75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package graceful
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import (
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"os"
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"runtime"
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"code.gitea.io/gitea/modules/log"
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)
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// awaitShutdown waits for the shutdown signal from the Manager
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func (srv *Server) awaitShutdown() {
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select {
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case <-GetManager().IsShutdown():
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// Shutdown
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srv.doShutdown()
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case <-GetManager().IsHammer():
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// Hammer
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srv.doShutdown()
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srv.doHammer()
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}
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<-GetManager().IsHammer()
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srv.doHammer()
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}
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// shutdown closes the listener so that no new connections are accepted
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// and starts a goroutine that will hammer (stop all running requests) the server
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// after setting.GracefulHammerTime.
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func (srv *Server) doShutdown() {
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// only shutdown if we're running.
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if srv.getState() != stateRunning {
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return
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}
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srv.setState(stateShuttingDown)
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if srv.OnShutdown != nil {
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srv.OnShutdown()
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}
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err := srv.listener.Close()
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if err != nil {
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log.Error("PID: %d Listener.Close() error: %v", os.Getpid(), err)
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} else {
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log.Info("PID: %d Listener (%s) closed.", os.Getpid(), srv.listener.Addr())
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}
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}
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func (srv *Server) doHammer() {
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defer func() {
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// We call srv.wg.Done() until it panics.
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// This happens if we call Done() when the WaitGroup counter is already at 0
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// So if it panics -> we're done, Serve() will return and the
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// parent will goroutine will exit.
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if r := recover(); r != nil {
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log.Error("WaitGroup at 0: Error: %v", r)
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}
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}()
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if srv.getState() != stateShuttingDown {
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return
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}
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log.Warn("Forcefully shutting down parent")
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for {
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if srv.getState() == stateTerminate {
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break
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}
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srv.wg.Done()
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// Give other goroutines a chance to finish before we forcibly stop them.
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runtime.Gosched()
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}
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}
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