Micronaut ->合并2个异步HttpClient调用的结果

import io.micronaut.http.client.HttpClient;
import io.micronaut.http.client.annotation.Client;
import io.micronaut.http.annotation.Controller;
import io.micronaut.http.annotation.Get;

import javax.inject.Inject;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

@Controller("/example")
public class ExampleController {

    @Inject
    @Client("http://api1.example.com")
    HttpClient client1;

    @Inject
    @Client("http://api2.example.com")
    HttpClient client2;

    @Get("/mergeResults")
    public String mergeResults() throws ExecutionException, InterruptedException {
        CompletableFuture<String> result1 = client1.toBlocking().retrieve("/endpoint1", String.class).toCompletableFuture();
        CompletableFuture<String> result2 = client2.toBlocking().retrieve("/endpoint2", String.class).toCompletableFuture();

        CompletableFuture<Void> allResults = CompletableFuture.allOf(result1, result2);

        CompletableFuture<String> mergedResult = allResults.thenCompose(voidResult -> {
            String merged = result1.join() + result2.join();
            return CompletableFuture.completedFuture(merged);
        });

        return mergedResult.get();
    }
}