public void Consume(Action <string> consumeAction, string queue)
{
try
{
using (var channel = _conn.CreateModel())
{
channel.QueueDeclare(queue, RabbitMqParameters.IsDurable, false, true, null);
//如果接受一个消息但是没有应答，客户端不会接受下一个消息
channel.BasicQos(0, 1, false);
//定义一个消费者在队列上
var consumer2 = new EventingBasicConsumer(channel);
//消费队列 设置应答模式为程序主动应答
while (true)
{
Thread.Sleep(100);
consumer2.Received += (sender, ea) =>
{
MsgConsumeResult consumeResult = MsgConsumeResult.Retry;
ulong delivertTag = 0;
delivertTag = ea.DeliveryTag;
byte[] data = ea.Body;
string msg = Encoding.UTF8.GetString(data);
try
{
consumeAction(msg);
consumeResult = MsgConsumeResult.Accept;
}
catch (Exception)
{
consumeResult = MsgConsumeResult.Reject;
// 记录日志
// TODO...
}
finally
{
switch (consumeResult)
{
case MsgConsumeResult.Accept:
//回复确认处理成功
channel.BasicAck(delivertTag, false);
break;
case MsgConsumeResult.Reject:
//严重错误 写日志
channel.BasicNack(delivertTag, false, false);
break;
}
}
};
channel.BasicConsume(queue, false, consumer2);
}
}
}
catch (Exception)
{
throw;
}
}
public void Consume(Func <string, bool> consumeFunc, string queue)
{
try
{
using (var channel = _conn.CreateModel())
{
channel.QueueDeclare(queue, RabbitMqParameters.IsDurable, false, true, null);
//如果接受一个消息但是没有应答，客户端不会接受下一个消息
channel.BasicQos(0, 1, false);
//定义一个消费者在队列上
var consumer = new EventingBasicConsumer(channel);
//消费队列 设置应答模式为程序主动应答
while (true)
{
Thread.Sleep(100);
int tryNum = 0;
consumer.Received += (sender, ea) =>
{
MsgConsumeResult consumeResult = MsgConsumeResult.Retry;
ulong delivertTag = 0;
delivertTag = ea.DeliveryTag;
byte[] data = ea.Body;
string msg = Encoding.UTF8.GetString(data);
try
{
if (consumeFunc(msg))
{
consumeResult = MsgConsumeResult.Accept;
}
else
{
consumeResult = MsgConsumeResult.Retry;
}
}
catch (Exception)
{
consumeResult = MsgConsumeResult.Reject;
// 记录日志
// TODO...
}
finally
{
switch (consumeResult)
{
case MsgConsumeResult.Accept:
//回复确认处理成功
channel.BasicAck(delivertTag, false);
break;
case MsgConsumeResult.Reject:
//从消息队列中抛弃
channel.BasicNack(delivertTag, false, false);
break;
case MsgConsumeResult.Retry:
tryNum += 1;
if (tryNum < 5)
{
channel.BasicNack(delivertTag, false, true); //重试次数小于等于5，继续重试
}
else
{
channel.BasicNack(delivertTag, false, false); //重试次数大于5，抛弃并记录日志
tryNum = 0;
// 记录日志
// TODO...
}
break;
}
}
};
channel.BasicConsume(queue, false, consumer);
}
}
}
catch (Exception)
{
throw;
}
}
