/// <summary>Change the layer id of this directory</summary>
public static Task <FdbDirectorySubspace> ChangeLayerAsync([NotNull] this FdbDirectorySubspace subspace, [NotNull] IFdbRetryable db, Slice newLayer, CancellationToken ct)
{
Contract.NotNull(subspace, nameof(subspace));
Contract.NotNull(db, nameof(db));
return(db.ReadWriteAsync((tr) => subspace.ChangeLayerAsync(tr, newLayer), ct));
}
/// <summary>Returns the list of all the subdirectories of the current directory, it it exists.</summary>
public static Task <List <string> > TryListAsync([NotNull] this FdbDirectorySubspace subspace, [NotNull] IFdbReadOnlyRetryable db, CancellationToken ct)
{
Contract.NotNull(subspace, nameof(subspace));
Contract.NotNull(db, nameof(db));
return(db.ReadAsync((tr) => subspace.TryListAsync(tr), ct));
}
/// <summary>Attempts to move the current directory to <paramref name="newPath"/>.
/// There is no effect on the physical prefix of the given directory, or on clients that already have the directory open.
/// </summary>
public static Task <FdbDirectorySubspace> TryMoveToAsync([NotNull] this FdbDirectorySubspace subspace, [NotNull] IFdbRetryable db, FdbDirectoryPath newPath, CancellationToken ct)
{
Contract.NotNull(subspace, nameof(subspace));
Contract.NotNull(db, nameof(db));
return(db.ReadWriteAsync((tr) => subspace.TryMoveToAsync(tr, newPath), ct));
}
/// <summary>Checks if this directory exists</summary>
/// <returns>Returns true if the directory exists, otherwise false.</returns>
public static Task <bool> ExistsAsync([NotNull] this FdbDirectorySubspace subspace, [NotNull] IFdbReadOnlyRetryable db, CancellationToken ct)
{
if (subspace == null)
{
throw new ArgumentNullException(nameof(subspace));
}
if (db == null)
{
throw new ArgumentNullException(nameof(db));
}
return(db.ReadAsync((tr) => subspace.ExistsAsync(tr), ct));
}
/// <summary>Change the layer id of this directory</summary>
public static Task <FdbDirectorySubspace> ChangeLayerAsync([NotNull] this FdbDirectorySubspace subspace, [NotNull] IFdbRetryable db, Slice newLayer, CancellationToken ct)
{
if (subspace == null)
{
throw new ArgumentNullException(nameof(subspace));
}
if (db == null)
{
throw new ArgumentNullException(nameof(db));
}
return(db.ReadWriteAsync((tr) => subspace.ChangeLayerAsync(tr, newLayer), ct));
}
/// <summary>Returns the list of all the subdirectories of the current directory, it it exists.</summary>
public static Task <List <string> > TryListAsync([NotNull] this FdbDirectorySubspace subspace, [NotNull] IFdbReadOnlyRetryable db, CancellationToken cancellationToken)
{
if (subspace == null)
{
throw new ArgumentNullException("subspace");
}
if (db == null)
{
throw new ArgumentNullException("db");
}
return(db.ReadAsync((tr) => subspace.TryListAsync(tr), cancellationToken));
}
/// <summary>Attempts to move the current directory to <paramref name="newPath"/>.
/// There is no effect on the physical prefix of the given directory, or on clients that already have the directory open.
/// </summary>
public static Task <FdbDirectorySubspace> TryMoveToAsync([NotNull] this FdbDirectorySubspace subspace, [NotNull] IFdbRetryable db, [NotNull] IEnumerable <string> newPath, CancellationToken ct)
{
if (subspace == null)
{
throw new ArgumentNullException(nameof(subspace));
}
if (db == null)
{
throw new ArgumentNullException(nameof(db));
}
if (newPath == null)
{
throw new ArgumentNullException(nameof(newPath));
}
return(db.ReadWriteAsync((tr) => subspace.TryMoveToAsync(tr, newPath), ct));
}
private static async Task TreeDirectoryWalk(FdbDirectorySubspace folder, List<bool> last, IFdbDatabase db, TextWriter stream, CancellationToken ct)
{
ct.ThrowIfCancellationRequested();
var sb = new StringBuilder(last.Count * 4);
if (last.Count > 0)
{
for (int i = 0; i < last.Count - 1; i++) sb.Append(last[i] ? " " : "| ");
sb.Append(last[last.Count - 1] ? "`-- " : "|-- ");
}
IFdbDirectory node;
if (folder == null)
{
stream.WriteLine(sb.ToString() + "<root>");
node = db.Directory;
}
else
{
stream.WriteLine(sb.ToString() + (folder.Layer.ToString() == "partition" ? ("<" + folder.Name + ">") : folder.Name) + (folder.Layer.IsNullOrEmpty ? String.Empty : (" [" + folder.Layer.ToString() + "]")));
node = folder;
}
var children = await Fdb.Directory.BrowseAsync(db, node, ct);
int n = children.Count;
foreach (var child in children)
{
last.Add((n--) == 1);
await TreeDirectoryWalk(child.Value, last, db, stream, ct);
last.RemoveAt(last.Count - 1);
}
}
