构建稳定可靠的消息队列系统：Go语言开发指南

package main

import (
    "fmt"
    "time"
)

type Message struct {
    ID        int
    Type      string
    Timestamp time.Time
    Body      string
}

type Queue struct {
    messages  []Message
    subscribers []chan<- Message
}

func (q *Queue) Publish(msg Message) {
    q.messages = append(q.messages, msg)
    fmt.Printf("Published message: %v
", msg)
    q.NotifySubscribers(msg)
}

func (q *Queue) Subscribe(c chan<- Message) {
    q.subscribers = append(q.subscribers, c)
    fmt.Printf("Subscribed with channel: %v
", c)
}

func (q *Queue) NotifySubscribers(msg Message) {
    for _, c := range q.subscribers {
        c <- msg
    }
}

func main() {
    queue := Queue{}

    ch1 := make(chan Message)
    ch2 := make(chan Message)

    // Subscriber 1
    go func() {
        for msg := range ch1 {
            fmt.Printf("Subscriber 1 received message: %v
", msg)
        }
    }()

    // Subscriber 2
    go func() {
        for msg := range ch2 {
            fmt.Printf("Subscriber 2 received message: %v
", msg)
        }
    }()

    msg1 := Message{ID: 1, Type: "info", Timestamp: time.Now(), Body: "Hello, world!"}
    msg2 := Message{ID: 2, Type: "warning", Timestamp: time.Now(), Body: "Attention, please!"}

    queue.Subscribe(ch1)
    queue.Subscribe(ch2)

    queue.Publish(msg1)
    queue.Publish(msg2)

    time.Sleep(time.Second)
}