Micronaut Commands

Published: 2019-03-12, Updated: 2020-05-12

Links

Ciclo de vida

Injetar bean manualmente

Http requests

Parsear data que vem no parameter `@QueryValue`

@Get(value = "/fruits")
public void stuff(@QueryValue @Format("yyyy-MM-dd") LocalDate from){
...

Chamar método ao startar o app

@EventListener
public void eventListener(ApplicationStartupEvent startupEvent){
...
}

Injetar um bean exatamente no startup da app

@Context
public String someBean() {
	return "";
}

Para que serve o micronaut-spring

Ele permite que quem usa spring possa migrar facilmente para o micronaut, basicamente ele vai entender as anotações do spring e injeta-las como beans micronaut ao subir

Profiles and environment / active profiles

export MICRONAUT_ENVIRONMENTS=prod

Buildar imagem nativa

https://github.com/micronaut-guides/micronaut-creating-first-graal-app/blob/4931ead/complete/build.gradle
https://github.com/mageddo/graalvm-examples/tree/678ad8f/micronaut

Trabalhando com requests e responses

https://docs.micronaut.io/1.0.0.M4/guide/index.html#serverIO

Configurando TemplateParser

https://docs.micronaut.io/snapshot/guide/index.html#thymeleaf
Classe para configurar a pasta dos templates: io.micronaut.views.ViewsConfigurationProperties
Classe para configurar o thymeleaf: io.micronaut.views.thymeleaf.ThymeleafViewsRendererConfigurationProperties

Configurar static resources

https://github.com/micronaut-projects/micronaut-examples/blob/master/petstore/storefront/src/main/resources/application.json

Testing

https://github.com/mageddo/micronaut-creating-first-graal-app
https://github.com/mageddo/graalvm-examples/blob/9dd82bd/micronaut/src/test/java/com/mageddo/micronaut/service/FruitsServiceTest.java
https://micronaut-projects.github.io/micronaut-test/1.1.2/guide/index.html

Criar mock para beans

@MicronautTest
class MathMockServiceTest {

  @Inject
  MathService mathService; 


  @ParameterizedTest
  @CsvSource({"2,4", "3,9"})
  void testComputeNumToSquare(Integer num, Integer square) {

      when(mathService.compute(10))
          .then(invocation -> Long.valueOf(Math.round(Math.pow(num, 2))).intValue());

      final Integer result = mathService.compute(10);

      Assertions.assertEquals(
              square,
              result
      );
      verify(mathService).compute(10); 
  }

  @MockBean(MathServiceImpl.class) 
  MathService mathService() {
      return mock(MathService.class); 
  }

}

Fazer redirect

@Get("/swaggerui")
public HttpResponse swaggerUi(){
	return HttpResponse.redirect(URI.create("/swagger-ui?docExpansion=none"));
}

Job Schedulers

@Context // make sure bean will be injected
public class JobTrigger {
	public JobTrigger(
		@Named(TaskExecutors.SCHEDULED) TaskScheduler taskScheduler
	) {
		taskScheduler.schedule("0 */30 * * * *", () -> System.println("Something!"));
	}
}

Injetar propriedades no vo com base em um properties

@Data
@NoArgsConstructor
@ConfigurationProperties(value = "mg.steampowered.api.retry")
public class SteamProps {
	private int maxAttempts;
}

GraalVM Commands Fixar boot do linux