public Task StartAsync(CancellationToken cancellationToken)
{
// Create a channel for this reader
_channel = _connection.CreateChannel();
// Create a consumer for the queue. This is a method implemented by RabbitMQ.Client to easily subscribe to incoming messages on this queue
var consumer = new EventingBasicConsumer(_channel);
// Add an event handler for receiving messages on the queue
consumer.Received += (evt, evt2) =>
{
if (HandleMessage(evt2))
{
// Acknowledge this message as handled
_channel.BasicAck(evt2.DeliveryTag, false);
}
else
{
// Reject the message and put it back on the queue for trying again.
_channel.BasicReject(evt2.DeliveryTag, true);
}
};
// On the provided queue name, register our consumer as a consumer.
_channel.BasicConsume(_queueName.Name, false, consumer);
return(Task.CompletedTask);
}
public Task PublishMessageAsync <T>(string exchange, string routingKey, string messageType, T value)
{
using var channel = _connection.CreateChannel();
var basicProperties = channel.CreateBasicProperties();
basicProperties.ContentType = "application/json";
basicProperties.DeliveryMode = 2;
// Add a MessageType header, this part is crucial for our solution because it is our way of distinguishing messages
basicProperties.Headers = new Dictionary <string, object> {
["MessageType"] = messageType
};
var body = JsonSerializer.SerializeToUtf8Bytes(value);
// Publish this without a routing key to the RabbitMQ broker
channel.BasicPublish(exchange, routingKey, true, basicProperties, body);
return(Task.CompletedTask);
}