The code is as follows; this is an asynchronous method Annotated with the @Async annotation.
// interface
@Async("ioTaskExecutor")
CompletableFuture<List<BufferedImage>> getPdfImages(String pdfPath);
//impl
…...asynchronous method annotated with the @Async annotation. // interface...springframework.web.servlet.mvc.method.annotation.ServletInvocableHand.inv...