mirror of
https://github.com/astaxie/beego.git
synced 2024-11-21 21:10:55 +00:00
635 lines
14 KiB
Go
635 lines
14 KiB
Go
// Copyright 2014 beego Author. All Rights Reserved.
|
||
//
|
||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
// you may not use this file except in compliance with the License.
|
||
// You may obtain a copy of the License at
|
||
//
|
||
// http://www.apache.org/licenses/LICENSE-2.0
|
||
//
|
||
// Unless required by applicable law or agreed to in writing, software
|
||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
// See the License for the specific language governing permissions and
|
||
// limitations under the License.
|
||
|
||
package toolbox
|
||
|
||
import (
|
||
"log"
|
||
"math"
|
||
"sort"
|
||
"strconv"
|
||
"strings"
|
||
"sync"
|
||
"time"
|
||
)
|
||
|
||
// bounds provides a range of acceptable values (plus a map of name to value).
|
||
type bounds struct {
|
||
min, max uint
|
||
names map[string]uint
|
||
}
|
||
|
||
// The bounds for each field.
|
||
var (
|
||
AdminTaskList map[string]Tasker
|
||
taskLock sync.RWMutex
|
||
stop chan bool
|
||
changed chan bool
|
||
isstart bool
|
||
seconds = bounds{0, 59, nil}
|
||
minutes = bounds{0, 59, nil}
|
||
hours = bounds{0, 23, nil}
|
||
days = bounds{1, 31, nil}
|
||
months = bounds{1, 12, map[string]uint{
|
||
"jan": 1,
|
||
"feb": 2,
|
||
"mar": 3,
|
||
"apr": 4,
|
||
"may": 5,
|
||
"jun": 6,
|
||
"jul": 7,
|
||
"aug": 8,
|
||
"sep": 9,
|
||
"oct": 10,
|
||
"nov": 11,
|
||
"dec": 12,
|
||
}}
|
||
weeks = bounds{0, 6, map[string]uint{
|
||
"sun": 0,
|
||
"mon": 1,
|
||
"tue": 2,
|
||
"wed": 3,
|
||
"thu": 4,
|
||
"fri": 5,
|
||
"sat": 6,
|
||
}}
|
||
)
|
||
|
||
const (
|
||
// Set the top bit if a star was included in the expression.
|
||
starBit = 1 << 63
|
||
)
|
||
|
||
// Schedule time taks schedule
|
||
type Schedule struct {
|
||
Second uint64
|
||
Minute uint64
|
||
Hour uint64
|
||
Day uint64
|
||
Month uint64
|
||
Week uint64
|
||
}
|
||
|
||
// TaskFunc task func type
|
||
type TaskFunc func() error
|
||
|
||
// Tasker task interface
|
||
type Tasker interface {
|
||
GetSpec() string
|
||
GetStatus() string
|
||
Run() error
|
||
SetNext(time.Time)
|
||
GetNext() time.Time
|
||
SetPrev(time.Time)
|
||
GetPrev() time.Time
|
||
}
|
||
|
||
// task error
|
||
type taskerr struct {
|
||
t time.Time
|
||
errinfo string
|
||
}
|
||
|
||
// Task task struct
|
||
type Task struct {
|
||
Taskname string
|
||
Spec *Schedule
|
||
SpecStr string
|
||
DoFunc TaskFunc
|
||
Prev time.Time
|
||
Next time.Time
|
||
Errlist []*taskerr // like errtime:errinfo
|
||
ErrLimit int // max length for the errlist, 0 stand for no limit
|
||
}
|
||
|
||
// NewTask add new task with name, time and func
|
||
func NewTask(tname string, spec string, f TaskFunc) *Task {
|
||
|
||
task := &Task{
|
||
Taskname: tname,
|
||
DoFunc: f,
|
||
ErrLimit: 100,
|
||
SpecStr: spec,
|
||
}
|
||
task.SetCron(spec)
|
||
return task
|
||
}
|
||
|
||
