Go Scheduling at irregular times

<p>Hi, a go newbie here. I wanted to schedule some tasks in my go program at specific times. It&#39;s pretty straightforward to do it if you have to schedule at regular intervals (every 30 seconds, every 15 seconds etc.) . How about if i needed to execute tasks at times such as 1st minute , 3rd minute, 8th minute. If anyone could help me or point me in the right direction. </p> <p>Thanks!!</p> <hr/>**评论：**<br/><br/>colek42: <pre><p>Sounds like a cron job. This may work, or serve an an example. <a href="https://godoc.org/github.com/robfig/cron" rel="nofollow">https://godoc.org/github.com/robfig/cron</a></p></pre>RwKroon: <pre><p>I can recommend that one</p></pre>UniverseCity: <pre><p>Do you know the exact times ahead of time? Or do you just want something like an exponential backoff? It sounds like you&#39;re describing the latter, in which case you could have a goroutine with a loop in which you do some work, call <code>time.Sleep(n)</code>, and increment <code>n</code> on each iteration. </p></pre>SchoolPit6: <pre><p>I do know the exact times before hand </p></pre>UniverseCity: <pre><p>Where do you want to run this? You could write a small go service to use <a href="https://cloud.google.com/appengine/docs/standard/go/config/cron" rel="nofollow">AppEngine Cron</a> that&#39;ll fire at specific times. </p></pre>SchoolPit6: <pre><p>Will be running on my desktop itself. So can’t use Appengine. </p></pre>therealfakemoot: <pre><p>A cursor google search for &#34;golang cron&#34; yielded <a href="https://godoc.org/github.com/robfig/cron" rel="nofollow">this</a> which seems reasonable enough. Read some documentation on the crontab specification, it allows you to create pretty complex time based patterns for running jobs.</p> <p>Alternatively, you could roll your own solution. </p> <blockquote> <p>if i needed to execute tasks at times such as 1st minute , 3rd minute, 8th minute</p> </blockquote> <p>You may be interested to learn about <a href="https://en.wikipedia.org/wiki/Modular_arithmetic" rel="nofollow">modular arithmetic</a>. Golang has a builtin library for fetching the current clock time. Find the hour/minute/day/whatever, modulo it by the interval you want, if the result == 0, run the task.</p> <p>I&#39;d strongly recommend leveraging an existing scheduling framework, though, to avoid introducing &#39;novice&#39; level bugs or issues involving timezone/leap second/minute/hour/day/year handling.</p></pre>WikiTextBot: <pre><p><strong>Modular arithmetic</strong></p> <p>In mathematics, modular arithmetic is a system of arithmetic for integers, where numbers &#34;wrap around&#34; upon reaching a certain value—the modulus (plural moduli). The modern approach to modular arithmetic was developed by Carl Friedrich Gauss in his book Disquisitiones Arithmeticae, published in 1801.</p> <p>A familiar use of modular arithmetic is in the 12-hour clock, in which the day is divided into two 12-hour periods. If the time is 7:00 now, then 8 hours later it will be 3:00.</p> <hr/> <p>^[ <a href="https://www.reddit.com/message/compose?to=kittens_from_space" rel="nofollow">^PM</a> ^| <a href="https://reddit.com/message/compose?to=WikiTextBot&amp;message=Excludeme&amp;subject=Excludeme" rel="nofollow">^Exclude ^me</a> ^| <a href="https://np.reddit.com/r/golang/about/banned" rel="nofollow">^Exclude ^from ^subreddit</a> ^| <a href="https://np.reddit.com/r/WikiTextBot/wiki/index" rel="nofollow">^FAQ ^/ ^Information</a> ^| <a href="https://github.com/kittenswolf/WikiTextBot" rel="nofollow">^Source</a> ^| <a href="https://www.reddit.com/r/WikiTextBot/wiki/donate" rel="nofollow">^Donate</a> ^] ^Downvote ^to ^remove ^| ^v0.28</p></pre>