Overview

PGMQ is a lightweight message queue built on top of PostgreSQL — no extra infrastructure, just your existing database. Keep It Simple Stupid, use postgres.

pgmq4s (codename: Dutchie) is a Scala 3 client for PGMQ, supporting JVM, Scala.js, and Scala Native.

Requires PGMQ v1.11.0+ (topic-based routing). Core messaging works with v1.10.0.

Features

• Typelevel ecosystem — built on Cats Effect with tagless final PgmqClient[F] and PgmqAdmin[F]
• Multiple backends — Doobie, Skunk, Anorm, Slick
• Multiple JSON codecs — Circe, Jsoniter-scala, uPickle, Play JSON, Spray JSON
• Cross-platform — Skunk backend + Circe/Jsoniter/uPickle codecs work on JVM, JS, and Native