| <!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 `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/tower-0.4.13/src/make/make_service.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>make_service.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../tower/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../tower/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" 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="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="doccomment">//! Contains [`MakeService`] which is a trait alias for a [`Service`] of [`Service`]s. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::sealed::Sealed; |
| <span class="kw">use </span>std::fmt; |
| <span class="kw">use </span>std::future::Future; |
| <span class="kw">use </span>std::marker::PhantomData; |
| <span class="kw">use </span>std::task::{Context, Poll}; |
| <span class="kw">use </span>tower_service::Service; |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">mod </span>shared; |
| |
| <span class="doccomment">/// Creates new [`Service`] values. |
| /// |
| /// Acts as a service factory. This is useful for cases where new [`Service`] |
| /// values must be produced. One case is a TCP server listener. The listener |
| /// accepts new TCP streams, obtains a new [`Service`] value using the |
| /// [`MakeService`] trait, and uses that new [`Service`] value to process inbound |
| /// requests on that new TCP stream. |
| /// |
| /// This is essentially a trait alias for a [`Service`] of [`Service`]s. |
| </span><span class="kw">pub trait </span>MakeService<Target, Request>: Sealed<(Target, Request)> { |
| <span class="doccomment">/// Responses given by the service |
| </span><span class="kw">type </span>Response; |
| |
| <span class="doccomment">/// Errors produced by the service |
| </span><span class="kw">type </span>Error; |
| |
| <span class="doccomment">/// The [`Service`] value created by this factory |
| </span><span class="kw">type </span>Service: Service<Request, Response = <span class="self">Self</span>::Response, Error = <span class="self">Self</span>::Error>; |
| |
| <span class="doccomment">/// Errors produced while building a service. |
| </span><span class="kw">type </span>MakeError; |
| |
| <span class="doccomment">/// The future of the [`Service`] instance. |
| </span><span class="kw">type </span>Future: Future<Output = <span class="prelude-ty">Result</span><<span class="self">Self</span>::Service, <span class="self">Self</span>::MakeError>>; |
| |
| <span class="doccomment">/// Returns [`Poll::Ready`] when the factory is able to create more services. |
| /// |
| /// If the service is at capacity, then [`Poll::Pending`] is returned and the task |
| /// is notified when the service becomes ready again. This function is |
| /// expected to be called while on a task. |
| /// |
| /// [`Poll::Ready`]: std::task::Poll::Ready |
| /// [`Poll::Pending`]: std::task::Poll::Pending |
| </span><span class="kw">fn </span>poll_ready(<span class="kw-2">&mut </span><span class="self">self</span>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="prelude-ty">Result</span><(), <span class="self">Self</span>::MakeError>>; |
| |
| <span class="doccomment">/// Create and return a new service value asynchronously. |
| </span><span class="kw">fn </span>make_service(<span class="kw-2">&mut </span><span class="self">self</span>, target: Target) -> <span class="self">Self</span>::Future; |
| |
| <span class="doccomment">/// Consume this [`MakeService`] and convert it into a [`Service`]. |
| /// |
| /// # Example |
| /// ``` |
| /// use std::convert::Infallible; |
| /// use tower::Service; |
| /// use tower::make::MakeService; |
| /// use tower::service_fn; |
| /// |
| /// # fn main() { |
| /// # async { |
| /// // A `MakeService` |
| /// let make_service = service_fn(|make_req: ()| async { |
| /// Ok::<_, Infallible>(service_fn(|req: String| async { |
| /// Ok::<_, Infallible>(req) |
| /// })) |
| /// }); |
| /// |
| /// // Convert the `MakeService` into a `Service` |
| /// let mut svc = make_service.into_service(); |
| /// |
| /// // Make a new service |
| /// let mut new_svc = svc.call(()).await.unwrap(); |
| /// |
| /// // Call the service |
| /// let res = new_svc.call("foo".to_string()).await.unwrap(); |
| /// # }; |
| /// # } |
| /// ``` |
| </span><span class="kw">fn </span>into_service(<span class="self">self</span>) -> IntoService<<span class="self">Self</span>, Request> |
| <span class="kw">where |
| </span><span class="self">Self</span>: Sized, |
| { |
| IntoService { |
| make: <span class="self">self</span>, |
| _marker: PhantomData, |
| } |
| } |
| |
| <span class="doccomment">/// Convert this [`MakeService`] into a [`Service`] without consuming the original [`MakeService`]. |
| /// |
| /// # Example |
| /// ``` |
| /// use std::convert::Infallible; |
| /// use tower::Service; |
| /// use tower::make::MakeService; |
| /// use tower::service_fn; |
| /// |
| /// # fn main() { |
| /// # async { |
| /// // A `MakeService` |
| /// let mut make_service = service_fn(|make_req: ()| async { |
| /// Ok::<_, Infallible>(service_fn(|req: String| async { |
| /// Ok::<_, Infallible>(req) |
| /// })) |
| /// }); |
| /// |
| /// // Convert the `MakeService` into a `Service` |
| /// let mut svc = make_service.as_service(); |
| /// |
| /// // Make a new service |
| /// let mut new_svc = svc.call(()).await.unwrap(); |
| /// |
| /// // Call the service |
| /// let res = new_svc.call("foo".to_string()).await.unwrap(); |
| /// |
| /// // The original `MakeService` is still accessible |
| /// let new_svc = make_service.make_service(()).await.unwrap(); |
| /// # }; |
| /// # } |
