sessions example with concurency

main.go

package main

import (
	"fmt"
	"sync"
)

type userSession struct {
	sync.Mutex
	userID   int64
	position string //Position in user story
}

func (user *userSession) set(session string) {
	sessions.Lock()
	defer sessions.Unlock()

	user.position = session
}

type Sessions struct {
	sync.Mutex
	users map[int64]*userSession
}

func (sessions Sessions) set(userID int64, session string) {
	sessions.Lock()
	defer sessions.Unlock()

	sessions.users[userID] = &userSession{userID: userID, position: session}
}

var sessions = Sessions{users: make(map[int64]*userSession)}

func main() {

	sessions.set(1, "blabla")

	fmt.Println(sessions.users[1].position)
	sessions.users[1].set("blablaUpdate")
	fmt.Println(sessions.users[1].position)

}