mirror of https://github.com/tidwall/tile38.git
94 lines
2.1 KiB
Go
94 lines
2.1 KiB
Go
package controller
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import (
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"time"
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"github.com/tidwall/resp"
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"github.com/tidwall/tile38/controller/log"
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"github.com/tidwall/tile38/controller/server"
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)
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// clearAllExpires removes all items that are marked at expires.
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func (c *Controller) clearAllExpires() {
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c.expires = make(map[string]map[string]time.Time)
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}
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// clearIDExpires will clear a single item from the expires list.
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func (c *Controller) clearIDExpires(key, id string) {
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m := c.expires[key]
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if m == nil {
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return
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}
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delete(m, id)
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if len(m) == 0 {
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delete(c.expires, key)
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}
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}
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// clearKeyExpires will clear all items that are marked as expires from a single key.
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func (c *Controller) clearKeyExpires(key string) {
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delete(c.expires, key)
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}
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// expireAt will mark an item as expires at a specific time.
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func (c *Controller) expireAt(key, id string, at time.Time) {
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m := c.expires[key]
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if m == nil {
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m = make(map[string]time.Time)
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c.expires[key] = m
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}
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m[id] = at
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}
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// getExpires will return the when the item expires.
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func (c *Controller) getExpires(key, id string) (at time.Time, ok bool) {
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m := c.expires[key]
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if m == nil {
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ok = false
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return
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}
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at, ok = m[id]
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return
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}
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// backgroundExpiring watches for when items must expire from the database.
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// It's runs through every item that has been marked as expires five times
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// per second.
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func (c *Controller) backgroundExpiring() {
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for {
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c.mu.Lock()
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if c.stopBackgroundExpiring {
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c.mu.Unlock()
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return
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}
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// Only excute for leaders. Followers should ignore.
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if c.config.FollowHost == "" {
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now := time.Now()
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for key, m := range c.expires {
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for id, at := range m {
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if now.After(at) {
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// issue a DEL command
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c.mu.Lock()
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c.statsExpired++
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c.mu.Unlock()
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msg := &server.Message{}
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msg.Values = resp.MultiBulkValue("del", key, id).Array()
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msg.Command = "del"
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_, d, err := c.cmdDel(msg)
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if err != nil {
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log.Fatal(err)
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continue
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}
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if err := c.writeAOF(resp.ArrayValue(msg.Values), &d); err != nil {
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log.Fatal(err)
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continue
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}
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}
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}
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}
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}
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c.mu.Unlock()
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time.Sleep(time.Second / 5)
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}
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}
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