memcache

go.mod

@@ -0,0 +1,5 @@
+module github.com/rakadityas/cache-in-go
+
+go 1.14
+
+require github.com/coocood/freecache v1.1.1

go.sum

@@ -0,0 +1,8 @@
+github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
+github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
+github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
+github.com/coocood/freecache v1.1.1 h1:uukNF7QKCZEdZ9gAV7WQzvh0SbjwdMF6m3x3rxEkaPc=
+github.com/coocood/freecache v1.1.1/go.mod h1:OKrEjkGVoxZhyWAJoeFi5BMLUJm2Tit0kpGkIr7NGYY=
+github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72 h1:qLC7fQah7D6K1B0ujays3HV9gkFtllcxhzImRR7ArPQ=
+github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=

main.go

@@ -2,26 +2,88 @@ package main
 
 import (
 	"encoding/json"
+	"fmt"
 	"io/ioutil"
 	"log"
 	"net/http"
+
+	"github.com/coocood/freecache"
 )
 
+var cache *freecache.Cache
+
 func github(w http.ResponseWriter, r *http.Request) {
+
+	cacheVal, err := getCache([]byte("status"))
+	if err != nil {
+		json.NewEncoder(w).Encode(err)
+	}
+
+	if len(cacheVal) != 0 {
+		json.NewEncoder(w).Encode(string(cacheVal))
+		return
+	}
+
 	resp, err := http.Get("https://api.github.com/status")
 	if err != nil {
 		json.NewEncoder(w).Encode(err)
 	}
 	data, _ := ioutil.ReadAll(resp.Body)
 	resp.Body.Close()
+
+	err = saveCache([]byte("status"), data, 10)
+	if err != nil {
+		json.NewEncoder(w).Encode(err)
+		return
+	}
+
 	json.NewEncoder(w).Encode(string(data))
 }
 
+func initCache() {
+	cache = freecache.NewCache(10 * 1024 * 1024)
+}
+
+func saveCache(key []byte, value []byte, expireSeconds int) (err error) {
+	fmt.Println("[SAVE CACHE]")
+	return cache.Set(key, value, expireSeconds)
+}
+
+func getCache(key []byte) ([]byte, error) {
+	fmt.Println("[GET CACHE]")
+	return cache.Get(key)
+}
+
 func handleRequests() {
 	http.HandleFunc("/github", github)
 	log.Fatal(http.ListenAndServe(":10000", nil))
 }
 
 func main() {
+
+	initCache()
+
 	handleRequests()
 }
+
+/**
+	-. data apa yg dibalikin
+		curl --location --request GET 'localhost:10000/github'
+
+		pola data:
+		- response
+			- "{\"message\":\"GitHub lives! (2020-10-09 02:06:14 -0700) (1)\"}"
+
+		- berubah per 10 detik
+		- balikan satu response (general)
+
+	-. cache yang mana
+		- freecache
+
+	- keynya by apa
+		- public key
+
+	-. kenapa pilih cache itu
+		-
+
+**/