public void UnLock()
{
ZkLockerManager.GetClient().deleteAsync(_currentNode).Wait();
MessageManager <Null> .DeleteSubject(_currentNode);
_observer.OnCompleted();
_event.Dispose();
}
private async Task <bool> ExistPreNodeExecuted()
{
var result = await ZkLockerManager.GetClient().getChildrenAsync($"/locks/{_lockName}");
var children = result.Children.OrderBy(item => int.Parse(Regex.Replace(item, @"[a-zA-Z|_]", "0"))).ToList();
var currentIndex = children.IndexOf(_currentNode.Replace($"/locks/{_lockName}/", ""));
if (currentIndex <= 0)
{
return(false);
}
return(true);
}
public override async Task process(WatchedEvent @event)
{
if (@event.get_Type() == Event.EventType.NodeDeleted)
{
var result = await ZkLockerManager.GetClient()
.getChildrenAsync(@event.getPath().Substring(0, @event.getPath().LastIndexOf('/')));
var children = result.Children.OrderBy(item => int.Parse(Regex.Replace(item, @"[a-zA-Z|_]", "0"))).ToList();
if (children.Count > 0)
{
MessageManager <Null> .Publish(
@event.getPath().Substring(0, @event.getPath().LastIndexOf('/') + 1) + children[0], new Null());
}
}
}
public Locker(string lockName, int timeout)
{
if (ZkLockerManager.GetClient().existsAsync("/locks").Result == null)
{
ZkLockerManager.GetClient().createAsync("/locks", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT).Wait();
}
if (ZkLockerManager.GetClient().existsAsync("/locks/" + lockName).Result == null)
{
ZkLockerManager.GetClient().createAsync("/locks/" + lockName, new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT).Wait();
}
_lockName = lockName;
_lockTimeout = timeout;
_observer = Observer.Create <Null>(_ => { ReceiveMessage(); });
}
public void Lock()
{
_currentNode = ZkLockerManager.GetClient().createAsync($"/locks/{_lockName}/node", new byte[0],
ZooDefs.Ids.OPEN_ACL_UNSAFE,
CreateMode.EPHEMERAL_SEQUENTIAL).Result;
ZkLockerManager.GetClient().existsAsync(_currentNode, true);
if (ExistPreNodeExecuted().Result)
{
MessageManager <Null> .Subscribe(_currentNode, _observer);
var result = WaitHandle.WaitAny(new WaitHandle[] { _event }, TimeSpan.FromMilliseconds(_lockTimeout));
if (result == WaitHandle.WaitTimeout || result == 1)
{
UnLock();
throw new LockerTimeoutException();
}
}
}
