async-hooks-6.js

// node-request-context/index.js
const asyncHooks = require('async_hooks');

function createHooks(namespace) {
    function init(asyncId, type, triggerId, resource) {
        // Check if trigger has context
        // Or in other words, check if tigger is part of any request
        if (namespace.context[triggerId]) {
            // Here we keep passing the context from 
            // the triggerId to the new asyncId
            namespace.context[asyncId] = namespace.context[triggerId];
 
       }
    }

    function destroy(asyncId) {
        delete namespace.context[asyncId];
    }

    const asyncHook = asyncHooks.createHook({ init, destroy });

    asyncHook.enable();
}