private static async Task <ZResponse> _TryRegisterStreamAndWaitResponseAsync(ZRequest request, ZPacketsStreamCallback onPacketsReceivedCallback, ZStreamRejectedCallback streamRejectedCallback)
{
// create stream metadata to register it
var streamMetadata = new ZStreamMetadata(request.RequestCommand, onPacketsReceivedCallback, streamRejectedCallback);
// register stream to help find it and pass packets
_streamsPool.Add(streamMetadata);
// send open stream request
var openStreamResponse = await _RegisterRequestAndWaitResponseAsync(request);
// check response status code
if (openStreamResponse.StatusCode != ZResponseStatusCode.Ok)
{
_streamsPool.Remove(streamMetadata);
}
return(openStreamResponse);
}
public ZStreamMetadata(ZCommand streamCommand, ZPacketsStreamCallback packetsReceivedCallback, ZStreamRejectedCallback streamRejectedCallback)
{
StreamCommand = streamCommand;
OnPacketsReceivedCallback = packetsReceivedCallback;
StreamRejectedCallback = streamRejectedCallback;
}
/// <summary>
/// Sends request to ZClient to open packets streaming back as an asynchronous operation
/// </summary>
/// <param name="request">A request to open stream</param>
/// <param name="onPacketsReceivedCallback">An <see cref="ZPacketsStreamCallback"/> delegate that references the method to invoke when the stream packets received</param>
/// <param name="streamRejectedCallback">(Optional) An <see cref="ZStreamRejectedCallback"/> delegate that references the method to invoke when the stream was rejected</param>
/// <returns>The task object representing the asynchronous operation</returns>
public static async Task <ZResponse> OpenStreamAsync(ZRequest request, ZPacketsStreamCallback onPacketsReceivedCallback, ZStreamRejectedCallback streamRejectedCallback = null)
{
// check incoming arguments
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
if (onPacketsReceivedCallback == null)
{
throw new ArgumentNullException(nameof(onPacketsReceivedCallback));
}
// check is it already exists in pool
if (_streamsPool.Any(i => i.StreamCommand == request.RequestCommand))
{
throw new ArgumentException($"This stream request is already exists in streams pool. {request}");
}
// send request and get response
var response = await _TryRegisterStreamAndWaitResponseAsync(request, onPacketsReceivedCallback, streamRejectedCallback);
return(response);
}