-PormG.Configuration.load_many(["db", "db_esus"]; env="dev")</code></pre><p>The callback receives <code>(key::String, settings::Settings)</code> and must return <code>true</code> to allow the physical connection or <code>false</code> to abort.</p><p>Semantics:</p><ul><li>It runs <strong>only when a new physical connection must be opened</strong>, not on connection reuse — so a warm pool does not pay the hook cost on every query.</li><li>It runs <strong>outside the pool lock</strong>, so a slow hook (VPN bring-up, <code>sleep</code>) does not block other tasks acquiring connections.</li><li>Returning <code>false</code> aborts the acquire with a clear error naming the connection key.</li><li>When no hook is registered, connections proceed normally.</li></ul></article><nav class="docs-footer"><a class="docs-footer-prevpage" href="../setup/">« Setup</a><a class="docs-footer-nextpage" href="../server/">Server Patterns »</a><div class="flexbox-break"></div><p class="footer-message">Powered by <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> and the <a href="https://julialang.org/">Julia Programming Language</a>.</p></nav></div><div class="modal" id="documenter-settings"><div class="modal-background"></div><div class="modal-card"><header class="modal-card-head"><p class="modal-card-title">Settings</p><button class="delete"></button></header><section class="modal-card-body"><p><label class="label">Theme</label><div class="select"><select id="documenter-themepicker"><option value="auto">Automatic (OS)</option><option value="documenter-light">documenter-light</option><option value="documenter-dark">documenter-dark</option><option value="catppuccin-latte">catppuccin-latte</option><option value="catppuccin-frappe">catppuccin-frappe</option><option value="catppuccin-macchiato">catppuccin-macchiato</option><option value="catppuccin-mocha">catppuccin-mocha</option></select></div></p><hr/><p>This document was generated with <a href="https://github.com/JuliaDocs/Documenter.jl">Documenter.jl</a> version 1.17.0 on <span class="colophon-date" title="Friday 26 June 2026 18:57">Friday 26 June 2026</span>. Using Julia version 1.12.6.</p></section><footer class="modal-card-foot"></footer></div></div></div></body></html>
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