feat(lyra)!: 接入 Redis 并添加缓存连通性实验

- 封装缓存读写、JSON 编解码、过期时间与操作超时
- 集中组装 Redis 依赖，在测试接口验证分类缓存读写
- 更新依赖并移除原 handler 测试

BREAKING CHANGE: 配置节由 redis 改为 cache，新增 db 和 timeout 配置项

go/projects/lyra/cmd/lyra/dependency.go

@@ -1,29 +1,34 @@
 package main
 
 import (
+	"lyra/internal/cache"
 	"lyra/internal/config"
 	"lyra/internal/handler"
 	"lyra/internal/model"
 	"lyra/internal/router"
+	"time"
 
 	"github.com/jmoiron/sqlx"
+	"github.com/redis/go-redis/v9"
 )
 
 type Dependencies struct {
 	Config        *config.Config
+	Cache         *cache.Cache
 	CategoryModel model.CategoryModel
 }
 
 // buildHandlers 集中组装各路由的处理器，入口启动时调用一次。
 func buildHandlers(dpd *Dependencies) router.Handlers {
 	return router.Handlers{
-		TestHandler: handler.NewTestHandler(dpd.CategoryModel).Hello(),
+		TestHandler: handler.NewTestHandler(dpd.CategoryModel, dpd.Cache).Hello(),
 	}
 }
 
-func buildDependencies(cfg *config.Config, db *sqlx.DB) *Dependencies {
+func buildDependencies(cfg *config.Config, db *sqlx.DB, cacheClient *redis.Client) *Dependencies {
 	return &Dependencies{
 		Config:        cfg,
+		Cache:         cache.NewCache(cacheClient, time.Duration(cfg.Cache.Timeout)*time.Millisecond),
 		CategoryModel: model.NewCategoryModel(db),
 	}
 }

go/projects/lyra/cmd/lyra/main.go

@@ -7,10 +7,13 @@ import (
 	"log"
 	"lyra/internal/config"
 	"lyra/internal/router"
+	"net"
+	"strconv"
 
 	"github.com/gin-gonic/gin"
 	"github.com/jmoiron/sqlx"
 	"github.com/joho/godotenv"
+	"github.com/redis/go-redis/v9"
 
 	// 注册 pgx 驱动，供 sqlx 以 "pgx" 驱动名使用。
 	_ "github.com/jackc/pgx/v5/stdlib"
@@ -41,7 +44,12 @@ func main() {
 	}
 	defer db.Close()
 
-	deps := buildDependencies(cfg, db)
+	cache := redis.NewClient(&redis.Options{
+		Addr: net.JoinHostPort(cfg.Cache.Host, strconv.Itoa(cfg.Cache.Port)),
+		DB:   cfg.Cache.DB,
+	})
+	defer cache.Close()
+	deps := buildDependencies(cfg, db, cache)
 	handlers := buildHandlers(deps)
 	router.RegisterRoutes(ginEngine, handlers)
 	addr := fmt.Sprintf("%s:%d", cfg.HTTP.Host, cfg.HTTP.Port)

go/projects/lyra/etc/lyra.toml

@@ -13,6 +13,8 @@ port = 5432
 user = "admin"
 name = "lab"
 
-[redis]
+[cache]
 host = "localhost"
 port = 6379
+db = 0
+timeout = 200

go/projects/lyra/go.mod

@@ -3,17 +3,20 @@ module lyra
 go 1.27.1
 
 require (
+	github.com/Masterminds/squirrel v1.5.4
 	github.com/gin-gonic/gin v1.12.0
 	github.com/jackc/pgx/v5 v5.11.0
 	github.com/jmoiron/sqlx v1.4.0
+	github.com/joho/godotenv v1.5.1
+	github.com/redis/go-redis/v9 v9.23.0
 	github.com/spf13/viper v1.21.0
 )
 
