C# TransportMessage类代码示例

        TransportMessage MapToTransportMessage(TimeoutData timeoutData)
        {
            var transportMessage = new TransportMessage
                                       {
                                           ReplyToAddress = Address.Local,
                                           Headers = new Dictionary<string, string>(),
                                           Recoverable = true,
                                           MessageIntent = MessageIntentEnum.Send,
                                           CorrelationId = timeoutData.CorrelationId,
                                           Body = timeoutData.State
                                       };

            if (timeoutData.Headers != null)
            {
                transportMessage.Headers = timeoutData.Headers;
            }
            else
            {
                //we do this to be backwards compatible, this can be removed when going to 3.1.X
                transportMessage.Headers[Headers.Expire] = timeoutData.Time.ToWireFormattedString();

                if (timeoutData.SagaId != Guid.Empty)
                    transportMessage.Headers[Headers.SagaId] = timeoutData.SagaId.ToString();

            }

            return transportMessage;
        }

        string GetRemoteAddress(TransportMessage msg)
        {
            if (msg.Headers.ContainsKey(Headers.HttpTo))
                return msg.Headers[Headers.HttpTo];

            return remoteUrl;
        }

 void IMutateOutgoingTransportMessages.MutateOutgoing(IMessage[] messages, TransportMessage transportMessage)
 {
     if (messageHeaders != null)
         if (messageHeaders.ContainsKey(messages[0]))
             foreach (var key in messageHeaders[messages[0]].Keys)
                 transportMessage.Headers.Add(key, messageHeaders[messages[0]][key]);
 }

        /// <summary>
        ///     Converts a TransportMessage to an Msmq message.
        ///     Doesn't set the ResponseQueue of the result.
        /// </summary>
        public static Message Convert(TransportMessage message)
        {
            var result = new Message();

            if (message.Body != null)
            {
                result.BodyStream = new MemoryStream(message.Body);
            }

            AssignMsmqNativeCorrelationId(message, result);

            result.Recoverable = message.Recoverable;

            if (message.TimeToBeReceived < MessageQueue.InfiniteTimeout)
            {
                result.TimeToBeReceived = message.TimeToBeReceived;
            }

            using (var stream = new MemoryStream())
            {
                headerSerializer.Serialize(stream, message.Headers.Select(pair => new HeaderInfo
                {
                    Key = pair.Key,
                    Value = pair.Value
                }).ToList());
                result.Extension = stream.ToArray();
            }

            result.AppSpecific = (int) message.MessageIntent;

            return result;
        }

        public static TransportMessage Map(IDictionary<string, string> from)
        {
            if (!from.ContainsKey(GatewayHeaders.IsGatewayMessage))
            {
                return new TransportMessage();
            }

            var headers = ExtractHeaders(from);
            var to = new TransportMessage(from[NServiceBus + Id], headers);

            to.CorrelationId = StripSlashZeroFromCorrelationId(from[NServiceBus + CorrelationId]) ?? to.Id;

            bool recoverable;
            if (bool.TryParse(from[NServiceBus + Recoverable], out recoverable))
            {
                to.Recoverable = recoverable;
            }

            TimeSpan timeToBeReceived;
            TimeSpan.TryParse(from[NServiceBus + TimeToBeReceived], out timeToBeReceived);
            to.TimeToBeReceived = timeToBeReceived;

            if (to.TimeToBeReceived < MinimumTimeToBeReceived)
            {
                to.TimeToBeReceived = MinimumTimeToBeReceived;
            }

            return to;
        }

        public void When_a_message_is_received_the_Handle_method_should_called_on_the_satellite()
        {
            var tm = new TransportMessage();
            FakeReceiver.FakeMessageReceived(tm);

            Assert.That(_sat.IsMessageHandled, Is.True);
        }

        public static IBasicProperties FillRabbitMqProperties(TransportMessage message, IBasicProperties properties)
        {
            properties.MessageId = message.Id;

            properties.CorrelationId = message.CorrelationId;

            if (message.TimeToBeReceived < TimeSpan.MaxValue)
                properties.Expiration = message.TimeToBeReceived.TotalMilliseconds.ToString();

            properties.SetPersistent(message.Recoverable);

            properties.Headers = message.Headers;

            if (message.Headers.ContainsKey(Headers.EnclosedMessageTypes))
            {
                properties.Type = message.Headers[Headers.EnclosedMessageTypes].Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries).FirstOrDefault();
            }

            if (message.Headers.ContainsKey(Headers.ContentType))
                properties.ContentType = message.Headers[Headers.ContentType];
            else
            {
                properties.ContentType = "application/octet-stream";
            }

            if (message.ReplyToAddress != null && message.ReplyToAddress != Address.Undefined)
                properties.ReplyTo = message.ReplyToAddress.Queue;

            return properties;
        }

        void Defer(TimeSpan defer, TransportMessage message)
        {
            var retryMessageAt = DateTime.UtcNow + defer;

