public override async Task PublishMessageAsync(IMessage message, CancellationToken cancellationToken)
{
if (message == null)
{
throw new ArgumentNullException(nameof(message));
}
// Only process messages for which there are defined exchanges.
Type messageType = message.GetType();
if (!PublisherModule.IsExchangeMessage(messageType))
{
return;
}
// Lookup the exchange associated with the message and the bus
// on which it should be created.
ExchangeMeta definition = PublisherModule.GetDefinition(messageType);
IBus bus = BusModule.GetBus(definition.BusName);
// Create the exchange/queue:
CreatedExchange createdExchange = await CreateExchange(bus, definition).ConfigureAwait(false);
LogPublishedMessage(createdExchange, message);
// Publish the message to the created exchange/queue.
await definition.PublisherStrategy.Publish(this, createdExchange,
message,
cancellationToken);
}
private void LogPublishedMessage(CreatedExchange exchange, IMessage message)
{
Logger.LogTraceDetails(RabbitMqLogEvents.PublisherEvent,
"Message being Published to Message Bus.",
new {
exchange.Definition.BusName,
exchange.Definition.ExchangeName,
exchange.Definition.QueueMeta?.QueueName,
exchange.Definition.ContentType,
Message = message
});
}
/// <summary>
/// Logs the provided deserialized message and the information about the exchange and
/// queue from which it was received.
/// </summary>
/// <param name="message">The received message.</param>
public void LogReceivedMessage(IMessage message)
{
Logger.LogTraceDetails(RabbitMqLogEvents.SubscriberEvent,
"Message Received from Message Bus.",
new {
Bus = Subscriber.QueueMeta.Exchange.BusName,
Exchange = Subscriber.QueueMeta.Exchange.ExchangeName,
Queue = Subscriber.QueueMeta.QueueName,
MessageProps.ContentType,
Consumer = Subscriber.DispatchInfo.ConsumerType.Name,
Handler = Subscriber.DispatchInfo.MessageHandlerMethod.Name,
Message = message
});
}