增加随时可取消的watch监控能力
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@ -38,3 +38,6 @@ const (
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// WatcherHandler 监听key变化的处理函数
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type WatcherHandler func(event *clientv3.Event)
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// CancelWatcherHandler 取消监听后的处理函数
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type CancelWatcherHandler func(key string, data interface{})
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@ -21,10 +21,48 @@ func WatchKey(ctx context.Context, watchKey string, callbackFunc WatcherHandler)
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// 变化之后,没有任何逻辑处理,视为不需要监听变化
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return
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}
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rch := Client.Watch(context.Background(), watchKey) // <-chan WatchResponse
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if nil == ctx {
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ctx = context.Background()
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}
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rch := Client.Watch(ctx, watchKey) // <-chan WatchResponse
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for watchResp := range rch {
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for _, ev := range watchResp.Events {
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callbackFunc(ev)
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}
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}
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}
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// WatchKeyWithCancel 可以随时取消的
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 3:16 下午 2021/11/23
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func WatchKeyWithCancel(ctx context.Context, watchKey string, callbackFunc WatcherHandler, cancelChan chan interface{}, cancelDealFunc CancelWatcherHandler) {
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if nil == callbackFunc {
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// 变化之后,没有任何逻辑处理,视为不需要监听变化
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return
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}
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if nil == ctx {
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ctx = context.Background()
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}
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rch := Client.Watch(context.Background(), watchKey) // <-chan WatchResponse
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hasFinish := false
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for {
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select {
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case cancelData := <-cancelChan:
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if nil != cancelDealFunc {
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cancelDealFunc(watchKey, cancelData)
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}
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hasFinish = true
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case watchResp := <-rch:
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for _, ev := range watchResp.Events {
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callbackFunc(ev)
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}
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}
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if hasFinish {
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break
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}
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}
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}
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