 require (
-	github.com/Masterminds/squirrel v1.5.4 // indirect
 	github.com/bytedance/gopkg v0.1.3 // indirect
 	github.com/bytedance/sonic v1.15.0 // indirect
 	github.com/bytedance/sonic/loader v0.5.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cloudwego/base64x v0.1.6 // indirect
 	github.com/fsnotify/fsnotify v1.9.0 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.12 // indirect
@@ -27,9 +30,8 @@ require (
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
-	github.com/joho/godotenv v1.5.1 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/klauspost/cpuid/v2 v2.4.0 // indirect
 	github.com/lann/builder v0.0.0-20180802200727-47ae307949d0 // indirect
 	github.com/lann/ps v0.0.0-20150810152359-62de8c46ede0 // indirect
 	github.com/leodido/go-urn v1.4.0 // indirect
@@ -48,12 +50,13 @@ require (
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.3.1 // indirect
 	go.mongodb.org/mongo-driver/v2 v2.5.0 // indirect
-	go.yaml.in/yaml/v3 v3.0.4 // indirect
+	go.uber.org/atomic v1.12.0 // indirect
+	go.yaml.in/yaml/v3 v3.0.5 // indirect
 	golang.org/x/arch v0.22.0 // indirect
 	golang.org/x/crypto v0.48.0 // indirect
 	golang.org/x/net v0.51.0 // indirect
 	golang.org/x/sync v0.19.0 // indirect
-	golang.org/x/sys v0.41.0 // indirect
+	golang.org/x/sys v0.48.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
 	google.golang.org/protobuf v1.36.10 // indirect
 )

