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下面是我的代码CompletableFuture.get()和CompletableFuture.join()之间的区别:
List<String> process() {
List<String> messages = Arrays.asList("Msg1", "Msg2", "Msg3", "Msg4", "Msg5", "Msg6", "Msg7", "Msg8", "Msg9",
"Msg10", "Msg11", "Msg12");
MessageService messageService = new MessageService();
ExecutorService executor = Executors.newFixedThreadPool(4);
List<String> mapResult = new ArrayList<>();
CompletableFuture<?>[] fanoutRequestList = new CompletableFuture[messages.size()];
int count = 0;
for (String msg : messages) {
CompletableFuture<?> future = CompletableFuture
.supplyAsync(() -> messageService.sendNotification(msg), executor).exceptionally(ex -> "Error")
.thenAccept(mapResult::add);
fanoutRequestList[count++] = future;
}
try {
CompletableFuture.allOf(fanoutRequestList).get();
//CompletableFuture.allOf(fanoutRequestList).join();
} catch (InterruptedException | ExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return mapResult.stream().filter(s -> !s.equalsIgnoreCase("Error")).collect(Collectors.toList());
}
我试图与这两种方法,但没有什么区别结果。
谢谢
'得到()'需要你捕获检查的异常。当你从'get()'改变到'join()'时你应该注意到它的区别,因为你会立即得到一个编译器错误,说'try'块中没有抛出'InterruptedException'和'ExecutionException'。 – Holger
@ holi-java:'join()'不能被打断。 – Holger
@霍尔是的,先生。我发现我不能打断任务。 –