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Client Connection Pooling</span> <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>borrow</span>::<span class='ident'>ToOwned</span>; <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>collections</span>::<span class='ident'>HashMap</span>; <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>fmt</span>; <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>io</span>::{<span class='self'>self</span>, <span class='ident'>Read</span>, <span class='ident'>Write</span>}; <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>net</span>::{<span class='ident'>SocketAddr</span>, <span class='ident'>Shutdown</span>}; <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>sync</span>::{<span class='ident'>Arc</span>, <span class='ident'>Mutex</span>}; <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>time</span>::<span class='ident'>Duration</span>; <span class='kw'>use</span> <span class='ident'>net</span>::{<span class='ident'>NetworkConnector</span>, <span class='ident'>NetworkStream</span>, <span class='ident'>DefaultConnector</span>}; <span class='doccomment'>/// The `NetworkConnector` that behaves as a connection pool used by hyper's `Client`.</span> <span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Pool</span><span class='op'><</span><span class='ident'>C</span>: <span class='ident'>NetworkConnector</span><span class='op'>></span> { <span class='ident'>connector</span>: <span class='ident'>C</span>, <span class='ident'>inner</span>: <span class='ident'>Arc</span><span class='op'><</span><span class='ident'>Mutex</span><span class='op'><</span><span class='ident'>PoolImpl</span><span class='op'><<</span><span class='ident'>C</span> <span class='kw'>as</span> <span class='ident'>NetworkConnector</span><span class='op'>></span>::<span class='ident'>Stream</span><span class='op'>>></span><span class='op'>></span> } <span class='doccomment'>/// Config options for the `Pool`.</span> <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Debug</span>)]</span> <span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Config</span> { <span class='doccomment'>/// The maximum idle connections *per host*.</span> <span class='kw'>pub</span> <span class='ident'>max_idle</span>: <span class='ident'>usize</span>, } <span class='kw'>impl</span> <span class='ident'>Default</span> <span class='kw'>for</span> <span class='ident'>Config</span> { <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>default</span>() <span class='op'>-></span> <span class='ident'>Config</span> { <span class='ident'>Config</span> { <span class='ident'>max_idle</span>: <span class='number'>5</span>, } } } <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Debug</span>)]</span> <span class='kw'>struct</span> <span class='ident'>PoolImpl</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span> { <span class='ident'>conns</span>: <span class='ident'>HashMap</span><span class='op'><</span><span class='ident'>Key</span>, <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>PooledStreamInner</span><span class='op'><</span><span class='ident'>S</span><span class='op'>>></span><span class='op'>></span>, <span class='ident'>config</span>: <span class='ident'>Config</span>, } <span class='kw'>type</span> <span class='ident'>Key</span> <span class='op'>=</span> (<span class='ident'>String</span>, <span class='ident'>u16</span>, <span class='ident'>Scheme</span>); <span class='kw'>fn</span> <span class='ident'>key</span><span class='op'><</span><span class='ident'>T</span>: <span class='ident'>Into</span><span class='op'><</span><span class='ident'>Scheme</span><span class='op'>>></span>(<span class='ident'>host</span>: <span class='kw-2'>&</span><span class='ident'>str</span>, <span class='ident'>port</span>: <span class='ident'>u16</span>, <span class='ident'>scheme</span>: <span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>Key</span> { (<span class='ident'>host</span>.<span class='ident'>to_owned</span>(), <span class='ident'>port</span>, <span class='ident'>scheme</span>.<span class='ident'>into</span>()) } <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>, <span class='ident'>PartialEq</span>, <span class='ident'>Eq</span>, <span class='ident'>Debug</span>, <span class='ident'>Hash</span>)]</span> <span class='kw'>enum</span> <span class='ident'>Scheme</span> { <span class='ident'>Http</span>, <span class='ident'>Https</span>, <span class='ident'>Other</span>(<span class='ident'>String</span>) } <span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span><span class='op'>></span> <span class='ident'>From</span><span class='op'><</span><span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>str</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>Scheme</span> { <span class='kw'>fn</span> <span class='ident'>from</span>(<span class='ident'>s</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>str</span>) <span class='op'>-></span> <span class='ident'>Scheme</span> { <span class='kw'>match</span> <span class='ident'>s</span> { <span class='string'>"http"</span> <span class='op'>=></span> <span class='ident'>Scheme</span>::<span class='ident'>Http</span>, <span class='string'>"https"</span> <span class='op'>=></span> <span class='ident'>Scheme</span>::<span class='ident'>Https</span>, <span class='ident'>s</span> <span class='op'>=></span> <span class='ident'>Scheme</span>::<span class='ident'>Other</span>(<span class='ident'>String</span>::<span class='ident'>from</span>(<span class='ident'>s</span>)) } } } <span class='kw'>impl</span> <span class='ident'>Pool</span><span class='op'><</span><span class='ident'>DefaultConnector</span><span class='op'>></span> { <span class='doccomment'>/// Creates a `Pool` with a `DefaultConnector`.