Golang实现命令队列模式详解

type Command interface {
    Execute()
}

type PrintCommand struct {
    Msg string
}
<p>func (p *PrintCommand) Execute() {
fmt.Println("打印消息:", p.Msg)
}</p><p>type SaveCommand struct {
Data string
}</p><p>func (s *SaveCommand) Execute() {
fmt.Println("保存数据:", s.Data)
}
</p>

type CommandQueue struct {
    commands chan Command
    workers  int
}
<p>func NewCommandQueue(workers int) *CommandQueue {
return &CommandQueue{
commands: make(chan Command, 100), // 缓冲队列
workers:  workers,
}
}</p><p>func (cq *CommandQueue) Start() {
for i := 0; i < cq.workers; i++ {
go func() {
for cmd := range cq.commands {
cmd.Execute()
}
}()
}
}</p><p>func (cq *CommandQueue) AddCommand(cmd Command) {
cq.commands <- cmd
}</p><p>func (cq *CommandQueue) Stop() {
close(cq.commands)
}
</p>

func main() {
    queue := NewCommandQueue(2) // 启动两个工作协程
    queue.Start()
<pre class="brush:php;toolbar:false;">// 提交一些命令
queue.AddCommand(&PrintCommand{Msg: "Hello"})
queue.AddCommand(&SaveCommand{Data: "user123"})
queue.AddCommand(&PrintCommand{Msg: "World"})

// 简单等待
time.Sleep(time.Second)

queue.Stop()

}

打印消息: Hello
保存数据: user123
打印消息: World