Micronaut Codegen

Features

• generate api interfaces (see declarative client)
• generate model objects with fluent and property accessors
• generate interfaces for api tests based on method name and return code
• generate client interfaces with micronaut clientId
• add validation annotations

Config options

• clientId: id for generated clients (if no client id is provided no interface will be generated)
• introspected: add @io.micronaut.core.annotation.Introspected to models (default true)
• dateTimeRelaxed: add type registrar for relaxed time converter (default true)
• useBeanValidation: generate validation annotations (default true)
• useGenericResponse: return generic container or specific model, e.g. Model vs. HttpResponse<Model> (default true)
• useOptional: optional parameters are generated as java.util.Optional (default true)
• useJavaxGenerated: add @javax.annotation.processing.Generated to all classes (default true)
• useLombokGenerated: add @lombok.Generated to all classes (default false), useful for jacoco
• jacksonDatabindNullable: add container JsonNullable to model objects that are nullable (default true)
• supportAsync: use reactivex return types, see Reactive HTTP Request Processing
• useReferencedSchemaAsDefault: use the referenced schema's type for instantiation of default values
• visitable: generate visitor for subtypes with a discriminator (default true)
• pagable: generate provider for pagable (default false)

Null handling and default values

Jackson Inclusions:

• required=true & nullable=false: JsonInclude.ALWAYS
• required=true & nullable=true: JsonInclude.ALWAYS
• required=false & nullable=false: JsonInclude.NON_ABSENT
• required=false & nullable=true: JsonInclude.NON_NULL

Container (array/map):

• required=true & nullable=false: empty containers are set as default value
• required=true & nullable=true: containers have no default value
• required=false & nullable=false: containers have no default value
• required=false & nullable=true: containers have no default value

If jacksonDatabindNullable=true is configured always JsonNullable.undefined() is set.

Do not forget to add the dependency to pom.xml:

<dependency>
 <groupId>org.openapitools</groupId>
 <artifactId>jackson-databind-nullable</artifactId>
 <version>0.2.1</version>
</dependency>

And register Jackson Module:

@Factory
public class ApplicationFactory {

 @Singleton
 JsonNullableModule jsonNullableModule() {
  return new JsonNullableModule();
 }
}

Not supported

• no project (e.g. pom.xml) is generated, only interfaces to implement
• no support for java <11

Build & Release

Test

Run single test:

mvn verify -Dinvoker.parallelThreads=1 -Dinvoker.streamLogs=true -Dinvoker.test=basic

Dependency updates

Display dependency updates:

mvn versions:display-property-updates -U

Update dependencies:

mvn versions:update-properties

Release locally

Run:

mvn release:prepare release:perform release:clean -B