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85 lines
2.8 KiB
85 lines
2.8 KiB
// media.js
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// Copyright (C) 2022 DTP Technologies, LLC
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// License: Apache-2.0
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'use strict';
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const path = require('path');
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require('dotenv').config({ path: path.resolve(__dirname, '..', '..', '.env') });
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const mongoose = require('mongoose');
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const { SitePlatform, SiteLog, SiteWorker } = require(path.join(__dirname, '..', '..', 'lib', 'site-lib'));
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module.pkg = require(path.resolve(__dirname, '..', '..', 'package.json'));
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module.config = {
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environment: process.env.NODE_ENV,
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root: path.resolve(__dirname, '..', '..'),
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component: { name: 'mediaWorker', slug: 'media-worker' },
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};
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/**
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* Provides background media processing for the DTP ecosystem.
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*
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* Background media processing is simply a way of life for scalable Web
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* architectures. You don't want to force your site member to sit there and
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* watch a process run. You want to accept their file, toss it to storage, and
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* create a job to have whatever work needs done performed.
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*
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* This obviously induces a variable amount of time from when the site member
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* uploads the file until it's ready for online distribution. The system
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* therefore facilitates ways to query the status of the job and to receive a
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* notification when the work is complete.
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*
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* This worker serves as a starting point or demonstration of how to do
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* background media processing at scale and in production. This is the exact
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* code we use to run the Digital Telepresence Platform every day.
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*/
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class MediaWorker extends SiteWorker {
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constructor (dtp) {
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super(dtp, dtp.config.component);
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}
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async start ( ) {
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await super.start();
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if (process.argv[2]) {
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const stickerId = mongoose.Types.ObjectId(process.argv[2]);
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this.log.info('creating sticker processing job', { stickerId });
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const queue = this.getJobQueue('media');
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await queue.add('sticker-ingest', { stickerId });
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}
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await this.loadProcessor(path.join(__dirname, 'media', 'job', 'sticker-ingest.js'));
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await this.loadProcessor(path.join(__dirname, 'media', 'job', 'sticker-delete.js'));
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await this.loadProcessor(path.join(__dirname, 'media', 'job', 'attachment-ingest.js'));
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await this.loadProcessor(path.join(__dirname, 'media', 'job', 'attachment-delete.js'));
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await this.startProcessors();
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}
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async stop ( ) {
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await super.stop();
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}
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}
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(async ( ) => {
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try {
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module.log = new SiteLog(module, module.config.component);
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await SitePlatform.startPlatform(module, module.config.component);
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module.worker = new MediaWorker(module);
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await module.worker.start();
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module.log.info(`${module.pkg.name} v${module.pkg.version} ${module.config.component.name} started`);
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} catch (error) {
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module.log.error('failed to start worker', {
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component: module.config.component,
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error,
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});
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process.exit(-1);
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}
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})();
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