Java 转换列表<;完全未来<;T>&燃气轮机;完成未来<;列表<;T>&燃气轮机;
我有一个方法Java 转换列表<;完全未来<;T>&燃气轮机;完成未来<;列表<;T>&燃气轮机;,java,asynchronous,java-8,completable-future,Java,Asynchronous,Java 8,Completable Future,我有一个方法doTransmit,它返回一个CompletableFuture。我想在一个循环中调用doTransmit,收集所有CompletableFuture,并将其转换为CompletableFuture,当所有收集的CompletableFuture都已解析后,该CompletableFuture将与列表一起解析 CompletableFuture<DeliveryResponse> doTransmit(Notification notification, Receive
doTransmit
,它返回一个CompletableFuture
。我想在一个循环中调用doTransmit
,收集所有CompletableFuture
,并将其转换为CompletableFuture
,当所有收集的CompletableFuture
都已解析后,该CompletableFuture
将与列表一起解析
CompletableFuture<DeliveryResponse> doTransmit(Notification notification, Receiver receiver, ContentMutator contentMutator) {
//send notification to this receiver
}
CompletableFuture<List<DeliveryResponse>> doTransmit(Notification notification, List<Receiver> receivers, ContentMutator contentMutator) {
List<CompletableFuture<DeliveryResponse>> completableFutures = new ArrayList<>();
receivers.forEach(receiver -> completableFutures.add(doTransmit(notification.clone(), receiver, contentMutator)));
CompletableFuture<List<DeliveryResponse>> listCompletableFuture = CompletableFuture.supplyAsync(ArrayList::new);
completableFutures.forEach(
completableFuture ->
completableFuture.thenCombine(listCompletableFuture,
((deliveryResponse, deliveryResponses) -> deliveryResponses.add(deliveryResponse))
)
);
return listCompletableFuture;
}
CompletableFuture DotTransmit(通知通知、接收者接收者、ContentMutator ContentMutator){
//向此接收者发送通知
}
CompletableFuture DotTransmit(通知通知、列表接收者、ContentMutator ContentMutator){
List completableFutures=新建ArrayList();
receivers.forEach(receiver->completableFutures.add(doTransmit(notification.clone(),receiver,contentMutator));
CompletableFuture列表CompletableFuture=CompletableFuture.SupplySync(ArrayList::new);
完全期货(
可完成的未来->
completableFuture。然后合并(列出completableFuture,
((deliveryResponse,deliveryResponses)->deliveryResponses.add(deliveryResponse))
)
);
回归未来;
}
但是当我调用第二个doTransmit(通知,接收者,null)时,然后调用accept(list->System.out.println(list.size())代码>收到的列表为空
我不熟悉完全未来的概念。然而,我知道Javascript的承诺。请提供帮助。您需要的是一个供应商
,该供应商负责收集回复:
// your code
List<CompletableFuture<DeliveryResponse>> completableFutures = new ArrayList<>();
receivers.forEach(receiver -> completableFutures.add(doTransmit(notification.clone(), receiver, contentMutator)));
Supplier<List<DeliveryResponse>> responseCollector = () -> {
List<DeliveryResponse> result = new ArrayList<>();
// get the result for each... I think you need to try-catch this
receivers.forEach(r -> result.add(r.get());
return result;
}
现在,listfourture
通过调用每个期货的get
来收集结果。因此您需要一个CompletableFuture
包含另一个CompletableFuture
s的List
结果的列表。我不知道你为什么想要完整的未来
。。。T
s将已计算。从列表中,我可以检查有多少通知已发送或失败。在receivers.forEach(r->result.add(r.get());
r
不是CompletableFuture
的实例。
CompletableFuture<List<DeliveryResponse>> listFuture = CompletableFuture.supplyAsync(responseCollector);
return listFuture;