美好的一天!我有调度程序,我需要检查它的工作时间。我怎样才能做到这一点?我需要在调度程序工作超过5分钟时从someFunction()返回错误
ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
public int someFunction() {
ScheduledFuture<Integer> future =
scheduler.schedule(new ScheduledPrinter(), 10, TimeUnit.SECONDS);
if (scheduler.isShutdown()) {
return future.get();
}
}
private class ScheduledPrinter implements Callable<Integer> {
public Integer call() throws Exception {
// do something
if (!serverResponse.getErrorData().equals("QueueIsNotReady")) {
scheduler.shutdown();
return getResponse();
}
return null;
}
}
答案 0 :(得分:3)
您可以使用以下选项:
scheduler.awaitTermination(5, TimeUnit.MINUTES)
ScheduledFuture<Integer> future =
scheduler.schedule(new ScheduledPrinter(), 10, TimeUnit.SECONDS);
if (!scheduler.awaitTermination(5, TimeUnit.MINUTES)) {
throw new Exception("task did not complete");
}
future.get(5, TimeUnit.MINUTES)
。此方法允许您将调度程序重用于其他任务:
ScheduledFuture<Integer> future =
scheduler.schedule(new ScheduledPrinter(), 10, TimeUnit.SECONDS);
future.get(5, TimeUnit.MINUTES)); // this will throw TimeoutException after 5 minutes
安排另一项任务在5分钟内运行,以检查第一个任务状态。此方法可用于异常处理超时。在这种情况下,someFunction
会立即返回:
ScheduledFuture<Integer> future =
scheduler.schedule(new ScheduledPrinter(), 10, TimeUnit.SECONDS);
scheduler.schedule(() -> {
if (!future.isDone()) {
future.cancel(true); // cancel task if it runs more than 5 minutes
}
}, 5, TimeUnit.MINUTES);