private async Task StartSub(ConsumerInfo consumer, bool first)
{
var child = new ConsumerChild
{
Channel = await client.PullModel(),
Qos = consumer.MinQos
};
if (first)
{
child.Channel.Model.ExchangeDeclare(consumer.Exchange, "direct", true);
child.Channel.Model.QueueDeclare(consumer.Queue, true, false, false, null);
child.Channel.Model.QueueBind(consumer.Queue, consumer.Exchange, consumer.RoutingKey);
}
child.Channel.Model.BasicQos(0, consumer.MinQos, false);
child.BasicConsumer = new EventingBasicConsumer(child.Channel.Model);
child.BasicConsumer.Received += async(ch, ea) =>
{
await Process(consumer, child, ea, 0);
};
child.BasicConsumer.ConsumerTag = child.Channel.Model.BasicConsume(consumer.Queue, consumer.AutoAck, child.BasicConsumer);
child.NeedRestart = false;
consumer.Children.Add(child);
consumer.NowQos += child.Qos;
consumer.StartTime = DateTime.UtcNow;
}
private async Task Process(ConsumerInfo consumer, ConsumerChild consumerChild, BasicDeliverEventArgs ea, int count)
{
if (count > 0)
{
await Task.Delay(count * 1000);
}
try
{
await consumer.Handler.Notice(ea.Body);
if (!consumer.AutoAck)
{
try
{
consumerChild.Channel.Model.BasicAck(ea.DeliveryTag, false);
}
catch
{
consumerChild.NeedRestart = true;
}
}
}
catch (Exception exception)
{
logger.LogError(exception.InnerException ?? exception, $"An error occurred in {consumer.Exchange}-{consumer.Queue}");
if (consumer.ErrorReject)
{
consumerChild.Channel.Model.BasicReject(ea.DeliveryTag, true);
}
else
{
if (count > 3)
{
consumerChild.NeedRestart = true;
}
else
{
await Process(consumer, consumerChild, ea, count + 1);
}
}
}
}
private async Task ExpandQos(ConsumerInfo consumer)
{
if (consumer.NowQos + consumer.IncQos <= consumer.MaxQos)
{
var child = new ConsumerChild
{
Channel = await client.PullModel(),
Qos = consumer.IncQos
};
child.Channel.Model.BasicQos(0, consumer.IncQos, false);
child.BasicConsumer = new EventingBasicConsumer(child.Channel.Model);
child.BasicConsumer.Received += async(ch, ea) =>
{
await Process(consumer, child, ea, 0);
};
child.BasicConsumer.ConsumerTag = child.Channel.Model.BasicConsume(consumer.Queue, consumer.AutoAck, child.BasicConsumer);
child.NeedRestart = false;
consumer.Children.Add(child);
consumer.NowQos += child.Qos;
consumer.StartTime = DateTime.UtcNow;
}
}