private void Report(IJob job, JobItem ji, Object ext = null)
{
try
{
Ant.Report(ji, ext);
}
catch (Exception ex)
{
XTrace.WriteLine("[{0}]的[{1}]状态报告失败！{2}", job, ji.Status, ex.GetTrue().Message);
}
}
/// <summary>申请任务</summary>
/// <param name="job">作业</param>
/// <param name="data">扩展数据</param>
/// <param name="count">要申请的任务个数</param>
/// <returns></returns>
public override IJobItem[] Acquire(IJob job, IDictionary <String, Object> data, Int32 count)
{
var list = new List <IJobItem>();
if (!job.Enable)
{
return(list.ToArray());
}
// 当前时间减去偏移量，作为当前时间。数据抽取不许超过该时间
var now = DateTime.Now.AddSeconds(-job.Offset);
// 避免毫秒级带来误差，每毫秒有10000个滴答
var sec = now.Ticks / 1_000_0000;
now = new DateTime(sec * 1_000_0000);
var step = job.Step;
if (step <= 0)
{
step = 30;
}
var start = job.Start;
for (var i = 0; i < count; i++)
{
// 开始时间和结束时间是否越界
if (start >= now)
{
break;
}
var end = start.AddSeconds(step);
// 任务结束时间超过作业结束时间时，取后者
if (job.End.Year > 2000 && end > job.End)
{
end = job.End;
}
// 时间片必须严格要求按照步进大小分片，除非有合适的End
if (job.Mode != JobModes.Alarm)
{
if (end > now)
{
break;
}
}
// 时间区间判断
if (start >= end)
{
break;
}
// 切分新任务
var set = new JobItem
{
Start = start,
End = end,
Step = job.Step,
Offset = job.Offset,
BatchSize = job.BatchSize,
};
// 更新任务
job.Start = end;
start = end;
list.Add(set);
}
if (list.Count > 0)
{
_File.UpdateTime = DateTime.Now;
_File.SaveAsync();
}
return(list.ToArray());
}