            TransportMessageHeaderHelper.SetHeader(message, Headers.Retries,
                (TransportMessageHeaderHelper.GetNumberOfRetries(message) + 1).ToString(CultureInfo.InvariantCulture));

            var addressOfFaultingEndpoint = TransportMessageHeaderHelper.GetAddressOfFaultingEndpoint(message);

            if (!TransportMessageHeaderHelper.HeaderExists(message, SecondLevelRetriesHeaders.RetriesTimestamp))
            {
                TransportMessageHeaderHelper.SetHeader(message, SecondLevelRetriesHeaders.RetriesTimestamp,
                    DateTimeExtensions.ToWireFormattedString(DateTime.UtcNow));
            }

            logger.DebugFormat("Defer message and send it to {0}", addressOfFaultingEndpoint);

            var sendOptions = new SendOptions(addressOfFaultingEndpoint)
            {
                DeliverAt = retryMessageAt
            };


            MessageDeferrer.Defer(message, sendOptions);
        }

        static bool HasReachedMaxTime(TransportMessage message)
        {
            var timestampHeader = TransportMessageHeaderHelper.GetHeader(message, SecondLevelRetriesHeaders.RetriesTimestamp);

            if (String.IsNullOrEmpty(timestampHeader))
            {
                return false;
            }

            try
            {
                var handledAt = DateTimeExtensions.ToUtcDateTime(timestampHeader);

                if (DateTime.UtcNow > handledAt.AddDays(1))
                {
                    return true;
                }
            }
                // ReSharper disable once EmptyGeneralCatchClause
                // this code won't usually throw but in case a user has decided to hack a message/headers and for some bizarre reason 
                // they changed the date and that parse fails, we want to make sure that doesn't prevent the message from being 
                // forwarded to the error queue.
            catch (Exception)
            {
            }

            return false;
        }

        public void Defer(TransportMessage message, SendOptions sendOptions)
        {
            message.Headers[TimeoutManagerHeaders.RouteExpiredTimeoutTo] = sendOptions.Destination.ToString();

            DateTime deliverAt;

            if (sendOptions.DelayDeliveryWith.HasValue)
            {
                deliverAt = DateTime.UtcNow + sendOptions.DelayDeliveryWith.Value;
            }
            else
            {
                if (sendOptions.DeliverAt.HasValue)
                {
                    deliverAt = sendOptions.DeliverAt.Value;    
                }
                else
                {
                    throw new ArgumentException("A delivery time needs to be specified for Deferred messages");
                }
                
            }

            message.Headers[TimeoutManagerHeaders.Expire] = DateTimeExtensions.ToWireFormattedString(deliverAt);
            
            try
            {
                MessageSender.Send(message, new SendOptions(TimeoutManagerAddress));
            }
            catch (Exception ex)
            {
                Log.Error("There was a problem deferring the message. Make sure that DisableTimeoutManager was not called for your endpoint.", ex);
                throw;
            }
        }

        private SqlCommand BuildSendCommand(SqlConnection connection, TransportMessage transportMessage, Address address)
        {
            var command = connection.CreateCommand();

            command.CommandText = String.Format(SqlCommands.Send, address);
            command.CommandType = CommandType.Text;

            command.Parameters.AddWithValue("@Id", transportMessage.MessageId);
            command.Parameters.AddWithValue("@ReplyTo", transportMessage.ReplyToAddress.ToString());
            command.Parameters.AddWithValue("@Headers", objectSerializer.SerializeObject(transportMessage.Headers));
            command.Parameters.AddWithValue("@Body", transportMessage.Body);

            if (transportMessage.CorrelationId != Guid.Empty)
            {
                command.Parameters.AddWithValue("@CorrelationId", transportMessage.CorrelationId);
            }
            else
            {
                command.Parameters.AddWithValue("@CorrelationId", DBNull.Value);
            }

            if (transportMessage.HasExpiryTime)
            {
                command.Parameters.AddWithValue("@Expires", transportMessage.ExpiryTime);
            }
            else
            {
                command.Parameters.AddWithValue("@Expires", DBNull.Value);
            }

            return command;
        }

        public void Send(object messageToSend, TimeSpan timeToBeReceived)
        {
            var message = new TransportMessage
            {
                TimeToBeReceived = timeToBeReceived
            };

            using (var stream = new MemoryStream())
            {
                serializer.Serialize(new[] { messageToSend }, stream);
                message.Body = stream.ToArray();
            }