</span> <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>config</span>: <span class='ident'>Config</span>) <span class='op'>-></span> <span class='ident'>Pool</span><span class='op'><</span><span class='ident'>DefaultConnector</span><span class='op'>></span> { <span class='ident'>Pool</span>::<span class='ident'>with_connector</span>(<span class='ident'>config</span>, <span class='ident'>DefaultConnector</span>::<span class='ident'>default</span>()) } } <span class='kw'>impl</span><span class='op'><</span><span class='ident'>C</span>: <span class='ident'>NetworkConnector</span><span class='op'>></span> <span class='ident'>Pool</span><span class='op'><</span><span class='ident'>C</span><span class='op'>></span> { <span class='doccomment'>/// Creates a `Pool` with a specified `NetworkConnector`.</span> <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>with_connector</span>(<span class='ident'>config</span>: <span class='ident'>Config</span>, <span class='ident'>connector</span>: <span class='ident'>C</span>) <span class='op'>-></span> <span class='ident'>Pool</span><span class='op'><</span><span class='ident'>C</span><span class='op'>></span> { <span class='ident'>Pool</span> { <span class='ident'>connector</span>: <span class='ident'>connector</span>, <span class='ident'>inner</span>: <span class='ident'>Arc</span>::<span class='ident'>new</span>(<span class='ident'>Mutex</span>::<span class='ident'>new</span>(<span class='ident'>PoolImpl</span> { <span class='ident'>conns</span>: <span class='ident'>HashMap</span>::<span class='ident'>new</span>(), <span class='ident'>config</span>: <span class='ident'>config</span>, })) } } <span class='doccomment'>/// Clear all idle connections from the Pool, closing them.</span> <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>clear_idle</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) { <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>lock</span>().<span class='ident'>unwrap</span>().<span class='ident'>conns</span>.<span class='ident'>clear</span>(); } } <span class='kw'>impl</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span> <span class='ident'>PoolImpl</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span> { <span class='kw'>fn</span> <span class='ident'>reuse</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>key</span>: <span class='ident'>Key</span>, <span class='ident'>conn</span>: <span class='ident'>PooledStreamInner</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span>) { <span class='macro'>trace</span><span class='macro'>!</span>(<span class='string'>"reuse {:?}"</span>, <span class='ident'>key</span>); <span class='kw'>let</span> <span class='ident'>conns</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>conns</span>.<span class='ident'>entry</span>(<span class='ident'>key</span>).<span class='ident'>or_insert</span>(<span class='macro'>vec</span><span class='macro'>!</span>[]); <span class='kw'>if</span> <span class='ident'>conns</span>.<span class='ident'>len</span>() <span class='op'><</span> <span class='self'>self</span>.<span class='ident'>config</span>.<span class='ident'>max_idle</span> { <span class='ident'>conns</span>.<span class='ident'>push</span>(<span class='ident'>conn</span>); } } } <span class='kw'>impl</span><span class='op'><</span><span class='ident'>C</span>: <span class='ident'>NetworkConnector</span><span class='op'><</span><span class='ident'>Stream</span><span class='op'>=</span><span class='ident'>S</span><span class='op'>></span>, <span class='ident'>S</span>: <span class='ident'>NetworkStream</span> <span class='op'>+</span> <span class='ident'>Send</span><span class='op'>></span> <span class='ident'>NetworkConnector</span> <span class='kw'>for</span> <span class='ident'>Pool</span><span class='op'><</span><span class='ident'>C</span><span class='op'>></span> { <span class='kw'>type</span> <span class='ident'>Stream</span> <span class='op'>=</span> <span class='ident'>PooledStream</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span>; <span class='kw'>fn</span> <span class='ident'>connect</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>host</span>: <span class='kw-2'>&</span><span class='ident'>str</span>, <span class='ident'>port</span>: <span class='ident'>u16</span>, <span class='ident'>scheme</span>: <span class='kw-2'>&</span><span class='ident'>str</span>) <span class='op'>-></span> ::<span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>PooledStream</span><span class='op'><</span><span class='ident'>S</span><span class='op'>>></span> { <span class='kw'>let</span> <span class='ident'>key</span> <span class='op'>=</span> <span class='ident'>key</span>(<span class='ident'>host</span>, <span class='ident'>port</span>, <span class='ident'>scheme</span>); <span class='kw'>let</span> <span class='ident'>inner</span> <span class='op'>=</span> { <span class='comment'>// keep the mutex locked only in this block</span> <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>locked</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>lock</span>().