/// <summary>队列消费大循环，处理消息后自动确认</summary>
/// <typeparam name="T">消息类型</typeparam>
/// <param name="queue">队列</param>
/// <param name="onMessage">消息处理。如果处理消息时抛出异常，消息将延迟后回到队列</param>
/// <param name="cancellationToken">取消令牌</param>
/// <param name="log">日志对象</param>
/// <param name="idField">消息标识字段名，用于处理错误重试</param>
/// <returns></returns>
public static async Task ConsumeAsync <T>(this RedisReliableQueue <String> queue, Func <T, String, CancellationToken, Task> onMessage, CancellationToken cancellationToken = default, ILog log = null, String idField = null)
{
// 大循环之前，打断性能追踪调用链
DefaultSpan.Current = null;
// 主题
var topic = queue.Key;
if (topic.IsNullOrEmpty())
{
topic = queue.GetType().Name;
}
var rds = queue.Redis;
var tracer = rds.Tracer;
var errLog = log ?? XTrace.Log;
// 备用redis，容错、去重
var rds2 = new FullRedis
{
Name = rds.Name + "Bak",
Server = rds.Server,
UserName = rds.UserName,
Password = rds.Password,
Db = rds.Db == 15 ? 0 : (rds.Db + 1),
Tracer = rds.Tracer,
};
// 消息去重
if (queue.DuplicateExpire > 0 && idField.IsNullOrEmpty())
{
throw new ArgumentNullException(nameof(idField), $"队列[{topic}]消息[{queue.DuplicateExpire}]秒去重，需要指定消息唯一标识idField");
}
var ids = new List <String> {
"Id", "guid", "OrderId", "Code"
};
if (!idField.IsNullOrEmpty() && !ids.Contains(idField))
{
ids.Insert(0, idField);
}
// 超时时间，用于阻塞等待
var timeout = rds.Timeout / 1000 - 1;
while (!cancellationToken.IsCancellationRequested)
{
var msgId = "";
var mqMsg = "";
ISpan span = null;
try
{
// 异步阻塞消费
mqMsg = await queue.TakeOneAsync(timeout, cancellationToken);
if (mqMsg != null)
{
// 埋点
span = tracer?.NewSpan($"redismq:{topic}", mqMsg);
log?.Info($"[{topic}]消息内容为：{mqMsg}");
// 解码
var dic = JsonParser.Decode(mqMsg);
var msg = JsonHelper.Convert <T>(dic);
if (dic.TryGetValue("traceParent", out var tp))
{
span.Detach(tp + "");
}
// 消息标识
foreach (var item in ids)
{
if (dic.TryGetValue(item, out var id))
{
msgId = id + "";
if (!msgId.IsNullOrEmpty())
{
break;
}
}
}
// 消息去重
if (queue.DuplicateExpire > 0)
{
// 抢占msgId，处理异常时退出抢占
var dkey = $"{topic}:Duplicate:{msgId}";
if (!rds2.Add(dkey, queue.Status.Key, queue.DuplicateExpire))
{
log?.Info("队列[{0}]遇到重复消息[{1}]，自动跳过", topic, msgId);
}
else
{
try
{
await onMessage(msg, mqMsg, cancellationToken);
}
catch
{
rds2.Remove(dkey);
throw;
}
}
}
else
{
// 处理消息
await onMessage(msg, mqMsg, cancellationToken);
}
// 确认消息
queue.Acknowledge(mqMsg);
}
else
{
// 没有消息，歇一会
await Task.Delay(1000, cancellationToken);
}
}
catch (ThreadAbortException) { break; }
catch (ThreadInterruptedException) { break; }
catch (Exception ex)
{
span?.SetError(ex, null);
// 消息处理错误超过10次则抛弃
if (!mqMsg.IsNullOrEmpty())
{
if (msgId.IsNullOrEmpty())
{
msgId = mqMsg.MD5();
}
errLog?.Error("[{0}/{1}]消息处理异常：{2} {3}", topic, msgId, mqMsg, ex);
var key = $"{topic}:Error:{msgId}";
var rs = rds2.Increment(key, 1);
if (rs < 10)
{
rds2.SetExpire(key, TimeSpan.FromHours(24));
}
else
{
queue.Acknowledge(mqMsg);
errLog?.Error("[{0}/{1}]错误过多，删除消息", topic, msgId);
}
}
}
finally
{
span?.Dispose();
}
}
}
/// <summary>队列消费大循环，处理消息后自动确认</summary>
/// <typeparam name="T">消息类型</typeparam>
/// <param name="queue">队列</param>
/// <param name="onMessage">消息处理。如果处理消息时抛出异常，消息将延迟后回到队列</param>
/// <param name="cancellationToken">取消令牌</param>
/// <param name="log">日志对象</param>
/// <returns></returns>
public static async Task ConsumeAsync <T>(this RedisReliableQueue <String> queue, Action <String> onMessage, CancellationToken cancellationToken = default, ILog log = null)
{
// 大循环之前，打断性能追踪调用链
DefaultSpan.Current = null;
// 主题
var topic = queue.Key;
if (topic.IsNullOrEmpty())
{
topic = queue.GetType().Name;
}
var rds = queue.Redis;
var tracer = rds.Tracer;
var errLog = log ?? XTrace.Log;
// 备用redis，容错、去重
var rds2 = new FullRedis
{
Name = rds.Name + "Bak",
Server = rds.Server,
UserName = rds.UserName,
Password = rds.Password,
Db = rds.Db == 15 ? 0 : (rds.Db + 1),
Tracer = rds.Tracer,
};
// 超时时间，用于阻塞等待
var timeout = rds.Timeout / 1000 - 1;
while (!cancellationToken.IsCancellationRequested)
{
var mqMsg = "";
ISpan span = null;
try
{
// 异步阻塞消费
mqMsg = await queue.TakeOneAsync(timeout, cancellationToken);
if (mqMsg != null)
{
// 埋点
span = tracer?.NewSpan($"redismq:{topic}", mqMsg);
log?.Info($"[{topic}]消息内容为：{mqMsg}");
// 处理消息
onMessage(mqMsg);
// 确认消息
queue.Acknowledge(mqMsg);
}
else
{
// 没有消息，歇一会
await Task.Delay(1000, cancellationToken);
}
}
catch (ThreadAbortException) { break; }
catch (ThreadInterruptedException) { break; }
catch (Exception ex)
{
span?.SetError(ex, null);
// 消息处理错误超过10次则抛弃
if (!mqMsg.IsNullOrEmpty())
{
var msgId = mqMsg.MD5();
errLog?.Error("[{0}/{1}]消息处理异常：{2} {3}", topic, msgId, mqMsg, ex);
var key = $"{topic}:Error:{msgId}";
var rs = rds2.Increment(key, 1);
if (rs < 10)
{
rds2.SetExpire(key, TimeSpan.FromHours(24));
}
else
{
queue.Acknowledge(mqMsg);
errLog?.Error("[{0}/{1}]错误过多，删除消息", topic, msgId);
}
}
}
finally
{
span?.Dispose();
}
}
}