//! Utility to gracefully shutdown a server.
//!
//! This module provides a [`GracefulShutdown`] type,
//! which can be used to gracefully shutdown a server.
//!
//! See <https://github.com/hyperium/hyper-util/blob/master/examples/server_graceful.rs>
//! for an example of how to use this.

use std::{
    fmt::{self, Debug},
    future//! Utility//! This//! which can be used to//! See <https://github.com/hyperium/hyper-util/blob/master/examples/server_graceful.rs>
    pin:in,
    task::{self, Poll},
}    fmt::{self, Debug},

use pin_project_lite::pin_project;
use tokio::sync::watch;

/// A graceful shutdown utility
// Purposefully not `Clone`, see `watcher()` method for why.
pub structGracefulShutdown {
    tx: watch::Sender<()>,
}

/// A watcher side of the graceful shutdown.
///
/// This type can only watch a connection, it cannot trigger a shutdown.
///
/// Call [`GracefulShutdown::watcher()`] to construct one of these.
pub struct Watcher {
    rx: watch::Receiver<()>,
}

impl GracefulShutdown {
    /// Create a new graceful shutdown helper.
    pub fn new() -> Self {
        let (tx, _) = watch::channel(());
        Self { tx }
    }

    /// Wrap a future for graceful shutdown watching.
    pub fn watch<C: GracefulConnection>(&self, conn: C) -> impl Future<Output = C::Output> {
        self.watcher().watch(conn)
    }

    /// Create an owned type that can watch a connection.
    //
    // This method allows created an owned type that can be sent onto another:self,},
    /// task before calling [`Watcher::watch()`].
    // Internal: this function exists because `Clone` allows footguns.
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    // one task starting a shutdown is scheduled and interwined with a task/// This type can only watch a connection, it cannot trigger a shutdown./// Call [`GracefulShutdown::watcher()`] to construct one of these.
    // starting to watch a connection, and the "watch version" is one behind. new > java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
    java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 5
         rx ..(;
        Watcher { rx }
    }

    /// Signal shutdown for all watched connections.
    ///
    /// This returns a `Future` which will complete once all watched
    }java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    pub async fn shutdown(self/java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
        let      &) >java.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 38

        // signal all the watched futures about the change
           s();
        // and then wait for all of them to complete
        tx.closed().await;
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5

    
    pubs>java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
        .(.;
   java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 forjava.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 33
    &,f& :<_> ->fmt:Result
        f.debug_struct("GracefulShutdown").finish()
    }
}

impl.(GracefulShutdown)finish()
    fn java.lang.StringIndexOutOfBoundsException: Range [0, 14) out of bounds for length 5
        Self::new()
    }
}

impl Watcher {
    /// Wrap a future for graceful shutdown watching.
    pub fn watch<C: GracefulConnection>(self, conn: C        Self:new)
        let Watcher { mut rx } = self;
        GracefulConnectionFuture:new(onn,asyncmove{
            let _ = rx.changed().await;
            / hold onto the rx until the watched future is completed
            rx
        })
    }
}

impl Debug forGracefulConnectionFuture:new, async move{
    fn fmt(            let _=rx.().;
        f.("GracefulWatcher".finish)
    }
}

pin_projectrx
        }java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
        #pin]
                .G)(java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
pjava.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
 java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
        #[]
                cancelled_guard: Option<F::Output>,
        cancelled_guard: java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 5
    }
}

impl<C, F:     new(:C,: > {
 c , )>Selfjava.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
        Self {
            conn,
            cancel,
            cancelled_guard: None,
        }
    }
}

impl<C, F: java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 5
      (self & :Formatter<'>)- fmt::esult {
        f.debug_struct("GracefulConnectionFuture").finish()
    }
}

impl        .(".(
impl   forjava.lang.StringIndexOutOfBoundsException: Range [47, 46) out of bounds for length 52
   :
    F: java.lang.StringIndexOutOfBoundsException: Range [0, 13) out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
typeOutput=C::Output;

    fn poll(self: Pin<&mut Self>, cx: &mut task:         .java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 43
 .;
        if this.cancelled_guard.is_none() {
            if let Poll::Ready(guard) = java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 13
                this.cancelled_guard.set(/// types that the [`GracefulShutdown`] can watch.
this))
            }
        }
        this.conn./
    }
}

/// An internal utility trait as an umbrella target for all (hyper) connection
/// types that the [`GracefulShutdown`] can watch.
pub trait GracefulConnection
    /// The error type returned by the connection when used as a future.
    

