serverless-offline-msk/examples/docker-compose-single-broker/node_modules/@hapi/hapi/lib/streams.js

A serverless offline plugin that enables AWS MSK events

'use strict';

const Boom = require('@hapi/boom');
const Teamwork = require('@hapi/teamwork');


const internals = {
    team: Symbol('team')
};


exports.isStream = function (stream) {

    if (!stream ||
        typeof stream !== 'object' ||
        typeof stream.pipe !== 'function') {

        return false;
    }

    if (typeof stream._read !== 'function') {
        throw Boom.badImplementation('Stream must have a readable interface');
    }

    if (stream._readableState.objectMode) {
        throw Boom.badImplementation('Cannot reply with stream in object mode');
    }

    return true;
};


exports.drain = function (stream) {

    const team = new Teamwork.Team();
    stream[internals.team] = team;

    stream.on('readable', internals.read);
    stream.on('error', internals.end);
    stream.on('end', internals.end);
    stream.on('close', internals.end);

    return team.work;
};


internals.read = function () {

    while (this.read()) { }
};


internals.end = function () {

    this.removeListener('readable', internals.read);
    this.removeListener('error', internals.end);
    this.removeListener('end', internals.end);
    this.removeListener('close', internals.end);

    this[internals.team].attend();
};