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我很难理解参考进去的工作原理。我想写一个非常简单的内存发布 - 订阅机制。下面的代码:参考进去 - 属性不变
package sockets
import (
"fmt"
"github.com/gorilla/websocket"
)
type hubSingleton struct {
Clients map[string][]*websocket.Conn
}
var instance *hubSingleton
func Hub() *hubSingleton {
if instance == nil {
fmt.Println("New instance created")
instance = &hubSingleton{}
}
instance.Clients = make(map[string][]*websocket.Conn, 6)
return instance
}
func (hub *hubSingleton) Subscribe(channel string, socket *websocket.Conn) error {
if _, ok := hub.Clients[channel]; !ok {
hub.Clients[channel] = make([]*websocket.Conn, 0)
}
hub.Clients[channel] = append(hub.Clients[channel], socket)
fmt.Println("Subscribe: ", hub.Clients)
return nil
}
func (hub *hubSingleton) Publish(channel string, message interface{}) {
fmt.Println("Publish: ", hub.Clients)
if _, ok := hub.Clients[channel]; !ok {
return
}
for i := 0; i < len(hub.Clients[channel]); i++ {
conn := hub.Clients[channel][i]
conn.WriteJSON(Message{status: "ok", content: message})
}
}
的问题是,它似乎每次我打电话集线器()发布()或集线器()订阅()创建一个新的hubSingleton.Client。好吧,我不知道会发生什么,但这里是正在运行的程序的输出:
Publish: map[]
Subscribe: map[chan:[0xc820170000]]
Publish: map[]
Subscribe: map[chan:[0xc82008ac80]]
Publish: map[]
Publish: map[]
Publish: map[]
Subscribe: map[chan:[0xc820170140]]
Publish: map[]
订阅者添加到地图disapear每次我打电话集线器()。 我可以做些什么,使地图上的更改保留在通话之间?
发布你如何调用这段代码的代码。 – eduncan911