/// <summary>Returns the list of subdirectories of directory at <paramref name="path"/>.</summary>
public static Task <List <string> > ListAsync([NotNull] this IFdbDirectory directory, [NotNull] IFdbReadOnlyRetryable db, [NotNull] IEnumerable <string> path, CancellationToken cancellationToken)
{
if (directory == null)
{
throw new ArgumentNullException("directory");
}
if (db == null)
{
throw new ArgumentNullException("db");
}
if (path == null)
{
throw new ArgumentNullException("path");
}
return(db.ReadAsync((tr) => directory.ListAsync(tr, path), cancellationToken));
}
/// <summary>List and open the sub-directories of the given directory</summary>
/// <param name="tr">Transaction used for the operation</param>
/// <param name="parent">Parent directory</param>
/// <returns>Dictionary of all the sub directories of the <paramref name="parent"/> directory.</returns>
public static async Task <Dictionary <string, FdbDirectorySubspace> > BrowseAsync(IFdbReadOnlyTransaction tr, IFdbDirectory parent)
{
Contract.NotNull(tr);
Contract.NotNull(parent);
// read the names of all the subdirectories
var children = await parent.ListAsync(tr).ConfigureAwait(false);
// open all the subdirectories
var folders = await children
.ToAsyncEnumerable()
.SelectAsync((child, _) => parent.OpenAsync(tr, FdbPath.Relative(child.Name)))
.ToListAsync();
// map the result
return(folders.ToDictionary(ds => ds.Name));
}
public static async Task <Dictionary <string, FdbDirectorySubspace> > BrowseAsync([NotNull] IFdbDatabase db, [NotNull] IFdbDirectory parent, CancellationToken ct)
{
Contract.NotNull(db, nameof(db));
Contract.NotNull(parent, nameof(parent));
return(await db.ReadAsync(async (tr) =>
{
// read the names of all the subdirectories
var names = await parent.ListAsync(tr).ConfigureAwait(false);
// open all the subdirectories
var folders = await names
.ToAsyncEnumerable()
.SelectAsync((name, _) => parent.OpenAsync(tr, name))
.ToListAsync(ct);
// map the result
return folders.ToDictionary(ds => ds.Name);
}, ct).ConfigureAwait(false));
}
/// <summary>Returns the list of all the top level directories of this database instance.</summary>
public Task <List <string> > ListAsync(CancellationToken cancellationToken)
{
return(m_database.ReadWriteAsync((tr) => m_directory.ListAsync(tr), cancellationToken));
}
/// <summary>Returns the list of subdirectories of the current directory.</summary>
public static Task <List <string> > ListAsync([NotNull] this IFdbDirectory directory, [NotNull] IFdbReadOnlyRetryable db, CancellationToken ct)
{
Contract.NotNull(directory, nameof(directory));
Contract.NotNull(db, nameof(db));
return(db.ReadAsync((tr) => directory.ListAsync(tr), ct));
}