How can you enable asynchronous processing in Spring Boot?

A) By using the @Async annotation

B) By using the @EnableAsync annotation

C) By setting spring.async.enabled=true in application.properties

D) Both A and B

Answer:

D) Both A and B

Explanation:

In Spring Boot, you can enable asynchronous processing by using the @EnableAsync annotation in your configuration class and annotating methods with @Async where you want to execute the method asynchronously. This allows you to run methods in a separate thread, improving the performance and responsiveness of your application.

First, enable asynchronous processing by adding the @EnableAsync annotation to your configuration class:


@Configuration
@EnableAsync
public class AsyncConfiguration {
}

Then, you can use the @Async annotation to indicate that a method should be executed asynchronously:


@Service
public class MyService {

    @Async
    public void asyncMethod() {
        // Code to be executed asynchronously
    }
}

When you call asyncMethod(), it will run in a separate thread, allowing the caller to continue without waiting for the method to complete. This is particularly useful for tasks that are time-consuming or do not need to block the main execution flow, such as sending emails or processing large datasets.

Reference links:

Spring Boot Tutorial