Category Archives: Development

Principles of Communications when Developing Messaging Applications

Posted on June 11, 2023 by Erik Calco

This is an intro on the challenges and options to overcome while developing applications involving digital communications, particularly real-time. There are many streaming communication protocol options to choose from, including regular socket communications, WebSockets, MQTT and a Vert.x event bus. … Continue reading →

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The New Stacks Open Development Community

Posted on November 9, 2021 by Erik Calco

participants continue to share the belief that they ‘can do more in concert than individually’ — OpenSource.com I propose developers in the Stacks blockchain ecosystem join together in one identity — The Open Development Community. Our primary objective is to … Continue reading →

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Stacks Blockchain API Architecture – WebSocket message flow

Posted on October 31, 2021 by Erik Calco

This discusses the architecture behind a critical piece for Stacks decentralized apps (dApps) developers: the flow of data from the Stacks Node where the block chain is constructed to the WebSockets service provided in the Stacks Blockchain API. dApps can … Continue reading →

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Simplifying WebSockets User Interface (UI) Clients with Happy Pub/Sub Patterns

Posted on October 26, 2021 by Erik Calco

A back-end WebSocket for live streaming data can typically offer subscriptions to data. Your client UI will typically have one connection to your back-end for all your subscriptions. The challenge becomes how to you handle many components in your UI … Continue reading →

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Learning the Stacks SDK/API – The Demo Client

Posted on October 17, 2021 by Erik Calco

Stacks has a RESTful API and a library called Stacks.js. Stacks.js is a set of libraries for Typescript clients “which provide everything you need to work with the Stacks blockchain.” To develop a better understanding, I created a web client, a … Continue reading →

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Mapping Vue 3 Pages to Firebase Hosting

Posted on May 24, 2021 by Erik Calco

Vue 3 has a concept called pages that let’s you define different HTML pages acting as entry points to your app. You define these in vue.config.js in the root of your project. Here is a sample: module.exports = { pages: … Continue reading →

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Using Duration in Typescript

Posted on January 15, 2020 by Erik Calco

I’m converting Java 8 code to Typescript. Java 8 introduced a great Duration class that uses ChronoUnit to specify units such as DAYS or HOURS. You then instantiate a duration using that: Duration.of(3, SECONDS); Duration.of(465, HOURS); Duration can then interact … Continue reading →

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Creating a new Angular Site on Google Firebase

Posted on January 10, 2020 by Erik Calco

Angular is a framework for creating front-ends for websites. Technically, the site is static from a web hosting perspective, meaning that in and of itself it does not have a database, but rather only serves static files from the web … Continue reading →

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Using JSONP in Angular 8

Posted on September 8, 2019 by Erik Calco

JSONP is one way to get around CORS when getting data from a REST service. It does require a callback feature on the part of the service, which isn’t readily clear in some of the blogs and samples online for … Continue reading →

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