3/15/2023 0 Comments Uncomment a line in pgadmin 4![]() JavaScript paired with MQTT provides a versatile foundation for systems programming, event-driven microservices, event-driven frontends, and more. The language is becoming increasingly expressive thanks to ECMAScript and today's ESNext (the latest version of the ECMAScript specification), and build tools are becoming easier and easier to use thanks to Babel and low touch bundlers like Parcel. JavaScript is becoming a lingua franca for newly minted programmers coming out of university programs, and the ecosystem is full of innovative libraries that solve many categories of problems. In this section you're going to build the Node.js MQTT producer application: If you do not already have access to a Solace PubSub+ Event Broker and have never set up a Solace PubSub+ Event Broker: Cloud messaging service before, follow the setup instructions here: Creating Your First Messaging Service - 1.0 documentation. You get to take for granted that they're all able to connect and communicate with each other. Open protocol support and any-to-any protocol translation for its supported protocols built into the broker means there is absolutely no vendor lock-in with Solace and you get to build using whatever tools you'd like. There's no better tool for beating analysis paralysis than the Solace PubSub+ Event Broker. ⏩ Skip this section if you already have access to a Solace PubSub+ Event Broker. In this section you're going to start a Solace Messaging Service that will connect everything else we build: Code AccessĬlone the code used in this CodeLab: git clone This CodeLab uses Docker, so if you don't already have it installed: Get Docker. ![]() This CodeLab uses Node.js, so if you don't already have it installed: Get Node.js using a package manager. You can use it as an alternative to traditional ORMs such as Sequelize, TypeORM or Knex.js. Prisma Client JS is an auto-generated database client that enables type-safe database access and reduces boilerplate.pgAdmin 4 is a web based administration tool for the PostgreSQL database.Heroku offers a managed Postgres service with a generous free tier, and scaling up is effortless.MQTT.js is a client library for the MQTT protocol, written in JavaScript for Node.js and the browser.It was designed as an extremely lightweight publish/subscribe messaging transport. MQTT is a machine-to-machine (M2M)/"Internet of Things" connectivity protocol.Enterprise-grade messaging as a service, on demand in your favorite public and virtual private clouds.Configure Prisma Client JS on the consumer to create items in the database.Use pgadmin4 to add a table to a Postgres database.Use pgadmin4 to administer a Postgres database (optional).Start a free managed Postgres service using Heroku.Start a Solace PubSub+ Event Broker: Cloud messaging service (optional).I hope you enjoy the CodeLab, and please do let us know on our community site if there's a topic you'd like covered. The more important takeaways of this CodeLab are learning how to connect the services together and working with the MQTT and Postgres clients. This CodeLab will implement a contrived user registration event flow, but don't pay attention to the event payloads. This tech stack can be extended to support a wide range of use cases, ranging from systems programming to event-driven frontends. In this CodeLab, I'm going to put my personal strategy into action and walk through how to setup one of my favorite tech stacks: Solace PubSub+, JavaScript, MQTT, and PostgreSQL. Since both the event mesh and each one of its nodes (the tools) are scalable, I get to tinker with app specific business logic knowing that what I'm building can scale if I need it to. After picking the tools for my job, I configure an event mesh using Solace's PubSub+ Event Brokers and plug the tools into it. My personal strategy for beating analysis paralysis goes something like this: default to using well-vetted open source protocols, languages, and frameworks, and whenever possible, leverage free tier SaaS products. I'm going to be the person behind this casually worded technical guide, okay? My name is Andrew Roberts and I'm a systems engineer at Solace. In this codelab you're going to learn how to build and manage the tech stack shown by the architecture diagram below: Tech Stack Tutorial: Wiring Together Solace PubSub+, JavaScript, MQTT, and PostgreSQL
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