我是Akka工具包的新手。我需要在多个文件上运行一个需要相当长时间的进程。所以我为每个文件创建了一个actor并开始处理。我在POJO类中创建这些actor,如下所示:
public class ProcessFiles {
private static final Logger logger = LoggerFactory.getLogger(ProcessFiles.class.getSimpleName());
public static void main(String[] args) throws IOException, InterruptedException {
long startTime = System.currentTimeMillis();
logger.info("Creating actor system");
ActorSystem system = ActorSystem.create("actor_system");
Set<String> files = new HashSet<>();
Stream<String> stringStream = Files.lines(Paths.get(fileName));
stringStream.forEach(line -> files.addAll(Arrays.asList(line.split(","))));
List<CompletableFuture<Object>> futureList = new ArrayList<>();
files.forEach((String file) -> {
ActorRef actorRef = system.actorOf(Props.create(ProcessFile.class, file));
futureList.add(PatternsCS.ask(actorRef, file, DEFAULT_TIMEOUT).toCompletableFuture());
});
boolean isDone;
do {
Thread.sleep(30000);
isDone = true;
int count = 0;
for (CompletableFuture<Object> future : futureList) {
isDone = isDone & (future.isDone() || future.isCompletedExceptionally() || future.isCancelled());
if (future.isDone() || future.isCompletedExceptionally() || future.isCancelled()) {
++count;
}
}
logger.info("Process is completed for " + count + " files out of " + files.size() + " files.");
} while (!isDone);
logger.info("Process is done in " + (System.currentTimeMillis() - startTime) + " ms");
system.terminate();
}
}
这里,ProcessFile是actor类。在调用所有actor以退出程序之后,主进程在每30秒内检查所有actor是否完成。有没有更好的方法来实现这种功能?