first commit

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/awesomeProject.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/awesomeProject.iml" filepath="$PROJECT_DIR$/.idea/awesomeProject.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

cmd/bookstore/main.go

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+package main
+
+import (
+	"awesomeProject/server"
+	"awesomeProject/store/factory"
+	"context"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+)
+
+func main() {
+	s, err := factory.New("mem") // 创建图书数据存储模块实例
+	if err != nil {
+		panic(err)
+	}
+	srv := server.NewBookStoreServer(":8080", s) // 创建http服务实例
+	errChan, err := srv.ListenAndServe()         // 运行http服务
+	if err != nil {
+		log.Println("web server start failed:", err)
+		return
+	}
+	log.Println("web server start ok")
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)
+	select { // 监视来自errChan以及c的事件
+	case err = <-errChan:
+		log.Println("web server run failed:", err)
+		return
+	case <-c:
+		log.Println("bookstore program is exiting...")
+		ctx, cf := context.WithTimeout(context.Background(), time.Second)
+		defer cf()
+		err = srv.Shutdown(ctx) // 优雅关闭http服务实例
+	}
+	if err != nil {
+		log.Println("bookstore program exit error:", err)
+		return
+	}
+	log.Println("bookstore program exit ok")
+}

go.mod

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+module awesomeProject

internal/store/memstore.go

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+package store

server/middleware/middleware.go

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+package middleware

server/server.go

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+package server

store/factory/factory.go

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+package factory
+
+import (
+	"awesomeProject/store"
+	"fmt"
+	"sync"
+)
+
+var (
+	providersMu sync.RWMutex
+	providers   = make(map[string]store.Store)
+)
+
+func Register(name string, p store.Store) {
+	providersMu.Lock()
+	defer providersMu.Unlock()
+	if p == nil {
+		panic("store: Register provider is nil")
+	}
+	if _, dup := providers[name]; dup {
+		panic("store: Register called twice for provider " + name)
+	}
+	providers[name] = p
+}
+func New(providerName string) (store.Store, error) {
+	providersMu.RLock()
+	p, ok := providers[providerName]
+	providersMu.RUnlock()
+	if !ok {
+		return nil, fmt.Errorf("store: unknown provider %s", providerName)
+	}
+	return p, nil
+}

store/store.go

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+package store
+
+type Book struct {
+	Id      string   `json:"id"`      // 图书ISBN ID
+	Name    string   `json:"name"`    // 图书名称
+	Authors []string `json:"authors"` // 图书作者
+	Press   string   `json:"press"`   // 出版社
+}
+
+type Store interface {
+	Create(*Book) error       // 创建一个新图书条目
+	Update(*Book) error       // 更新某图书条目
+	Get(string) (Book, error) // 获取某图书信息
+	GetAll() ([]Book, error)  // 获取所有图书信息
+	Delete(string) error      // 删除某图书条目
+}