Absinthe for Large Elixir Applications
Patterns for structuring and scaling Absinthe in large Elixir applications.
Sapan Diwakar
Notes on software engineering by Sapan Diwakar — Elixir, Rails, mobile development, and the occasional adventure.
Latest posts
An Introduction to Absinthe
An introduction to building GraphQL APIs in Elixir with Absinthe.
Under the Hood of Ecto
Ecto is a toolkit for mapping database objects to Elixir structs and provides a unified interface to manipulate that data.
Scaling Ruby on Rails Applications
Strategies for scaling Ruby on Rails applications to larger workloads.
Get Started with Hotwire in Your Ruby on Rails App
How to add Hotwire interactivity to a Ruby on Rails application.
A Guide to Event-Driven Architecture in Elixir
A guide to designing responsive, decoupled event-driven systems in Elixir.
Delayed Job vs. Sidekiq: Which Is Better?
A comparison of Delayed Job and Sidekiq for Ruby background processing.
Authorization and Policy Scopes with Elixir/Phoenix
A pattern for authorization and policy scopes in Phoenix contexts and Ecto schemas.
STOMP over a WebSocket client in Elixir
How to implement a STOMP-over-WebSocket client in Elixir.
Connecting your Infrastructure with Wireguard VPN
How to connect infrastructure securely with a WireGuard VPN.
Interfacing Elixir with Other Languages
How to call Ruby and Python processes from Elixir with ExPort.
Dynamic Retry Configuration for ActiveJob on Rails (Sidekiq/Delayed Job/Resque)
How to configure ActiveJob retries dynamically across Rails job backends.
Rails like console for Node JS (and Node TS)
How to build a Rails-like interactive console for Node.js and TypeScript.
Runtime validation with react-hook-form
How to add runtime validation to React Hook Form fields.
Set up a WebSocket Server on Android with GraphQL-WS Protocol
How to run a GraphQL-WS WebSocket server on Android.
[How to] Reduce Heroku Slug Size
Practical ways to reduce a Heroku slug’s size and improve deployment performance.
Eager Load Rails classes during development
How to eager-load Rails classes during development with Zeitwerk.
Mocking with Jest
Jest provides several different ways to mock out things. Here's an effort to list out the most useful ones in a short post.
Best React Component Libraries
A comparison of popular React component libraries for product interfaces.
Multiple html pages with create-react-app app
How to configure multiple HTML entry points in a Create React App project.
Historical Live Data for Android
How to retain and restore historical LiveData values in an Android app.
Garden
A personal remembrance of gardening with the author’s grandmother.
Something about Nature
A personal reflection on the sensory appeal of nature.
Accessing ViewModel inside Views on Android
How to access Android ViewModel state from custom views.
Life of Hari
A reflective short story addressed to Hari at the beginning of his life.
A Tale of Two Sisters
A short story about twin sisters Ava and Emma facing a dangerous secret.
A review of mobile development frameworks
A comparison of React Native, Flutter, and Kotlin for mobile development.
Custom WebSocket implementation with ActionCable on Electron/Node
A custom ActionCable WebSocket client for Electron and Node with MessagePack compression.
Custom WebSocket extension for Rails ActionCable
How to add a custom WebSocket compression extension to Rails ActionCable.
Compressing WebSocket/ActionCable frames on Rails with permessage-deflate
How to compress Rails ActionCable WebSocket frames with permessage-deflate.
Stimulus: A modest JS framework
An introduction to Stimulus for adding focused JavaScript behavior to Rails views.
Adding static methods to existing modules using Declaration Merging in TypeScript
How TypeScript declaration merging adds static methods to existing modules.
Unknown is coming to TypeScript 3.0
An introduction to TypeScript 3.0’s safer unknown type.
Displaying an encoded Polyline on Google Maps
How to decode and display an encoded polyline on Google Maps.
Update Localization on Android at Runtime
How to update an Android app’s locale at runtime.
Audio Processing on Android using TarsosDSP
An introduction to audio processing on Android with TarsosDSP.
Fast track Android app deployments with fastlane
How to automate Android builds and Google Play releases with Fastlane.
Fast track iOS app deployments with fastlane
How to automate iOS builds, signing, and App Store releases with Fastlane.
Prague
A travelogue about a long Easter weekend exploring Prague.
Handling Local Music Playlists
How to store and manage local music playlists with Realm on Android.
Creating a global toolbar (mini music player) on Android
How to add a persistent mini-player toolbar to an Android app.
Creating a Music Player UI on Android
How to build an Android music-player interface.
Android Music Player Controls on Lock Screen and Notifications
How to show Android media controls on the lock screen and in notifications.
Playing music in the background on Android
How to keep Android audio playback running with a Service and MediaPlayer.
Media Player basics for Android
An introduction to Android MediaPlayer setup and basic playback.
Building a Music Player App for Android
An Android music-player tutorial covering project setup and playback.
Why I use Kotlin for Android
Kotlin is a statically typed language developed by JetBrains that targets the JVM.
Refresh OAuth access token with Retrofit, RxJava
How to refresh OAuth access tokens after 401 responses with Retrofit and RxJava.
Refresh OAuth tokens using Moya, RxSwift
How to refresh OAuth tokens after 401 responses with Moya and RxSwift.
Realm for Android
Realm is a mobile database: a replacement for SQLite & Core Data that works for both iOS and Android.