如何并行调用两个返回DeferredResult<>的方法？

import org.springframework.web.context.request.async.DeferredResult;

import java.util.concurrent.CompletableFuture;

public class ParallelDeferredResultExample {

    public DeferredResult<String> method1() {
        DeferredResult<String> deferredResult = new DeferredResult<>();

        // 异步处理方法1的逻辑
        CompletableFuture.supplyAsync(() -> {
            // 执行方法1的逻辑
            String result = "Method 1 Result";
            deferredResult.setResult(result);
            return result;
        });

        return deferredResult;
    }

    public DeferredResult<String> method2() {
        DeferredResult<String> deferredResult = new DeferredResult<>();

        // 异步处理方法2的逻辑
        CompletableFuture.supplyAsync(() -> {
            // 执行方法2的逻辑
            String result = "Method 2 Result";
            deferredResult.setResult(result);
            return result;
        });

        return deferredResult;
    }

    public DeferredResult<String> parallelInvoke() {
        DeferredResult<String> deferredResult = new DeferredResult<>();

        // 并行调用方法1和方法2
        CompletableFuture<String> future1 = CompletableFuture.supplyAsync(this::method1);
        CompletableFuture<String> future2 = CompletableFuture.supplyAsync(this::method2);

        // 等待两个方法都执行完成
        CompletableFuture.allOf(future1, future2).thenRun(() -> {
            // 获取方法1和方法2的结果
            String result1 = future1.join();
            String result2 = future2.join();

            // 处理结果并设置给DeferredResult
            String finalResult = result1 + " " + result2;
            deferredResult.setResult(finalResult);
        });

        return deferredResult;
    }
}