| /// ``` |
| </span><span class="kw">fn </span>as_service(<span class="kw-2">&mut </span><span class="self">self</span>) -> AsService<<span class="self">Self</span>, Request> |
| <span class="kw">where |
| </span><span class="self">Self</span>: Sized, |
| { |
| AsService { |
| make: <span class="self">self</span>, |
| _marker: PhantomData, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><M, S, Target, Request> Sealed<(Target, Request)> <span class="kw">for </span>M |
| <span class="kw">where |
| </span>M: Service<Target, Response = S>, |
| S: Service<Request>, |
| { |
| } |
| |
| <span class="kw">impl</span><M, S, Target, Request> MakeService<Target, Request> <span class="kw">for </span>M |
| <span class="kw">where |
| </span>M: Service<Target, Response = S>, |
| S: Service<Request>, |
| { |
| <span class="kw">type </span>Response = S::Response; |
| <span class="kw">type </span>Error = S::Error; |
| <span class="kw">type </span>Service = S; |
| <span class="kw">type </span>MakeError = M::Error; |
| <span class="kw">type </span>Future = M::Future; |
| |
| <span class="kw">fn </span>poll_ready(<span class="kw-2">&mut </span><span class="self">self</span>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="prelude-ty">Result</span><(), <span class="self">Self</span>::MakeError>> { |
| Service::poll_ready(<span class="self">self</span>, cx) |
| } |
| |
| <span class="kw">fn </span>make_service(<span class="kw-2">&mut </span><span class="self">self</span>, target: Target) -> <span class="self">Self</span>::Future { |
| Service::call(<span class="self">self</span>, target) |
| } |
| } |
| |
| <span class="doccomment">/// Service returned by [`MakeService::into_service`][into]. |
| /// |
| /// See the documentation on [`into_service`][into] for details. |
| /// |
| /// [into]: MakeService::into_service |
| </span><span class="kw">pub struct </span>IntoService<M, Request> { |
| make: M, |
| _marker: PhantomData<Request>, |
| } |
| |
| <span class="kw">impl</span><M, Request> Clone <span class="kw">for </span>IntoService<M, Request> |
| <span class="kw">where |
| </span>M: Clone, |
| { |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ |
| make: <span class="self">self</span>.make.clone(), |
| _marker: PhantomData, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><M, Request> fmt::Debug <span class="kw">for </span>IntoService<M, Request> |
| <span class="kw">where |
| </span>M: fmt::Debug, |
| { |
| <span class="kw">fn </span>fmt(<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 { |
| f.debug_struct(<span class="string">"IntoService"</span>) |
| .field(<span class="string">"make"</span>, <span class="kw-2">&</span><span class="self">self</span>.make) |
| .finish() |
| } |
| } |
| |
| <span class="kw">impl</span><M, S, Target, Request> Service<Target> <span class="kw">for </span>IntoService<M, Request> |
| <span class="kw">where |
| </span>M: Service<Target, Response = S>, |
| S: Service<Request>, |
| { |
| <span class="kw">type </span>Response = M::Response; |
| <span class="kw">type </span>Error = M::Error; |
| <span class="kw">type </span>Future = M::Future; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>poll_ready(<span class="kw-2">&mut </span><span class="self">self</span>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="prelude-ty">Result</span><(), <span class="self">Self</span>::Error>> { |
| <span class="self">self</span>.make.poll_ready(cx) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>call(<span class="kw-2">&mut </span><span class="self">self</span>, target: Target) -> <span class="self">Self</span>::Future { |
| <span class="self">self</span>.make.make_service(target) |
| } |
| } |
| |
| <span class="doccomment">/// Service returned by [`MakeService::as_service`][as]. |
| /// |
| /// See the documentation on [`as_service`][as] for details. |
| /// |
| /// [as]: MakeService::as_service |
| </span><span class="kw">pub struct </span>AsService<<span class="lifetime">'a</span>, M, Request> { |
| make: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>M, |
| _marker: PhantomData<Request>, |
| } |
| |
| <span class="kw">impl</span><M, Request> fmt::Debug <span class="kw">for </span>AsService<<span class="lifetime">'_</span>, M, Request> |
| <span class="kw">where |
| </span>M: fmt::Debug, |
| { |
| <span class="kw">fn </span>fmt(<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 { |
| f.debug_struct(<span class="string">"AsService"</span>) |
| .field(<span class="string">"make"</span>, <span class="kw-2">&</span><span class="self">self</span>.make) |
| .finish() |
| } |
| } |
| |
| <span class="kw">impl</span><M, S, Target, Request> Service<Target> <span class="kw">for </span>AsService<<span class="lifetime">'_</span>, M, Request> |
| <span class="kw">where |
| </span>M: Service<Target, Response = S>, |
| S: Service<Request>, |
| { |
| <span class="kw">type </span>Response = M::Response; |
| <span class="kw">type </span>Error = M::Error; |
| <span class="kw">type </span>Future = M::Future; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>poll_ready(<span class="kw-2">&mut </span><span class="self">self</span>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="prelude-ty">Result</span><(), <span class="self">Self</span>::Error>> { |
| <span class="self">self</span>.make.poll_ready(cx) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>call(<span class="kw-2">&mut </span><span class="self">self</span>, target: Target) -> <span class="self">Self</span>::Future { |
| <span class="self">self</span>.make.make_service(target) |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="tower" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
