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implemented 09-system-metrics.md: added system metrics: introduced system monitoring with a metrics collector, REST API endpoint, Thymeleaf UI rendering, and lifecycle management

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Michael Hoennig
2026-07-07 12:55:11 +02:00
parent 67c9f0ade9
commit a6a2c9de0b
21 changed files with 1069 additions and 6 deletions
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src/main/resources/templates/fragments.html
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@@ -25,6 +25,8 @@
<a th:unless="${view == 'history'}" href="/history">History</a>
<span th:if="${view == 'current'}">Current</span>
<a th:unless="${view == 'current'}" href="/current">Current</a>
<span th:if="${view == 'system'}">System</span>
<a th:unless="${view == 'system'}" href="/system">System</a>
</nav>
<span class="view-row-actions">
<span id="live-indicator" class="status status-unknown" title="live-update state">static</span>
src/main/resources/templates/system.html
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@@ -0,0 +1,44 @@
<!doctype html>
<html xmlns:th="http://www.thymeleaf.org" lang="en">
<head th:replace="~{fragments :: head(${pageTitle})}"></head>
<body>
<main>
<h1 th:replace="~{fragments :: header(${pageTitle})}"></h1>
<div th:replace="~{fragments :: nav(${view})}"></div>
<div class="table-wrap">
<table id="system-table" data-api="/api/system">
<thead>
<tr>
<th>Metric</th>
<th class="num">Current</th>
<th class="num">Min</th>
<th class="num">Max</th>
<th class="num">Avg</th>
</tr>
</thead>
<tbody id="system-rows">
<tr th:each="row : ${metrics.rows}" th:attr="data-metric=${row.key}">
<td data-label="Metric" th:text="${row.label}">CPU used (cores)</td>
<td class="num" data-label="Current" data-field="current" th:text="${row.current}">0.42</td>
<td class="num" data-label="Min" data-field="min" th:text="${row.min}">0.10</td>
<td class="num" data-label="Max" data-field="max" th:text="${row.max}">3.20</td>
<td class="num" data-label="Avg" data-field="avg" th:text="${row.avg}">0.80</td>
</tr>
</tbody>
</table>
</div>
<p class="meta">
<span>
CPU total: <strong id="info-cpu-count" th:text="${metrics.cpuCount}">8 cores</strong>
&nbsp;·&nbsp; RAM total: <strong id="info-ram-total" th:text="${metrics.ramTotal}">31.29 GiB</strong>
&nbsp;·&nbsp; Disk total: <strong id="info-disk-total" th:text="${metrics.diskTotal}">465.12 GiB</strong>
&nbsp;·&nbsp; Updated: <span id="info-updated" th:text="${metrics.updated}">12:00:00</span>
(updated every 60s)
</span>
<span>(*: min/max/avg since the first server start)</span>
</p>
</main>
<footer th:replace="~{fragments :: footer}"></footer>
<script src="/gittally.js"></script>
</body>
</html>