72 lines
1.5 KiB
Go
72 lines
1.5 KiB
Go
package dao
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import (
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"context"
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"encoding/json"
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"strconv"
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"go-common/app/interface/main/web-feed/model"
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"go-common/library/cache/memcache"
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"go-common/library/log"
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)
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const (
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_prefixFeed = "f_"
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)
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func feedKey(mid int64) string {
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return _prefixFeed + strconv.FormatInt(mid, 10)
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}
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// pingMc ping memcache
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func (d *Dao) pingMC(c context.Context) (err error) {
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conn := d.mc.Get(c)
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defer conn.Close()
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item := memcache.Item{Key: "ping", Value: []byte{1}, Expiration: 0}
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err = conn.Set(&item)
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return
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}
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// FeedCache gets feed cache
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func (d *Dao) FeedCache(c context.Context, mid int64) (feeds []*model.Feed, err error) {
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PromInfo("backup-cache")
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var (
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reply *memcache.Item
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conn = d.mc.Get(c)
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key = feedKey(mid)
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)
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defer conn.Close()
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if reply, err = conn.Get(key); err != nil {
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if err == memcache.ErrNotFound {
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err = nil
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} else {
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PromError("mc:获取feed缓存")
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log.Error("conn.Get(%s) error(%v)", key, err)
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}
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return
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}
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err = conn.Scan(reply, &feeds)
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return
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}
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// SetFeedCache sets feed cache
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func (d *Dao) SetFeedCache(c context.Context, mid int64, feeds []*model.Feed) (err error) {
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var (
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bs []byte
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key = feedKey(mid)
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conn = d.mc.Get(c)
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)
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defer conn.Close()
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if bs, err = json.Marshal(feeds); err != nil {
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PromError("mc:json feed缓存")
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log.Error("json.Marshal(%v) error(%v)", feeds, err)
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return
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}
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item := &memcache.Item{Key: key, Value: bs, Expiration: d.mcFeedExpire}
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if err = conn.Set(item); err != nil {
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PromError("mc:设置feed缓存")
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log.Error("conn.Set(%+v) error(%v)", item, err)
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}
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return
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}
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