// GetSpec get spec string
|
||
func (t *Task) GetSpec() string {
|
||
return t.SpecStr
|
||
}
|
||
|
||
// GetStatus get current task status
|
||
func (t *Task) GetStatus() string {
|
||
var str string
|
||
for _, v := range t.Errlist {
|
||
str += v.t.String() + ":" + v.errinfo + "<br>"
|
||
}
|
||
return str
|
||
}
|
||
|
||
// Run run all tasks
|
||
func (t *Task) Run() error {
|
||
err := t.DoFunc()
|
||
if err != nil {
|
||
if t.ErrLimit > 0 && t.ErrLimit > len(t.Errlist) {
|
||
t.Errlist = append(t.Errlist, &taskerr{t: t.Next, errinfo: err.Error()})
|
||
}
|
||
}
|
||
return err
|
||
}
|
||
|
||
// SetNext set next time for this task
|
||
func (t *Task) SetNext(now time.Time) {
|
||
t.Next = t.Spec.Next(now)
|
||
}
|
||
|
||
// GetNext get the next call time of this task
|
||
func (t *Task) GetNext() time.Time {
|
||
return t.Next
|
||
}
|
||
|
||
// SetPrev set prev time of this task
|
||
func (t *Task) SetPrev(now time.Time) {
|
||
t.Prev = now
|
||
}
|
||
|
||
// GetPrev get prev time of this task
|
||
func (t *Task) GetPrev() time.Time {
|
||
return t.Prev
|
||
}
|
||
|
||
// six columns mean：
|
||
// second：0-59
|
||
// minute：0-59
|
||
// hour：1-23
|
||
// day：1-31
|
||
// month：1-12
|
||
// week：0-6（0 means Sunday）
|
||
|
||
// SetCron some signals：
|
||
// *： any time
|
||
// ,： separate signal
|
||
// －：duration
|
||
// /n : do as n times of time duration
|
||
/////////////////////////////////////////////////////////
|
||
// 0/30 * * * * * every 30s
|
||
// 0 43 21 * * * 21:43
|
||
// 0 15 05 * * * 05:15
|
||
// 0 0 17 * * * 17:00
|
||
// 0 0 17 * * 1 17:00 in every Monday
|
||
// 0 0,10 17 * * 0,2,3 17:00 and 17:10 in every Sunday, Tuesday and Wednesday
|
||
// 0 0-10 17 1 * * 17:00 to 17:10 in 1 min duration each time on the first day of month
|
||
// 0 0 0 1,15 * 1 0:00 on the 1st day and 15th day of month
|
||
// 0 42 4 1 * * 4:42 on the 1st day of month
|
||
// 0 0 21 * * 1-6 21:00 from Monday to Saturday
|
||
// 0 0,10,20,30,40,50 * * * * every 10 min duration
|
||
// 0 */10 * * * * every 10 min duration
|
||
// 0 * 1 * * * 1:00 to 1:59 in 1 min duration each time
|
||
// 0 0 1 * * * 1:00
|
||
// 0 0 */1 * * * 0 min of hour in 1 hour duration
|
||
// 0 0 * * * * 0 min of hour in 1 hour duration
|
||
// 0 2 8-20/3 * * * 8:02, 11:02, 14:02, 17:02, 20:02
|
||
// 0 30 5 1,15 * * 5:30 on the 1st day and 15th day of month
|
||
func (t *Task) SetCron(spec string) {
|
||
t.Spec = t.parse(spec)
|
||
}
|
||
|
||
func (t *Task) parse(spec string) *Schedule {
|
||
if len(spec) > 0 && spec[0] == '@' {
|
||
return t.parseSpec(spec)
|
||
}
|
||
// Split on whitespace. We require 5 or 6 fields.
|
||
// (second) (minute) (hour) (day of month) (month) (day of week, optional)
|
||
fields := strings.Fields(spec)
|
||
if len(fields) != 5 && len(fields) != 6 {
|
||
log.Panicf("Expected 5 or 6 fields, found %d: %s", len(fields), spec)
|
||
}
|
||
|
||
// If a sixth field is not provided (DayOfWeek), then it is equivalent to star.
|
||
if len(fields) == 5 {
|
||
fields = append(fields, "*")
|
||
}
|
||
|
||
schedule := &Schedule{
|
||
Second: getField(fields[0], seconds),
|
||
Minute: getField(fields[1], minutes),
|
||
Hour: getField(fields[2], hours),
|
||
Day: getField(fields[3], days),
|
||
Month: getField(fields[4], months),
|
||
Week: getField(fields[5], weeks),
|
||
}
|
||
|
||
return schedule
|
||
}
|
||
|
||
func (t *Task) parseSpec(spec string) *Schedule {
|
||
switch spec {
|
||
case "@yearly", "@annually":
|
||
return &Schedule{
|
||
Second: 1 << seconds.min,
|
||
Minute: 1 << minutes.min,
|
||
Hour: 1 << hours.min,
|
||
Day: 1 << days.min,
|
||
Month: 1 << months.min,
|
||
Week: all(weeks),
|
||
}
|
||
|
||
case "@monthly":
|
||
return &Schedule{
|
||
Second: 1 << seconds.min,
|
||
Minute: 1 << minutes.min,
|
||
Hour: 1 << hours.min,
|
||
Day: 1 << days.min,
|
||
Month: all(months),
|
||
Week: all(weeks),
|
||
}
|
||
|
||
case "@weekly":
|
||
return &Schedule{
|
||
Second: 1 << seconds.min,
|
||
Minute: 1 << minutes.min,
|
||
Hour: 1 << hours.min,
|
||
Day: all(days),
|
||
Month: all(months),
|
||
Week: 1 << weeks.min,
|
||
}
|
||
|
||
case "@daily", "@midnight":
|
||
return &Schedule{
|
||
Second: 1 << seconds.min,
|
||
Minute: 1 << minutes.min,
|
||
Hour: 1 << hours.min,
|
||
Day: all(days),
|
||
Month: all(months),
|
||
Week: all(weeks),
|
||
}
|
||
|
||
case "@hourly":
|
||
return &Schedule{
|
||
Second: 1 << seconds.min,
|
||
Minute: 1 << minutes.min,
|
||
Hour: all(hours),
|
||
Day: all(days),
|
||
Month: all(months),
|
||
Week: all(weeks),
|
||
}
|
||
}
|
||
log.Panicf("Unrecognized descriptor: %s", spec)
|
||
return nil
|
||
}
|
||
|
||
// Next set schedule to next time
|
||
func (s *Schedule) Next(t time.Time) time.Time {
|
||
|
||
// Start at the earliest possible time (the upcoming second).
|
||
t = t.Add(1*time.Second - time.Duration(t.Nanosecond())*time.Nanosecond)
|
||
|
||
// This flag indicates whether a field has been incremented.
|
||
added := false
|
||
|
||
// If no time is found within five years, return zero.
|
||
yearLimit := t.Year() + 5
|
||
|
||
WRAP:
|
||
if t.Year() > yearLimit {
|
||
return time.Time{}
|
||
}
|
||
|
||
// Find the first applicable month.
|
||
// If it's this month, then do nothing.
|
||
for 1<<uint(t.Month())&s.Month == 0 {
|
||
// If we have to add a month, reset the other parts to 0.
|
||
if !added {
|
||
added = true
|
||
// Otherwise, set the date at the beginning (since the current time is irrelevant).
|
||
t = time.Date(t.Year(), t.Month(), 1, 0, 0, 0, 0, t.Location())
|
||
}
|
||
t = t.AddDate(0, 1, 0)
|
||
|
||
// Wrapped around.
|
||
if t.Month() == time.January {
|
||
goto WRAP
|
||
}
|
||
}
|
||
|
||
// Now get a day in that month.
|
||
for !dayMatches(s, t) {
|
||
if !added {
|
||
added = true
|
||
t = time.Date(t.Year(), t.Month(), t.Day(), 0, 0, 0, 0, t.Location())
|
||
}
|
||
t = t.AddDate(0, 0, 1)
|
||
|
||
if t.Day() == 1 {
|
||
goto WRAP
|
||
}
|
||
}
|
||
|
||
for 1<<uint(t.Hour())&s.Hour == 0 {
|
||
if !added {
|
||
added = true
|
||
t = time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), 0, 0, 0, t.Location())
|
||
}
|
||
t = t.Add(1 * time.Hour)
|
||
|
||
if t.Hour() == 0 {
|
||
goto WRAP
|
||
}
|
||
}
|
||
|
||
for 1<<uint(t.Minute())&s.Minute == 0 {
|
||
if !added {
|
||
added = true
|
||
t = time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), 0, 0, t.Location())
|
||
}
|
||
t = t.Add(1 * time.Minute)
|
||
|
||
if t.Minute() == 0 {
|
||
goto WRAP
|
||
}
|
||
}
|
||
|
||
for 1<<uint(t.Second())&s.Second == 0 {
|
||
if !added {
|
||
added = true
|
||
t = time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second(), 0, t.Location())
|
||
}
|
||
t = t.Add(1 * time.Second)
|
||
|
||
if t.Second() == 0 {
|
||
goto WRAP
|
||
}
|
||
}
|
||
|
||
return t
|
||
}
|
||
|
||
func dayMatches(s *Schedule, t time.Time) bool {
|
||
var (
|
||
domMatch = 1<<uint(t.Day())&s.Day > 0
|
||
dowMatch = 1<<uint(t.Weekday())&s.Week > 0
|
||
)
|
||
|
||
if s.Day&starBit > 0 || s.Week&starBit > 0 {
|
||
return domMatch && dowMatch
|
||
}
|
||
return domMatch || dowMatch
|
||
}
|
||
|
||
// StartTask start all tasks
|
||
func StartTask() {
|
||
taskLock.Lock()
|
||
defer taskLock.Unlock()
|
||
if isstart {
|
||
//If already started， no need to start another goroutine.
