CountDownLatch翻车后，我建议用CompletableFuture改造下

CompletableFuture改造

我先直接分享一下我是如何使用CompletableFuture的吧

// 下载文件总数,初始化
List<Integer> resultList = new ArrayList<>(1000);
ConcurrentHashMap<String, Integer> concurrentHashMap = new ConcurrentHashMap<>();
IntStream.range(0,1000).forEach(resultList::add);

public List<R> sendAsyncBatch(List<P> list, Executor executor, TaskLoader<R,P> loader) {

    List<R> resultList = new CopyOnWriteArrayList<>();
    if (CollectionUtils.isNotEmpty(list)) {
        Executor finalExecutor = executor;
        // 将任务拆分分成每50个为一个任务
        CollUtil.split(list, 50)
                .forEach(tempList -> {
                    CompletableFuture[] completableFutures = tempList.stream()
                            .map(p -> CompletableFuture.supplyAsync(() -> {
                                try {
                                    return loader.load(p);
                                } catch (InterruptedException e) {
                                    e.printStackTrace();
                                }
                                return null;
                            }, finalExecutor)
                                    .handle((result, throwable) -> {
                                        if (Objects.nonNull(throwable)) {
                                            //log.error("async error:{}", throwable.getMessage());
                                        } else if (Objects.nonNull(result)) {
                                            //log.info("async success:{}", result);
                                        } else {
                                            //log.error("async result is null");
                                        }
                                        return result;
                                    }).whenComplete((r, ex) -> {
                                        if (Objects.nonNull(r)) {
                                            resultList.add((R) r);
                                        }
                                    })
                            ).toArray(CompletableFuture[]::new);