/// <summary>
/// CosumeTaskProcedure
/// </summary>
private async Task CosumeAsync(CancellationToken cancellationToken)
{
while (!cancellationToken.IsCancellationRequested)
{
try
{
long now = TimeUtil.UtcNowUnixTimeSeconds;
//1, Get Entity
IDatabase database = await RedisInstanceManager.GetDatabaseAsync(_instanceSetting, _logger).ConfigureAwait(false);
RedisValue redisValue = await database.ListRightPopLeftPushAsync(RedisEventBusEngine.QueueName(_eventType), RedisEventBusEngine.HistoryQueueName(_eventType)).ConfigureAwait(false);
if (redisValue.IsNullOrEmpty)
{
_logger.LogTrace("ConsumeTask Sleep, {InstanceName}, {eventType}", _instanceSetting.InstanceName, _eventType);
await Task.Delay(_cONSUME_INTERVAL_SECONDS * 1000, cancellationToken).ConfigureAwait(false);
continue;
}
EventMessageEntity?entity = SerializeUtil.FromJson <EventMessageEntity>(redisValue);
if (entity == null)
{
_logger.LogCritical("有空EventMessageEntity, {eventType}, {value}", _eventType, redisValue);
continue;
}
using IDistributedLock distributedLock = await _lockManager.NoWaitLockAsync(
"eBusC_" + entity.Guid,
TimeSpan.FromSeconds(_options.EventBusConsumerAckTimeoutSeconds),
false,
cancellationToken).ConfigureAwait(false);
if (!distributedLock.IsAcquired)
{
//竟然有人在检查entity.Guid,好了，这下肯定有人在处理了，任务结束。哪怕那个人没处理成功，也没事，等着history吧。
continue;
}
//2, 过期检查
if (now - entity.Timestamp > _eventBusEventMessageExpiredSeconds)
{
_logger.LogCritical("有EventMessage过期，{eventType}, {entity}", _eventType, SerializeUtil.ToJson(entity));
await distributedLock.DisposeAsync().ConfigureAwait(false);
continue;
}
//3, 防重检查
string AcksSetName = RedisEventBusEngine.AcksSetName(_eventType);
bool?isExist = await IsAcksExistedAsync(database, AcksSetName, entity.Guid).ConfigureAwait(false);
if (isExist == null || isExist.Value)
{
_logger.LogInformation("有EventMessage重复，{eventType}, {entity}", _eventType, SerializeUtil.ToJson(entity));
await distributedLock.DisposeAsync().ConfigureAwait(false);
continue;
}
//4, Handle Entity
try
{
await _eventHandler.HandleAsync(entity.JsonData, cancellationToken).ConfigureAwait(false);
}
catch (Exception ex)
{
_logger.LogCritical(ex, "处理消息出错, {_eventType}, {entity}", _eventType, SerializeUtil.ToJson(entity));
}
//5, Acks
await AddAcksAsync(now, database, AcksSetName, entity.Guid, entity.Timestamp).ConfigureAwait(false);
_logger.LogTrace("Consume Task For {eventType} Stopped.", _eventType);
}
catch (RedisConnectionException ex)
{
_logger.LogError(ex, "Consume 中出现Redis链接问题. {eventType}", _eventType);
await Task.Delay(5000, cancellationToken).ConfigureAwait(false);
}
catch (RedisTimeoutException ex)
{
_logger.LogError(ex, "Consume 中出现Redis超时问题. {eventType}", _eventType);
}
catch (Exception ex)
{
_logger.LogCritical(ex, "Consume 出现未知问题. {eventType}", _eventType);
}
}
}
private async Task ScanHistoryAsync(CancellationToken cancellationToken)
{
while (!cancellationToken.IsCancellationRequested)
{
try
{
RedisKey[] redisKeys = new RedisKey[] {
RedisEventBusEngine.HistoryQueueName(_eventType),
RedisEventBusEngine.AcksSetName(_eventType),
RedisEventBusEngine.QueueName(_eventType)
};
RedisValue[] redisArgvs = new RedisValue[] {
TimeUtil.UtcNowUnixTimeSeconds,
_options.EventBusConsumerAckTimeoutSeconds
};
IDatabase database = await RedisInstanceManager.GetDatabaseAsync(_instanceSetting, _logger).ConfigureAwait(false);
int result = (int)await database.ScriptEvaluateAsync(
_loadedHistoryLua,
redisKeys,
redisArgvs).ConfigureAwait(false);
if (result == 0)
{
//还没有数据，等会吧
_logger.LogTrace("ScanHistory {InstanceName} 中,还没有数据，，EventType:{eventType}", _instanceSetting.InstanceName, _eventType);
await Task.Delay(10 * 1000, cancellationToken).ConfigureAwait(false);
}
else if (result == 1)
{
//时间太早，等会再检查
_logger.LogTrace("ScanHistory {InstanceName} 中,数据还太新，一会再检查，，EventType:{eventType}", _instanceSetting.InstanceName, _eventType);
await Task.Delay(10 * 1000, cancellationToken).ConfigureAwait(false);
}
else if (result == 2)
{
//成功
_logger.LogTrace("ScanHistory {InstanceName} 中,消息已被处理，现在移出History，EventType:{eventType}", _instanceSetting.InstanceName, _eventType);
}
else if (result == 3)
{
//重新放入队列再发送
_logger.LogWarning("ScanHistory {InstanceName} 中,消息可能被遗漏， 重新放入队列，，EventType:{eventType}", _instanceSetting.InstanceName, _eventType);
}
else
{
//出错
}
}
catch (RedisServerException ex) when(ex.Message.StartsWith("NOSCRIPT", StringComparison.InvariantCulture))
{
_logger.LogError(ex, "NOSCRIPT, will try again.");
InitLodedLua();
continue;
}
catch (RedisConnectionException ex)
{
_logger.LogError(ex, "Scan History 中出现Redis链接问题. {EventType}", _eventType);
await Task.Delay(5000, cancellationToken).ConfigureAwait(false);
}
catch (RedisTimeoutException ex)
{
_logger.LogError(ex, "Scan History 中出现Redis超时问题. {EventType}", _eventType);
}
catch (Exception ex)
{
_logger.LogCritical(ex, "Scan History 出现未知问题. {EventType}", _eventType);
}
}
_logger.LogTrace("History Task For {eventType} Stopped.", _eventType);
}