| | | 1 | | using Microsoft.Extensions.Logging; |
| | | 2 | | |
| | | 3 | | namespace NLightning.Infrastructure.Protocol.Services; |
| | | 4 | | |
| | | 5 | | using Domain.Protocol.Interfaces; |
| | | 6 | | using Domain.Protocol.Messages; |
| | | 7 | | using Domain.Protocol.Payloads; |
| | | 8 | | using Domain.Serialization.Interfaces; |
| | | 9 | | using Domain.Transport; |
| | | 10 | | using Domain.Utils; |
| | | 11 | | using Exceptions; |
| | | 12 | | |
| | | 13 | | /// <summary> |
| | | 14 | | /// Service for sending and receiving messages. |
| | | 15 | | /// </summary> |
| | | 16 | | /// <remarks> |
| | | 17 | | /// This class is used to send and receive messages over a transport service. |
| | | 18 | | /// </remarks> |
| | | 19 | | /// <seealso cref="IMessageService" /> |
| | | 20 | | internal sealed class MessageService : IMessageService |
| | | 21 | | { |
| | | 22 | | private readonly ILogger<IMessageService> _logger; |
| | | 23 | | private readonly IMessageSerializer _messageSerializer; |
| | | 24 | | private readonly ITransportService? _transportService; |
| | | 25 | | |
| | | 26 | | private bool _disposed; |
| | | 27 | | |
| | | 28 | | /// <inheritdoc /> |
| | | 29 | | public event EventHandler<IMessage?>? OnMessageReceived; |
| | | 30 | | |
| | | 31 | | public event EventHandler<Exception>? OnExceptionRaised; |
| | | 32 | | |
| | | 33 | | /// <inheritdoc /> |
| | 4 | 34 | | public bool IsConnected => _transportService?.IsConnected ?? false; |
| | | 35 | | |
| | | 36 | | /// <summary> |
| | | 37 | | /// Initializes a new <see cref="MessageService"/> class. |
| | | 38 | | /// </summary> |
| | | 39 | | /// <param name="logger">The logger.</param> |
| | | 40 | | /// <param name="messageSerializer">The message serializer.</param> |
| | | 41 | | /// <param name="transportService">The transport service.</param> |
| | 20 | 42 | | public MessageService(ILogger<IMessageService> logger, IMessageSerializer messageSerializer, |
| | 20 | 43 | | ITransportService transportService) |
| | | 44 | | { |
| | 20 | 45 | | _logger = logger; |
| | 20 | 46 | | _messageSerializer = messageSerializer; |
| | 20 | 47 | | _transportService = transportService; |
| | | 48 | | |
| | 20 | 49 | | _transportService.MessageReceived += ReceiveMessage; |
| | 20 | 50 | | _transportService.ExceptionRaised += RaiseException; |
| | 20 | 51 | | } |
| | | 52 | | |
| | | 53 | | /// <inheritdoc /> |
| | | 54 | | /// <exception cref="ObjectDisposedException">Thrown when the object is disposed.</exception> |
| | | 55 | | public async Task SendMessageAsync(IMessage message, CancellationToken cancellationToken = default) |
| | | 56 | | { |
| | 8 | 57 | | ExceptionUtils.ThrowIfDisposed(_disposed, nameof(MessageService)); |
| | | 58 | | |
| | 4 | 59 | | if (cancellationToken.IsCancellationRequested) |
| | 0 | 60 | | return; |
| | | 61 | | |
| | 4 | 62 | | if (_transportService == null) |
| | 0 | 63 | | throw new InvalidOperationException($"{nameof(MessageService)} is not initialized"); |
| | | 64 | | |
| | 4 | 65 | | await _transportService.WriteMessageAsync(message, cancellationToken); |
| | 4 | 66 | | } |
| | | 67 | | |
| | | 68 | | private void ReceiveMessage(object? _, MemoryStream stream) |
| | | 69 | | { |
| | | 70 | | try |
| | | 71 | | { |
| | 4 | 72 | | var message = _messageSerializer.DeserializeMessageAsync(stream).GetAwaiter().GetResult(); |
| | 4 | 73 | | if (message is not null) |
| | | 74 | | { |
| | 4 | 75 | | OnMessageReceived?.Invoke(this, message); |
| | | 76 | | } |
| | 4 | 77 | | } |
| | 0 | 78 | | catch (MessageSerializationException mse) |
| | | 79 | | { |
| | 0 | 80 | | var message = mse.Message; |
| | 0 | 81 | | if (mse.InnerException is PayloadSerializationException pse) |
| | | 82 | | { |
| | 0 | 83 | | if (pse.InnerException is not null) |
| | 0 | 84 | | message = pse.InnerException.Message; |
| | | 85 | | else |
| | 0 | 86 | | message = pse.Message; |
| | | 87 | | } |
| | 0 | 88 | | else if (mse.InnerException is not null) |
| | | 89 | | { |
| | 0 | 90 | | message = mse.InnerException.Message; |
| | | 91 | | } |
| | | 92 | | |
| | 0 | 93 | | _logger.LogError(mse, "Failed to deserialize message: {Message}", message); |
| | 0 | 94 | | SendMessageAsync(new ErrorMessage(new ErrorPayload(message))).GetAwaiter().GetResult(); |
| | 0 | 95 | | RaiseException(this, mse); |
| | 0 | 96 | | } |
| | 0 | 97 | | catch (Exception e) |
| | | 98 | | { |
| | 0 | 99 | | _logger.LogError(e, "Failed to receive message"); |
| | 0 | 100 | | RaiseException(this, e); |
| | 0 | 101 | | } |
| | 4 | 102 | | } |
| | | 103 | | |
| | | 104 | | private void RaiseException(object? sender, Exception e) |
| | | 105 | | { |
| | 0 | 106 | | OnExceptionRaised?.Invoke(sender, e); |
| | 0 | 107 | | } |
| | | 108 | | |
| | | 109 | | #region Dispose Pattern |
| | | 110 | | |
| | | 111 | | /// <inheritdoc /> |
| | | 112 | | /// <remarks> |
| | | 113 | | /// Disposes the TransportService. |
| | | 114 | | /// </remarks> |
| | | 115 | | public void Dispose() |
| | | 116 | | { |
| | 8 | 117 | | Dispose(true); |
| | 8 | 118 | | GC.SuppressFinalize(this); |
| | 8 | 119 | | } |
| | | 120 | | |
| | | 121 | | private void Dispose(bool disposing) |
| | | 122 | | { |
| | 8 | 123 | | if (_disposed) |
| | 0 | 124 | | return; |
| | | 125 | | |
| | 8 | 126 | | if (disposing) |
| | | 127 | | { |
| | 8 | 128 | | _transportService?.Dispose(); |
| | | 129 | | } |
| | | 130 | | |
| | 8 | 131 | | _disposed = true; |
| | 8 | 132 | | } |
| | | 133 | | |
| | | 134 | | ~MessageService() |
| | | 135 | | { |
| | 0 | 136 | | Dispose(false); |
| | 0 | 137 | | } |
| | | 138 | | |
| | | 139 | | #endregion |
| | | 140 | | } |