/// <summary>
/// Appends stream to storage file, respecting previous append requests
/// </summary>
/// <param name="data">stream to be written to the file</param>
/// <param name="key">search key</param>
/// <param name="info">stream info related to stream being appended</param>
/// <param name="token">cancellation token for asynchronous operation</param>
/// <returns>Task object that will be completed once stream data is written</returns>
public void Write(Stream data, string key, StreamInfo info, CancellationToken token)
{
if (binaryStorageIndex.Contains(key))
{
throw new ArgumentException(nameof(key));
}
var newInfo = PreValidateStream(data, info);
var linkedTokenSource = CancellationTokenSource.CreateLinkedTokenSource(token, cancellationOnDispose.Token);
linkedTokenSource.Token.ThrowIfCancellationRequested();
if (!linkedTokenSource.IsCancellationRequested)
{
ManualResetEvent result = null;
lock (writeLock)
{
if (!linkedTokenSource.IsCancellationRequested)
{
result = InternalWrite(data, key, newInfo, linkedTokenSource.Token);
}
}
if (!linkedTokenSource.IsCancellationRequested)
{
result?.WaitOne();
}
}
}
/// <summary>
/// Check if key is present in the storage
/// </summary>
/// <param name="key">Unique identifier of the stream</param>
/// <returns>true if key is present and false otherwise</returns>
public bool Contains(string key)
{
return binaryStorageIndex.Contains(key);
}