Question

我已经通过使用Hangfire库计划了一份工作。我的预定代码如下。

BackgroundJob.Schedule(() => UserRepository.DownGradeUserPlan(2),TimeSpan.FromDays(7));

public static bool DownGradeUserPlan(int userId)
    {
        //Write login here
    }

现在，我想稍后在某些事件中删除此计划作业。

Answer 1

BackgroundJob.Schedule返回该作业的ID，您可以使用它删除该作业：

var jobId = BackgroundJob.Schedule(() => UserRepository.DownGradeUserPlan(2),TimeSpan.FromDays(7));

BackgroundJob.Delete(jobId);

Answer 2

您无需保存其ID即可稍后检索作业。相反，您可以使用Hangfire API的 MonitoringApi 类。请注意，您将需要根据需要过滤出作业。

文本是示例代码中的自定义类。

public void ProcessInBackground(Text text)
{
    // Some code
}

public void SomeMethod(Text text)
{
    // Some code

    // Delete existing jobs before adding a new one
    DeleteExistingJobs(text.TextId);

    BackgroundJob.Enqueue(() => ProcessInBackground(text));
}

private void DeleteExistingJobs(int textId)
{
    var monitor = JobStorage.Current.GetMonitoringApi();

    var jobsProcessing = monitor.ProcessingJobs(0, int.MaxValue)
        .Where(x => x.Value.Job.Method.Name == "ProcessInBackground");
    foreach (var j in jobsProcessing)
    {
        var t = (Text)j.Value.Job.Args[0];
        if (t.TextId == textId)
        {
            BackgroundJob.Delete(j.Key);
        }
    }

    var jobsScheduled = monitor.ScheduledJobs(0, int.MaxValue)
        .Where(x => x.Value.Job.Method.Name == "ProcessInBackground");
    foreach (var j in jobsScheduled)
    {
        var t = (Text)j.Value.Job.Args[0];
        if (t.TextId == textId)
        {
            BackgroundJob.Delete(j.Key);
        }
    }
}

我的参考：https://discuss.hangfire.io/t/cancel-a-running-job/603/10

取消或删除计划的作业-HangFire

2 个答案: