teach/atsebay.t
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Introduce survey and question cache

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This commit is contained in:
nemunaire 2022-09-02 14:08:03 +02:00
commit ab88195607
4 changed files with 93 additions and 2 deletions
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40
surveys.go
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@ -6,13 +6,17 @@ import (
"net/http"
"strconv"
"strings"
"sync"
"time"
"github.com/gin-gonic/gin"
)
var (
_score_cache = map[int64]map[int64]*float64{}
_score_cache = map[int64]map[int64]*float64{}
_score_cache_mutex = sync.RWMutex{}
_surveys_cache = map[int64]*Survey{}
_surveys_cache_mutex = sync.RWMutex{}
)
func declareAPISurveysRoutes(router *gin.RouterGroup) {
@ -228,8 +232,19 @@ func getSurveys(cnd string, param ...interface{}) (surveys []*Survey, err error)
}
func getSurvey(id int) (s *Survey, err error) {
_surveys_cache_mutex.RLock()
survey, ok := _surveys_cache[int64(id)]
_surveys_cache_mutex.RUnlock()
if ok {
return survey, nil
}
s = new(Survey)
err = DBQueryRow("SELECT id_survey, title, promo, grp, shown, direct, corrected, start_availability, end_availability FROM surveys WHERE id_survey=?", id).Scan(&s.Id, &s.Title, &s.Promo, &s.Group, &s.Shown, &s.Direct, &s.Corrected, &s.StartAvailability, &s.EndAvailability)
_surveys_cache_mutex.Lock()
_surveys_cache[int64(id)] = s
_surveys_cache_mutex.Unlock()
return
}
@ -244,17 +259,29 @@ func NewSurvey(title string, promo uint, group string, shown bool, direct *int64
}
func (s Survey) GetScore(u *User) (score *float64, err error) {
_score_cache_mutex.RLock()
if _, ok := _score_cache[u.Id]; !ok {
_score_cache_mutex.RUnlock()
_score_cache_mutex.Lock()
_score_cache[u.Id] = map[int64]*float64{}
_score_cache_mutex.Unlock()
_score_cache_mutex.RLock()
}
if v, ok := _score_cache[u.Id][s.Id]; ok {
v, ok := _score_cache[u.Id][s.Id]
_score_cache_mutex.RUnlock()
if ok {
score = v
} else {
err = DBQueryRow("SELECT SUM(score)/COUNT(*) FROM student_scores WHERE id_survey=? AND id_user=?", s.Id, u.Id).Scan(&score)
if score != nil {
*score = *score / 5.0
}
_score_cache_mutex.Lock()
_score_cache[u.Id][s.Id] = score
_score_cache_mutex.Unlock()
}
return
}
@ -288,6 +315,9 @@ func (s *Survey) Update() (*Survey, error) {
if _, err := DBExec("UPDATE surveys SET title = ?, promo = ?, grp = ?, shown = ?, direct = ?, corrected = ?, start_availability = ?, end_availability = ? WHERE id_survey = ?", s.Title, s.Promo, s.Group, s.Shown, s.Direct, s.Corrected, s.StartAvailability, s.EndAvailability, s.Id); err != nil {
return nil, err
} else {
_surveys_cache_mutex.Lock()
_surveys_cache[s.Id] = s
_surveys_cache_mutex.Unlock()
return s, err
}
}
@ -298,6 +328,9 @@ func (s Survey) Delete() (int64, error) {
} else if nb, err := res.RowsAffected(); err != nil {
return 0, err
} else {
_surveys_cache_mutex.Lock()
delete(_surveys_cache, s.Id)
_surveys_cache_mutex.Unlock()
return nb, err
}
}
@ -308,6 +341,9 @@ func ClearSurveys() (int64, error) {
} else if nb, err := res.RowsAffected(); err != nil {
return 0, err
} else {
_surveys_cache_mutex.Lock()
_surveys_cache = map[int64]*Survey{}
_surveys_cache_mutex.Unlock()
return nb, err
}
}