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87 lines
2.6 KiB
87 lines
2.6 KiB
package dao
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import (
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"time"
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"github.com/rocboss/paopao-ce/internal/conf"
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"github.com/rocboss/paopao-ce/internal/core"
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"github.com/rocboss/paopao-ce/internal/model"
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"github.com/sirupsen/logrus"
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)
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func newSimpleCacheIndexServant(getIndexPosts func(offset, limit int) ([]*model.PostFormated, error)) *simpleCacheIndexServant {
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s := conf.CacheIndexSetting
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cacheIndex := &simpleCacheIndexServant{
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getIndexPosts: getIndexPosts,
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maxIndexSize: s.MaxIndexSize,
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indexPosts: make([]*model.PostFormated, 0),
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indexActionCh: make(chan core.IndexActionT, 100), // optimize: size need configure by custom
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checkTick: time.NewTicker(time.Duration(s.CheckTickDuration) * time.Second), // check whether need update index every 1 minute
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expireIndexTick: time.NewTicker(time.Duration(s.ExpireTickDuration) * time.Second), // force expire index every 5 minute
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}
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// start index posts
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cacheIndex.atomicIndex.Store(cacheIndex.indexPosts)
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go cacheIndex.startIndexPosts()
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return cacheIndex
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}
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func (s *simpleCacheIndexServant) IndexPosts(offset int, limit int) ([]*model.PostFormated, bool) {
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posts := s.atomicIndex.Load().([]*model.PostFormated)
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start := offset * limit
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end := start + limit
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if len(posts) >= end {
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logrus.Debugln("get index posts from cached")
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return posts[start:end], true
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}
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return nil, false
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}
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func (s *simpleCacheIndexServant) SendAction(act core.IndexActionT) {
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select {
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case s.indexActionCh <- act:
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logrus.Debugf("send indexAction by chan: %s", act)
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default:
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go func(ch chan<- core.IndexActionT, act core.IndexActionT) {
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logrus.Debugf("send indexAction by goroutine: %s", act)
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ch <- act
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}(s.indexActionCh, act)
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}
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}
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func (s *simpleCacheIndexServant) startIndexPosts() {
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var err error
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for {
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select {
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case <-s.checkTick.C:
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if len(s.indexPosts) == 0 {
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logrus.Debugf("index posts by checkTick")
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if s.indexPosts, err = s.getIndexPosts(0, s.maxIndexSize); err == nil {
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s.atomicIndex.Store(s.indexPosts)
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} else {
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logrus.Errorf("get index posts err: %v", err)
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}
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}
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case <-s.expireIndexTick.C:
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logrus.Debugf("expire index posts by expireIndexTick")
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if len(s.indexPosts) != 0 {
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s.indexPosts = nil
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s.atomicIndex.Store(s.indexPosts)
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}
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case action := <-s.indexActionCh:
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switch action {
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case core.IdxActCreatePost, core.IdxActUpdatePost, core.IdxActDeletePost, core.IdxActStickPost:
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// prevent many update post in least time
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if len(s.indexPosts) != 0 {
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logrus.Debugf("remove index posts by action %s", action)
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s.indexPosts = nil
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s.atomicIndex.Store(s.indexPosts)
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}
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default:
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// nop
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}
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}
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}
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}
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