Java 类org.apache.camel.util.concurrent.RejectableScheduledThreadPoolExecutor 实例源码

@Override
public ScheduledExecutorService newScheduledThreadPool(ThreadPoolProfile profile, ThreadFactory threadFactory) {
    RejectedExecutionHandler rejectedExecutionHandler = profile.getRejectedExecutionHandler();
    if (rejectedExecutionHandler == null) {
        rejectedExecutionHandler = new ThreadPoolExecutor.CallerRunsPolicy();
    }

    ScheduledThreadPoolExecutor answer = new RejectableScheduledThreadPoolExecutor(profile.getPoolSize(), threadFactory, rejectedExecutionHandler);
    answer.setRemoveOnCancelPolicy(true);

    // need to wrap the thread pool in a sized to guard against the problem that the
    // JDK created thread pool has an unbounded queue (see class javadoc), which mean
    // we could potentially keep adding tasks, and run out of memory.
    if (profile.getMaxPoolSize() > 0) {
        return new SizedScheduledExecutorService(answer, profile.getMaxQueueSize());
    } else {
        return answer;
    }
}

@Override
public ScheduledExecutorService newScheduledThreadPool(ThreadPoolProfile profile, ThreadFactory threadFactory) {
    RejectedExecutionHandler rejectedExecutionHandler = profile.getRejectedExecutionHandler();
    if (rejectedExecutionHandler == null) {
        rejectedExecutionHandler = new ThreadPoolExecutor.CallerRunsPolicy();
    }

    ScheduledThreadPoolExecutor answer = new RejectableScheduledThreadPoolExecutor(
        profile.getPoolSize(), managedThreadFactory, rejectedExecutionHandler);

    if (profile.getMaxPoolSize() > 0) {
        return new SizedScheduledExecutorService(answer, profile.getMaxQueueSize());
    } else {
        return answer;
    }
}