当将两个独立的CompletableFuture与返回第三个BiFunction的BiFunction组合时,我试图避免嵌套one。目前,使用thenCombine()并不会削减它:
// What I have
public CompletableFuture<CompletableFuture<C>> doStuff() {
CompletableFuture<A> aFuture = makeSomeA();
CompletableFuture<B> bFuture = makeSomeB();
Completabl
我读到过CompletableFuture有能力将多个期货与runAfterBoth合并,但如果我想合并超过两个呢?
CompletableFuture<Boolean> a = new CompletableFuture<>();
CompletableFuture<Boolean> b = new CompletableFuture<>();
CompletableFuture<Boolean> c = new CompletableFuture<>();
List<CompletableFuture<B
我希望等待多个事件,并决定尝试用CompletableFuture实现这一点。
CompletableFuture a1 = new CompletableFuture();
CompletableFuture a2 = new CompletableFuture();
CompletableFuture a3 = new CompletableFuture();
CompletableFuture b = new CompletableFuture();
CompletableFuture subFuturesA= CompletableFuture.allOf(a1, a2, a3);
C
在CompletableFuture.supplyAsync()的生产环境中发现了一个问题,我们有一个批处理方法,如下所示:
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.stream.Collectors;
public class CompletableFutureProblem {
public voi
由于以下错误,我在使用getPrice()方法返回汽车价格值时遇到了问题:
no instance(s) of type variable(s) U exist so that CompletableFuture<U> conforms to Double inference variable U has incompatible bounds: equality constraints: Double lower bounds: CompletableFuture<U81345>
我希望getPrice返回CompletableFuture<Double>
我正在尝试在AWS EMR群集上启动Flink批处理作业,并获得:
The program finished with the following exception:
org.apache.flink.client.program.ProgramInvocationException: Could not retrieve the execution result. (JobID: c7362754c49bdae8e9a46748d47bc180)
at org.apache.flink.client.program.rest.RestClusterClient.submitJob
我有一个这样的手术, public void createFuture() {
CompletableFuture<Integer> future = CompletableFuture.supplyAsync(() -> 5);
future.thenApply(i -> {
if (i == 5) {
System.out.println("hello, i equals to 5 so expensive operations are unnecessary");
}
我有以下内容:
private JobInfo aggregateJobInfo() {
final JobsResult jobsResult = restClient().getJobs();
final List<String> jobIds = extractJobIds(jobsResult);
//fetch details, exceptions and config for each job
final List<JobDetails> jobDetails = jobIds.stream().map(jobId -&g
public class A{
@Autowired
B b;
public List<String> method1(){
CompletableFuture<List<String>> completableFuture = b.getCompletableFutureList();
// further processing
// returning a list of strings
return completableFuture.get();
}