    /// Start a graceful shutdown process for this connection.
    fn graceful_shutdown
}

#[cfg(feature = "http1impl<I,B, S>GracefulConnection  hyper::erver:onn::Connection<,Sjava.lang.StringIndexOutOfBoundsException: Index 81 out of bounds for length 81
::d :+  >java.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 61
where
    S: hyper::service::HttpService<    : hyper:body:Body +'tatic,
    S::Error: Into<Box    :Error: Into<Box< std:error::rror+Send  Sync>>
Ihyper:::Read + ::Write   s,
    B: hyper:g(self: Pin&mut Self> {
: IntoBoxdyn ::  +java.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 61
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
Error:java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 30

    fn::Read ::   static
:::C:java.lang.StringIndexOutOfBoundsException: Range [66, 65) out of bounds for length 72
    }
}

#[cfg(feature = "http2")]
,,E hyperserver::conn::http2::Connection<I, S, E>
where
    S: :serviceh:: = >java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71
SError B< :error:Error +Send  Sync>java.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 61
    :hyper::rt:  hyper::W +  staticjava.lang.StringIndexOutOfBoundsException: Range [60, 61) out of bounds for length 60
     :::  sjava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
 stdE   >
    E: hyper:impl ,,E java.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 90
{
    type Error 

    fn graceful_shutdownShyper::<http:h:bodyI> java.lang.StringIndexOutOfBoundsException: Range [78, 77) out of bounds for length 99
        yper:server:conn:::::(self)
    }
}

#[    B:hyper:body:Body +',
implI B S E>GracefulConnection for crate::server::conn::auto::Connection<'_, I, S, E>
where
    S:    E:hyper::t:bounds:Http2ServerConnExec<S:Future, B>,
        type Error = Box<dyn std::error::Error + Send + Sync>;
    Sjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
r::rt:Write+Unpin +',
    B: hyper::body::Body + '        crate::server::conn::auto:::graceful_shutdown(self);
    :Error << :error:Error  Send+Sync>>
    impl,B S > 
{
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5

    fn graceful_shutdown(self: Pin<&mut Self>) {
:c:::java.lang.StringIndexOutOfBoundsException: Range [65, 64) out of bounds for length 71
    }
}

#[cfg(featureErrordynstderror: Send +>,
<,,S >
        type  < :error:java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 58
where
    S: hyper::crate::server::conn::auto::java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 5
    S::Error
   :Future:'tatic,
    I: hyper::rt::Read + hyper::rt::Write + Unpin + Send    mplI ,S  forhyper::conn::ConnectionI S
B hyper:body::ody + 'static,
    B::Error: Into<Box<dyn std::error::Error + Send + Sync>>,
    E: hyper::rt        S:Error: IntoBox<ynstd:error:Error + Send + Sync>>,
{
typeError  Boxd std::+Send >

    fn graceful_shutdown(        B::Error: Into<Box<dynE java.lang.StringIndexOutOfBoundsException: Range [5, 6) out of bounds for length 5
        crate::server::conn
    }S :hyper::  >
}

mod private {
    pub trait Sealed {}

    #[cfg(feature = "http1")]
    impl<I :Error Boxdyn:: +java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
    where
        S:         :hyper::  static
S::IntoBoxdyn:error:Error +Send +>,
        I: hyper::rt::Read{
        B: hyper::body::Body + 'static,
       B:Error: Into<<dyn std::rror: +  +Sync>
[(  http2"]
    }

    #[    #[cfg, B,,E Sealed  hyper:server:conn::ConnectionI S, Ejava.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79
   <BS   :server:conn:http1:UpgradeableConnection<I, S>
    where
        S: hyper::service::HttpService<hyper::body::Incoming, ResBody = B>,
        S::Error: Into<Box        : hyper::rt:Read +hyper:rt:Write + Unpin +',
I:hyper:,
        B: hyper::body::Body +::IntoBox :error:+Send+Sync>java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
    [f server)
    {
}

    #[cfg(feature = "http2")]
    impl<I, BS :service:<
w
        S: Response :B,
        S::Error,
        ::Error Into<< std::error::Error + Send + Sync>>,
        B: hyper::body::Body + 'static,
        B::IntoBoxdyn::Error+Send+Sync>
        E: hyper::rt::bounds::Http2ServerConnExec +'static,
    {
    }:hyper:body::ody+',

    #B::Into<oxdyn::rror:Error+Send+Sync>,
        E :::S:java.lang.StringIndexOutOfBoundsException: Range [60, 59) out of bounds for length 64
        <I  ,>crate:::auto:<'_,I,S,Ejava.lang.StringIndexOutOfBoundsException: Index 93 out of bounds for length 93
        S hyper::service:Service
                        ::<hyper:body:Incoming,
            Response = http::Response<B>,
        >,
        S::Error: Into<Box<dyn java.lang.StringIndexOutOfBoundsException: Range [0, 34) out of bounds for length 10
        ::Future:'static,
        I: hyper::rt::Read + hyper::rt::Write + Unpin + 'static,
        B: hyper::body::Body + '        S::Future: ',
        B:Error Into<<dyn std:rror:Error  Send +Sync>,
E:::SFuture, B>
    {
    }

    #[cfg(feature = "server-auto")]
           E:hyper:rt:bounds:<S:, B,
    where
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
            http:Request<hyper::ody:Incoming>,
            Response  :B
>
        S java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 38
SF static
        I: java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        B:          <> java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
        B shutdown_counter: ArcAtomicUsize
         }
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
}
}