|
||
return
|
||
}
|
||
isstart = true
|
||
go run()
|
||
}
|
||
|
||
func run() {
|
||
now := time.Now().Local()
|
||
for _, t := range AdminTaskList {
|
||
t.SetNext(now)
|
||
}
|
||
|
||
for {
|
||
// we only use RLock here because NewMapSorter copy the reference, do not change any thing
|
||
taskLock.RLock()
|
||
sortList := NewMapSorter(AdminTaskList)
|
||
taskLock.RUnlock()
|
||
sortList.Sort()
|
||
var effective time.Time
|
||
if len(AdminTaskList) == 0 || sortList.Vals[0].GetNext().IsZero() {
|
||
// If there are no entries yet, just sleep - it still handles new entries
|
||
// and stop requests.
|
||
effective = now.AddDate(10, 0, 0)
|
||
} else {
|
||
effective = sortList.Vals[0].GetNext()
|
||
}
|
||
select {
|
||
case now = <-time.After(effective.Sub(now)):
|
||
// Run every entry whose next time was this effective time.
|
||
for _, e := range sortList.Vals {
|
||
if e.GetNext() != effective {
|
||
break
|
||
}
|
||
go e.Run()
|
||
e.SetPrev(e.GetNext())
|
||
e.SetNext(effective)
|
||
}
|
||
continue
|
||
case <-changed:
|
||
now = time.Now().Local()
|
||
taskLock.Lock()
|
||
for _, t := range AdminTaskList {
|
||
t.SetNext(now)
|
||
}
|
||
taskLock.Unlock()
|
||
continue
|
||
case <-stop:
|
||
return
|
||
}
|
||
}
|
||
}
|
||
|
||
// StopTask stop all tasks
|
||
func StopTask() {
|
||
taskLock.Lock()
|
||
defer taskLock.Unlock()
|
||
if isstart {
|
||
isstart = false
|
||
stop <- true
|
||
}
|
||
|
||
}
|
||
|
||
// AddTask add task with name
|
||
func AddTask(taskname string, t Tasker) {
|
||
taskLock.Lock()
|
||
defer taskLock.Unlock()
|
||
t.SetNext(time.Now().Local())
|
||
AdminTaskList[taskname] = t
|
||
if isstart {
|
||
changed <- true
|
||
}
|
||
}
|
||
|
||
// DeleteTask delete task with name
|
||
func DeleteTask(taskname string) {
|
||
taskLock.Lock()
|
||
defer taskLock.Unlock()
|
||
delete(AdminTaskList, taskname)
|
||
if isstart {
|
||
changed <- true
|
||
}
|
||
}
|
||
|
||
// MapSorter sort map for tasker
|
||
type MapSorter struct {
|
||
Keys []string
|
||
Vals []Tasker
|
||
}
|
||
|
||
// NewMapSorter create new tasker map
|
||
func NewMapSorter(m map[string]Tasker) *MapSorter {
|
||
ms := &MapSorter{
|
||
Keys: make([]string, 0, len(m)),
|
||
Vals: make([]Tasker, 0, len(m)),
|
||
}
|
||
for k, v := range m {
|
||
ms.Keys = append(ms.Keys, k)
|
||
ms.Vals = append(ms.Vals, v)
|
||
}
|
||
return ms
|
||
}
|
||
|
||
// Sort sort tasker map
|
||
func (ms *MapSorter) Sort() {
|
||
sort.Sort(ms)
|
||
}
|
||
|
||
func (ms *MapSorter) Len() int { return len(ms.Keys) }
|
||
func (ms *MapSorter) Less(i, j int) bool {
|
||
if ms.Vals[i].GetNext().IsZero() {
|
||
return false
|
||
}
|
||
if ms.Vals[j].GetNext().IsZero() {
|
||
return true
|
||
}
|
||
return ms.Vals[i].GetNext().Before(ms.Vals[j].GetNext())
|
||
}
|
||
func (ms *MapSorter) Swap(i, j int) {
|
||
ms.Vals[i], ms.Vals[j] = ms.Vals[j], ms.Vals[i]
|
||
ms.Keys[i], ms.Keys[j] = ms.Keys[j], ms.Keys[i]
|
||
}
|
||
|
||
func getField(field string, r bounds) uint64 {
|
||
// list = range {"," range}
|
||
var bits uint64
|
