/
service.go
126 lines (103 loc) · 2.36 KB
/
service.go
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package ws
import (
"fmt"
"os"
"strings"
"time"
"golang.org/x/sys/windows/svc"
)
type ServiceManager struct {
name string
displayName string
description string
s *service
inService bool
}
func Service(name, displayName, description string) (*ServiceManager, error) {
sm := &ServiceManager {
name: name,
displayName: displayName,
description: description,
s: &service{
changeHandlers: make(map[svc.Cmd]ChangeHandlerFunc),
},
}
var err error
sm.inService, err = svc.IsWindowsService()
if err != nil {
return nil, fmt.Errorf("failed to determine if we are running in service: %w", err)
}
sm.s.sm = sm
return sm, nil
}
func (sm *ServiceManager) Name() string {
return sm.name
}
func (sm *ServiceManager) DisplayName() string {
return sm.displayName
}
func (sm *ServiceManager) Description() string {
return sm.description
}
func (sm *ServiceManager) IsInService() bool {
return sm.inService
}
func (sm *ServiceManager) Run(handler SvcHandlerFunc) error {
if len(os.Args) > 1 {
var err error
cmd := strings.ToLower(os.Args[1])
switch cmd {
case "install":
err = sm.InstallService(sm.DefaultServiceConfig(), time.Second * 10)
case "remove":
err = sm.RemoveService()
case "start":
err = sm.Start(handler)
case "stop":
err = sm.Stop()
case "pause":
err = sm.Pause()
case "continue":
err = sm.Continue()
default:
cmd = ""
err = sm.Start(handler, os.Args[1:]...)
}
if err != nil {
if cmd == "" {
return fmt.Errorf("%s - error: %w", sm.Name(), err)
}
return fmt.Errorf("%s - error with command <%s>: %w", sm.Name(), cmd, err)
}
return nil
}
return sm.Start(handler)
}
func (sm *ServiceManager) Started() {
sm.s.sendState(svc.Running)
}
type service struct {
sm *ServiceManager
handlerFunc SvcHandlerFunc
state svc.State
changes chan<- svc.Status
changeHandlers map[svc.Cmd]ChangeHandlerFunc
accepts svc.Accepted
}
func (s *service) Execute(args []string, r <-chan svc.ChangeRequest, changes chan<- svc.Status) (ssec bool, errno uint32) {
s.changes = changes
s.sendState(svc.StartPending)
defer func() {
s.changes <- svc.Status{ State: svc.Stopped }
}()
s.execute(args, r, changes)
return
}
func (s *service) execute(args []string, r <-chan svc.ChangeRequest, changes chan<- svc.Status) {
go func() {
for c := range r {
s.handleChange(c)
}
}()
s.handlerFunc(s.sm, args...)
}