<span class='ident'>unwrap</span>(); <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>should_remove</span> <span class='op'>=</span> <span class='bool-val'>false</span>; <span class='kw'>let</span> <span class='ident'>inner</span> <span class='op'>=</span> <span class='ident'>locked</span>.<span class='ident'>conns</span>.<span class='ident'>get_mut</span>(<span class='kw-2'>&</span><span class='ident'>key</span>).<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>vec</span><span class='op'>|</span> { <span class='macro'>trace</span><span class='macro'>!</span>(<span class='string'>"Pool had connection, using"</span>); <span class='ident'>should_remove</span> <span class='op'>=</span> <span class='ident'>vec</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>1</span>; <span class='ident'>vec</span>.<span class='ident'>pop</span>().<span class='ident'>unwrap</span>() }); <span class='kw'>if</span> <span class='ident'>should_remove</span> { <span class='ident'>locked</span>.<span class='ident'>conns</span>.<span class='ident'>remove</span>(<span class='kw-2'>&</span><span class='ident'>key</span>); } <span class='ident'>inner</span> }; <span class='kw'>let</span> <span class='ident'>inner</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='ident'>inner</span> { <span class='prelude-val'>Some</span>(<span class='ident'>inner</span>) <span class='op'>=></span> <span class='ident'>inner</span>, <span class='prelude-val'>None</span> <span class='op'>=></span> <span class='ident'>PooledStreamInner</span> { <span class='ident'>key</span>: <span class='ident'>key</span>.<span class='ident'>clone</span>(), <span class='ident'>stream</span>: <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>connector</span>.<span class='ident'>connect</span>(<span class='ident'>host</span>, <span class='ident'>port</span>, <span class='ident'>scheme</span>)), <span class='ident'>previous_response_expected_no_content</span>: <span class='bool-val'>false</span>, } }; <span class='prelude-val'>Ok</span>(<span class='ident'>PooledStream</span> { <span class='ident'>inner</span>: <span class='prelude-val'>Some</span>(<span class='ident'>inner</span>), <span class='ident'>is_closed</span>: <span class='bool-val'>false</span>, <span class='ident'>pool</span>: <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>clone</span>(), }) } } <span class='doccomment'>/// A Stream that will try to be returned to the Pool when dropped.</span> <span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>PooledStream</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span> { <span class='ident'>inner</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>PooledStreamInner</span><span class='op'><</span><span class='ident'>S</span><span class='op'>>></span>, <span class='ident'>is_closed</span>: <span class='ident'>bool</span>, <span class='ident'>pool</span>: <span class='ident'>Arc</span><span class='op'><</span><span class='ident'>Mutex</span><span class='op'><</span><span class='ident'>PoolImpl</span><span class='op'><</span><span class='ident'>S</span><span class='op'>>></span><span class='op'>></span>, } <span class='comment'>// manual impl to add the 'static bound for 1.7 compat</span> <span class='kw'>impl</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span> <span class='ident'>fmt</span>::<span class='ident'>Debug</span> <span class='kw'>for</span> <span class='ident'>PooledStream</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span> <span class='kw'>where</span> <span class='ident'>S</span>: <span class='ident'>fmt</span>::<span class='ident'>Debug</span> <span class='op'>+</span> <span class='lifetime'>'static</span> { <span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>fmt</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-></span> <span class='ident'>fmt</span>::<span class='prelude-ty'>Result</span> { <span class='ident'>fmt</span>.<span class='ident'>debug_struct</span>(<span class='string'>"PooledStream"</span>) .<span class='ident'>field</span>(<span class='string'>"inner"</span>, <span class='kw-2'>&</span><span class='self'>self</span>.<span class='ident'>inner</span>) .<span class='ident'>field</span>(<span class='string'>"is_closed"</span>, <span class='kw-2'>&</span><span class='self'>self</span>.<span class='ident'>is_closed</span>) .