/// <summary> 定义并绑定队列 </summary>
/// <param name="queue"></param>
/// <param name="key"></param>
/// <param name="option"></param>
private void DeclareAndBindQueue(string queue, string key, RabbitMqSubscribeOption option)
{
var exchange = string.IsNullOrWhiteSpace(option.Exchange) ? _brokerName : option.Exchange;
_consumerChannel.ExchangeDeclare(exchange, option.ExchangeType, option.Durable);
if (option.EnableXDead)
{
_consumerChannel.DeclareWithDlx(queue, exchange, key, option);
}
}
/// <summary> 接收消息 </summary>
/// <param name="queue">队列</param>
/// <param name="ea"></param>
/// <param name="option"></param>
/// <returns></returns>
private async Task ReceiveMessage(string queue, BasicDeliverEventArgs ea, RabbitMqSubscribeOption option)
{
try
{
await SubscriptionManager.ProcessEvent(queue, ea.Body.ToArray());
_consumerChannel.BasicAck(ea.DeliveryTag, false);
}
catch (Exception ex)
{
//非业务异常,可重新入队
if (ex.GetBaseException() is BusiException busi)
{
//拒收，不重新入列
_consumerChannel.BasicNack(ea.DeliveryTag, false, false);
_logger.LogWarning($"{queue},busi:{busi.Message}");
RemoteLog(queue, ea.Body.ToArray(), busi);
return;
}
_logger.LogError(ex, ex.Message);
if (!option.EnableRetry)
{
_consumerChannel.BasicNack(ea.DeliveryTag, false, false);
return;
}
var maxTime = option.Times.Length;
var times = 0;
if (ea.BasicProperties.Headers != null &&
ea.BasicProperties.Headers.TryGetValue(DelayTimesKey, out var t))
{
times = t.CastTo(0);
}
if (times >= maxTime)
{
//拒收，不重新入列
_consumerChannel.BasicNack(ea.DeliveryTag, false, false);
_logger.LogWarning($"{queue},retry times > {maxTime}");
return;
}
//延时入列
times++;
var delay = option.Times[times - 1];
_consumerChannel.BasicAck(ea.DeliveryTag, false);
if (!_connection.IsConnected)
{
_connection.TryConnect();
}
using (var channel = _connection.CreateModel())
{
var prop = _consumerChannel.CreateBasicProperties();
prop.DeliveryMode = 2;
prop.Headers = prop.Headers ?? new Dictionary <string, object>();
prop.Headers.Add(DelayTimesKey, times);
//绑定队列路由
channel.QueueBind(queue, _brokerName, queue);
channel.DelayPublish(_brokerName, queue, ea.Body.ToArray(), delay, prop);
}
}
}
