/// <summary>
/// 重新连接
/// </summary>
/// <param name="connection"></param>
/// <param name="handler"></param>
/// <param name="exChangeName"></param>
/// <param name="queueName"></param>
/// <param name="routingKey"></param>
/// <param name="isNeedDLX"></param>
/// <returns></returns>
private static IModel Consume(IConnection connection, Func <string, Task <ConsumeActionEnum> > handler, RMQSubscribeModel subscribeModel)
{
var channel = DefineQueue(connection, subscribeModel);
var consumer = new EventingBasicConsumer(channel);
ConsumeActionEnum consumeResult = ConsumeActionEnum.RETRY;
Task <ConsumeActionEnum> result;
consumer.Received += async(ch, ea) =>
{
var body = ea.Body;
var message = Encoding.UTF8.GetString(body);
result = handler(message);
consumeResult = await result;
if (consumeResult == ConsumeActionEnum.ACCEPT)
{
channel.BasicAck(ea.DeliveryTag, false); //消息从队列中删除
}
else if (consumeResult == ConsumeActionEnum.RETRY)
{
channel.BasicNack(ea.DeliveryTag, false, true); //消息重回队列
}
else
{
channel.BasicNack(ea.DeliveryTag, false, false); //消息直接丢弃
}
};
channel.BasicConsume(subscribeModel.QueueName, false, consumer);
return(channel);
}
/// <summary>
/// 拉模式消费死信队列
/// </summary>
/// <returns></returns>
public static async Task <IModel> PullMessageConsumeForDLXAsync(Func <string, Task <ConsumeActionEnum> > handler, RMQSubscribeModel subscribeModel)
{
var connection = RabbitMQBaseHelper.CreateMQConnectionInPoolNew();
// var channel = connection.CreateModel();
var channel = DefineQueue(connection, subscribeModel);
BasicGetResult response = channel.BasicGet(RabbitMQConstant.DLXPrefix + subscribeModel.QueueName, false);
if (response != null)
{
string message = Encoding.UTF8.GetString(response.Body);
ConsumeActionEnum consumeResult = ConsumeActionEnum.RETRY;
Task <ConsumeActionEnum> result = handler(message);
consumeResult = await result;
if (consumeResult == ConsumeActionEnum.ACCEPT)
{
channel.BasicAck(response.DeliveryTag, false); //消息从队列中删除
}
else if (consumeResult == ConsumeActionEnum.RETRY)
{
channel.BasicNack(response.DeliveryTag, false, true); //消息重回队列
}
else
{
channel.BasicNack(response.DeliveryTag, false, false); //消息直接丢弃
}
}
else
{
Console.WriteLine($"{RabbitMQConstant.DLXPrefix + subscribeModel.QueueName}暂无可消费信息");
}
RabbitMQBaseHelper.ResetMQConnectionToFree(connection);
return(channel);
}
