public async Task <TreeLock> AcquireAsync(CancellationToken cancellationToken, params string[] paths)
{
cancellationToken.ThrowIfCancellationRequested();
SnTrace.ContentOperation.Write("TreeLock: Acquiring lock for {0}", string.Join(", ", paths));
var lockTasks = paths.Select(p => _dataStore.AcquireTreeLockAsync(p, cancellationToken));
var lockIds = await Task.WhenAll(lockTasks).ConfigureAwait(false);
for (var i = 0; i < lockIds.Length; i++)
{
cancellationToken.ThrowIfCancellationRequested();
if (lockIds[i] == 0)
{
await _dataStore.ReleaseTreeLockAsync(lockIds, cancellationToken).ConfigureAwait(false);
var msg = "Cannot acquire a tree lock for " + paths[i];
SnTrace.ContentOperation.Write("TreeLock: " + msg);
throw new LockedTreeException(msg);
}
}
var logOp = SnTrace.ContentOperation.StartOperation("TreeLock: {0} for {1}", lockIds, paths);
return(new TreeLock(logOp, _dataStore, lockIds));
}