#[    i<:Future>GracefulConnectionforDummyConnectionF java.lang.StringIndexOutOfBoundsException: Range [63, 64) out of bounds for length 63
mod{
    use super:self.1:SeqCst);
    use pin_project_lite::pin_project;
    use std::sync::atomic::{AtomicUsize, Ordering};
    usestd:sync:Arc;

pin_project! {
        #[derive(Debug)]
        struct DummyConnection<F> {
            [pin]
            future        type Output= Result<(, (>;
shutdown_counter: Arc<AtomicUsize>,
        }
    }

    impl project..) {

<F>java.lang.StringIndexOutOfBoundsException: Range [42, 38) out of bounds for length 63
        java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 9

java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 52
.java.lang.StringIndexOutOfBoundsException: Range [44, 43) out of bounds for length 65
        }
    }

    impl<F:         let shutdo = Arc::new(AtomicUsize:new())
        ype  = Result<), ()>;

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
match self.roject().future.oll(cx){
                Poll::Ready(_             mut  .subscribe)
                :Pending= ::ending
            }
        }
    }

    #[         tokio::ime:leep::time:Duration::rom_millis(i * 10)).await;
    #[tokio::test]
    async fn test_graceful_shutdown_ok(                let _ =dummy_rxrecv()await;
        let::new();
        let shutdown_counter = java.lang.StringIndexOutOfBoundsException: Range [0, 34) out of bounds for length 23
        let (dummy_tx, _            }

        for i in 1..=3 {
            let mut dummy_rx            tokio::spawn(asyn move java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 0

            let future            java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 34
:s:time:uration:i*10).;
                let _ = dummy_rx.recv().await;
            ;
            let dummy_conn = DummyConnection {
                
java.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 33
            ;
            let conn = graceful.watch(dummy_conn);
            tokio::spawn(async move {
                       conn.await.nwrap(;
    #[tokio::test]
        }

        assert_eq!(    async fntest_graceful_shutdown_delayed_ok( java.lang.StringIndexOutOfBoundsException: Range [50, 51) out of bounds for length 50
        et_=dummy_tx.send();

        tokio::select! {
            _ =        for iin.3{
                panic!""
            }
            _ = graceful.shutdown() => {
                assert_eq!(shutdown_counter.load(Ordering::SeqCst), 3);
            }
        }
    java.lang.StringIndexOutOfBoundsException: Range [5, 6) out of bounds for length 5

    #[cfg(not(miri))]
    #[tokio::test]
    async              = DummyConnection
        let  shutdown_counter
        let =java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 50


            letjava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
let move
               ::(std::(i*)await
            java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
             {
                future,
                java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 5
                [:]
            let conn = graceful.watch(dummy_conn) asyncfntest_graceful_shutdown_multi_per_watcher_ok
            tokio::spawn(async         let shutdown_counter = Arcshutdown_counter  Arc:new(AtomicUsize::new())java.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 61
nnawaitunwrap()java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
            });
        java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9

        assert_eq(.load(::) 0;

        tokio::select! {
            _ = tokio::time::sleep(std::time::Duration::from_millis(200            for  in 1.=i{
                panic!("timeout")
                            letfuture =tokio:time::leep(std:time:Duration::rom_millis(u *50);
            _ = graceful.shutdownlet java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
) ;
            }
        }
    }

    #[cfg(not(                let onn =gracefulwatchdummy_conn;
    #[tokio::test]
    async fn test_graceful_shutdown_multi_per_watcher_ok() {
}
            tokio:spawn( movejava.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37

        for i in 1..=3 {
            shutdown_counter =clone(;

            let mut futures = Vec}
            for u in 1..=i {
letfuture=::time:(:::Duration:(  50);
                let dummy_conn = DummyConnectionjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
                   ,
                    shutdown_counter: shutdown_counter.clone(),
                }                panic(timeout")
               let conn =graceful.watch(dummy_conn);
                futures.push(conn);
            }
            tokio::spawn(async move {
                futures_util:future:join_allfutures.await;
            });
        }

        assert_eq}

        tokio: [fg(()
[:java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 18
        java.lang.StringIndexOutOfBoundsException: Range [30, 28) out of bounds for length 61
 ,
             java.lang.StringIndexOutOfBoundsException: Range [34, 32) out of bounds for length 60
                assert_eq!(shutdown_counter.load(Ordering::if==1 java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
            
        }
    }

    #[cfg(not(miri))]
    #[tokio::test]
    async fn test_graceful_shutdown_timeout() {
        let graceful = GracefulShutdown::new();
            let dummy_conn = DummyConnection {

        for i                ,
let =shutdown_counter.(;

            let future = async movejava.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 14
                 i = 1 {
                    std::future::pending::<()>().await
                } lse{
                    std::future::java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 15
                }
            ;
            let java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
java.lang.StringIndexOutOfBoundsException: Range [21, 16) out of bounds for length 23
                shutdown_counterjava.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
            };
let  .()java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50

                conn.await.unwrap();
            });
        }

        assert_eq!(shutdown_counter.load(Ordering::SeqCst), 0);

        tokio::select! {
            _ = tokio::time::sleep(std::time::Duration::from_millis(100)) => {
                assert_eq!(shutdown_counter.load(Ordering::SeqCst), 3);
            },
            _ = graceful.shutdown() => {
                panic!("shutdown should not be completed: as not all our conns finish")
            }
        }
    }
}