1.1 What’s New?

Micronaut 2.1.4 includes the following changes:

Core Features

Introspections for JDK 14 Records

It is now possible to define bean introspections on JDK 14+ record types (note these currently require the ––enable–preview flag to the compiler and JVM).

@Client + Kotlin

@Client interfaces now support suspend methods!

Default Environment

Micronaut 2.1 introduces the concept of a default environment. One or more default environments can be set and they will apply if no other environments are explicitly specified or deduced. See the environments documentation for information on how to use this new feature.

@Order Annotation

The @Order annotation has been added to support supplying bean order for factory methods or for those who prefer the use of annotations over the Ordered interface.

Kotlin 1.4

Micronaut now ships with Kotlin 1.4 for those users using Kotlin.

Build Features

New Gradle Plugin

A new Gradle plugin is available that provides a more expressive way to define a Micronaut application and includes awesome new features for GraalVM Native Image and Docker. The minimum required build to build a Micronaut application is now:

Micronaut Minimal Gradle Build

  1. plugins {
  2.      id 'io.micronaut.application' version '{version}'
  3. }
  4. repositories {
  5.     jcenter()
  6.     mavenCentral()
  7. }
  9. micronaut {
  10.     version = "2.1.0" // The Micronaut Version
  11.     runtime "netty" // Using the Netty runtime
  12. }
  13. mainClassName = "example.Application" // Your main class

Building a Native Image is then as simple as:

  1. $ ./gradlew nativeImage

Whilst building a docker image using GraalVM Native Image can be done with:

  1. $ ./gradlew dockerBuildNative
  3. # Or to push a native image to a Docker registry
  4. $ ./gradlew dockerPushNative

Web Features

Client Binding API

A new API has been created to allow for binding declarative HTTP client method arguments to an HTTP request. See the documentation for more information.

Websocket Improvements

Query parameters are now respected and bindable in the Micronaut websocket support.

HttpResponse Improvements

Cookies in HTTP responses from the client side are now retrievable on the HttpResponse. These are the cookies found in the Set-Cookie header.

Cloud Features

Support for Oracle Cloud SDK

A new GraalVM Native Image compatible module for Oracle Cloud SDK has been added allowing you to use any part of the Oracle Cloud SDK with Native Image and also enhancing the SDK with RxJava 2 support.

Support for Oracle Function

Support has been added for building Oracle Functions deployable to Oracle Cloud including the ability to compute the functions in native images using GraalVM.

Support for Google Pub/Sub

Thanks to Vinicius Carvalho at Google, Micronaut now features dedicated support for Google Pub/Sub for seamless messaging in Google Cloud.

Support for Google Cloud Log Format

Thanks to Vinicius Carvalho at Google, Micronaut can now output logs in the official JSON format supported by Stackdriver on Google Cloud

Liveness/Readiness Probes

Micronaut’s /health endpoint now allows you to distinguish liveness and readiness probes at the URIs /health/liveness and /health/readiness. Micronaut Launch’s Kubernetes support has been updated to generate a Kubenetes descriptor that is configured to with these probe endpoints by default.

Module Upgrades

  • Micronaut AWS 2.1.0

  • Micronaut Acme 2.0.0

  • Micronaut Azure 2.0.1

  • Micronaut Cache 2.1.0

  • Micronaut Cassandra 3.0.0

  • Micronaut Data 2.0.0

  • Micronaut Elasticsearch 2.0.1

  • Micronaut Flyway 2.1.1

  • Micronaut GCP 3.2.1

  • Micronaut GraphQL 2.1.0

  • Micronaut Groovy 2.1.0

  • Micronaut gRPC 2.0.5

  • Micronaut Ignite 1.0.0.RC1

  • Micronaut Kafka 3.0.0

  • Micronaut Kotlin 2.1.1

  • Micronaut Liquibase 2.1.0

  • Micronaut Micrometer 3.0.1

  • Micronaut Mongo DB 3.0.0

  • Micronaut Neo4j 4.0.0

  • Micronaut Open API 2.1.0

  • Micronaut Oracle Cloud 1.0.0

  • Micronaut Picocli 3.0.0

  • Micronaut RabbitMQ 2.1.0

  • Micronaut Redis 3.0.0

  • Micronaut Security 2.1.0

  • Micronaut Servlet 2.0.0

  • Micronaut Sql 3.1.0

  • Micronaut Test 2.1.0

  • Micronaut Xml 2.0.0

Dependency Upgrades

  • Commons Dbcp 2.8.0

  • Dekorate 1.0.3

  • Elasticsearch 7.8.1

  • Flyway 6.5.4

  • gRPC 1.32.1

  • Hibernate 5.4.21.Final

  • Ignite 2.8.1

  • JUnit 5.7.0

  • Kotlin 1.4.10

  • Ktor 1.4.0

  • Liquibase 3.10.2

  • MSSQL Driver 8.4.1.jre8

  • MariaDB Driver 2.6.2

  • Micrometer 1.5.5

  • Mongo Driver 4.1.0

  • Mongo Reactive Driver 4.1.0

  • Neo4j Driver 4.1.1

  • Netty 4.1.52.Final

  • Picocli 4.5.1

  • Postgres Driver 42.2.16

  • Redis Lettuce 5.3.4.RELEASE

  • Tomcat Jdbc 9.0.38