https://riad.run/tags/concurrency/Recent content in Concurrency on random thoughtsHugoen-USSat, 11 Mar 2023 00:00:00 +0000https://riad.run/posts/go-signals-and-graceful-shutdown/Sat, 11 Mar 2023 00:00:00 +0000https://riad.run/posts/go-signals-and-graceful-shutdown/<p><strong>All the code samples used in this post are available</strong> <a href="https://github.com/riadafridishibly/go-graceful-shutdown" rel="external noopener"><em>here.</em></a></p> <h2 id="graceful-shutdown">Graceful Shutdown<a class="heading-anchor" href="#graceful-shutdown" aria-label="Link to this section">#</a> </h2><p>When a process is running for a long time, sometimes we want to quit the running program. If it&rsquo;s a CLI process we press <code>CTRL+C</code> or send specific kill signals. For GUI applications we quit from the menu or if the process becomes nonresponsive we find the <code>PID</code> of the process and then run <code>kill -9 &lt;PID&gt;</code>. These actions trigger an event and the event is sent to the specific process which sometimes causes the process to exit. In a stateful program, we want to save the states or perform cleanups before exiting the process. This safe exit process is called graceful shutdown.</p>