go/projects/lyra/go.sum

@@ -2,12 +2,18 @@ filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
 github.com/Masterminds/squirrel v1.5.4 h1:uUcX/aBc8O7Fg9kaISIUsHXdKuqehiXAMQTYX8afzqM=
 github.com/Masterminds/squirrel v1.5.4/go.mod h1:NNaOrjSoIDfDA40n7sr2tPNZRfjzjA400rg+riTZj10=
+github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
+github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
+github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
+github.com/bsm/gomega v1.27.10/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
 github.com/bytedance/gopkg v0.1.3 h1:TPBSwH8RsouGCBcMBktLt1AymVo2TVsBVCY4b6TnZ/M=
 github.com/bytedance/gopkg v0.1.3/go.mod h1:576VvJ+eJgyCzdjS+c4+77QF3p7ubbtiKARP3TxducM=
 github.com/bytedance/sonic v1.15.0 h1:/PXeWFaR5ElNcVE84U0dOHjiMHQOwNIx3K4ymzh/uSE=
 github.com/bytedance/sonic v1.15.0/go.mod h1:tFkWrPz0/CUCLEF4ri4UkHekCIcdnkqXw9VduqpJh0k=
 github.com/bytedance/sonic/loader v0.5.0 h1:gXH3KVnatgY7loH5/TkeVyXPfESoqSBSBEiDd5VjlgE=
 github.com/bytedance/sonic/loader v0.5.0/go.mod h1:AR4NYCk5DdzZizZ5djGqQ92eEhCCcdf5x77udYiSJRo=
+github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cloudwego/base64x v0.1.6 h1:t11wG9AECkCDk5fMSoxmufanudBtJ+/HemLstXDLI2M=
 github.com/cloudwego/base64x v0.1.6/go.mod h1:OFcloc187FXDaYHvrNIjxSe8ncn0OOM8gEHfghB2IPU=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -56,8 +62,8 @@ github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
 github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
-github.com/klauspost/cpuid/v2 v2.3.0 h1:S4CRMLnYUhGeDFDqkGriYKdfoFlDnMtqTiI/sFzhA9Y=
-github.com/klauspost/cpuid/v2 v2.3.0/go.mod h1:hqwkgyIinND0mEev00jJYCxPNVRVXFQeu1XKlok6oO0=
+github.com/klauspost/cpuid/v2 v2.4.0 h1:S6Hrbc7+ywsr0r+RLapfGBHfyefhCTwEh3A0tV913Dw=
+github.com/klauspost/cpuid/v2 v2.4.0/go.mod h1:19jmZ9mjzoF//ddRSUsv0zfBTJWh3QJh9FNxZTMrGxU=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
@@ -81,12 +87,13 @@ github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9G
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/pelletier/go-toml/v2 v2.2.4 h1:mye9XuhQ6gvn5h28+VilKrrPoQVanw5PMw/TB0t5Ec4=
 github.com/pelletier/go-toml/v2 v2.2.4/go.mod h1:2gIqNv+qfxSVS7cM2xJQKtLSTLUE9V8t9Stt+h56mCY=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/quic-go/qpack v0.6.0 h1:g7W+BMYynC1LbYLSqRt8PBg5Tgwxn214ZZR34VIOjz8=
 github.com/quic-go/qpack v0.6.0/go.mod h1:lUpLKChi8njB4ty2bFLX2x4gzDqXwUpaO1DP9qMDZII=
 github.com/quic-go/quic-go v0.59.0 h1:OLJkp1Mlm/aS7dpKgTc6cnpynnD2Xg7C1pwL6vy/SAw=
 github.com/quic-go/quic-go v0.59.0/go.mod h1:upnsH4Ju1YkqpLXC305eW3yDZ4NfnNbmQRCMWS58IKU=
+github.com/redis/go-redis/v9 v9.23.0 h1:/TTVdJa8BRNsybwwGGnmiYktHNlUXtbOQxlWpHBPL3s=
+github.com/redis/go-redis/v9 v9.23.0/go.mod h1:EWP2UUk+XDaI1s5nQB5mablZN6vccXlmBQTyfnF87D0=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
 github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
 github.com/sagikazarmark/locafero v0.11.0 h1:1iurJgmM9G3PA/I+wWYIOw/5SyBtxapeHDcg+AAIFXc=
@@ -112,20 +119,24 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
-github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
-github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+github.com/stretchr/testify v1.12.1 h1:EuwCh5fleGS7H32xRwO3wRGT7DxrDhLAT6FF8MpWDWE=
+github.com/stretchr/testify v1.12.1/go.mod h1:MDEgiDPPsNp5cuIrHPPCyornHKgEVbtFUmoNlxoYthg=
 github.com/subosito/gotenv v1.6.0 h1:9NlTDc1FTs4qu0DDq7AEtTPNw6SVm7uBMsUCUjABIf8=
 github.com/subosito/gotenv v1.6.0/go.mod h1:Dk4QP5c2W3ibzajGcXpNraDfq2IrhjMIvMSWPKKo0FU=
 github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS4MhqMhdFk5YI=
 github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
 github.com/ugorji/go/codec v1.3.1 h1:waO7eEiFDwidsBN6agj1vJQ4AG7lh2yqXyOXqhgQuyY=
 github.com/ugorji/go/codec v1.3.1/go.mod h1:pRBVtBSKl77K30Bv8R2P+cLSGaTtex6fsA2Wjqmfxj4=
+github.com/zeebo/xxh3 v1.1.0 h1:s7DLGDK45Dyfg7++yxI0khrfwq9661w9EN78eP/UZVs=
+github.com/zeebo/xxh3 v1.1.0/go.mod h1:IisAie1LELR4xhVinxWS5+zf1lA4p0MW4T+w+W07F5s=
 go.mongodb.org/mongo-driver/v2 v2.5.0 h1:yXUhImUjjAInNcpTcAlPHiT7bIXhshCTL3jVBkF3xaE=
 go.mongodb.org/mongo-driver/v2 v2.5.0/go.mod h1:yOI9kBsufol30iFsl1slpdq1I0eHPzybRWdyYUs8K/0=
+go.uber.org/atomic v1.12.0 h1:BvcXdFKuviU4fTL/f+SxdQ5qJX/Jix8pAkgdUcb3XOE=
+go.uber.org/atomic v1.12.0/go.mod h1:I6c4cg+6HCxRjfjSsYtApoFILnpc0CGUdGkXVqbYVNk=
 go.uber.org/mock v0.6.0 h1:hyF9dfmbgIX5EfOdasqLsWD6xqpNZlXblLB/Dbnwv3Y=
 go.uber.org/mock v0.6.0/go.mod h1:KiVJ4BqZJaMj4svdfmHM0AUx4NJYO8ZNpPnZn1Z+BBU=
-go.yaml.in/yaml/v3 v3.0.4 h1:tfq32ie2Jv2UxXFdLJdh3jXuOzWiL1fo0bu/FbuKpbc=
-go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
+go.yaml.in/yaml/v3 v3.0.5 h1:N6y/pJk8buWs9NY5ERU2HSMfm+IuD/OtfdAnq6kESPw=
+go.yaml.in/yaml/v3 v3.0.5/go.mod h1:HVTZu1O7/Vkt2N+BFy8Zza+lnLsABggaTM2ZpNIGuKg=
 golang.org/x/arch v0.22.0 h1:c/Zle32i5ttqRXjdLyyHZESLD/bB90DCU1g9l/0YBDI=
 golang.org/x/arch v0.22.0/go.mod h1:dNHoOeKiyja7GTvF9NJS1l3Z2yntpQNzgrjh1cU103A=
 golang.org/x/crypto v0.48.0 h1:/VRzVqiRSggnhY7gNRxPauEQ5Drw9haKdM0jqfcCFts=
@@ -135,15 +146,12 @@ golang.org/x/net v0.51.0/go.mod h1:aamm+2QF5ogm02fjy5Bb7CQ0WMt1/WVM7FtyaTLlA9Y=
 golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
 golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.41.0 h1:Ivj+2Cp/ylzLiEU89QhWblYnOE9zerudt9Ftecq2C6k=
-golang.org/x/sys v0.41.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/sys v0.48.0 h1:bbX/i/6MgT9BVLM9RT1thmxL04yeTAhbEz4SyadbXoo=
+golang.org/x/sys v0.48.0/go.mod h1:hNLxWAXmnKAxqDtdwIYC4bM9oQPEecfsnNMuSxOs3og=
 golang.org/x/text v0.34.0 h1:oL/Qq0Kdaqxa1KbNeMKwQq0reLCCaFtqu2eNuSeNHbk=
 golang.org/x/text v0.34.0/go.mod h1:homfLqTYRFyVYemLBFl5GgL/DWEiH5wcsQ5gSh1yziA=
 google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
 google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

