public async Task Execute(BackgroundProcessContext context)
{
List <double> nextExecuteDelays = new List <double>(); //记录每个任务的下次执行时间，取最小的等待
try
{
var lockKey = $"{_options.TopicPrefix}crontab:lock";
await _redisStorage.Lock(lockKey, TimeSpan.FromMinutes(1), async() =>
{
var list = await _redisStorage.GetAllCrontabJobId();
foreach (var jobId in list)
{
if (context.IsShutdownRequested)
{
return;
}
var now = DateTime.Now;
var jobData = await _redisStorage.GetCrontabJobData(jobId);
if (jobData == null)
{
continue;
}
if (jobData.Status == (int)CrontabJobStatus.Disabled)
{
continue; //如果设置启用时，要把LastExecuteTime设置为当前时间
}
//暂未实现
}
}, () => Task.CompletedTask);
}
finally
{
var minValue = nextExecuteDelays.Any() ? nextExecuteDelays.Min() : TimeSpan.FromSeconds(_options.CrontabIntervalSecond).TotalMilliseconds;
var delay = minValue;// Math.Max(minValue, 1000);
_redisStorage.WaitForCrontabJob(TimeSpan.FromMilliseconds(delay), context.CancellationToken);
}
}