private static bool SendDirect(BaseMessage message, int delaySend = 0)
{
if (string.IsNullOrWhiteSpace(message.Source))
{
throw new ArgumentNullException("message.Source");
}
if (!PrePersistMessage(message))
{
return(false);
}
var messageType = message.GetType();
delaySend = delaySend == 0 ? delaySend : Math.Max(delaySend, 1000); // 至少保证1秒的延迟，否则意义不大
using (var pooled = InnerCreateChannel(messageType))
{
IModel channel = pooled.Channel;
pooled.PreRecord(message.MsgHash);
var exchange = string.Empty;
var route_key = string.Empty;
var queue = string.Empty;
EnsureQueue(channel, messageType, out exchange, out route_key, out queue, delaySend);
var json = JsonConvert.SerializeObject(message);
var bytes = Encoding.UTF8.GetBytes(json);
var props = channel.CreateBasicProperties();
props.ContentType = "text/plain";
props.DeliveryMode = 2;
channel.BasicPublish(exchange, route_key, props, bytes);
var time_out = Math.Max(default_retry_wait, message.RetryCount_Publish * 2 /*2倍往上扩大，防止出现均等*/ * 1000);
var ret = channel.WaitForConfirms(TimeSpan.FromMilliseconds(time_out));
if (!ret)
{
// 数据库更新该条消息的状态信息
if (message.RetryCount_Publish < default_retry_count)
{
var ok = _message_queue_helper.Update(
message.MsgHash,
fromStatus1: MsgStatus.Created, // 之前的状态只能是1 Created 或者2 Retry
fromStatus2: MsgStatus.Retrying,
toStatus: MsgStatus.Retrying);
if (ok)
{
message.RetryCount_Publish += 1;
message.LastRetryTime = DateTime.Now;
direct_queue.Enqueue(message);
return(true);
}
throw new Exception("数据库update出现异常");
}
throw new Exception($"消息发送超过最大重试次数（{default_retry_count}次）");
}
}
return(true);
}
// broker正常接受到消息，会触发该ack事件
private void Channel_BasicAcks(object sender, BasicAckEventArgs e)
{
// 数据更新该条消息的状态信息
long msgHash = 0;
if (_unconfirm.TryGetValue(e.DeliveryTag, out msgHash))
{
var ok = _message_queue_helper.Update(
msgHash,
fromStatus1: MsgStatus.Created, // 之前的状态只能是1 Created 或者2 Retry
fromStatus2: MsgStatus.Retrying,
toStatus: MsgStatus.ArrivedBroker);
if (ok)
{
_unconfirm.Remove(e.DeliveryTag);
}
else
{
throw new Exception("数据库update出现异常");
}
}
}
