private void FindPrefixInChildren(String prefix, IZooKeeper zookeeper, String dir)
{
var names = Zookeeper.GetChildren(dir, false);
foreach (string name in names)
{
if (name.StartsWith(prefix))
{
id = name;
if (LOG.IsDebugEnabled)
{
LOG.DebugFormat("Found id created last time: {0}", id);
}
break;
}
}
if (id == null)
{
id = zookeeper.Create(dir.Combine(prefix), data, Acl, CreateMode.EphemeralSequential);
if (LOG.IsDebugEnabled)
{
LOG.DebugFormat("Created id: {0}", id);
}
}
}
/**
* Make sure all the nodes in the path are created. NOTE: Unlike File.mkdirs(), Zookeeper doesn't distinguish
* between directories and files. So, every node in the path is created. The data for each node is an empty blob
*
* @param zookeeper the client
* @param path path to ensure
* @param makeLastNode if true, all nodes are created. If false, only the parent nodes are created
* @throws InterruptedException thread interruption
* @throws org.apache.zookeeper.KeeperException
* Zookeeper errors
*/
public static void Mkdirs(IZooKeeper zookeeper, String path, bool makeLastNode)
{
PathUtils.ValidatePath(path);
var pos = 1; // skip first slash, root is guaranteed to exist
do
{
pos = path.IndexOf(PathUtils.PathSeparatorChar, pos + 1);
if (pos == -1)
{
if (makeLastNode)
{
pos = path.Length;
}
else
{
break;
}
}
var subPath = path.Substring(0, pos);
if (zookeeper.Exists(subPath, false) == null)
{
try
{
zookeeper.Create(subPath, new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.Persistent);
}
catch (KeeperException.NodeExistsException e)
{
// ignore... someone else has created it since we checked
}
}
}while (pos < path.Length);
}
/**
* Make sure all the nodes in the path are created. NOTE: Unlike File.mkdirs(), Zookeeper doesn't distinguish
* between directories and files. So, every node in the path is created. The data for each node is an empty blob
*
* @param zookeeper the client
* @param path path to ensure
* @param makeLastNode if true, all nodes are created. If false, only the parent nodes are created
* @throws InterruptedException thread interruption
* @throws org.apache.zookeeper.KeeperException
* Zookeeper errors
*/
public static void Mkdirs(IZooKeeper zookeeper, String path, bool makeLastNode)
{
PathUtils.ValidatePath(path);
var pos = 1; // skip first slash, root is guaranteed to exist
do
{
pos = path.IndexOf(PathUtils.PathSeparatorChar, pos + 1);
if (pos == -1)
{
if (makeLastNode)
{
pos = path.Length;
}
else
{
break;
}
}
var subPath = path.Substring(0, pos);
if (zookeeper.Exists(subPath, false) == null)
{
try
{
zookeeper.Create(subPath, new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.Persistent);
}
catch (KeeperException.NodeExistsException e)
{
// ignore... someone else has created it since we checked
}
}
}
while (pos < path.Length);
}
