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executor.go
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executor.go
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package xxl
import (
"context"
"encoding/json"
"io/ioutil"
"log"
"net/http"
"os"
"os/signal"
"strings"
"sync"
"syscall"
"time"
)
// Executor 执行器
type Executor interface {
// Init 初始化
Init(...Option)
// LogHandler 日志查询
LogHandler(handler LogHandler)
// Use 使用中间件
Use(middlewares ...Middleware)
// RegTask 注册任务
RegTask(pattern string, task TaskFunc)
// RunTask 运行任务
RunTask(writer http.ResponseWriter, request *http.Request)
// KillTask 杀死任务
KillTask(writer http.ResponseWriter, request *http.Request)
// TaskLog 任务日志
TaskLog(writer http.ResponseWriter, request *http.Request)
// Beat 心跳检测
Beat(writer http.ResponseWriter, request *http.Request)
// IdleBeat 忙碌检测
IdleBeat(writer http.ResponseWriter, request *http.Request)
// Run 运行服务
Run() error
// Stop 停止服务
Stop()
}
// NewExecutor 创建执行器
func NewExecutor(opts ...Option) Executor {
return newExecutor(opts...)
}
func newExecutor(opts ...Option) *executor {
options := newOptions(opts...)
e := &executor{
opts: options,
}
return e
}
type executor struct {
opts Options
address string
regList *taskList //注册任务列表
runList *taskList //正在执行任务列表
mu sync.RWMutex
log Logger
logHandler LogHandler //日志查询handler
middlewares []Middleware //中间件
}
func (e *executor) Init(opts ...Option) {
for _, o := range opts {
o(&e.opts)
}
e.log = e.opts.l
e.regList = &taskList{
data: make(map[string]*Task),
}
e.runList = &taskList{
data: make(map[string]*Task),
}
e.address = e.opts.ExecutorIp + ":" + e.opts.ExecutorPort
go e.registry()
}
// LogHandler 日志handler
func (e *executor) LogHandler(handler LogHandler) {
e.logHandler = handler
}
func (e *executor) Use(middlewares ...Middleware) {
e.middlewares = middlewares
}
func (e *executor) Run() (err error) {
// 创建路由器
mux := http.NewServeMux()
// 设置路由规则
mux.HandleFunc("/run", e.runTask)
mux.HandleFunc("/kill", e.killTask)
mux.HandleFunc("/log", e.taskLog)
mux.HandleFunc("/beat", e.beat)
mux.HandleFunc("/idleBeat", e.idleBeat)
// 创建服务器
server := &http.Server{
Addr: ":" + e.opts.ExecutorPort,
WriteTimeout: time.Second * 3,
Handler: mux,
}
// 监听端口并提供服务
e.log.Info("Starting server at " + e.address)
go server.ListenAndServe()
quit := make(chan os.Signal)
signal.Notify(quit, syscall.SIGKILL, syscall.SIGQUIT, syscall.SIGINT, syscall.SIGTERM)
<-quit
e.registryRemove()
return nil
}
func (e *executor) Stop() {
e.registryRemove()
}
// RegTask 注册任务
func (e *executor) RegTask(pattern string, task TaskFunc) {
var t = &Task{}
t.fn = e.chain(task)
e.regList.Set(pattern, t)
return
}
// 运行一个任务
func (e *executor) runTask(writer http.ResponseWriter, request *http.Request) {
e.mu.Lock()
defer e.mu.Unlock()
req, _ := ioutil.ReadAll(request.Body)
param := &RunReq{}
err := json.Unmarshal(req, ¶m)
if err != nil {
_, _ = writer.Write(returnCall(param, FailureCode, "params err"))
e.log.Error("参数解析错误:" + string(req))
return
}
e.log.Info("任务参数:%v", param)
if !e.regList.Exists(param.ExecutorHandler) {
_, _ = writer.Write(returnCall(param, FailureCode, "Task not registered"))
e.log.Error("任务[" + Int64ToStr(param.JobID) + "]没有注册:" + param.ExecutorHandler)
return
}
//阻塞策略处理
if e.runList.Exists(Int64ToStr(param.JobID)) {
if param.ExecutorBlockStrategy == coverEarly { //覆盖之前调度
oldTask := e.runList.Get(Int64ToStr(param.JobID))
if oldTask != nil {
oldTask.Cancel()
e.runList.Del(Int64ToStr(oldTask.Id))
}
} else { //单机串行,丢弃后续调度 都进行阻塞
_, _ = writer.Write(returnCall(param, FailureCode, "There are tasks running"))
e.log.Error("任务[" + Int64ToStr(param.JobID) + "]已经在运行了:" + param.ExecutorHandler)
return
}
}
cxt := context.Background()
task := e.regList.Get(param.ExecutorHandler)
if param.ExecutorTimeout > 0 {
task.Ext, task.Cancel = context.WithTimeout(cxt, time.Duration(param.ExecutorTimeout)*time.Second)
} else {
task.Ext, task.Cancel = context.WithCancel(cxt)
}
task.Id = param.JobID
task.Name = param.ExecutorHandler
task.Param = param
task.log = e.log
e.runList.Set(Int64ToStr(task.Id), task)
go task.Run(func(code int64, msg string) {
e.callback(task, code, msg)
})
e.log.Info("任务[" + Int64ToStr(param.JobID) + "]开始执行:" + param.ExecutorHandler)
_, _ = writer.Write(returnGeneral())
}
// 删除一个任务
func (e *executor) killTask(writer http.ResponseWriter, request *http.Request) {
e.mu.Lock()
defer e.mu.Unlock()
req, _ := ioutil.ReadAll(request.Body)
param := &killReq{}
_ = json.Unmarshal(req, ¶m)
