/// <summary>
/// Start to request only once but response many (one by one)
/// </summary>
/// <param name="next"></param>
/// <returns></returns>
public async Task StartServerStreamingCall(ulong next)
{
_next = Math.Max(next, ToBeIndexedInfoQueue.Last()?.Height ?? -1 + 1);
try
{
var request = new RequestBlockInfo
{
ChainId = Hash.LoadHex(ChainConfig.Instance.ChainId),
NextHeight = ToBeIndexedInfoQueue.Count == 0 ? _next : ToBeIndexedInfoQueue.Last().Height + 1
};
using (var call = Call(request))
{
while (await call.ResponseStream.MoveNext())
{
var response = call.ResponseStream.Current;
// request failed or useless response
if (!response.Success || response.Height != _next)
{
continue;
}
if (ToBeIndexedInfoQueue.TryAdd(response.BlockInfoResult))
{
_next++;
}
}
}
}
catch (RpcException e)
{
_logger.Error(e);
throw;
}
}
/// <summary>
/// Task to create request in loop.
/// </summary>
/// <param name="call"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
private async Task RequestLoop(AsyncDuplexStreamingCall <RequestBlockInfo, TResponse> call,
CancellationToken cancellationToken)
{
while (!cancellationToken.IsCancellationRequested)
{
var request = new RequestBlockInfo
{
ChainId = Hash.LoadHex(ChainConfig.Instance.ChainId),
NextHeight = ToBeIndexedInfoQueue.Count == 0 ? _next : ToBeIndexedInfoQueue.Last().Height + 1
};
//_logger.Trace($"New request for height {request.NextHeight} to chain {_targetChainId.DumpHex()}");
await call.RequestStream.WriteAsync(request);
await Task.Delay(_realInterval);
}
}