go/projects/lyra/internal/cache/cache.go

@@ -0,0 +1,68 @@
+package cache
+
+import (
+	"context"
+	"encoding/json/v2"
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/redis/go-redis/v9"
+)
+
+type Entry[T any] struct {
+	Key   string
+	Value T
+	TTL   time.Duration
+}
+
+type Cache struct {
+	client           *redis.Client
+	operationTimeout time.Duration
+}
+
+func NewCache(client *redis.Client, timeout time.Duration) *Cache {
+	return &Cache{
+		client:           client,
+		operationTimeout: timeout,
+	}
+}
+
+func (c *Cache) Get[T any](ctx context.Context, key string) (T, bool, error) {
+	var zero T
+	operationCtx, cancel := context.WithTimeout(ctx, c.operationTimeout)
+	defer cancel()
+
+	payload, err := c.client.Get(operationCtx, key).Result()
+	cancel()
+	if errors.Is(err, redis.Nil) {
+		return zero, false, nil
+	}
+	if err != nil {
+		return zero, false, fmt.Errorf("读取缓存失败：%w", err)
+	}
+	var value T
+	if err := json.Unmarshal([]byte(payload), &value); err != nil {
+		return zero, false, fmt.Errorf("缓存解码失败：%w", err)
+	}
+	return value, true, nil
+}
+
+func (c *Cache) Set[T any](ctx context.Context, entry Entry[T]) error {
+	if entry.TTL < 0 {
+		return fmt.Errorf("缓存过期时间必须大于等于零: %v", entry.TTL)
+	}
+	if err := ctx.Err(); err != nil {
+		return fmt.Errorf("写入缓存失败：%w", err)
+	}
+	payload, err := json.Marshal(entry.Value)
+	if err != nil {
+		return fmt.Errorf("缓存编码失败：%w", err)
+	}
+	operationCtx, cancel := context.WithTimeout(ctx, c.operationTimeout)
+	defer cancel()
+	if err := c.client.Set(operationCtx, entry.Key, payload, entry.TTL).Err(); err != nil {
+		return fmt.Errorf("写入缓存失败：%w", err)
+	}
+	return nil
+}

go/projects/lyra/internal/config/config.go

@@ -10,7 +10,7 @@ type Config struct {
 	App      AppConfig      `mapstructure:"app"`
 	HTTP     HTTPConfig     `mapstructure:"http"`
 	Database DatabaseConfig `mapstructure:"database"`
-	Redis    RedisConfig    `mapstructure:"redis"`
+	Cache    CacheConfig    `mapstructure:"cache"`
 }
 
 type AppConfig struct {
@@ -32,9 +32,11 @@ type DatabaseConfig struct {
 	Password string `mapstructure:"password"`
 }
 