<span class='ident'>field</span>(<span class='string'>"pool"</span>, <span class='kw-2'>&</span><span class='self'>self</span>.<span class='ident'>pool</span>) .<span class='ident'>finish</span>() } } <span class='kw'>impl</span><span class='op'><</span><span class='ident'>S</span>: <span class='ident'>NetworkStream</span><span class='op'>></span> <span class='ident'>PooledStream</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span> { <span class='doccomment'>/// Take the wrapped stream out of the pool completely.</span> <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>into_inner</span>(<span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>S</span> { <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>take</span>().<span class='ident'>expect</span>(<span class='string'>"PooledStream lost its inner stream"</span>).<span class='ident'>stream</span> } } <span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Debug</span>)]</span> <span class='kw'>struct</span> <span class='ident'>PooledStreamInner</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span> { <span class='ident'>key</span>: <span class='ident'>Key</span>, <span class='ident'>stream</span>: <span class='ident'>S</span>, <span class='ident'>previous_response_expected_no_content</span>: <span class='ident'>bool</span>, } <span class='kw'>impl</span><span class='op'><</span><span class='ident'>S</span>: <span class='ident'>NetworkStream</span><span class='op'>></span> <span class='ident'>Read</span> <span class='kw'>for</span> <span class='ident'>PooledStream</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span> { <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>read</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>buf</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> [<span class='ident'>u8</span>]) <span class='op'>-></span> <span class='ident'>io</span>::<span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>></span> { <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>as_mut</span>().<span class='ident'>unwrap</span>().<span class='ident'>stream</span>.<span class='ident'>read</span>(<span class='ident'>buf</span>) { <span class='prelude-val'>Ok</span>(<span class='number'>0</span>) <span class='op'>=></span> { <span class='comment'>// if the wrapped stream returns EOF (Ok(0)), that means the</span> <span class='comment'>// server has closed the stream. we must be sure this stream</span> <span class='comment'>// is dropped and not put back into the pool.</span> <span class='self'>self</span>.<span class='ident'>is_closed</span> <span class='op'>=</span> <span class='bool-val'>true</span>; <span class='prelude-val'>Ok</span>(<span class='number'>0</span>) }, <span class='ident'>r</span> <span class='op'>=></span> <span class='ident'>r</span> } } } <span class='kw'>impl</span><span class='op'><</span><span class='ident'>S</span>: <span class='ident'>NetworkStream</span><span class='op'>></span> <span class='ident'>Write</span> <span class='kw'>for</span> <span class='ident'>PooledStream</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span> { <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>write</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>buf</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]) <span class='op'>-></span> <span class='ident'>io</span>::<span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>usize</span><span class='op'>></span> { <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>as_mut</span>().<span class='ident'>unwrap</span>().<span class='ident'>stream</span>.<span class='ident'>write</span>(<span class='ident'>buf</span>) } <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>flush</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>io</span>::<span class='prelude-ty'>Result</span><span class='op'><</span>()<span class='op'>></span> { <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>as_mut</span>().<span class='ident'>unwrap</span>().<span class='ident'>stream</span>.<span class='ident'>flush</span>() } } <span class='kw'>impl</span><span class='op'><</span><span class='ident'>S</span>: <span class='ident'>NetworkStream</span><span class='op'>></span> <span class='ident'>NetworkStream</span> <span class='kw'>for</span> <span class='ident'>PooledStream</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span> { <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>peer_addr</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>io</span>::<span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>SocketAddr</span><span class='op'>></span> { <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>as_mut</span>().<span class='ident'>unwrap</span>().<span class='ident'>stream</span>.<span class='ident'>peer_addr</span>() } <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>set_read_timeout</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>dur</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>Duration</span><span class='op'>></span>) <span class='op'>-></span> <span class='ident'>io</span>::<span class='prelude-ty'>Result</span><span class='op'><</span>()<span class='op'>></span> { <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>as_ref</span>().