public WatchLockModel WatchLock(string lockname, long timeout)
{
var Event = new System.Threading.ManualResetEvent(false);
//get id and confirm lock exists .
var node = _client.GetValAsync($"/locks/{lockname}").Result;
long Id = 0;
if (!long.TryParse(node, out Id))
{
return(new WatchLockModel()
{
Id = 0, Result = WatcherResult.NotExists
});
}
//at etcd use single watch on lock.
_client.Watch($"/locks/{lockname}", new Action <dotnet_etcd.WatchEvent[]>((e) => {
foreach (var item in e)
{
if (item.Type == Mvccpb.Event.Types.EventType.Delete && item.Key == $"/locks/{lockname}")
{
Event.Set();
}
}
}));
//timeout or unlock
var action = System.Threading.WaitHandle.WaitAny(new System.Threading.WaitHandle[] { Event }, TimeSpan.FromMilliseconds(timeout));
if (action == System.Threading.WaitHandle.WaitTimeout)
{
return(new WatchLockModel()
{
Id = Id, Result = WatcherResult.TimeOuit
});
}
else
{
return(new WatchLockModel()
{
Id = Id, Result = WatcherResult.UnLocked
});
}
}
