Pavlo Pavlo - 2 months ago 258
Java Question

Spring boot. How to Create TaskExecutor with Annotation?

I did a

@Service
class in Spring Boot application with one of the methods that should run asynchronously. As I read method should be
@Async
annotated and also I have to run a
TaskExecutor
bean. But in Spring manual http://docs.spring.io/spring/docs/current/spring-framework-reference/html/scheduling.html I not find any info or example how to run
TaskExecutor
with annotation, without XML config. Is it possible to create
TaskExecutor
bean in Spring Boot without XML, with annotations only? Here my Service class:

@Service
public class CatalogPageServiceImpl implements CatalogPageService {

@Override
public void processPagesList(List<CatalogPage> catalogPageList) {
for (CatalogPage catalogPage:catalogPageList){
processPage(catalogPage);
}
}

@Override
@Async("locationPageExecutor")
public void processPage(CatalogPage catalogPage) {
System.out.println("print from Async method "+catalogPage.getUrl());
}
}

Answer

Add a @Bean method to your Spring Boot application class:

@SpringBootApplication
@EnableAsync
public class MySpringBootApp {

    @Bean
    public TaskExecutor taskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(5);
        executor.setMaxPoolSize(10);
        executor.setQueueCapacity(25);
        return executor;
    }

    public static void main(String[] args) {
        // ...
    }
}

See Java-based container configuration in the Spring Framework reference documentation on how to configure Spring using Java config instead of XML.

(Note: You don't need to add @Configuration to the class because @SpringBootApplication already includes @Configuration).

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