mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-28 22:14:20 -04:00
* fix build * take flash error message back and fix more windows lint error * performance optimization * own step to check lint for windows Co-authored-by: 6543 <6543@obermui.de>
210 lines
4.8 KiB
Go
210 lines
4.8 KiB
Go
// +build windows
|
|
|
|
// Copyright 2019 The Gitea Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
// This code is heavily inspired by the archived gofacebook/gracenet/net.go handler
|
|
|
|
package graceful
|
|
|
|
import (
|
|
"context"
|
|
"os"
|
|
"strconv"
|
|
"sync"
|
|
"time"
|
|
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
|
|
"golang.org/x/sys/windows/svc"
|
|
"golang.org/x/sys/windows/svc/debug"
|
|
)
|
|
|
|
// WindowsServiceName is the name of the Windows service
|
|
var WindowsServiceName = "gitea"
|
|
|
|
const (
|
|
hammerCode = 128
|
|
hammerCmd = svc.Cmd(hammerCode)
|
|
acceptHammerCode = svc.Accepted(hammerCode)
|
|
)
|
|
|
|
// Manager manages the graceful shutdown process
|
|
type Manager struct {
|
|
ctx context.Context
|
|
isChild bool
|
|
lock *sync.RWMutex
|
|
state state
|
|
shutdown chan struct{}
|
|
hammer chan struct{}
|
|
terminate chan struct{}
|
|
done chan struct{}
|
|
runningServerWaitGroup sync.WaitGroup
|
|
createServerWaitGroup sync.WaitGroup
|
|
terminateWaitGroup sync.WaitGroup
|
|
shutdownRequested chan struct{}
|
|
}
|
|
|
|
func newGracefulManager(ctx context.Context) *Manager {
|
|
manager := &Manager{
|
|
isChild: false,
|
|
lock: &sync.RWMutex{},
|
|
ctx: ctx,
|
|
}
|
|
manager.createServerWaitGroup.Add(numberOfServersToCreate)
|
|
manager.start()
|
|
return manager
|
|
}
|
|
|
|
func (g *Manager) start() {
|
|
// Make channels
|
|
g.terminate = make(chan struct{})
|
|
g.shutdown = make(chan struct{})
|
|
g.hammer = make(chan struct{})
|
|
g.done = make(chan struct{})
|
|
g.shutdownRequested = make(chan struct{})
|
|
|
|
// Set the running state
|
|
g.setState(stateRunning)
|
|
if skip, _ := strconv.ParseBool(os.Getenv("SKIP_MINWINSVC")); skip {
|
|
return
|
|
}
|
|
|
|
// Make SVC process
|
|
run := svc.Run
|
|
isInteractive, err := svc.IsWindowsService()
|
|
if err != nil {
|
|
log.Error("Unable to ascertain if running as an Interactive Session: %v", err)
|
|
return
|
|
}
|
|
if isInteractive {
|
|
run = debug.Run
|
|
}
|
|
go func() {
|
|
_ = run(WindowsServiceName, g)
|
|
}()
|
|
}
|
|
|
|
// Execute makes Manager implement svc.Handler
|
|
func (g *Manager) Execute(args []string, changes <-chan svc.ChangeRequest, status chan<- svc.Status) (svcSpecificEC bool, exitCode uint32) {
|
|
if setting.StartupTimeout > 0 {
|
|
status <- svc.Status{State: svc.StartPending}
|
|
} else {
|
|
status <- svc.Status{State: svc.StartPending, WaitHint: uint32(setting.StartupTimeout / time.Millisecond)}
|
|
}
|
|
|
|
// Now need to wait for everything to start...
|
|
if !g.awaitServer(setting.StartupTimeout) {
|
|
return false, 1
|
|
}
|
|
|
|
// We need to implement some way of svc.AcceptParamChange/svc.ParamChange
|
|
status <- svc.Status{
|
|
State: svc.Running,
|
|
Accepts: svc.AcceptStop | svc.AcceptShutdown | acceptHammerCode,
|
|
}
|
|
|
|
waitTime := 30 * time.Second
|
|
|
|
loop:
|
|
for {
|
|
select {
|
|
case <-g.ctx.Done():
|
|
g.DoGracefulShutdown()
|
|
waitTime += setting.GracefulHammerTime
|
|
break loop
|
|
case <-g.shutdownRequested:
|
|
waitTime += setting.GracefulHammerTime
|
|
break loop
|
|
case change := <-changes:
|
|
switch change.Cmd {
|
|
case svc.Interrogate:
|
|
status <- change.CurrentStatus
|
|
case svc.Stop, svc.Shutdown:
|
|
g.DoGracefulShutdown()
|
|
waitTime += setting.GracefulHammerTime
|
|
break loop
|
|
case hammerCode:
|
|
g.DoGracefulShutdown()
|
|
g.DoImmediateHammer()
|
|
break loop
|
|
default:
|
|
log.Debug("Unexpected control request: %v", change.Cmd)
|
|
}
|
|
}
|
|
}
|
|
status <- svc.Status{
|
|
State: svc.StopPending,
|
|
WaitHint: uint32(waitTime / time.Millisecond),
|
|
}
|
|
|
|
hammerLoop:
|
|
for {
|
|
select {
|
|
case change := <-changes:
|
|
switch change.Cmd {
|
|
case svc.Interrogate:
|
|
status <- change.CurrentStatus
|
|
case svc.Stop, svc.Shutdown, hammerCmd:
|
|
g.DoImmediateHammer()
|
|
break hammerLoop
|
|
default:
|
|
log.Debug("Unexpected control request: %v", change.Cmd)
|
|
}
|
|
case <-g.hammer:
|
|
break hammerLoop
|
|
}
|
|
}
|
|
return false, 0
|
|
}
|
|
|
|
// DoImmediateHammer causes an immediate hammer
|
|
func (g *Manager) DoImmediateHammer() {
|
|
g.doHammerTime(0 * time.Second)
|
|
}
|
|
|
|
// DoGracefulShutdown causes a graceful shutdown
|
|
func (g *Manager) DoGracefulShutdown() {
|
|
g.lock.Lock()
|
|
select {
|
|
case <-g.shutdownRequested:
|
|
g.lock.Unlock()
|
|
default:
|
|
close(g.shutdownRequested)
|
|
g.lock.Unlock()
|
|
g.doShutdown()
|
|
}
|
|
}
|
|
|
|
// RegisterServer registers the running of a listening server.
|
|
// Any call to RegisterServer must be matched by a call to ServerDone
|
|
func (g *Manager) RegisterServer() {
|
|
g.runningServerWaitGroup.Add(1)
|
|
}
|
|
|
|
func (g *Manager) awaitServer(limit time.Duration) bool {
|
|
c := make(chan struct{})
|
|
go func() {
|
|
defer close(c)
|
|
g.createServerWaitGroup.Wait()
|
|
}()
|
|
if limit > 0 {
|
|
select {
|
|
case <-c:
|
|
return true // completed normally
|
|
case <-time.After(limit):
|
|
return false // timed out
|
|
case <-g.IsShutdown():
|
|
return false
|
|
}
|
|
} else {
|
|
select {
|
|
case <-c:
|
|
return true // completed normally
|
|
case <-g.IsShutdown():
|
|
return false
|
|
}
|
|
}
|
|
}
|