||
ranges := strings.FieldsFunc(field, func(r rune) bool { return r == ',' })
|
||
for _, expr := range ranges {
|
||
bits |= getRange(expr, r)
|
||
}
|
||
return bits
|
||
}
|
||
|
||
// getRange returns the bits indicated by the given expression:
|
||
// number | number "-" number [ "/" number ]
|
||
func getRange(expr string, r bounds) uint64 {
|
||
|
||
var (
|
||
start, end, step uint
|
||
rangeAndStep = strings.Split(expr, "/")
|
||
lowAndHigh = strings.Split(rangeAndStep[0], "-")
|
||
singleDigit = len(lowAndHigh) == 1
|
||
)
|
||
|
||
var extrastar uint64
|
||
if lowAndHigh[0] == "*" || lowAndHigh[0] == "?" {
|
||
start = r.min
|
||
end = r.max
|
||
extrastar = starBit
|
||
} else {
|
||
start = parseIntOrName(lowAndHigh[0], r.names)
|
||
switch len(lowAndHigh) {
|
||
case 1:
|
||
end = start
|
||
case 2:
|
||
end = parseIntOrName(lowAndHigh[1], r.names)
|
||
default:
|
||
log.Panicf("Too many hyphens: %s", expr)
|
||
}
|
||
}
|
||
|
||
switch len(rangeAndStep) {
|
||
case 1:
|
||
step = 1
|
||
case 2:
|
||
step = mustParseInt(rangeAndStep[1])
|
||
|
||
// Special handling: "N/step" means "N-max/step".
|
||
if singleDigit {
|
||
end = r.max
|
||
}
|
||
default:
|
||
log.Panicf("Too many slashes: %s", expr)
|
||
}
|
||
|
||
if start < r.min {
|
||
log.Panicf("Beginning of range (%d) below minimum (%d): %s", start, r.min, expr)
|
||
}
|
||
if end > r.max {
|
||
log.Panicf("End of range (%d) above maximum (%d): %s", end, r.max, expr)
|
||
}
|
||
if start > end {
|
||
log.Panicf("Beginning of range (%d) beyond end of range (%d): %s", start, end, expr)
|
||
}
|
||
|
||
return getBits(start, end, step) | extrastar
|
||
}
|
||
|
||
// parseIntOrName returns the (possibly-named) integer contained in expr.
|
||
func parseIntOrName(expr string, names map[string]uint) uint {
|
||
if names != nil {
|
||
if namedInt, ok := names[strings.ToLower(expr)]; ok {
|
||
return namedInt
|
||
}
|
||
}
|
||
return mustParseInt(expr)
|
||
}
|
||
|
||
// mustParseInt parses the given expression as an int or panics.
|
||
func mustParseInt(expr string) uint {
|
||
num, err := strconv.Atoi(expr)
|
||
if err != nil {
|
||
log.Panicf("Failed to parse int from %s: %s", expr, err)
|
||
}
|
||
if num < 0 {
|
||
log.Panicf("Negative number (%d) not allowed: %s", num, expr)
|
||
}
|
||
|
||
return uint(num)
|
||
}
|
||
|
||
// getBits sets all bits in the range [min, max], modulo the given step size.
|
||
func getBits(min, max, step uint) uint64 {
|
||
var bits uint64
|
||
|
||
// If step is 1, use shifts.
|
||
if step == 1 {
|
||
return ^(math.MaxUint64 << (max + 1)) & (math.MaxUint64 << min)
|
||
}
|
||
|
||
// Else, use a simple loop.
|
||
for i := min; i <= max; i += step {
|
||
bits |= 1 << i
|
||
}
|
||
return bits
|
||
}
|
||
|
||
// all returns all bits within the given bounds. (plus the star bit)
|
||
func all(r bounds) uint64 {
|
||
return getBits(r.min, r.max, 1) | starBit
|
||
}
|
||
|
||
func init() {
|
||
AdminTaskList = make(map[string]Tasker)
|
||
stop = make(chan bool)
|
||
changed = make(chan bool)
|
||
}
|