if !e.runList.Exists(Int64ToStr(param.JobID)) {
_, _ = writer.Write(returnKill(param, FailureCode))
e.log.Error("任务[" + Int64ToStr(param.JobID) + "]没有运行")
return
}
task := e.runList.Get(Int64ToStr(param.JobID))
task.Cancel()
e.runList.Del(Int64ToStr(param.JobID))
_, _ = writer.Write(returnGeneral())
}
// 任务日志
func (e *executor) taskLog(writer http.ResponseWriter, request *http.Request) {
var res *LogRes
data, err := ioutil.ReadAll(request.Body)
req := &LogReq{}
if err != nil {
e.log.Error("日志请求失败:" + err.Error())
reqErrLogHandler(writer, req, err)
return
}
err = json.Unmarshal(data, &req)
if err != nil {
e.log.Error("日志请求解析失败:" + err.Error())
reqErrLogHandler(writer, req, err)
return
}
e.log.Info("日志请求参数:%+v", req)
if e.logHandler != nil {
res = e.logHandler(req)
} else {
res = defaultLogHandler(req)
}
str, _ := json.Marshal(res)
_, _ = writer.Write(str)
}
// 心跳检测
func (e *executor) beat(writer http.ResponseWriter, request *http.Request) {
e.log.Info("心跳检测")
_, _ = writer.Write(returnGeneral())
}
// 忙碌检测
func (e *executor) idleBeat(writer http.ResponseWriter, request *http.Request) {
e.mu.Lock()
defer e.mu.Unlock()
defer request.Body.Close()
req, _ := ioutil.ReadAll(request.Body)
param := &idleBeatReq{}
err := json.Unmarshal(req, ¶m)
if err != nil {
_, _ = writer.Write(returnIdleBeat(FailureCode))
e.log.Error("参数解析错误:" + string(req))
return
}
if e.runList.Exists(Int64ToStr(param.JobID)) {
_, _ = writer.Write(returnIdleBeat(FailureCode))
e.log.Error("idleBeat任务[" + Int64ToStr(param.JobID) + "]正在运行")
return
}
e.log.Info("忙碌检测任务参数:%v", param)
_, _ = writer.Write(returnGeneral())
}
// 注册执行器到调度中心
func (e *executor) registry() {
t := time.NewTimer(time.Second * 0) //初始立即执行
defer t.Stop()
req := &Registry{
RegistryGroup: "EXECUTOR",
RegistryKey: e.opts.RegistryKey,
RegistryValue: "http://" + e.address,
}
param, err := json.Marshal(req)
if err != nil {
log.Fatal("执行器注册信息解析失败:" + err.Error())
}
for {
<-t.C
t.Reset(time.Second * time.Duration(20)) //20秒心跳防止过期
func() {
result, err := e.post("/api/registry", string(param))
if err != nil {
e.log.Error("执行器注册失败1:" + err.Error())
return
}
defer result.Body.Close()
body, err := ioutil.ReadAll(result.Body)
if err != nil {
e.log.Error("执行器注册失败2:" + err.Error())
return
}
res := &res{}
_ = json.Unmarshal(body, &res)
if res.Code != SuccessCode {
e.log.Error("执行器注册失败3:" + string(body))
return
}
e.log.Info("执行器注册成功:" + string(body))
}()
}
}
// 执行器注册摘除
func (e *executor) registryRemove() {
t := time.NewTimer(time.Second * 0) //初始立即执行
defer t.Stop()
req := &Registry{
RegistryGroup: "EXECUTOR",
RegistryKey: e.opts.RegistryKey,
RegistryValue: "http://" + e.address,
}
param, err := json.Marshal(req)
if err != nil {
e.log.Error("执行器摘除失败:" + err.Error())
return
}
res, err := e.post("/api/registryRemove", string(param))
if err != nil {
e.log.Error("执行器摘除失败:" + err.Error())
return
}
defer res.Body.Close()
body, err := ioutil.ReadAll(res.Body)
e.log.Info("执行器摘除成功:" + string(body))
}
// 回调任务列表
func (e *executor) callback(task *Task, code int64, msg string) {
e.runList.Del(Int64ToStr(task.Id))
res, err := e.post("/api/callback", string(returnCall(task.Param, code, msg)))
if err != nil {
e.log.Error("callback err : ", err.Error())
return
}
defer res.Body.Close()
body, err := ioutil.ReadAll(res.Body)
if err != nil {
e.log.Error("callback ReadAll err : ", err.Error())
return
}
e.log.Info("任务回调成功:" + string(body))
}
// post
func (e *executor) post(action, body string) (resp *http.Response, err error) {
request, err := http.NewRequest("POST", e.opts.ServerAddr+action, strings.NewReader(body))
if err != nil {
return nil, err
}
request.Header.Set("Content-Type", "application/json;charset=UTF-8")
request.Header.Set("XXL-JOB-ACCESS-TOKEN", e.opts.AccessToken)
client := http.Client{
Timeout: e.opts.Timeout,
}
return client.Do(request)
}
// RunTask 运行任务
func (e *executor) RunTask(writer http.ResponseWriter, request *http.Request) {
e.runTask(writer, request)
}
// KillTask 删除任务
func (e *executor) KillTask(writer http.ResponseWriter, request *http.Request) {
e.killTask(writer, request)
}
// TaskLog 任务日志
func (e *executor) TaskLog(writer http.ResponseWriter, request *http.Request) {
e.taskLog(writer, request)
}
// Beat 心跳检测
func (e *executor) Beat(writer http.ResponseWriter, request *http.Request) {
e.beat(writer, request)
}
// IdleBeat 忙碌检测
func (e *executor) IdleBeat(writer http.ResponseWriter, request *http.Request) {
e.idleBeat(writer, request)
}