Java スレッド プールの監視と管理

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;

public class ThreadPoolMonitoring {

    private static final ExecutorService EXECUTOR_SERVICE = Executors.newFixedThreadPool(10);
    private static final AtomicLong INCOMING_TASKS = new AtomicLong(0);
    private static final AtomicLong COMPLETED_TASKS = new AtomicLong(0);

    public static void main(String[] args) {
        // 定期监控线程池状态
        ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
        scheduler.scheduleAtFixedRate(() -> {
            long currentIncoming = INCOMING_TASKS.get();
            long currentCompleted = COMPLETED_TASKS.get();

            System.out.println("线程池状态：");
            System.out.println("已提交的任务：" + currentIncoming);
            System.out.println("已完成的任务：" + currentCompleted);
            System.out.println("活动线程数：" + EXECUTOR_SERVICE.getActiveCount());
            System.out.println("队列中的任务数：" + EXECUTOR_SERVICE.getQueue().size());
            System.out.println("已拒绝的任务数：" + EXECUTOR_SERVICE.getRejectedExecutionCount());
        }, 0, 1, TimeUnit.SECONDS);

        // 提交任务到线程池
        for (int i = 0; i < 100; i++) {
            EXECUTOR_SERVICE.submit(() -> {
                INCOMING_TASKS.incrementAndGet();
                COMPLETED_TASKS.incrementAndGet();
            });
        }
        EXECUTOR_SERVICE.shutdown();
    }
}