/
heaven.go
215 lines (184 loc) · 4.55 KB
/
heaven.go
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package gone
import (
"os"
"os/signal"
"reflect"
"syscall"
"time"
)
// Run 开始运行一个Gone程序;`gone.Run` 和 `gone.Serve` 的区别是:
// 1. gone.Serve启动的程序,主协程会调用 Heaven.WaitEnd 挂起等待停机信号,可以用于服务程序的开发
// 2. gone.Run启动的程序,主协程则不会挂起,运行完就结束,适合开发一致性运行的代码
//
// // 定义加载服务的Priest函数
// func LoadServer(c Cemetery) error {
// c.Bury(goneXorm.New())
// c.Bury(goneGin.New())
// return nil
// }
//
// // 加载组件的Priest函数
// func LoadComponent(c Cemetery) error {
// c.Bury(componentA.New())
// c.Bury(componentB.New())
// }
//
//
// gone.Run(LoadServer, LoadComponent)//开始运行
func Run(priests ...Priest) {
AfterStopSignalWaitSecond = 0
New(priests...).
Install().
Start().
Stop()
}
// Serve 开始服务,参考[Run](#Run)
func Serve(priests ...Priest) {
New(priests...).
Install().
Start().
WaitEnd().
Stop()
}
// New 新建Heaven; Heaven 代表了一个应用程序;
func New(priests ...Priest) Heaven {
cemetery := newCemetery()
h := heaven{
SimpleLogger: &defaultLogger{},
cemetery: cemetery,
priests: priests,
signal: make(chan os.Signal),
stopSignal: make(chan struct{}),
}
h.
cemetery.
Bury(&h, IdGoneHeaven).
Bury(cemetery, IdGoneCemetery)
return &h
}
type heaven struct {
Flag
SimpleLogger `gone:"gone-logger"`
cemetery Cemetery
priests []Priest
beforeStartHandlers []Process
afterStartHandlers []Process
beforeStopHandlers []Process
afterStopHandlers []Process
signal chan os.Signal
stopSignal chan struct{}
}
func getAngelType() reflect.Type {
var angelPtr *Angel = nil
return reflect.TypeOf(angelPtr).Elem()
}
func (h *heaven) SetLogger(logger SimpleLogger) SetLoggerError {
h.SimpleLogger = logger
return nil
}
func (h *heaven) GetHeavenStopSignal() <-chan struct{} {
return h.stopSignal
}
func (h *heaven) burial() {
for _, priest := range h.priests {
err := priest(h.cemetery)
if err != nil {
panic(err)
}
}
}
func (h *heaven) install() {
h.burial()
err := h.cemetery.ReviveAllFromTombs()
h.panicOnError(err)
}
func (h *heaven) installAngelHook() {
angleTombs := h.cemetery.GetTomByType(getAngelType())
for _, tomb := range angleTombs {
angel := tomb.GetGoner().(Angel)
h.BeforeStart(angel.Start)
h.BeforeStop(angel.Stop)
}
}
func (h *heaven) startFlow() {
// start Handlers 顺序调用:先注册的先调用
for _, before := range h.beforeStartHandlers {
err := before(h.cemetery)
h.panicOnError(err)
}
for _, after := range h.afterStartHandlers {
err := after(h.cemetery)
h.panicOnError(err)
}
}
func (h *heaven) panicOnError(err error) {
if err == nil {
return
}
if iErr, ok := err.(InnerError); ok {
h.Errorf("%s\n", iErr.Error())
}
panic(err)
}
func (h *heaven) stopFlow() {
// stop Handlers 逆序调用:先注册的后调用
for i := len(h.beforeStopHandlers) - 1; i >= 0; i-- {
before := h.beforeStopHandlers[i]
err := before(h.cemetery)
h.panicOnError(err)
}
for i := len(h.afterStopHandlers) - 1; i >= 0; i-- {
before := h.afterStopHandlers[i]
err := before(h.cemetery)
h.panicOnError(err)
}
}
func (h *heaven) Install() Heaven {
h.install()
h.installAngelHook()
return h
}
func (h *heaven) Start() Heaven {
h.startFlow()
return h
}
func (h *heaven) WaitEnd() Heaven {
signal.Notify(h.signal, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
s := <-h.signal
h.Infof("gone system will quit for receive signal(%s)\n", s.String())
return h
}
func (h *heaven) End() Heaven {
h.signal <- syscall.SIGINT
return h
}
// AfterStopSignalWaitSecond 收到停机信号后,退出程序等待的时间
var AfterStopSignalWaitSecond = 5
func (h *heaven) Stop() Heaven {
h.stopFlow()
close(h.stopSignal)
if AfterStopSignalWaitSecond > 0 {
h.Infof("WAIT %d SECOND TO STOP!!", AfterStopSignalWaitSecond)
}
for i := 0; i < AfterStopSignalWaitSecond; i++ {
h.Infof("Stop in %d seconds.", AfterStopSignalWaitSecond-i)
<-time.After(time.Second)
}
return h
}
func (h *heaven) BeforeStart(p Process) Heaven {
h.beforeStartHandlers = append([]Process{p}, h.beforeStartHandlers...)
return h
}
func (h *heaven) AfterStart(p Process) Heaven {
h.afterStartHandlers = append(h.afterStartHandlers, p)
return h
}
func (h *heaven) BeforeStop(p Process) Heaven {
h.beforeStopHandlers = append([]Process{p}, h.beforeStopHandlers...)
return h
}
func (h *heaven) AfterStop(p Process) Heaven {
h.afterStopHandlers = append(h.afterStopHandlers, p)
return h
}