1 package is;2 3 import java.lang.annotation.Retention ;4 import java.lang.annotation.RetentionPolicy ;5 import java.lang.annotation.Target ;6 import java.lang.annotation.ElementType ;7 8 @Retention (RetentionPolicy.RUNTIME)9 @Target (ElementType.METHOD)10 public @interface Async {11 int timeout() default 0;12 }13