import org.springframework.web.bind.annotation.*;
import org.springframework.web.context.request.async.DeferredResult;
import javax.annotation.PreDestroy;
import java.util.Properties;
import java.util.concurrent.ExecutionException;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.context.request.async.DeferredResult;
import javax.annotation.PreDestroy;
import java.util.Properties;
import java.util.concurrent.ExecutionException;