-type RedisConfig struct {
-	Host string `mapstructure:"host"`
-	Port int    `mapstructure:"port"`
+type CacheConfig struct {
+	Host    string `mapstructure:"host"`
+	Port    int    `mapstructure:"port"`
+	DB      int    `mapstructure:"db"`
+	Timeout int    `mapstructure:"timeout"`
 }
 
 func Load(path string) (*Config, error) {

go/projects/lyra/internal/handler/test.go

@@ -1,30 +1,56 @@
 package handler
 
 import (
+	"fmt"
+	"log/slog"
 	"lyra/internal/api"
+	"lyra/internal/cache"
 	"lyra/internal/httpx"
 	"lyra/internal/model"
 	"net/http"
 
+	"time"
+
 	"github.com/gin-gonic/gin"
 )
 
 type TestHandler struct {
 	categoryModel model.CategoryModel
+	cache         *cache.Cache
 }
 
-func NewTestHandler(categoryModel model.CategoryModel) *TestHandler {
-	return &TestHandler{categoryModel: categoryModel}
+func NewTestHandler(categoryModel model.CategoryModel, cache *cache.Cache) *TestHandler {
+	return &TestHandler{categoryModel: categoryModel, cache: cache}
 }
 
 func (h *TestHandler) Hello() gin.HandlerFunc {
-	return func(c *gin.Context) {
-		categories, err := h.categoryModel.FindAll(c.Request.Context())
+	return func(ctx *gin.Context) {
+		categories, err := h.categoryModel.FindAll(ctx.Request.Context())
 		if err != nil {
-			httpx.Fail(c, http.StatusInternalServerError, api.CodeInternalError, "获取分类列表失败")
+			httpx.Fail(ctx, http.StatusInternalServerError, api.CodeInternalError, "获取分类列表失败")
 			return
 		}
-		httpx.OK(c, toCategoryResponses(categories))
+		if err := h.cache.Set(ctx.Request.Context(), cache.Entry[[]*model.Category]{
+			Key:   "test:categories",
+			Value: categories,
+			TTL:   5 * time.Minute,
+		}); err != nil {
+			slog.ErrorContext(ctx.Request.Context(), "缓存分类列表失败")
+			return
+		}
+		testResult, _, err := h.cache.Get[[]*model.Category](ctx.Request.Context(), "test:categories")
+		if err != nil {
+			slog.ErrorContext(ctx.Request.Context(), "获取缓存分类列表失败")
+		}
+		if len(testResult) == 0 {
+			slog.ErrorContext(ctx.Request.Context(), "缓存分类列表为空")
+		} else {
+			for _, v := range testResult {
+				fmt.Printf("%+v\n", v)
+			}
+		}
+
+		httpx.OK(ctx, toCategoryResponses(categories))
 	}
 }
 