<span class='ident'>unwrap</span>().<span class='ident'>stream</span>.<span class='ident'>set_read_timeout</span>(<span class='ident'>dur</span>) } <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>set_write_timeout</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>dur</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>Duration</span><span class='op'>></span>) <span class='op'>-></span> <span class='ident'>io</span>::<span class='prelude-ty'>Result</span><span class='op'><</span>()<span class='op'>></span> { <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>as_ref</span>().<span class='ident'>unwrap</span>().<span class='ident'>stream</span>.<span class='ident'>set_write_timeout</span>(<span class='ident'>dur</span>) } <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>close</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>how</span>: <span class='ident'>Shutdown</span>) <span class='op'>-></span> <span class='ident'>io</span>::<span class='prelude-ty'>Result</span><span class='op'><</span>()<span class='op'>></span> { <span class='self'>self</span>.<span class='ident'>is_closed</span> <span class='op'>=</span> <span class='bool-val'>true</span>; <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>as_mut</span>().<span class='ident'>unwrap</span>().<span class='ident'>stream</span>.<span class='ident'>close</span>(<span class='ident'>how</span>) } <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>set_previous_response_expected_no_content</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>expected</span>: <span class='ident'>bool</span>) { <span class='macro'>trace</span><span class='macro'>!</span>(<span class='string'>"set_previous_response_expected_no_content {}"</span>, <span class='ident'>expected</span>); <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>as_mut</span>().<span class='ident'>unwrap</span>().<span class='ident'>previous_response_expected_no_content</span> <span class='op'>=</span> <span class='ident'>expected</span>; } <span class='attribute'>#[<span class='ident'>inline</span>]</span> <span class='kw'>fn</span> <span class='ident'>previous_response_expected_no_content</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='kw'>let</span> <span class='ident'>answer</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>as_ref</span>().<span class='ident'>unwrap</span>().<span class='ident'>previous_response_expected_no_content</span>; <span class='macro'>trace</span><span class='macro'>!</span>(<span class='string'>"previous_response_expected_no_content {}"</span>, <span class='ident'>answer</span>); <span class='ident'>answer</span> } } <span class='kw'>impl</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span> <span class='ident'>Drop</span> <span class='kw'>for</span> <span class='ident'>PooledStream</span><span class='op'><</span><span class='ident'>S</span><span class='op'>></span> { <span class='kw'>fn</span> <span class='ident'>drop</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) { <span class='macro'>trace</span><span class='macro'>!</span>(<span class='string'>"PooledStream.drop, is_closed={}"</span>, <span class='self'>self</span>.<span class='ident'>is_closed</span>); <span class='kw'>if</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>is_closed</span> { <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>take</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>inner</span><span class='op'>|</span> { <span class='kw'>if</span> <span class='kw'>let</span> <span class='prelude-val'>Ok</span>(<span class='kw-2'>mut</span> <span class='ident'>pool</span>) <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>pool</span>.<span class='ident'>lock</span>() { <span class='ident'>pool</span>.<span class='ident'>reuse</span>(<span class='ident'>inner</span>.<span class='ident'>key</span>.<span class='ident'>clone</span>(), <span class='ident'>inner</span>); } <span class='comment'>// else poisoned, give up</span> }); } } } <span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>test</span>)]</span> <span class='kw'>mod</span> <span class='ident'>tests</span> { <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>net</span>::<span class='ident'>Shutdown</span>; <span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>io</span>::<span class='ident'>Read</span>; <span class='kw'>use</span> <span class='ident'>mock</span>::{<span class='ident'>MockConnector</span>}; <span class='kw'>use</span> <span class='ident'>net</span>::{<span class='ident'>NetworkConnector</span>, <span class='ident'>NetworkStream</span>}; <span class='kw'>use</span> <span class='kw'>super</span>::{<span class='ident'>Pool</span>, <span class='ident'>key</span>}; <span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>mocked</span> { () <span class='op'>=></span> ({ <span class='ident'>Pool</span>::<span class='ident'>with_connector</span>(<span class='ident'>Default</span>::<span class='ident'>default</span>(), <span class='ident'>MockConnector</span>) }) } <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_connect_and_drop</span>() { <span class='kw'>let</span> <span class='ident'>pool</span> <span class='op'>=</span> <span class='macro'>mocked</span><span class='macro'>!