Golang に基づいて開発されたマイクロサービスはどのようなコア要件をサポートできますか?

package main

import (
    "fmt"
    "sync"
    "time"
)

func main() {
    var wg sync.WaitGroup

    for i := 0; i < 10; i++ {
        wg.Add(1)
        go func(i int) {
            defer wg.Done()
            fmt.Printf("goroutine %d started
", i)
            time.Sleep(1 * time.Second)
            fmt.Printf("goroutine %d finished
", i)
        }(i)
    }

    wg.Wait()
    fmt.Println("All goroutines finished")
}

package main

import (
    "fmt"
    "log"
    "net/http"
    "os"
    "os/signal"
    "syscall"

    "github.com/gorilla/mux"
)

func main() {
    router := mux.NewRouter()
    router.HandleFunc("/hello", helloHandler)

    server := &http.Server{
        Addr:    ":8080",
        Handler: router,
    }

    go func() {
        if err := server.ListenAndServe(); err != nil {
            log.Fatal(err)
        }
    }()

    // 监听系统信号，如Ctrl+C
    stop := make(chan os.Signal, 1)
    signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)

    <-stop

    if err := server.Shutdown(nil); err != nil {
        log.Fatal(err)
    }

    fmt.Println("Server gracefully stopped")
}

func helloHandler(w http.ResponseWriter, r *http.Request) {
    w.Write([]byte("Hello, World!"))
}

package main

import (
    "fmt"
    "log"
    "net/http"

    "github.com/hashicorp/consul/api"
    "github.com/gorilla/mux"
)

func main() {
    consulConfig := api.DefaultConfig()
    consul, err := api.NewClient(consulConfig)
    if err != nil {
        log.Fatal(err)
    }

    agent := consul.Agent()

    registration := &api.AgentServiceRegistration{
        ID:      "microservice-example",
        Name:    "microservice",
        Address: "localhost",
        Port:    8080,
    }

    if err := agent.ServiceRegister(registration); err != nil {
        log.Fatal(err)
    }

    router := mux.NewRouter()
    router.HandleFunc("/hello", helloHandler)

    server := &http.Server{
        Addr:    ":8080",
        Handler: router,
    }

    go func() {
        if err := server.ListenAndServe(); err != nil {
            log.Fatal(err)
        }
    }()

    fmt.Println("Server started")
}

func helloHandler(w http.ResponseWriter, r *http.Request) {
    w.Write([]byte("Hello, World!"))
}

package main

import (
    "fmt"
    "log"

    "github.com/streadway/amqp"
)

func main() {
    conn, err := amqp.Dial("amqp://guest:guest@localhost:5672/")
    if err != nil {
        log.Fatal(err)
    }

    channel, err := conn.Channel()
    if err != nil {
        log.Fatal(err)
    }

    queue, err := channel.QueueDeclare(
        "hello",
        false,
        false,
        false,
        false,
        nil,
    )
    if err != nil {
        log.Fatal(err)
    }

    body := "Hello, World!"

    err = channel.Publish(
        "",
        queue.Name,
        false,
        false,
        amqp.Publishing{
            ContentType: "text/plain",
            Body:        []byte(body),
        },
    )

    if err != nil {
        log.Fatal(err)
    }

    fmt.Println("Message sent")
}

package main

import (
    "fmt"
    "log"
    "time"

    "github.com/afex/hystrix-go/hystrix"
)

const commandName = "myCommand"

func main() {
    hystrix.ConfigureCommand(commandName, hystrix.CommandConfig{Timeout: 1000})

    for i := 0; i < 10; i++ {
        output := make(chan string, 1)
        hystrix.Go(commandName, func() error {
            // 模拟请求
            time.Sleep(200 * time.Millisecond)
            output <- "success"
            return nil
        }, func(err error) error {
            // 处理断路器打开后的逻辑
            output <- "failure"
            return nil
        })

        select {
        case res := <-output:
            fmt.Printf("Response: %s
", res)
        case <-time.After(time.Second * 1):
            fmt.Println("Timeout")
        }
    }

    // 关闭断路器
    hystrix.Flush()
}