            //hack to remove the type info from the json
            var bodyString = Encoding.UTF8.GetString(message.Body);

            var toReplace = ", " + messageToSend.GetType().Assembly.GetName().Name;

            bodyString = bodyString.Replace(toReplace, ", ServiceControl");

            message.Body = Encoding.UTF8.GetBytes(bodyString);
            // end hack
            message.Headers[Headers.EnclosedMessageTypes] = messageToSend.GetType().FullName;
            message.Headers[Headers.ContentType] = ContentTypes.Json; //Needed for ActiveMQ transport

            try
            {
                messageSender.Send(message, new SendOptions(serviceControlBackendAddress) { ReplyToAddress = configure.LocalAddress });
                circuitBreaker.Success();
            }
            catch (Exception ex)
            {
                circuitBreaker.Failure(ex);
            }            
        }

        /// <summary>
        /// Stores the original saga id and type of the incoming message
        /// </summary>
        /// <param name="transportMessage"></param>
        public void MutateIncoming(TransportMessage transportMessage)
        {
            originatingSagaId = null;
            originatingSagaType = null;

            // We need this for backwards compatibility because in v4.0.0 we still have this headers being sent as part of the message even if MessageIntent == MessageIntentEnum.Publish
            if (transportMessage.MessageIntent == MessageIntentEnum.Publish)
            {
                if (transportMessage.Headers.ContainsKey(Headers.SagaId))
                {
                    transportMessage.Headers.Remove(Headers.SagaId);
                }

                if (transportMessage.Headers.ContainsKey(Headers.SagaType))
                {
                    transportMessage.Headers.Remove(Headers.SagaType);
                }
            }

            if (transportMessage.Headers.ContainsKey(Headers.OriginatingSagaId))
            {
                originatingSagaId = transportMessage.Headers[Headers.OriginatingSagaId];
            }

            if (transportMessage.Headers.ContainsKey(Headers.OriginatingSagaType))
            {
                originatingSagaType = transportMessage.Headers[Headers.OriginatingSagaType];
            }
        }

        public TransportMessage ToTransportMessage(BrokeredMessage message)
        {
            TransportMessage t;
            var rawMessage = message.GetBody<byte[]>();

            if (message.Properties.Count == 0)
            {
                t = DeserializeMessage(rawMessage);
            }
            else
            {
                t = new TransportMessage(message.MessageId, message.Properties.ToDictionary(kvp=>kvp.Key,kvp=>kvp.Value.ToString()))
                        {
                            CorrelationId = message.CorrelationId,
                            TimeToBeReceived = message.TimeToLive
                        };

                t.MessageIntent =
                    (MessageIntentEnum)
                    Enum.Parse(typeof(MessageIntentEnum), message.Properties[Headers.MessageIntent].ToString());

                if ( !String.IsNullOrWhiteSpace( message.ReplyTo ) )
                {
                    t.ReplyToAddress = Address.Parse( message.ReplyTo ); // Will this work?
                }

                t.Body = rawMessage;
            }

            return t;
        }

        void HandleProcessingAlwaysFailsForMessage(TransportMessage message, Exception e, int numberOfRetries)
        {
            message.SetExceptionHeaders(e, localAddress ?? config.LocalAddress);

            if (MessageWasSentFromSLR(message))
            {
                SendToErrorQueue(message, e);
                return;
            }

            var flrPart = numberOfRetries > 0
                ? $"Message with '{message.Id}' id has failed FLR and"
                : $"FLR is disabled and the message '{message.Id}'";

            //HACK: We need this hack here till we refactor the SLR to be a first class concept in the TransportReceiver
            if (RetriesQueue == null)
            {
                Logger.ErrorFormat("{0} will be moved to the configured error queue.", flrPart);
                SendToErrorQueue(message, e);
                return;
            }

            var defer = SecondLevelRetriesConfiguration.RetryPolicy.Invoke(message);

            if (defer < TimeSpan.Zero)
            {
                Logger.ErrorFormat(
                    "SLR has failed to resolve the issue with message {0} and will be forwarded to the error queue at {1}",
                    message.Id, ErrorQueue);
                SendToErrorQueue(message, e);
                return;
            }

            SendToRetriesQueue(message, e, flrPart);
        }