public Task CancelSchedule(Guid messageId)
{
using var connection = connectionFactory.CreateConnection();
using var channel = connection.CreateModel();
channel.QueueDelete(PostponeMq.InputQueueName(messageId));
channel.ExchangeDelete(PostponeMq.InputExchangeName(messageId));
return(Task.CompletedTask);
}
private static void EnsureTopology(IModel channel, Guid messageId, TimeSpan timeout)
{
var exchangeName = PostponeMq.InputExchangeName(messageId);
var queueName = PostponeMq.InputQueueName(messageId);
channel.ExchangeDeclare(PostponeMq.OutputExchangeName, ExchangeType.Topic, true);
channel.ExchangeDeclare(exchangeName, ExchangeType.Topic, true);
channel.QueueDeclare(queueName, true, false, false,
new Dictionary <string, object>
{
["x-dead-letter-exchange"] = PostponeMq.OutputExchangeName,
["x-message-ttl"] = (int)timeout.TotalMilliseconds
});
channel.QueueBind(queueName, exchangeName, "#");
}
public Task <Guid> ScheduleMessage(object message, string routingKey, TimeSpan timeout)
{
using var connection = connectionFactory.CreateConnection();
using var channel = connection.CreateModel();
var messageId = Guid.NewGuid();
EnsureTopology(channel, messageId, timeout);
var messageBody = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(message));
var basicProperties = new BasicProperties {
Persistent = true
};
var exchangeName = PostponeMq.InputExchangeName(messageId);
channel.BasicPublish(exchangeName, routingKey, basicProperties, messageBody);
return(Task.FromResult(messageId));
}