| <!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="Drives readiness over a set of services."><meta name="keywords" content="rust, rustlang, rust-lang, ReadyCache"><title>ReadyCache in tower::ready_cache::cache - Rust</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 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class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../../tower/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a><h2></h2></nav><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><h2 class="location"><a href="#">ReadyCache</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block"><li><a href="#method.call_ready">call_ready</a></li><li><a href="#method.call_ready_index">call_ready_index</a></li><li><a href="#method.check_ready">check_ready</a></li><li><a href="#method.check_ready_index">check_ready_index</a></li><li><a href="#method.evict">evict</a></li><li><a href="#method.get_ready">get_ready</a></li><li><a href="#method.get_ready_index">get_ready_index</a></li><li><a href="#method.get_ready_index_mut">get_ready_index_mut</a></li><li><a href="#method.get_ready_mut">get_ready_mut</a></li><li><a href="#method.is_empty">is_empty</a></li><li><a href="#method.len">len</a></li><li><a href="#method.pending_contains">pending_contains</a></li><li><a href="#method.pending_len">pending_len</a></li><li><a href="#method.poll_pending">poll_pending</a></li><li><a href="#method.push">push</a></li><li><a href="#method.ready_len">ready_len</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block"><li><a href="#impl-Debug-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">Debug</a></li><li><a href="#impl-Default-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">Default</a></li><li><a href="#impl-Unpin-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">Unpin</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block"><li><a href="#impl-RefUnwindSafe-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">!RefUnwindSafe</a></li><li><a href="#impl-Send-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">Send</a></li><li><a href="#impl-Sync-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">Sync</a></li><li><a href="#impl-UnwindSafe-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">!UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block"><li><a href="#impl-Any-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">From<T></a></li><li><a href="#impl-Instrument-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">Instrument</a></li><li><a href="#impl-Into%3CU%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">Into<U></a></li><li><a href="#impl-TryFrom%3CU%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">TryInto<U></a></li><li><a href="#impl-VZip%3CV%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">VZip<V></a></li><li><a href="#impl-WithSubscriber-for-ReadyCache%3CK%2C%20S%2C%20Req%3E">WithSubscriber</a></li></ul></section><h2><a href="index.html">In tower::ready_cache::cache</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><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="main-heading"><h1 class="fqn">Struct <a href="../../index.html">tower</a>::<wbr><a href="../index.html">ready_cache</a>::<wbr><a href="index.html">cache</a>::<wbr><a class="struct" href="#">ReadyCache</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="srclink" href="../../../src/tower/ready_cache/cache.rs.html#58-74">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="item-decl"><pre class="rust struct"><code>pub struct ReadyCache<K, S, Req><span class="where fmt-newline">where<br> K: Eq + Hash,</span>{ /* private fields */ }</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Drives readiness over a set of services.</p> |
| <p>The cache maintains two internal data structures:</p> |
| <ul> |
| <li>a set of <em>pending</em> services that have not yet become ready; and</li> |
| <li>a set of <em>ready</em> services that have previously polled ready.</li> |
| </ul> |
| <p>As each <code>S</code> typed <a href="../../trait.Service.html" title="Service"><code>Service</code></a> is added to the cache via <a href="struct.ReadyCache.html#method.push" title="ReadyCache::push"><code>ReadyCache::push</code></a>, it |
| is added to the <em>pending set</em>. As <a href="struct.ReadyCache.html#method.poll_pending" title="ReadyCache::poll_pending"><code>ReadyCache::poll_pending</code></a> is invoked, |
| pending services are polled and added to the <em>ready set</em>.</p> |
| <p><a href="struct.ReadyCache.html#method.call_ready" title="ReadyCache::call_ready"><code>ReadyCache::call_ready</code></a> (or <a href="struct.ReadyCache.html#method.call_ready_index" title="ReadyCache::call_ready_index"><code>ReadyCache::call_ready_index</code></a>) dispatches a |
| request to the specified service, but panics if the specified service is not |
| in the ready set. The <code>ReadyCache::check_*</code> functions can be used to ensure |
