Spring Boot #Async is called Synchronously [duplicate] - spring

Question

This question already has an answer here:
Spring 3.x - #Async methods not called concurrently by task executor
(1 answer)
Closed 7 years ago.
I have a long running service method which I'm starting with a rest call from the controller.
Service:
#Service
public class TestServiceImpl implements TestService {
#Override
public void doSomething() {
System.out.println("1: " + DateTime.now());
runLongTask();
System.out.println("2: " + DateTime.now());
}
#Async
private runLongTask() {
System.out.println("Test");
Thread.sleep(10000);
System.out.println("3: "+ DateTime.now());
}
}
In my Application.java I have
private int poolSize = 10;
private int queueCapacity = 10;
#Bean(name="taskExecutor")
public TaskExecutor taskExecutor() {
ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor();
taskExecutor.setMaxPoolSize(this.poolSize);
taskExecutor.setQueueCapacity(this.queueCapacity);
taskExecutor.afterPropertiesSet();
return new ThreadPoolTaskExecutor();
}
And of course I have the #EnableAsync Annotation at my Application.java class
So I would Expect that the output is something like that:
1: 2015-10-23 11:20:00
2: 2015-10-23 11:20:01
Test
3: 2015-10-23 11:20:11

Answer 1

you need to call method from different class to use annotations like #Async or #Transactional. Spring do this stuff by wrapping annotated methods by proxy. In case when you call method from the same class then it has no effect.

Answer 2

According to the documentation you need to implement the AsyncConfigurer interface in your Configuration class (in this case I assume is your Application instance) to override the SimpleAsyncTaskExecutor.
A full example is also shown in the documentation:
#Configuration
#EnableAsync
public class AppConfig implements AsyncConfigurer {
#Bean
public MyAsyncBean asyncBean() {
return new MyAsyncBean();
}
#Override
public Executor getAsyncExecutor() {
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
executor.setCorePoolSize(7);
executor.setMaxPoolSize(42);
executor.setQueueCapacity(11);
executor.setThreadNamePrefix("MyExecutor-");
executor.initialize();
return executor;
}
#Override
public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
return MyAsyncUncaughtExceptionHandler();
}
}
HTH,
Jose Luis