Update go-chi/cache to utilize Ping() (#19719)

* update gitea.com/go-chi/cache -> v0.2.0

* ajust to new interface

* refactor

go.mod

@@ -6,7 +6,7 @@ require (
 	code.gitea.io/gitea-vet v0.2.2-0.20220122151748-48ebc902541b
 	code.gitea.io/sdk/gitea v0.15.1
 	gitea.com/go-chi/binding v0.0.0-20220309004920-114340dabecb
-	gitea.com/go-chi/cache v0.0.0-20211201020628-dcb774c4ffea
+	gitea.com/go-chi/cache v0.2.0
 	gitea.com/go-chi/captcha v0.0.0-20211013065431-70641c1a35d5
 	gitea.com/go-chi/session v0.0.0-20211218221615-e3605d8b28b8
 	gitea.com/lunny/levelqueue v0.4.1

go.sum

@@ -72,8 +72,8 @@ dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7
 gitea.com/go-chi/binding v0.0.0-20220309004920-114340dabecb h1:Yy0Bxzc8R2wxiwXoG/rECGplJUSpXqCsog9PuJFgiHs=
 gitea.com/go-chi/binding v0.0.0-20220309004920-114340dabecb/go.mod h1:77TZu701zMXWJFvB8gvTbQ92zQ3DQq/H7l5wAEjQRKc=
 gitea.com/go-chi/cache v0.0.0-20210110083709-82c4c9ce2d5e/go.mod h1:k2V/gPDEtXGjjMGuBJiapffAXTv76H4snSmlJRLUhH0=
-gitea.com/go-chi/cache v0.0.0-20211201020628-dcb774c4ffea h1:Fq/f4hjigb5v5WpA5TfBCZOSavpHPBiB4Wkj/WsITYM=
+gitea.com/go-chi/cache v0.2.0 h1:E0npuTfDW6CT1yD8NMDVc1SK6IeRjfmRL2zlEsCEd7w=
-gitea.com/go-chi/cache v0.0.0-20211201020628-dcb774c4ffea/go.mod h1:k2V/gPDEtXGjjMGuBJiapffAXTv76H4snSmlJRLUhH0=
+gitea.com/go-chi/cache v0.2.0/go.mod h1:iQlVK2aKTZ/rE9UcHyz9pQWGvdP9i1eI2spOpzgCrtE=
 gitea.com/go-chi/captcha v0.0.0-20211013065431-70641c1a35d5 h1:J/1i8u40TbcLP/w2w2KCkgW2PelIqYkD5UOwu8IOvVU=
 gitea.com/go-chi/captcha v0.0.0-20211013065431-70641c1a35d5/go.mod h1:hQ9SYHKdOX968wJglb/NMQ+UqpOKwW4L+EYdvkWjHSo=
 gitea.com/go-chi/session v0.0.0-20211218221615-e3605d8b28b8 h1:tJQRXgZigkLeeW9LPlps9G9aMoE6LAmqigLA+wxmd1Q=

modules/cache/cache.go

@@ -5,11 +5,9 @@
 package cache
 
 import (
-	"errors"
 	"fmt"
 	"strconv"
 
-	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
 
 	mc "gitea.com/go-chi/cache"
@@ -35,7 +33,7 @@ func NewContext() error {
 		if conn, err = newCache(setting.CacheService.Cache); err != nil {
 			return err
 		}
-		if err = Ping(); err != nil {
+		if err = conn.Ping(); err != nil {
 			return err
 		}
 	}
@@ -43,29 +41,6 @@ func NewContext() error {
 	return err
 }
 
-// Ping checks if the cache service works or not, it not, it returns an error
-func Ping() error {
-	if conn == nil {
-		return errors.New("cache not available")
-	}
-	var err error
-	const testKey = "__gitea_cache_test"
-	const testVal = "test-value"
-	if err = conn.Put(testKey, testVal, 10); err != nil {
-		return err
-	}
-	val := conn.Get(testKey)
-	if valStr, ok := val.(string); !ok || valStr != testVal {
-		// If the cache is full, the Get may not read the expected value stored by Put.
-		// Since we have checked that Put can success, so we just show a warning here, do not return an error to panic.
-		log.Warn("cache (adapter:%s, config:%s) doesn't seem to work correctly, set test value '%v' but get '%v'",
-			setting.CacheService.Cache.Adapter, setting.CacheService.Cache.Conn,
-			testVal, val,
-		)
-	}
-	return nil
-}
-
 // GetCache returns the currently configured cache
 func GetCache() mc.Cache {
 	return conn

modules/cache/cache_redis.go

@@ -153,6 +153,11 @@ func (c *RedisCacher) StartAndGC(opts cache.Options) error {
 	return c.c.Ping(graceful.GetManager().HammerContext()).Err()
 }
 
+// Ping tests if the cache is alive.
+func (c *RedisCacher) Ping() error {
+	return c.c.Ping(graceful.GetManager().HammerContext()).Err()
+}
+
 func init() {
 	cache.Register("redis", &RedisCacher{})
 }

modules/cache/cache_twoqueue.go

@@ -199,6 +199,11 @@ func (c *TwoQueueCache) StartAndGC(opts mc.Options) error {
 	return err
 }
 
+// Ping tests if the cache is alive.
+func (c *TwoQueueCache) Ping() error {
+	return mc.GenericPing(c)
+}
+
 func init() {
 	mc.Register("twoqueue", &TwoQueueCache{})
 }

routers/web/healthcheck/check.go

@@ -126,7 +126,7 @@ func checkCache(checks checks) status {
 	}
 
 	st := componentStatus{}
-	if err := cache.Ping(); err != nil {
+	if err := cache.GetCache().Ping(); err != nil {
 		st.Status = fail
 		st.Time = getCheckTime()
 		log.Error("cache ping failed with error: %v", err)