| that a service is ready before dispatching a request.</p> |
| <p>The ready set can hold services for an abitrarily long time. During this |
| time, the runtime may process events that invalidate that ready state (for |
| instance, if a keepalive detects a lost connection). In such cases, callers |
| should use <a href="struct.ReadyCache.html#method.check_ready" title="ReadyCache::check_ready"><code>ReadyCache::check_ready</code></a> (or <a href="struct.ReadyCache.html#method.check_ready_index" title="ReadyCache::check_ready_index"><code>ReadyCache::check_ready_index</code></a>) |
| immediately before dispatching a request to ensure that the service has not |
| become unavailable.</p> |
| <p>Once <code>ReadyCache::call_ready*</code> is invoked, the service is placed back into |
| the <em>pending</em> set to be driven to readiness again.</p> |
| <p>When <code>ReadyCache::check_ready*</code> returns <code>false</code>, it indicates that the |
| specified service is <em>not</em> ready. If an error is returned, this indicats that |
| the server failed and has been removed from the cache entirely.</p> |
| <p><a href="struct.ReadyCache.html#method.evict" title="ReadyCache::evict"><code>ReadyCache::evict</code></a> can be used to remove a service from the cache (by key), |
| though the service may not be dropped (if it is currently pending) until |
| <a href="struct.ReadyCache.html#method.poll_pending" title="ReadyCache::poll_pending"><code>ReadyCache::poll_pending</code></a> is invoked.</p> |
| <p>Note that the by-index accessors are provided to support use cases (like |
| power-of-two-choices load balancing) where the caller does not care to keep |
| track of each service’s key. Instead, it needs only to access <em>some</em> ready |
| service. In such a case, it should be noted that calls to |
| <a href="struct.ReadyCache.html#method.poll_pending" title="ReadyCache::poll_pending"><code>ReadyCache::poll_pending</code></a> and <a href="struct.ReadyCache.html#method.evict" title="ReadyCache::evict"><code>ReadyCache::evict</code></a> may perturb the order of |
| the ready set, so any cached indexes should be discarded after such a call.</p> |
| </div></details><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><div id="implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#146-220">source</a><a href="#impl-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<K, S, Req> <a class="struct" href="struct.ReadyCache.html" title="struct tower::ready_cache::cache::ReadyCache">ReadyCache</a><K, S, Req><span class="where fmt-newline">where<br> K: Eq + Hash,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.len" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#151-153">source</a><h4 class="code-header">pub fn <a href="#method.len" class="fnname">len</a>(&self) -> usize</h4></section></summary><div class="docblock"><p>Returns the total number of services in the cache.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.is_empty" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#156-158">source</a><h4 class="code-header">pub fn <a href="#method.is_empty" class="fnname">is_empty</a>(&self) -> bool</h4></section></summary><div class="docblock"><p>Returns whether or not there are any services in the cache.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.ready_len" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#161-163">source</a><h4 class="code-header">pub fn <a href="#method.ready_len" class="fnname">ready_len</a>(&self) -> usize</h4></section></summary><div class="docblock"><p>Returns the number of services in the ready set.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.pending_len" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#166-168">source</a><h4 class="code-header">pub fn <a href="#method.pending_len" class="fnname">pending_len</a>(&self) -> usize</h4></section></summary><div class="docblock"><p>Returns the number of services in the unready set.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.pending_contains" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#171-173">source</a><h4 class="code-header">pub fn <a href="#method.pending_contains" class="fnname">pending_contains</a><Q: Hash + <a class="trait" href="trait.Equivalent.html" title="trait tower::ready_cache::cache::Equivalent">Equivalent</a><K>>(&self, key: &Q) -> bool</h4></section></summary><div class="docblock"><p>Returns true iff the given key is in the unready set.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get_ready" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#176-178">source</a><h4 class="code-header">pub fn <a href="#method.get_ready" class="fnname">get_ready</a><Q: Hash + <a class="trait" href="trait.Equivalent.html" title="trait tower::ready_cache::cache::Equivalent">Equivalent</a><K>>(<br> &self,<br> key: &Q<br>) -> Option<(usize, &K, &S)></h4></section></summary><div class="docblock"><p>Obtains a reference to a service in the ready set by key.