A cls session implementation using async_hooks
Continuation Local Storage works like thread-local storage in threaded programming. This is a implementation of CLS using async_hooks instead of async-listener.
It need running nodejs version >= 8.2.1.
Example
const Session = require('./index')
const session = new Session()
function timeout (id) {
session.scope(() => {
session.set('a', id)
setTimeout(() => {
const a = session.get('a')
console.log(a)
})
})
}
timeout(1)
timeout(2)
timeout(3)
// Output:
// 1
// 2
// 3session middleware in koa
const app = new Koa()
const session = new Session()
const hello = 'hello, world'
app.use(async (ctx, next) => {
ctx.body = hello
await next()
})
app.use(async (ctx, next) => {
await session.scope(async () => {
session.set('userId', 10086)
await next()
})
})
app.use((ctx) => {
const userId = session.get('userId')
console.log(userId)
})
app.listen(10086)
