Installation

Prerequisites

PostgreSQL with the PGMQ extension installed
Scala 3 (3.3.x LTS or newer)

Dependencies

Pick one database backend and one JSON codec. The backend pulls in pgmq4s-core transitively — no need to add it yourself.

SBT

libraryDependencies ++= Seq(
  "io.github.matejcerny" %% "pgmq4s-doobie" % "0.8.0",  // backend
  "io.github.matejcerny" %% "pgmq4s-circe"  % "0.8.0"   // JSON codec
)

Scala CLI

//> using dep io.github.matejcerny::pgmq4s-doobie:0.8.0
//> using dep io.github.matejcerny::pgmq4s-circe:0.8.0

Mill

def ivyDeps = Agg(
  ivy"io.github.matejcerny::pgmq4s-doobie:0.8.0",
  ivy"io.github.matejcerny::pgmq4s-circe:0.8.0"
)

Scala.js and Scala Native

For cross-platform projects, use %%% (SBT) or ::: (Mill) instead of %%/:: and pick only the modules that support your platform:

// SBT
libraryDependencies ++= Seq(
  "io.github.matejcerny" %%% "pgmq4s-skunk" % "0.8.0",
  "io.github.matejcerny" %%% "pgmq4s-circe" % "0.8.0"
)

Warning

Play JSON, Spray JSON, Anorm, Doobie, and Slick are JVM-only. Only Skunk and the cross-platform codec modules (Circe, Jsoniter, uPickle) are available on JS and Native.

Available Artifacts

Artifact	Description	Platforms
`pgmq4s-core`	Core types and algebra	JVM, JS, Native
`pgmq4s-circe`	Circe JSON codec bridge	JVM, JS, Native
`pgmq4s-jsoniter`	Jsoniter-scala JSON codec bridge	JVM, JS, Native
`pgmq4s-upickle`	uPickle JSON codec bridge	JVM, JS, Native
`pgmq4s-play-json`	Play JSON codec bridge	JVM only
`pgmq4s-spray-json`	Spray JSON codec bridge	JVM only
`pgmq4s-skunk`	Skunk backend	JVM, JS, Native
`pgmq4s-doobie`	Doobie backend	JVM only
`pgmq4s-anorm`	Anorm backend	JVM only
`pgmq4s-slick`	Slick backend	JVM only

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