Created
November 14, 2017 19:48
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const fs = require('fs'); | |
const async_hooks = require('async_hooks'); | |
let indent = 0; | |
async_hooks.createHook({ | |
init(asyncId, type, triggerAsyncId) { | |
const eid = async_hooks.executionAsyncId(); | |
const indentStr = ' '.repeat(indent); | |
fs.writeSync( | |
1, | |
`${indentStr}${type}(${asyncId}):` + | |
` trigger: ${triggerAsyncId} execution: ${eid}\n`); | |
}, | |
before(asyncId) { | |
const indentStr = ' '.repeat(indent); | |
fs.writeSync(1, `${indentStr}before: ${asyncId}\n`); | |
indent += 2; | |
}, | |
after(asyncId) { | |
indent -= 2; | |
const indentStr = ' '.repeat(indent); | |
fs.writeSync(1, `${indentStr}after: ${asyncId}\n`); | |
}, | |
destroy(asyncId) { | |
const indentStr = ' '.repeat(indent); | |
fs.writeSync(1, `${indentStr}destroy: ${asyncId}\n`); | |
}, | |
promiseResolve(asyncId) { | |
const indentStr = ' '.repeat(indent); | |
fs.writeSync(1, `${indentStr}promiseResolve: ${asyncId}\n`); | |
}, | |
}).enable(); | |
var makePromise = timeout => { | |
return new Promise(done => { | |
setTimeout(() => { | |
console.log('done'); | |
done(); | |
}, timeout); | |
}); | |
}; | |
makePromise(3000).then(() => { | |
fs.writeFile('bar.txt', 'baz', { encoding: 'utf8' }, (e) => { | |
if(e) { | |
console.log(e); | |
} | |
else { | |
console.log('finished'); | |
} | |
}); | |
}); |
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