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get_ready_mut" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#181-188">source</a><h4 class="code-header">pub fn <a href="#method.get_ready_mut" class="fnname">get_ready_mut</a><Q: Hash + <a class="trait" href="trait.Equivalent.html" title="trait tower::ready_cache::cache::Equivalent">Equivalent</a><K>>(<br> &mut self,<br> key: &Q<br>) -> Option<(usize, &K, &mut S)></h4></section></summary><div class="docblock"><p>Obtains a mutable reference to a service in the ready set by key.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get_ready_index" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#191-193">source</a><h4 class="code-header">pub fn <a href="#method.get_ready_index" class="fnname">get_ready_index</a>(&self, idx: usize) -> Option<(&K, &S)></h4></section></summary><div class="docblock"><p>Obtains a reference to a service in the ready set by index.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get_ready_index_mut" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#196-198">source</a><h4 class="code-header">pub fn <a href="#method.get_ready_index_mut" class="fnname">get_ready_index_mut</a>(&mut self, idx: usize) -> Option<(&mut K, &mut S)></h4></section></summary><div class="docblock"><p>Obtains a mutable reference to a service in the ready set by index.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.evict" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#207-219">source</a><h4 class="code-header">pub fn <a href="#method.evict" class="fnname">evict</a><Q: Hash + <a class="trait" href="trait.Equivalent.html" title="trait tower::ready_cache::cache::Equivalent">Equivalent</a><K>>(&mut self, key: &Q) -> bool</h4></section></summary><div class="docblock"><p>Evicts an item from the cache.</p> |
| <p>Returns true if a service was marked for eviction.</p> |
| <p>Services are dropped from the ready set immediately. Services in the |
| pending set are marked for cancellation, but <a href="struct.ReadyCache.html#method.poll_pending" title="ReadyCache::poll_pending"><code>ReadyCache::poll_pending</code></a> |
| must be called to cause the service to be dropped.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-ReadyCache%3CK%2C%20S%2C%20Req%3E-1" class="impl has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#222-399">source</a><a href="#impl-ReadyCache%3CK%2C%20S%2C%20Req%3E-1" class="anchor"></a><h3 class="code-header">impl<K, S, Req> <a class="struct" href="struct.ReadyCache.html" title="struct tower::ready_cache::cache::ReadyCache">ReadyCache</a><K, S, Req><span class="where fmt-newline">where<br> K: Clone + Eq + Hash,<br> S: <a class="trait" href="../../trait.Service.html" title="trait tower::Service">Service</a><Req>,<br> <S as <a class="trait" href="../../trait.Service.html" title="trait tower::Service">Service</a><Req>>::<a class="associatedtype" href="../../trait.Service.html#associatedtype.Error" title="type tower::Service::Error">Error</a>: Into<<a class="type" href="../../type.BoxError.html" title="type tower::BoxError">BoxError</a>>,<br> S::<a class="associatedtype" href="../../trait.Service.html#associatedtype.Error" title="type tower::Service::Error">Error</a>: Into<<a class="type" href="../../type.BoxError.html" title="type tower::BoxError">BoxError</a>>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.push" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#239-242">source</a><h4 class="code-header">pub fn <a href="#method.push" class="fnname">push</a>(&mut self, key: K, svc: S)</h4></section></summary><div class="docblock"><p>Pushes a new service onto the pending set.</p> |
| <p>The service will be promoted to the ready set as <a href="struct.ReadyCache.html#method.poll_pending"><code>poll_pending</code></a> is invoked.</p> |
| <p>Note that this does <strong>not</strong> remove services from the ready set. Once the |
| old service is used, it will be dropped instead of being added back to |
| the pending set; OR, when the new service becomes ready, it will replace |
| the prior service in the ready set.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.poll_pending" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#271-305">source</a><h4 class="code-header">pub fn <a href="#method.poll_pending" class="fnname">poll_pending</a>(<br> &mut self,<br> cx: &mut Context<'_><br>) -> Poll<Result<(), <a class="struct" href="../error/struct.Failed.html" title="struct tower::ready_cache::error::Failed">Failed</a><K>>></h4></section></summary><div class="docblock"><p>Polls services pending readiness, adding ready services to the ready set.</p> |
| <p>Returns [<code>Poll::Ready</code>] when there are no remaining unready services. |
| <a href="struct.ReadyCache.html#method.poll_pending"><code>poll_pending</code></a> should be called again after <a href="struct.ReadyCache.html#method.push"><code>push</code></a> or |
