点本身。
/// </summary>
/// <param name="client">ZooKeeper客户端。</param>
/// <param name="path">节点路径。</param>
/// <param name="data">节点数据。</param>
/// <param name="acls">权限。</param>
public static Task CreateRecursiveAsync(this ZookeeperClient client, string path, byte[] data, List <ACL> acls)
{
return(client.CreateRecursiveAsync(path, p => data, p => acls));
}
/// <summary>
/// 递归创建该节点下的所有子节点和该节点本身。
/// </summary>
/// <param name="client">ZooKeeper客户端。</param>
/// <param name="path">节点路径。</param>
/// <param name="data">节点数据。</param>
public static Task CreateRecursiveAsync(this ZookeeperClient client, string path, byte[] data)
{
return(client.CreateRecursiveAsync(path, data, ZooDefs.Ids.OPEN_ACL_UNSAFE));
}
public NodeEntry(string path, ZookeeperClient client)
{
Path = path;
_client = client;
}
