我正在創建一個調度程序并安排一個延遲 2 秒的作業。但在安排特定作業之前，我想檢查 ScheduledExecutorService 的池大小和隊列大小，但我找不到任何方法。任何人都可以向我建議如何在安排任何作業之前檢查 ScheduledExecutorService 的池大小和隊列大小。 //here i have created ScheduledExecutorService private static final ScheduledExecutorService SCHEDULED_EXECUTOR_SERVICE;static { //initialized ScheduledExecutorService with 30 pool size Scheduled_Executor_Service = (ThreadPoolExecutor) Executors.newScheduledThreadPool(30);}public void addTaskTOSchedule(){ //Here i want to check poolsize and queue size of SCHEDULED_EXECUTOR_SERVICE if //ScheduledExecutorService already used more then specific number thread then i will not schedule jobSCHEDULED_EXECUTOR_SERVICE.schedule(() -> { User user = new User(); SCHEDULED_EXECUTOR_SERVICE.execute(user); }, 2000, TimeUnit.MILLISECONDS);}
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紅糖糍粑
TA貢獻1815條經驗 獲得超6個贊
ScheduledExecutorService 接口不允許訪問內部隊列。您必須將服務轉換為實現類才能獲取隊列的大小，如下所示：
ScheduledExecutorService Scheduled_Executor_Service = Executors.newScheduledThreadPool(30);
if (Scheduled_Executor_Service instanceof ScheduledThreadPoolExecutor) {
ScheduledThreadPoolExecutor implementation = (ScheduledThreadPoolExecutor) Scheduled_Executor_Service;
int size = implementation.getQueue().size();
}
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