| <a href="struct.ReadyCache.html#method.call_ready_index"><code>call_ready_index</code></a> are invoked.</p> |
| <p>Failures indicate that an individual pending service failed to become |
| ready (and has been removed from the cache). In such a case, |
| <a href="struct.ReadyCache.html#method.poll_pending"><code>poll_pending</code></a> should typically be called again to continue driving |
| pending services to readiness.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.check_ready" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#311-320">source</a><h4 class="code-header">pub fn <a href="#method.check_ready" class="fnname">check_ready</a><Q: Hash + <a class="trait" href="trait.Equivalent.html" title="trait tower::ready_cache::cache::Equivalent">Equivalent</a><K>>(<br> &mut self,<br> cx: &mut Context<'_>,<br> key: &Q<br>) -> Result<bool, <a class="struct" href="../error/struct.Failed.html" title="struct tower::ready_cache::error::Failed">Failed</a><K>></h4></section></summary><div class="docblock"><p>Checks whether the referenced endpoint is ready.</p> |
| <p>Returns true if the endpoint is ready and false if it is not. An error is |
| returned if the endpoint fails.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.check_ready_index" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#328-363">source</a><h4 class="code-header">pub fn <a href="#method.check_ready_index" class="fnname">check_ready_index</a>(<br> &mut self,<br> cx: &mut Context<'_>,<br> index: usize<br>) -> Result<bool, <a class="struct" href="../error/struct.Failed.html" title="struct tower::ready_cache::error::Failed">Failed</a><K>></h4></section></summary><div class="docblock"><p>Checks whether the referenced endpoint is ready.</p> |
| <p>If the service is no longer ready, it is moved back into the pending set |
| and <code>false</code> is returned.</p> |
| <p>If the service errors, it is removed and dropped and the error is returned.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.call_ready" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#370-376">source</a><h4 class="code-header">pub fn <a href="#method.call_ready" class="fnname">call_ready</a><Q: Hash + <a class="trait" href="trait.Equivalent.html" title="trait tower::ready_cache::cache::Equivalent">Equivalent</a><K>>(<br> &mut self,<br> key: &Q,<br> req: Req<br>) -> S::<a class="associatedtype" href="../../trait.Service.html#associatedtype.Future" title="type tower::Service::Future">Future</a></h4></section></summary><div class="docblock"><p>Calls a ready service by key.</p> |
| <h5 id="panics"><a href="#panics">Panics</a></h5> |
| <p>If the specified key does not exist in the ready</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.call_ready_index" class="method has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#383-398">source</a><h4 class="code-header">pub fn <a href="#method.call_ready_index" class="fnname">call_ready_index</a>(&mut self, index: usize, req: Req) -> S::<a class="associatedtype" href="../../trait.Service.html#associatedtype.Future" title="type tower::Service::Future">Future</a></h4></section></summary><div class="docblock"><p>Calls a ready service by index.</p> |
| <h5 id="panics-1"><a href="#panics-1">Panics</a></h5> |
| <p>If the specified index is out of range.</p> |
| </div></details></div></details></div><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Debug-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#127-144">source</a><a href="#impl-Debug-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<K, S, Req> Debug for <a class="struct" href="struct.ReadyCache.html" title="struct tower::ready_cache::cache::ReadyCache">ReadyCache</a><K, S, Req><span class="where fmt-newline">where<br> K: Debug + Eq + Hash,<br> S: Debug,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#132-143">source</a><a href="#method.fmt" class="anchor"></a><h4 class="code-header">fn <a class="fnname">fmt</a>(&self, f: &mut Formatter<'_>) -> Result</h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Default-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#113-125">source</a><a href="#impl-Default-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<K, S, Req> Default for <a class="struct" href="struct.ReadyCache.html" title="struct tower::ready_cache::cache::ReadyCache">ReadyCache</a><K, S, Req><span class="where fmt-newline">where<br> K: Eq + Hash,<br> S: <a class="trait" href="../../trait.Service.html" title="trait tower::Service">Service</a><Req>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.default" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#118-124">source</a><a href="#method.default" class="anchor"></a><h4 class="code-header">fn <a class="fnname">default</a>() -> Self</h4></section></summary><div class='docblock'>Returns the “default value” for a type. <a>Read more</a></div></details></div></details><section id="impl-Unpin-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a