<div class="chartlet-wrapper"><style>.chartlet-stage{position:relative;display:inline-block;max-width:100%;vertical-align:top}.chartlet-stage>svg{display:block}.chartlet-hotspot{position:absolute;border-radius:8px;cursor:pointer}.chartlet-focus{margin:0 0 12px 0;font-size:13px}.chartlet-focus summary{cursor:pointer;min-height:24px}.chartlet-focus fieldset{border:none;padding:0;margin:4px 0 0 0}.chartlet-focus label{display:inline-flex;align-items:center;min-height:44px;margin-right:14px;cursor:pointer;white-space:nowrap}.chartlet-focus input{margin-right:4px}.chartlet-focus input:focus-visible{outline:2px solid #2563eb;outline-offset:2px}.chartlet-wrapper:has(.chartlet-focus-node:checked) #chartlet-19dc1aa622594b84 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class="chartlet-focus"><summary>Focus</summary><fieldset><label><input type="radio" name="chartlet-19dc1aa622594b84-focus" checked> Show all</label><label><input type="radio" name="chartlet-19dc1aa622594b84-focus" class="chartlet-focus-node" id="chartlet-19dc1aa622594b84-focus-0"> Customer</label><label><input type="radio" name="chartlet-19dc1aa622594b84-focus" class="chartlet-focus-node" id="chartlet-19dc1aa622594b84-focus-1"> Web shop</label><label><input type="radio" name="chartlet-19dc1aa622594b84-focus" class="chartlet-focus-node" id="chartlet-19dc1aa622594b84-focus-2"> Shop API</label><label><input type="radio" name="chartlet-19dc1aa622594b84-focus" class="chartlet-focus-node" id="chartlet-19dc1aa622594b84-focus-3"> Payment provider</label><label><input type="radio" name="chartlet-19dc1aa622594b84-focus" class="chartlet-focus-node" id="chartlet-19dc1aa622594b84-focus-4"> Orders</label><label><input type="radio" name="chartlet-19dc1aa622594b84-focus" class="chartlet-focus-node" id="chartlet-19dc1aa622594b84-focus-5"> Mail service</label></fieldset></details><figure class="chartlet-figure" data-viz="chart"><figcaption>Checkout: the calls in order</figcaption><div class="chartlet-stage"><svg xmlns="http://www.w3.org/2000/svg" width="900" height="640" viewBox="0 0 900 640" id="chartlet-19dc1aa622594b84" role="img" aria-labelledby="chartlet-19dc1aa622594b84-title chartlet-19dc1aa622594b84-description" class="chartlet-root"><title id="chartlet-19dc1aa622594b84-title">Checkout: the calls in order</title><desc id="chartlet-19dc1aa622594b84-description">Architecture diagram with 6 components and 5 connections. Main path: Customer → Web shop → Shop API → Orders. Most connected: Shop API (4 connections). Nothing leads into Customer. Nothing leads out of Payment provider, Orders and Mail service. Steps: 1 Customer → Web shop (confirms the cart); 2 Web shop → Shop API (places the order); 3 Shop API → Payment provider (charges); 4 Shop API → Orders (stores the order); 5 Shop API → Mail service (sends the receipt). Customer (person): connects to Web shop (step 1, confirms the cart). Web shop (frontend): connects to Shop API (step 2, places the order, via HTTPS). Shop API (service): connects to Payment provider (step 3, charges, via HTTPS), Orders (step 4, stores the order, via SQL) and Mail service (step 5, sends the receipt). Payment provider (external system): no outgoing connection. Orders (database): no outgoing connection. 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chartlet-flow-external chartlet-role-gray"><title>Mail service</title></rect><text x="599.915" y="584.3" text-anchor="middle" class="chartlet-flow-label">Mail service</text></g></svg><label class="chartlet-hotspot" id="chartlet-19dc1aa622594b84-hs-0" for="chartlet-19dc1aa622594b84-focus-0"></label><label class="chartlet-hotspot" id="chartlet-19dc1aa622594b84-hs-1" for="chartlet-19dc1aa622594b84-focus-1"></label><label class="chartlet-hotspot" id="chartlet-19dc1aa622594b84-hs-2" for="chartlet-19dc1aa622594b84-focus-2"></label><label class="chartlet-hotspot" id="chartlet-19dc1aa622594b84-hs-3" for="chartlet-19dc1aa622594b84-focus-3"></label><label class="chartlet-hotspot" id="chartlet-19dc1aa622594b84-hs-4" for="chartlet-19dc1aa622594b84-focus-4"></label><label class="chartlet-hotspot" id="chartlet-19dc1aa622594b84-hs-5" for="chartlet-19dc1aa622594b84-focus-5"></label></div><p class="chartlet-source">Source: Architecture handbook, runtime view</p><details class="chartlet-data" data-viz-text><summary>Show chart data</summary><table><caption>Data for Checkout: the calls in order</caption><thead><tr><th scope="col">Component</th><th scope="col">Kind</th><th scope="col">Connects to</th></tr></thead><tbody><tr><th scope="row">Customer</th><td>person</td><td>Web shop (step 1, confirms the cart)</td></tr><tr><th scope="row">Web shop</th><td>frontend</td><td>Shop API (step 2, places the order, via HTTPS)</td></tr><tr><th scope="row">Shop API</th><td>service</td><td>Payment provider (step 3, charges, via HTTPS), Orders (step 4, stores the order, via SQL), Mail service (step 5, sends the receipt)</td></tr><tr><th scope="row">Payment provider</th><td>external system</td><td></td></tr><tr><th scope="row">Orders</th><td>database</td><td></td></tr><tr><th scope="row">Mail service</th><td>external system</td><td></td></tr></tbody></table></details></figure></div>