追风的浪子
2022-10-21
type Service interface {
// Run should be called shortly after the program entry point.
// After Interface.Stop has finished running, Run will stop blocking.
// After Run stops blocking, the program must exit shortly after.
Run() error
// Start signals to the OS service manager the given service should start.
Start() error
// Stop signals to the OS service manager the given service should stop.
Stop() error
// Restart signals to the OS service manager the given service should stop then start.
Restart() error
// Install setups up the given service in the OS service manager. This may require
// greater rights. Will return an error if it is already installed.
Install() error
// Uninstall removes the given service from the OS service manager. This may require
// greater rights. Will return an error if the service is not present.
Uninstall() error
// Opens and returns a system logger. If the user program is running
// interactively rather then as a service, the returned logger will write to
// os.Stderr. If errs is non-nil errors will be sent on errs as well as
// returned from Logger's functions.
Logger(errs chan<- error) (Logger, error)
// SystemLogger opens and returns a system logger. If errs is non-nil errors
// will be sent on errs as well as returned from Logger's functions.
SystemLogger(errs chan<- error) (Logger, error)
// String displays the name of the service. The display name if present,
// otherwise the name.
String() string
}
type Interface interface {
// Start provides a place to initiate the service. The service doesn't not
// signal a completed start until after this function returns, so the
// Start function must not take more then a few seconds at most.
Start(s Service) error
// Stop provides a place to clean up program execution before it is terminated.
// It should not take more then a few seconds to execute.
// Stop should not call os.Exit directly in the function.
Stop(s Service) error
}
type program struct{}
func (p *program) Start(s service.Service) error {
log.Println("开始服务")
go p.run()
return nil
}
func (p *program) Stop(s service.Service) error {
log.Println("停止服务")
return nil
}
func (p *program) run() {
// 这里放置程序要执行的代码……
}
func main(){
//服务的配置信息
cfg := &service.Config{
Name: "simple",
DisplayName: "a simple service",
Description: "This is an example Go service.",
}
// Interface 接口
prg := &program{}
// 构建服务对象
s, err := service.New(prg, cfg)
if err != nil {
log.Fatal(err)
}
// logger 用于记录系统日志
logger, err := s.Logger(nil)
if err != nil {
log.Fatal(err)
}
if len(os.Args) == 2 { //如果有命令则执行
err = service.Control(s, os.Args[1])
if err != nil {
log.Fatal(err)
}
} else { //否则说明是方法启动了
err = s.Run()
if err != nil {
logger.Error(err)
}
}
if err != nil {
logger.Error(err)
}
}
simple install -- 安装服务
simple start -- 启动服务
simple stop -- 停止服务