openbilibili/app/service/main/videoup/dao/archive/dao.cache.go

// Code generated by $GOPATH/src/go-common/app/tool/cache/gen. DO NOT EDIT.

/*
  Package archive is a generated cache proxy package.
  It is generated from:
  type _cache interface {
		// cache: -singleflight=true -nullcache=[]*archive.Staff{{ID:-1}} -check_null_code=len($)==1&&$[0].ID==-1
		StaffData(c context.Context, aid int64) ([]*archive.Staff, error)
	}
*/

package archive

import (
	"context"

	"go-common/app/service/main/videoup/model/archive"
	"go-common/library/net/metadata"
	"go-common/library/stat/prom"

	"golang.org/x/sync/singleflight"
)

var _ _cache
var cacheSingleFlights = [1]*singleflight.Group{{}}

// StaffData get data from cache if miss will call source method, then add to cache.
func (d *Dao) StaffData(c context.Context, id int64) (res []*archive.Staff, err error) {
	addCache := true
	res, err = d.CacheStaffData(c, id)
	if err != nil {
		addCache = false
		err = nil
	}
	defer func() {
		if len(res) == 1 && res[0].ID == -1 {
			res = nil
		}
	}()
	if len(res) != 0 {
		prom.CacheHit.Incr("StaffData")
		return
	}
	var rr interface{}
	sf := d.cacheSFStaffData(id)
	rr, err, _ = cacheSingleFlights[0].Do(sf, func() (r interface{}, e error) {
		prom.CacheMiss.Incr("StaffData")
		r, e = d.Staffs(c, id)
		return
	})
	res = rr.([]*archive.Staff)
	if err != nil {
		return
	}
	miss := res
	if len(miss) == 0 {
		miss = []*archive.Staff{{ID: -1}}
	}
	if !addCache {
		return
	}
	d.cache.Do(c, func(ctx context.Context) {
		d.AddCacheStaffData(metadata.WithContext(c), id, miss)
	})
	return
}