What methods of asynchronous data processing are available in Spring Framework?

In Spring Framework, the following methods are available for asynchronous data processing:

• @Async — an annotation to run methods in a separate thread, returning Future, CompletableFuture, or void.
• CompletableFuture — using Java API for asynchronous programming, integrated with Spring.
• WebFlux — Spring's reactive stack for asynchronous and non-blocking HTTP request processing.
• TaskExecutor — configurable thread pool for executing tasks asynchronously.

Example of using @Async:

@Service
public class AsyncService {
    @Async
    public CompletableFuture<String> process() {
        // Long operation
        return CompletableFuture.completedFuture("Result");
    }
}