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Fix caching.

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Introduce live mode.
This commit is contained in:
Ferdinand Mütsch 2019-05-19 20:34:26 +02:00
parent d5253ba46b
commit 1caf962917
1 changed files with 29 additions and 6 deletions
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35
routes/summary.go
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@ -1,7 +1,10 @@
package routes
import (
"crypto/md5"
"fmt"
"net/http"
"strconv"
"time"
"github.com/n1try/wakapi/models"
@ -16,7 +19,7 @@ const (
IntervalLastYear string = "year"
)
var summaryCache map[time.Time]*models.Summary
var summaryCache map[string]*models.Summary
type SummaryHandler struct {
SummarySrvc *services.SummaryService
@ -51,22 +54,42 @@ func (h *SummaryHandler) Get(w http.ResponseWriter, r *http.Request) {
}
}
if _, ok := summaryCache[from]; !ok {
live := params.Get("live") != "" && params.Get("live") != "false"
to := utils.StartOfDay()
if live {
to = time.Now()
}
var summary *models.Summary
cacheKey := getHash([]time.Time{from, to})
if _, ok := summaryCache[cacheKey]; !ok {
// Cache Miss
summary, err := h.SummarySrvc.GetSummary(from, utils.StartOfDay(), user) // 'to' is always constant
fmt.Println("Cache miss")
summary, err = h.SummarySrvc.GetSummary(from, to, user) // 'to' is always constant
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
return
}
summaryCache[from] = summary
if !live {
summaryCache[cacheKey] = summary
}
} else {
summary, _ = summaryCache[cacheKey]
}
summary, _ := summaryCache[from]
utils.RespondJSON(w, http.StatusOK, summary)
}
func tryInitCache() {
if summaryCache == nil {
summaryCache = make(map[time.Time]*models.Summary)
summaryCache = make(map[string]*models.Summary)
}
}
func getHash(times []time.Time) string {
digest := md5.New()
for _, t := range times {
digest.Write([]byte(strconv.Itoa(int(t.Unix()))))
}
return string(digest.Sum(nil))
}