class="srclink rightside" href="../../../src/tower/ready_cache/cache.rs.html#77">source</a><a href="#impl-Unpin-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<S, K: Eq + Hash, Req> Unpin for <a class="struct" href="struct.ReadyCache.html" title="struct tower::ready_cache::cache::ReadyCache">ReadyCache</a><K, S, Req></h3></section></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor"></a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<K, S, Req> !RefUnwindSafe for <a class="struct" href="struct.ReadyCache.html" title="struct tower::ready_cache::cache::ReadyCache">ReadyCache</a><K, S, Req></h3></section><section id="impl-Send-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a href="#impl-Send-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<K, S, Req> Send for <a class="struct" href="struct.ReadyCache.html" title="struct tower::ready_cache::cache::ReadyCache">ReadyCache</a><K, S, Req><span class="where fmt-newline">where<br> K: Send,<br> Req: Send,<br> S: Send,</span></h3></section><section id="impl-Sync-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a href="#impl-Sync-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<K, S, Req> Sync for <a class="struct" href="struct.ReadyCache.html" title="struct tower::ready_cache::cache::ReadyCache">ReadyCache</a><K, S, Req><span class="where fmt-newline">where<br> K: Sync,<br> Req: Sync,<br> S: Sync,</span></h3></section><section id="impl-UnwindSafe-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a href="#impl-UnwindSafe-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<K, S, Req> !UnwindSafe for <a class="struct" href="struct.ReadyCache.html" title="struct tower::ready_cache::cache::ReadyCache">ReadyCache</a><K, S, Req></h3></section></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Any-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a href="#impl-Any-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<T> Any for T<span class="where fmt-newline">where<br> T: 'static + ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl has-srclink"><a href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a class="fnname">type_id</a>(&self) -> TypeId</h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a href="#impl-Borrow%3CT%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<T> Borrow<T> for T<span class="where fmt-newline">where<br> T: ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow</a>(&self) -> &T</h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a href="#impl-BorrowMut%3CT%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<T> BorrowMut<T> for T<span class="where fmt-newline">where<br> T: ?Sized,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow_mut</a>(&mut self) -> &mut T</h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a href="#impl-From%3CT%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<T> From<T> for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Instrument-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a class="srclink rightside" href="../../../src/tracing/instrument.rs.html#276">source</a><a href="#impl-Instrument-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="../../../tracing/instrument/trait.Instrument.html" title="trait tracing::instrument::Instrument">Instrument</a> for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.instrument" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../src/tracing/instrument.rs.html#82">source</a><a href="#method.instrument" class="anchor"></a><h4 class="code-header">fn <a href="../../../tracing/instrument/trait.Instrument.html#method.instrument" class="fnname">instrument</a>(self, span: <a class="struct" href="../../../tracing/span/struct.Span.html" title="struct tracing::span::Span">Span</a>) -> <a class="struct" href="../../../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><div class='docblock'>Instruments this type with the provided <a href="../../../tracing/span/struct.Span.html" title="Span"><code>Span</code></a>, returning an |
| <code>Instrumented</code> wrapper. <a href="../../../tracing/instrument/trait.Instrument.html#method.instrument">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.in_current_span" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../src/tracing/instrument.rs.html#121">source</a><a href="#method.in_current_span" class="anchor"></a><h4 class="code-header">fn <a href="../../../tracing/instrument/trait.Instrument.html#method.in_current_span" class="fnname">in_current_span</a>(self) -> <a class="struct" href="../../../tracing/instrument/struct.Instrumented.html" title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><div class='docblock'>Instruments this type with the <a href="../../../tracing/span/struct.Span.html#method.current">current</a> <a href="../../../tracing/span/struct.Span.html"><code>Span</code></a>, returning an |
