public async Task Subscribe(CancellationToken cancel)
{
byte[] buffer = new byte[1024 * 1024];
ArraySegment <byte> segment = new ArraySegment <byte>(buffer);
ByteString currentRecord = await this.store.GetLastTransaction();
while (!cancel.IsCancellationRequested)
{
try
{
ClientWebSocket socket = new ClientWebSocket();
this.endpoint.Query = string.Format("from={0}", currentRecord.ToString());
logger.LogInformation("Connecting to {0}", this.endpoint.Uri);
await socket.ConnectAsync(this.endpoint.Uri, cancel);
while (true)
{
WebSocketReceiveResult result = await socket.ReceiveAsync(segment, cancel);
if (result.MessageType == WebSocketMessageType.Close)
{
break;
}
ByteString record = new ByteString(buffer.Take(result.Count));
await store.AddTransactions(new[] { record });
currentRecord = new ByteString(MessageSerializer.ComputeHash(record.ToByteArray()));
}
}
catch (Exception exception)
{
logger.LogError("Error in the stream subscriber: {0}", exception.ToString());
}
await Task.Delay(TimeSpan.FromMinutes(1));
}
}
public async Task Subscribe(CancellationToken cancel)
{
byte[] buffer = new byte[1024 * 1024];
ArraySegment <byte> segment = new ArraySegment <byte>(buffer);
IServiceScopeFactory scopeFactory = services.GetService <IServiceScopeFactory>();
ILogger logger = services.GetRequiredService <ILogger>();
while (!cancel.IsCancellationRequested)
{
try
{
using (IServiceScope scope = scopeFactory.CreateScope())
{
IStorageEngine storageEngine = scope.ServiceProvider.GetRequiredService <IStorageEngine>();
await storageEngine.Initialize();
ByteString currentRecord = await storageEngine.GetLastTransaction();
ClientWebSocket socket = new ClientWebSocket();
this.endpoint.Query = string.Format("from={0}", currentRecord.ToString());
logger.LogInformation("Connecting to {0}", this.endpoint.Uri);
await socket.ConnectAsync(this.endpoint.Uri, cancel);
while (true)
{
ByteString transaction;
using (MemoryStream stream = new MemoryStream(1024))
{
WebSocketReceiveResult result;
do
{
result = await socket.ReceiveAsync(segment, cancel);
if (result.MessageType == WebSocketMessageType.Close)
{
break;
}
stream.Write(segment.Array, segment.Offset, result.Count);
} while (!result.EndOfMessage);
stream.Seek(0, SeekOrigin.Begin);
using (BinaryReader reader = new BinaryReader(stream))
{
transaction = new ByteString(reader.ReadBytes((int)stream.Length));
}
}
await storageEngine.AddTransactions(new[] { transaction });
currentRecord = new ByteString(MessageSerializer.ComputeHash(transaction.ToByteArray()));
}
}
}
catch (Exception exception)
{
logger.LogError("Error in the stream subscriber: {0}", exception.ToString());
}
await Task.Delay(TimeSpan.FromMinutes(1));
}
}