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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="API documentation for the Rust `run` fn in crate `actix_web`."><meta name="keywords" content="rust, rustlang, rust-lang, run"><title>actix_web::actix::run - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script></head><body class="rustdoc fn"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><div class="sidebar-elems"><p class='location'><a href='../index.html'>actix_web</a>::<wbr><a href='index.html'>actix</a></p><script>window.sidebarCurrent = {name: 'run', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span></span><span class='in-band'>Function <a href='../index.html'>actix_web</a>::<wbr><a href='index.html'>actix</a>::<wbr><a class="fn" href=''>run</a></span></h1><pre class='rust fn'>pub fn run<F, R>(f: F) <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() -> R,<br> R: <a class="trait" href="https://docs.rs/futures/0.1/futures/future/trait.Future.html" title="trait futures::future::Future">Future</a><Item = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Error = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>> + 'static, </span></pre><div class='docblock'><p>Start the System and execute supplied future.</p>
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<p>This function does the following:</p>
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<ul>
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<li>Creates and starts actix System with default configuration.</li>
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<li>Spawn the given future onto the current arbiter.</li>
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<li>Block the current thread until the system shuts down.</li>
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</ul>
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<p><code>run</code> functions returns when <code>System::current().stop()</code> method get called.</p>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">time</span>::{<span class="ident">Duration</span>, <span class="ident">Instant</span>};
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<span class="kw">use</span> <span class="ident">tokio_timer</span>::<span class="ident">Delay</span>;
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<span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="ident">actix</span>::<span class="ident">run</span>(
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<span class="op">||</span> <span class="ident">Delay</span>::<span class="ident">new</span>(<span class="ident">Instant</span>::<span class="ident">now</span>() <span class="op">+</span> <span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="number">100</span>))
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.<span class="ident">map</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="ident">actix</span>::<span class="ident">System</span>::<span class="ident">current</span>().<span class="ident">stop</span>())
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.<span class="ident">map_err</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> ())
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);
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}</pre>
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<h1 id="panics" class="section-header"><a href="#panics">Panics</a></h1>
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<p>This function panics if actix system is already running.</p>
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