go/projects/lyra/internal/handler/test_test.go

@@ -1,128 +0,0 @@
-package handler_test
-
-import (
-	"context"
-	"errors"
-	"net/http"
-	"net/http/httptest"
-	"strings"
-	"testing"
-
-	"lyra/internal/handler"
-	"lyra/internal/model"
-
-	"github.com/gin-gonic/gin"
-)
-
-type fakeCategoryModel struct {
-	categories []*model.Category
-	err        error
-	calls      int
-	gotCtx     context.Context
-}
-
-func (f *fakeCategoryModel) FindAll(ctx context.Context) ([]*model.Category, error) {
-	f.calls++
-	f.gotCtx = ctx
-	return f.categories, f.err
-}
-
-func serveHello(t *testing.T, fake *fakeCategoryModel, req *http.Request) *httptest.ResponseRecorder {
-	t.Helper()
-	gin.SetMode(gin.TestMode)
-	engine := gin.New()
-	engine.GET("/test", handler.NewTestHandler(fake).Hello())
-	recorder := httptest.NewRecorder()
-	engine.ServeHTTP(recorder, req)
-	return recorder
-}
-
-func newHelloRequest() *http.Request {
-	return httptest.NewRequest(http.MethodGet, "/test", nil)
-}
-
-func TestHelloMapsCategoriesToResponse(t *testing.T) {
-	fake := &fakeCategoryModel{categories: []*model.Category{
-		{ID: 1, Slug: "go-basics", Title: "Go 基础", Sort: 1},
-		{ID: 2, Slug: "sql-practice", Title: "SQL 练习", Sort: 2},
-	}}
-
-	recorder := serveHello(t, fake, newHelloRequest())
-
-	if fake.calls != 1 {
-		t.Fatalf("模型调用次数 = %d, want 1", fake.calls)
-	}
-	if recorder.Code != http.StatusOK {
-		t.Fatalf("status = %d, want %d", recorder.Code, http.StatusOK)
-	}
-	want := `{"success":true,"data":[{"id":1,"slug":"go-basics","title":"Go 基础","sort":1},{"id":2,"slug":"sql-practice","title":"SQL 练习","sort":2}]}`
-	if got := recorder.Body.String(); got != want {
-		t.Fatalf("body = %q, want %q", got, want)
-	}
-}
-
-func TestHelloReturnsEmptyArrayForNoCategories(t *testing.T) {
-	tests := []struct {
-		name       string
-		categories []*model.Category
-	}{
-		{name: "空切片", categories: []*model.Category{}},
-		{name: "nil结果", categories: nil},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			fake := &fakeCategoryModel{categories: tt.categories}
-
-			recorder := serveHello(t, fake, newHelloRequest())
-
-			if fake.calls != 1 {
-				t.Fatalf("模型调用次数 = %d, want 1", fake.calls)
-			}
-			if recorder.Code != http.StatusOK {
-				t.Fatalf("status = %d, want %d", recorder.Code, http.StatusOK)
-			}
-			want := `{"success":true,"data":[]}`
-			if got := recorder.Body.String(); got != want {
-				t.Fatalf("body = %q, want %q", got, want)
-			}
-		})
-	}
-}
-
-func TestHelloReturnsInternalErrorOnModelFailure(t *testing.T) {
-	modelErr := errors.New("数据库连接被拒绝: 10.0.0.8:5432")
-	fake := &fakeCategoryModel{err: modelErr}
-
-	recorder := serveHello(t, fake, newHelloRequest())
-
-	if fake.calls != 1 {
-		t.Fatalf("模型调用次数 = %d, want 1", fake.calls)
-	}
-	if recorder.Code != http.StatusInternalServerError {
-		t.Fatalf("status = %d, want %d", recorder.Code, http.StatusInternalServerError)
-	}
-	want := `{"success":false,"error":{"code":10002,"message":"获取分类列表失败"}}`
-	if got := recorder.Body.String(); got != want {
-		t.Fatalf("body = %q, want %q", got, want)
-	}
-	if strings.Contains(recorder.Body.String(), modelErr.Error()) {
-		t.Fatalf("响应泄漏了内部错误信息: %q", recorder.Body.String())
-	}
-}
-
-type contextKey struct{}
-
-func TestHelloPassesRequestContextToModel(t *testing.T) {
-	fake := &fakeCategoryModel{categories: []*model.Category{}}
-	reqCtx := context.WithValue(context.Background(), contextKey{}, "req-42")
-	req := newHelloRequest().WithContext(reqCtx)
-
-	serveHello(t, fake, req)
-
-	if fake.gotCtx != reqCtx {
-		t.Fatalf("模型收到非请求 context: %v", fake.gotCtx)
-	}
-	if got, _ := fake.gotCtx.Value(contextKey{}).(string); got != "req-42" {
-		t.Fatalf("context 值 = %q, want %q", got, "req-42")
-	}
-}