将对象列表减少到具有String列表成员的对象中

Question

在以下代码中，使用完整的future实例构建了发送通知的并行请求。这些期货是链接的，我想通过减少各个期货的返回对象来生产一个用MSISDN制成Smsdetails对象。我该如何实现？

@Override
public SmsDetails send(SmsDetails smsDetails) {
    List<CompletableFuture<MibsReturn>> completableFutures =
            smsDetails.getDestinations().stream().map(msisdn -> getMibsReturns(msisdn, smsDetails.getMessage(), smsDetails.getSource())).collect(Collectors.toList());
    CompletableFuture<Void> allFutures = CompletableFuture
            .allOf(completableFutures.toArray(new CompletableFuture[completableFutures.size()]));
    CompletableFuture<List<MibsReturn>> allCompletableFuture = allFutures.thenApply(future -> {
        return completableFutures.stream()
                .map(completableFuture -> completableFuture.join())
                .collect(Collectors.toList());
    });
    CompletableFuture completableFuture = allCompletableFuture.thenApply({
            //code to reduce
    });
    SmsDetails returnSmsDetails = completableFuture.get();
    return returnSmsDetails;
}

private CompletableFuture<MibsReturn> getMibsReturns(String msisdn, String message, String senderId) {
    return CompletableFuture.supplyAsync( () -> {
        return sendViaMibs(msisdn, message, senderId);
    });
}