</span>(); <span class='kw'>let</span> <span class='ident'>key</span> <span class='op'>=</span> <span class='ident'>key</span>(<span class='string'>"127.0.0.1"</span>, <span class='number'>3000</span>, <span class='string'>"http"</span>); <span class='ident'>pool</span>.<span class='ident'>connect</span>(<span class='string'>"127.0.0.1"</span>, <span class='number'>3000</span>, <span class='string'>"http"</span>).<span class='ident'>unwrap</span>(); { <span class='kw'>let</span> <span class='ident'>locked</span> <span class='op'>=</span> <span class='ident'>pool</span>.<span class='ident'>inner</span>.<span class='ident'>lock</span>().<span class='ident'>unwrap</span>(); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>locked</span>.<span class='ident'>conns</span>.<span class='ident'>len</span>(), <span class='number'>1</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>locked</span>.<span class='ident'>conns</span>.<span class='ident'>get</span>(<span class='kw-2'>&</span><span class='ident'>key</span>).<span class='ident'>unwrap</span>().<span class='ident'>len</span>(), <span class='number'>1</span>); } <span class='ident'>pool</span>.<span class='ident'>connect</span>(<span class='string'>"127.0.0.1"</span>, <span class='number'>3000</span>, <span class='string'>"http"</span>).<span class='ident'>unwrap</span>(); <span class='comment'>//reused</span> { <span class='kw'>let</span> <span class='ident'>locked</span> <span class='op'>=</span> <span class='ident'>pool</span>.<span class='ident'>inner</span>.<span class='ident'>lock</span>().<span class='ident'>unwrap</span>(); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>locked</span>.<span class='ident'>conns</span>.<span class='ident'>len</span>(), <span class='number'>1</span>); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>locked</span>.<span class='ident'>conns</span>.<span class='ident'>get</span>(<span class='kw-2'>&</span><span class='ident'>key</span>).<span class='ident'>unwrap</span>().<span class='ident'>len</span>(), <span class='number'>1</span>); } } <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_closed</span>() { <span class='kw'>let</span> <span class='ident'>pool</span> <span class='op'>=</span> <span class='macro'>mocked</span><span class='macro'>!</span>(); <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>stream</span> <span class='op'>=</span> <span class='ident'>pool</span>.<span class='ident'>connect</span>(<span class='string'>"127.0.0.1"</span>, <span class='number'>3000</span>, <span class='string'>"http"</span>).<span class='ident'>unwrap</span>(); <span class='ident'>stream</span>.<span class='ident'>close</span>(<span class='ident'>Shutdown</span>::<span class='ident'>Both</span>).<span class='ident'>unwrap</span>(); <span class='ident'>drop</span>(<span class='ident'>stream</span>); <span class='kw'>let</span> <span class='ident'>locked</span> <span class='op'>=</span> <span class='ident'>pool</span>.<span class='ident'>inner</span>.<span class='ident'>lock</span>().<span class='ident'>unwrap</span>(); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>locked</span>.<span class='ident'>conns</span>.<span class='ident'>len</span>(), <span class='number'>0</span>); } <span class='attribute'>#[<span class='ident'>test</span>]</span> <span class='kw'>fn</span> <span class='ident'>test_eof_closes</span>() { <span class='kw'>let</span> <span class='ident'>pool</span> <span class='op'>=</span> <span class='macro'>mocked</span><span class='macro'>!</span>(); <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>stream</span> <span class='op'>=</span> <span class='ident'>pool</span>.<span class='ident'>connect</span>(<span class='string'>"127.0.0.1"</span>, <span class='number'>3000</span>, <span class='string'>"http"</span>).<span class='ident'>unwrap</span>(); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>stream</span>.<span class='ident'>read</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> [<span class='number'>0</span>]).<span class='ident'>unwrap</span>(), <span class='number'>0</span>); <span class='ident'>drop</span>(<span class='ident'>stream</span>); <span class='kw'>let</span> <span class='ident'>locked</span> <span class='op'>=</span> <span class='ident'>pool</span>.<span class='ident'>inner</span>.<span class='ident'>lock</span>().<span class='ident'>unwrap</span>(); <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>locked</span>.<span class='ident'>conns</span>.<span class='ident'>len</span>(), <span class='number'>0</span>); } } </pre> </section> <section id='search' class="content hidden"></section> <section class="footer"></section> <aside id="help" class="hidden"> <div> <h1 class="hidden">Help</h1> <div class="shortcuts"> <h2>Keyboard 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