1.1 What’s New?

Micronaut 2.2.3 includes the following changes:

Build Features

Maven Plugin Improvements

The Maven plugin now supports different <packaging> types:

  • jar (default): produces a runnable fat JAR.

  • native-image: generates a GraalVM native image.

  • docker: builds a Docker image with the application artifacts (compiled classes, resources, dependencies, etc).

  • docker-native: builds a Docker image with a GraalVM native image inside.

To package an application, mvn package is the one-stop shop to produce the desired artifact.

It also supports using mvn deploy as the only command required to deploy an application that, depending on the <packaging>:

  • jar (default): will deploy the artifact to a remote repository using org.apache.maven.plugins:maven-deploy-plugin:deploy.

  • docker or docker-native: will push the Docker image to the configured Docker registry.

Read more information in the Maven Plugin documentation.

Gradle Plugin Improvements

The Gradle plugin has a new testNativeImage task that builds the GraalVM Native Image and uses the native application as an embedded server enabling the ability to write native integration tests.

Micronaut Launch Enhancements

Support for Kotlin Gradle Builds

It is now possible to create applications that use build.gradle.kts instead of build.gradle using the --build argument of the CLI:

  1. $ mn create-app demo --build gradle_kotlin && cd demo
  2. $ ./gradlew test

Or via the Micronaut Launch API:

  1. $ curl https://launch.micronaut.io/demo.zip?build=gradle_kotlin -o demo.zip && unzip demo.zip -d demo && cd demo
  2. $ ./gradlew test

Push to Github

It is now possible to create an application with and Micronaut Launch and have it pushed automatically to a repository in your Github account. When generating an application just select the “Push to Github” option.

New Micronaut Modules

MQTT Support

Improving the experience in IoT use cases, Micronaut now has integration with MQTT similar to the integration with Kafka and RabbitMQ. See the Micronaut MQTT documentation to get started.

Micronaut Data R2DBC

A new module that adds support for R2DBC (Reactive Database Connectivity) has been added in preview status. Micronaut Data R2DBC lets you define reactive data repositories using R2DBC that work with any of the supported drivers and include support for GraalVM Native Image.

See the Documentation for Micronaut R2DBC for more information.

Module Upgrades

  • Micronaut Acme 2.1.0

  • Micronaut Aws 2.2.3

  • Micronaut Azure 2.1.0

  • Micronaut Cache 2.2.0

  • Micronaut Cassandra 3.1.0

  • Micronaut Data 2.2.0

  • Micronaut DiscoveryClient 2.2.0

  • Micronaut ElasticSearch 2.1.0

  • Micronaut Flyway 3.1.0

  • Micronaut Gcp 3.3.0

  • Micronaut GraphQL 2.2.0

  • Micronaut Groovy 2.2.0

  • Micronaut gRPC 2.2.0

  • Micronaut Hibernate Validator 3.0.0

  • Micronaut Jmx 2.1.0

  • Micronaut Kafka 3.1.0

  • Micronaut Kotlin 2.2.0

  • Micronaut Liquibase 3.0.0

  • Micronaut MQTT 1.0.0

  • Micronaut Micrometer 3.1.0

  • Micronaut Mongo 3.1.0

  • Micronaut NatsIo 2.2.0

  • Micronaut Neo4j 4.1.0

  • Micronaut OpenApi 2.2.0

  • Micronaut Oracle Cloud 1.1.0

  • Micronaut Picocli 3.1.0

  • Micronaut R2DBC 1.0.0.M2

  • Micronaut RabbitMQ 2.2.0

  • Micronaut Reactor 1.1.0

  • Micronaut Redis 3.1.0

  • Micronaut Rss 2.2.0

  • Micronaut Rss 2.3.0

  • Micronaut RxJava3 1.1.0

  • Micronaut Security 2.1.4

  • Micronaut Security 2.2.0

  • Micronaut Servlet 2.1.1

  • Micronaut Sql 3.3.1

  • Micronaut Test 2.2.1

  • Micronaut Views 2.1.0

  • Micronaut Xml 2.1.0

Dependency Upgrades

  • Caffeine 2.8.6

  • Eclipse Paho v3 1.2.5

  • Eclipse Paho v5 1.2.5

  • Elasticsearch 7.9.3

  • Flyway 7.0.4

  • gRPC 1.33.1

  • Hibernate 5.4.23.Final

  • Kafka 2.6.0

  • Kotlin Coroutines 1.4.1

  • Ktor 1.4.1

  • Liquibase 4.2.0

  • Lombok 1.18.16

  • Oracle JDBC Driver 19.8.0.0

  • Picocli 4.5.2

  • Protobuf 3.14.0

  • Reactor 3.4.0

  • Swagger 2.1.5