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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `actix-settings/src/settings/backlog.rs`."><title>backlog.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/SourceSerif4-Bold-a2c9cd1067f8b328.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../../static.files/rustdoc-deb46770fd761b69.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="actix_settings" data-themes="" data-resource-suffix="" data-rustdoc-version="1.75.0-nightly (475c71da0 2023-10-11)" data-channel="nightly" data-search-js="search-8fbf244ebcf71464.js" data-settings-js="settings-74424d7eec62a23e.js" ><script src="../../../static.files/storage-fec3eaa3851e447d.js"></script><script defer src="../../../static.files/src-script-3280b574d94e47b4.js"></script><script defer src="../../../src-files.js"></script><script defer src="../../../static.files/main-5f34af1a0ee6bacd.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-5d8b3c7633ad77ba.css"></noscript><link rel="icon" href="https://actix.rs/favicon.ico"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"></nav><main><nav class="sub"><a class="sub-logo-container" href="../../../actix_settings/index.html"><img src="https://actix.rs/img/logo.png" alt="actix_settings"></a><form class="search-form"><span></span><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><div data-nosnippet><pre class="src-line-numbers"><a href="#1" id="1">1</a>
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</pre></div><pre class="rust"><code><span class="kw">use </span>std::fmt;
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<span class="kw">use </span>serde::de;
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<span class="kw">use crate</span>::{AsResult, Error, Parse};
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<span class="doccomment">/// The maximum number of pending connections.
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///
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/// This refers to the number of clients that can be waiting to be served. Exceeding this number
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/// results in the client getting an error when attempting to connect. It should only affect servers
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/// under significant load.
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///
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/// Generally set in the 64–2048 range. The default value is 2048. Takes a string value: Either
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/// "default", or an integer N > 0 e.g. "6".
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</span><span class="attr">#[derive(Debug, Clone, PartialEq, Eq, Hash)]
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</span><span class="kw">pub enum </span>Backlog {
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<span class="doccomment">/// The default number of connections. See struct docs.
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</span>Default,
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<span class="doccomment">/// A specific number of connections.
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</span>Manual(usize),
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}
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<span class="kw">impl </span>Parse <span class="kw">for </span>Backlog {
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<span class="kw">fn </span>parse(string: <span class="kw-2">&</span>str) -> AsResult<<span class="self">Self</span>> {
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<span class="kw">match </span>string {
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<span class="string">"default" </span>=> <span class="prelude-val">Ok</span>(Backlog::Default),
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string => <span class="kw">match </span>string.parse::<usize>() {
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<span class="prelude-val">Ok</span>(val) => <span class="prelude-val">Ok</span>(Backlog::Manual(val)),
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<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="prelude-val">Err</span>(<span class="macro">InvalidValue! </span>{
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expected: <span class="string">"an integer > 0"</span>,
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got: string,
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}),
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},
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}
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}
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}
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<span class="kw">impl</span><<span class="lifetime">'de</span>> de::Deserialize<<span class="lifetime">'de</span>> <span class="kw">for </span>Backlog {
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<span class="kw">fn </span>deserialize<D>(deserializer: D) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, D::Error>
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<span class="kw">where
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</span>D: de::Deserializer<<span class="lifetime">'de</span>>,
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{
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<span class="kw">struct </span>BacklogVisitor;
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<span class="kw">impl</span><<span class="lifetime">'de</span>> de::Visitor<<span class="lifetime">'de</span>> <span class="kw">for </span>BacklogVisitor {
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<span class="kw">type </span>Value = Backlog;
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<span class="kw">fn </span>expecting(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result {
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<span class="kw">let </span>msg = <span class="string">"Either \"default\" or a string containing an integer > 0"</span>;
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f.write_str(msg)
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}
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<span class="kw">fn </span>visit_str<E>(<span class="self">self</span>, value: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>::Value, E>
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<span class="kw">where
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</span>E: de::Error,
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{
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<span class="kw">match </span>Backlog::parse(value) {
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<span class="prelude-val">Ok</span>(backlog) => <span class="prelude-val">Ok</span>(backlog),
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<span class="prelude-val">Err</span>(Error::InvalidValue { expected, got, .. }) => <span class="prelude-val">Err</span>(
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de::Error::invalid_value(de::Unexpected::Str(<span class="kw-2">&</span>got), <span class="kw-2">&</span>expected),
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),
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<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="macro">unreachable!</span>(),
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}
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}
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}
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deserializer.deserialize_string(BacklogVisitor)
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}
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}
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</code></pre></div></section></main></body></html> |