public async Task <bool> ExistsAsync(string id, CancellationToken token = default)
{
using (AsyncTaskHolder())
{
if (id == null)
{
throw new ArgumentNullException(nameof(id));
}
if (_knownMissingIds.Contains(id))
{
return(false);
}
if (DocumentsById.TryGetValue(id, out _))
{
return(true);
}
var command = new HeadDocumentCommand(id, null);
await RequestExecutor.ExecuteAsync(command, Context, sessionInfo : _sessionInfo, token : token).ConfigureAwait(false);
return(command.Result != null);
}
}
public async Task <string> HeadAsync(string id)
{
if (id == null)
{
throw new ArgumentNullException(nameof(id));
}
var command = new HeadDocumentCommand(id, null);
await RequestExecutor.ExecuteAsync(command, Context);
return(command.Result);
}
public async Task <bool> ExistsAsync(string id)
{
if (id == null)
{
throw new ArgumentNullException(nameof(id));
}
if (DocumentsById.TryGetValue(id, out _))
{
return(true);
}
var command = new HeadDocumentCommand(id, null);
await RequestExecutor.ExecuteAsync(command, Context, sessionInfo : SessionInfo).ConfigureAwait(false);
return(command.Result != null);
}
/// <summary>
/// Check if document exists without loading it
/// </summary>
/// <param name="id">Document id.</param>
/// <returns></returns>
public bool Exists(string id)
{
if (id == null)
{
throw new ArgumentNullException(nameof(id));
}
if (DocumentsById.TryGetValue(id, out _))
{
return(true);
}
var command = new HeadDocumentCommand(id, null);
RequestExecutor.Execute(command, Context, sessionInfo: SessionInfo);
return(command.Result != null);
}
