不到一分钟的Hangfire重复执行任务

问题描述

是否有一种方法可以每隔几秒钟设置一次hangfire周期性作业?我不寻求解决方案，即一劳永逸"任务会产生另一个一劳永逸"任务，如果没有，建议的替代方法是什么?

Is there a way to set hangfire recurring jobs every few seconds?I do not seek a solution where fire and forget task creates another fire and forget task, and if not, what are suggested alternatives?

推荐答案

不确定何时支持该功能，但已在带有Hangfire 1.7.0的ASP.NET Core 2.0中进行了尝试.以下代码每20秒调度一次作业:

Not sure when this became supported but tried this in ASP.NET Core 2.0 with Hangfire 1.7.0. The following code schedules a job every 20 seconds:

RecurringJob.AddOrUpdate<SomeJob>(
    x => x.DoWork(),
    "*/20 * * * * *");

如果我没记错的话，由于Hangfire使用 NCrontab 允许cron表达式具有6个标记(第二个粒度而不是分钟的粒度).

If I am not mistaken 6 tokens (as opposed to standard 5 tokens) is supported due to Hangfire use of NCrontab which allows cron expressions with 6 tokens (second granularity instead of minute granularity).

Hangfire仪表板还很好地显示了运行之间的较小时间间隔:

Hangfire dashboard also nicely shows the small time interval between runs:

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