async-hooks-logger

async-hooks-logger provides an API to register callbacks tracking the lifetime of asynchronous resources created inside a Node.js application.

Usage

``js
const asyncHooks = require('async-hooks-logger');
const fs = require('fs');
asyncHooks.create(data => {
fs.writeSync(1, async_hooks: ${JSON.stringify(data)} \n);
});
`

$3

`json
{
"asyncId": 79,
"triggerAsyncId": 29,
"type": "HTTPPARSER",
"isRelease": true,
"startTime": 1522663778957,
"endTime": 1522663898959,
"duration": 120002
}
`

you can use duration to finger out the resources lifetime.

Deveop

`shell
git clone git@github.com:stephenkingsley/async-hooks-logger.git
cd async-hooks-logger
npm run dev
`

and your will see something in the iTerm!

`
async_hooks {"asyncId":79,"triggerAsyncId":29,"type":"WRITEWRAP","isRelease":true,"startTime":1522663778957,"endTime":1522663778957,"duration":0}
async_hooks {"asyncId":80,"triggerAsyncId":29,"type":"TickObject","isRelease":true,"startTime":1522663778957,"endTime":1522663778957,"duration":0}
async_hooks {"asyncId":81,"triggerAsyncId":29,"type":"TickObject","isRelease":true,"startTime":1522663778957,"endTime":1522663778957,"duration":0}
async_hooks {"asyncId":78,"triggerAsyncId":42,"type":"TCPWRAP","isRelease":true,"startTime":1522663778956,"endTime":1522663778958,"duration":2}
async_hooks {"asyncId":12,"triggerAsyncId":3,"type":"TickObject","isRelease":true,"startTime":1522663778957,"endTime":1522663778960,"duration":3}
async_hooks {"asyncId":13,"triggerAsyncId":12,"type":"TickObject","isRelease":true,"startTime":1522663778957,"endTime":1522663778960,"duration":3}
async_hooks {"asyncId":18,"triggerAsyncId":13,"type":"TickObject","isRelease":true,"startTime":1522663778959,"endTime":1522663778960,"duration":1}
async_hooks {"asyncId":19,"triggerAsyncId":17,"type":"TickObject","isRelease":true,"startTime":1522663778962,"endTime":1522663778962,"duration":0}
async_hooks {"asyncId":15,"triggerAsyncId":13,"type":"Timeout","isRelease":true,"startTime":1522663778959,"endTime":1522663898959,"duration":120000}
async_hooks {"asyncId":14,"triggerAsyncId":13,"type":"TIMERWRAP","isRelease":true,"startTime":1522663778959,"endTime":1522663898959,"duration":120000}
async_hooks {"asyncId":17,"triggerAsyncId":13,"type":"HTTPPARSER","isRelease":true,"startTime":1522663778959,"endTime":1522663898959,"duration":120000}
async_hooks {"asyncId":11,"triggerAsyncId":0,"type":"TCPWRAP","isRelease":true,"startTime":1522663778957,"endTime":1522663898959,"duration":120002}
``