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timewheel.go
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timewheel.go
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package timewheel
import (
"encoding/json"
"sync"
"time"
)
// Context 定时器上下文
type Context struct {
Name string `json:"name,omitempty"`
Data map[string]interface{} `json:"data,omitempty"`
}
func NewContext(name string) *Context {
return &Context{
Name: name,
Data: make(map[string]interface{}),
}
}
func (c Context) Val() string {
bytes, err := json.Marshal(c)
if err != nil {
return ""
}
return string(bytes)
}
func getContext(bytes string) *Context {
ctx := Context{}
_ = json.Unmarshal([]byte(bytes), &ctx)
return &ctx
}
type TimeWheel interface {
AddTimer(delay time.Duration, id string, ctx *Context, callId CallId)
RemoveTimer(id string)
Run() TimeWheel
Stop()
}
type CallId int
type Call func(ctx *Context)
type CallPool struct {
calls map[CallId]Call
}
func (pool *CallPool) Add(id CallId, call Call) {
pool.calls[id] = call
}
func (pool *CallPool) Remove(id CallId) {
delete(pool.calls, id)
}
func (pool *CallPool) Exist(id CallId) bool {
if _, ok := pool.calls[id]; ok {
return true
}
return false
}
var pool = CallPool{calls: make(map[CallId]Call)}
// AddCall 添加全剧回调函数
func AddCall(id CallId, call Call) {
pool.Add(id, call)
}
func RemoveCall(id CallId) {
pool.Remove(id)
}
func GetCall(id CallId) Call {
return pool.calls[id]
}
func CallExist(id CallId) bool {
return pool.Exist(id)
}
type Target struct {
Id string `json:"id"`
Delay int64 `json:"delay"`
Circle int `json:"circle"`
Context *Context `json:"context"`
CallId CallId `json:"callId"`
}
type Node struct {
Element *Target // 任务
Next *Node // 下一个节点
}
type OrderList struct {
Header *Node
locker sync.Mutex
}
func NewOrderList() *OrderList {
return &OrderList{Header: new(Node)}
}
func (list *OrderList) Add(task *Target) {
var ptr = list.Header
for {
if ptr.Next == nil {
ptr.Next = &Node{
Element: task,
Next: nil,
}
return
} else {
if ptr.Next.Element.Circle > task.Circle {
tmp := ptr.Next
ptr.Next = &Node{
Element: task,
Next: nil,
}
ptr.Next.Next = tmp
return
} else {
ptr = ptr.Next
}
}
}
}
func (list *OrderList) Remove(task *Target) {
var ptr = list.Header
for {
if ptr.Next != nil {
if ptr.Next.Element.Id == task.Id {
list.locker.Lock()
ptr.Next = ptr.Next.Next
list.locker.Unlock()
return
} else {
ptr = ptr.Next
}
} else {
return
}
}
}
func (list *OrderList) Foreach(each func(task *Target)) {
var ptr = list.Header
for {
if ptr.Next != nil {
each(ptr.Next.Element)
ptr = ptr.Next
} else {
return
}
}
}
func (list *OrderList) Consumer(each func(task *Target) bool) {
var ptr = list.Header
var del = false
list.locker.Lock()
defer list.locker.Unlock()
for {
if ptr.Next != nil {
// ptr ptr.next ptr.next.next
del = each(ptr.Next.Element)
if del {
ptr.Next = ptr.Next.Next
} else {
ptr = ptr.Next
}
} else {
return
}
}
}