forked from linclin/gopub
/
base.go
108 lines (93 loc) · 2.24 KB
/
base.go
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package common
import (
"errors"
"fmt"
"sync/atomic"
"github.com/julienschmidt/httprouter"
"log"
"net/http"
"os"
)
type Service interface {
Start() error
Stop() bool
OnStart(c *Config, e *httprouter.Router) error
OnStop(c *Config, e *httprouter.Router)
IsRunning() bool
}
type BaseService struct {
name string
running uint32 // atomic
Cfg *Config
httprouter *httprouter.Router
svc Service
}
func NewBaseService(cfg *Config, name string, svc Service) *BaseService {
return &BaseService{
name: name,
running: 0,
Cfg: cfg,
httprouter: httprouter.New(),
svc: svc,
}
}
// init log by config
func (s *BaseService) initlog() {
//以后添加日志模块
}
func (s *BaseService) runHttprouter() error {
net := s.Cfg.Net
log.Printf("Starting http server %s:%v", net.IP, net.MgntPort)
err := http.ListenAndServe(fmt.Sprintf(":%d", net.MgntPort), s.httprouter)
if err != nil {
log.Printf("Start http server %s:%v failed %v", net.IP, net.MgntPort, err)
return err
}
return nil
}
func (s *BaseService) Start() error {
if atomic.CompareAndSwapUint32(&s.running, 0, 1) {
s.initlog()
log.Printf("Starting %s", s.name)
if err := s.svc.OnStart(s.Cfg, s.httprouter); err != nil {
return err
}
go func() {
err := s.runHttprouter()
if err != nil && !s.Cfg.Server {
os.Exit(1)
}
}()
return nil
} else {
return errors.New("Started aleadry.")
}
}
func (s *BaseService) OnStart(c *Config, e *httprouter.Router) error { return nil }
func (s *BaseService) Stop() bool {
if atomic.CompareAndSwapUint32(&s.running, 1, 0) {
log.Printf("Stopping %s", s.name)
s.svc.OnStop(s.Cfg, s.httprouter)
return true
} else {
return false
}
}
// Implements Service
func (s *BaseService) OnStop(c *Config, e *httprouter.Router) {}
// Implements Service
func (s *BaseService) IsRunning() bool {
return atomic.LoadUint32(&s.running) == 1
}
func (s *BaseService) Auth(u, p string) bool {
if u == s.Cfg.Auth.Username && p == s.Cfg.Auth.Password {
return true
}
return false
}
// checks whether a file or directory exists.
// It returns false when the file or directory does not exist.
func FileExist(path string) bool {
_, err := os.Stat(path)
return err == nil || os.IsExist(err)
}