| <code>Instrumented</code> wrapper. <a href="../../../tracing/instrument/trait.Instrument.html#method.in_current_span">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a href="#impl-Into%3CU%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<T, U> Into<U> for T<span class="where fmt-newline">where<br> U: From<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p> |
| <p>That is, this conversion is whatever the implementation of |
| <code>[From]<T> for U</code> chooses to do.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a href="#impl-TryFrom%3CU%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<T, U> TryFrom<U> for T<span class="where fmt-newline">where<br> U: Into<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error-1" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = Infallible</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_from</a>(value: U) -> Result<T, <T as TryFrom<U>>::Error></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a href="#impl-TryInto%3CU%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<T, U> TryInto<U> for T<span class="where fmt-newline">where<br> U: TryFrom<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = <U as TryFrom<T>>::Error</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_into</a>(self) -> Result<U, <U as TryFrom<T>>::Error></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-VZip%3CV%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a class="srclink rightside" href="../../../src/ppv_lite86/types.rs.html#221">source</a><a href="#impl-VZip%3CV%3E-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<V, T> <a class="trait" href="../../../ppv_lite86/types/trait.VZip.html" title="trait ppv_lite86::types::VZip">VZip</a><V> for T<span class="where fmt-newline">where<br> V: <a class="trait" href="../../../ppv_lite86/types/trait.MultiLane.html" title="trait ppv_lite86::types::MultiLane">MultiLane</a><T>,</span></h3></section></summary><div class="impl-items"><section id="method.vzip" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../src/ppv_lite86/types.rs.html#226">source</a><a href="#method.vzip" class="anchor"></a><h4 class="code-header">fn <a href="../../../ppv_lite86/types/trait.VZip.html#tymethod.vzip" class="fnname">vzip</a>(self) -> V</h4></section></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-WithSubscriber-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="impl has-srclink"><a class="srclink rightside" href="../../../src/tracing/instrument.rs.html#334">source</a><a href="#impl-WithSubscriber-for-ReadyCache%3CK%2C%20S%2C%20Req%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="../../../tracing/instrument/trait.WithSubscriber.html" title="trait tracing::instrument::WithSubscriber">WithSubscriber</a> for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.with_subscriber" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../src/tracing/instrument.rs.html#169-171">source</a><a href="#method.with_subscriber" class="anchor"></a><h4 class="code-header">fn <a href="../../../tracing/instrument/trait.WithSubscriber.html#method.with_subscriber" class="fnname">with_subscriber</a><S>(self, subscriber: S) -> <a class="struct" href="../../../tracing/instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self><span class="where fmt-newline">where<br> S: Into<<a class="struct" href="../../../tracing_core/dispatcher/struct.Dispatch.html" title="struct tracing_core::dispatcher::Dispatch">Dispatch</a>>,</span></h4></section></summary><div class='docblock'>Attaches the provided <a href="../../../tracing_core/subscriber/trait.Subscriber.html"><code>Subscriber</code></a> to this type, returning a |
| <a href="../../../tracing/instrument/struct.WithDispatch.html" title="WithDispatch"><code>WithDispatch</code></a> wrapper. <a href="../../../tracing/instrument/trait.WithSubscriber.html#method.with_subscriber">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.with_current_subscriber" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../../src/tracing/instrument.rs.html#221">source</a><a href="#method.with_current_subscriber" class="anchor"></a><h4 class="code-header">fn <a href="../../../tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber" class="fnname">with_current_subscriber</a>(self) -> <a class="struct" href="../../../tracing/instrument/struct.WithDispatch.html" title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self></h4></section></summary><div class='docblock'>Attaches the current <a href="../../../tracing/dispatcher/index.html#setting-the-default-subscriber">default</a> <a href="../../../tracing_core/subscriber/trait.Subscriber.html"><code>Subscriber</code></a> to this type, returning a |
| <a href="../../../tracing/instrument/struct.WithDispatch.html" title="WithDispatch"><code>WithDispatch</code></a> wrapper. <a href="../../../tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber">Read more</a></div></details></div></details></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> |
