Golang 마이크로서비스 개발을 통해 어떤 혁신적인 기능을 달성할 수 있나요?

FROM golang:latest WORKDIR /go/src/myapp COPY . . RUN go build -o myapp main.go EXPOSE 8080 CMD ["./myapp"]

package main import ( "fmt" "net/http" "sync" ) func main() { var wg sync.WaitGroup // 创建一个HTTP请求处理函数 handler := func(w http.ResponseWriter, r *http.Request) { wg.Add(1) go func() { defer wg.Done() // 处理请求的业务逻辑 // ... fmt.Fprintf(w, "Hello, World!") }() } // 创建一个HTTP服务器 http.HandleFunc("/", handler) http.ListenAndServe(":8080", nil) wg.Wait() }

package main import ( "fmt" "github.com/streadway/amqp" ) func main() { // 连接到消息队列服务器 conn, err := amqp.Dial("amqp://guest:guest@localhost:5672/") if err != nil { fmt.Println("Failed to connect to RabbitMQ:", err) return } defer conn.Close() // 打开一个通道 ch, err := conn.Channel() if err != nil { fmt.Println("Failed to open a channel:", err) return } defer ch.Close() // 声明一个队列 q, err := ch.QueueDeclare( "hello", // 队列名称 false, // 持久化 false, // 自动删除 false, // 独占队列 false, // No-wait nil, // 参数 ) if err != nil { fmt.Println("Failed to declare a queue:", err) return } // 发送一条消息 err = ch.Publish( "", // 交换机名称 q.Name, // 队列名称 false, // 立即发送处理 false, // 不需要等待确认 amqp.Publishing{ ContentType: "text/plain", Body: []byte("Hello, World!"), }) if err != nil { fmt.Println("Failed to publish a message:", err) return } fmt.Println("Message sent successfully!") }

package main import ( "fmt" "log" "net/http" "os" "github.com/prometheus/client_golang/prometheus" "github.com/prometheus/client_golang/prometheus/promhttp" ) func main() { // 创建一个新的计数器指标 counter := prometheus.NewCounter(prometheus.CounterOpts{ Name: "myapp_requests_total", Help: "The total number of requests to the myapp service.", }) // 将指标注册到默认的注册表中 prometheus.MustRegister(counter) // 增加计数器的值 counter.Inc() // 开启一个HTTP服务器，用于暴露指标接口 http.Handle("/metrics", promhttp.Handler()) addr := fmt.Sprintf(":%s", os.Getenv("PORT")) log.Fatal(http.ListenAndServe(addr, nil)) }