优化部分逻辑
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+22
-43
@@ -14,13 +14,19 @@ import (
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"github.com/go-redis/redis/v8"
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)
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// 功能描述
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// 这是基于Redis的定时任务调度器,能够有效的在服务集群里面调度任务,避免了单点压力过高或单点故障问题
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// 由于所有的服务代码是一致的,也就是一个定时任务将在所有的服务都有注册,具体调度到哪个服务运行看调度结果
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// 暂不支持删除定时器,因为这个定时器的设计是基于全局的,如果删除了,那么其他服务就不知道了
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// 单例模式
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var clusterOnceLimit sync.Once
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// 已注册的任务列表
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var clusterWorkerList sync.Map
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type cluster struct {
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type Cluster struct {
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ctx context.Context
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redis *redis.Client
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lockKey string // 全局计算的key
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@@ -29,14 +35,14 @@ type cluster struct {
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listKey string // 可执行的任务列表的key
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}
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var clu *cluster = nil
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var clu *Cluster = nil
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func InitCluster(ctx context.Context, red *redis.Client) *cluster {
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func InitCluster(ctx context.Context, red *redis.Client) *Cluster {
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clusterOnceLimit.Do(func() {
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clu = &cluster{
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clu = &Cluster{
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ctx: ctx,
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redis: red,
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lockKey: "timer:cluster_globalLockKey",
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lockKey: "timer:cluster_globalLockKey", // 定时器的全局锁
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nextKey: "timer:cluster_nextKey",
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zsetKey: "timer:cluster_zsetKey",
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listKey: "timer:cluster_listKey",
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@@ -63,7 +69,7 @@ func InitCluster(ctx context.Context, red *redis.Client) *cluster {
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return clu
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}
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func (c *cluster) AddTimer(ctx context.Context, uniqueKey string, spaceTime time.Duration, callback callback, extend ExtendParams) error {
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func (c *Cluster) Add(ctx context.Context, uniqueKey string, spaceTime time.Duration, callback callback, extendData interface{}) error {
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_, ok := clusterWorkerList.Load(uniqueKey)
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if ok {
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return errors.New("key已存在")
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@@ -86,12 +92,12 @@ func (c *cluster) AddTimer(ctx context.Context, uniqueKey string, spaceTime time
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nowTime := time.Now()
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t := timerStr{
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BeginTime: nowTime,
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NextTime: nowTime,
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SpaceTime: spaceTime,
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Callback: callback,
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Extend: extend,
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UniqueKey: uniqueKey,
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BeginTime: nowTime,
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NextTime: nowTime,
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SpaceTime: spaceTime,
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Callback: callback,
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ExtendData: extendData,
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UniqueKey: uniqueKey,
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}
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clusterWorkerList.Store(uniqueKey, t)
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@@ -119,7 +125,7 @@ func (c *cluster) AddTimer(ctx context.Context, uniqueKey string, spaceTime time
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}
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// 计算下一次执行的时间
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func (c *cluster) getNextTime() {
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func (c *Cluster) getNextTime() {
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// log.Println("begin computer")
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ctx, cancel := context.WithCancel(c.ctx)
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@@ -184,31 +190,8 @@ func getNextExecTime(beforeTime time.Time, spaceTime time.Duration) time.Time {
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}
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// 获取任务
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func (c *cluster) getTask() {
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func (c *Cluster) getTask() {
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// 定时去Redis获取任务
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// zb := redis.ZRangeBy{
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// Min: "0",
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// Max: fmt.Sprintf("%+v", time.Now().UnixMilli()),
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// }
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// taskList, _ := c.redis.ZRangeByScore(c.ctx, c.zsetKey, &zb).Result()
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// if len(taskList) == 0 {
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// return
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// }
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// p := c.redis.Pipeline()
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// for _, val := range taskList {
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// // 添加到可执行队列
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// p.LPush(c.ctx, c.listKey, val)
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// // 删除有序集合
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// p.ZRem(c.ctx, c.zsetKey, val)
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// }
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// _, err := p.Exec(c.ctx)
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// // fmt.Println(err)
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// _ = err
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script := `
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local token = redis.call('zrangebyscore',KEYS[1],ARGV[1],ARGV[2])
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for i,v in ipairs(token) do
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@@ -222,7 +205,7 @@ func (c *cluster) getTask() {
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}
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// 监听任务
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func (c *cluster) watch() {
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func (c *Cluster) watch() {
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// 执行任务
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for {
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keys, err := c.redis.BLPop(c.ctx, time.Second*10, c.listKey).Result()
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@@ -236,8 +219,6 @@ func (c *cluster) watch() {
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// 执行任务
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func doTask(ctx context.Context, red *redis.Client, taskId string) {
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ctx, cancel := context.WithCancel(ctx)
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defer cancel()
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defer func() {
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if err := recover(); err != nil {
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@@ -262,8 +243,6 @@ func doTask(ctx context.Context, red *redis.Client, taskId string) {
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}
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defer lock.Unlock()
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ctx = context.WithValue(ctx, extendParamKey, t.Extend)
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// 执行任务
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t.Callback(ctx)
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t.Callback(ctx,t.ExtendData)
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}
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