https://vacua.dev/tags/state-machines/Recent content in State-Machines on Brian FaustHugoen-USMon, 01 Jan 0001 00:00:00 +0000https://vacua.dev/thoughts/a-method-should-tell-you-what-changed/Thu, 01 Oct 2020 00:00:00 +0000https://vacua.dev/thoughts/a-method-should-tell-you-what-changed/<p>A balance reservation could be pending, captured, released, or expired. Only a pending reservation could move to one of the other three states.</p> <p>That gave the system three commands:</p> <figure class="code-figure"> <div class="code-block" data-copy-code> <button class="copy-code" type="button" aria-label="Copy code">copy</button><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-text" data-lang="text"><span class="line"><span class="cl">capture reservation </span></span><span class="line"><span class="cl">release reservation </span></span><span class="line"><span class="cl">expire reservation</span></span></code></pre></div> </div> </figure> <p>It did not get one method called <code>updateReservation()</code> with a status argument. The names said which transition the caller intended. The responses included the resulting status, so a caller did not have to guess what a successful request had produced.</p>