生產者消費者【其他模式】

public class ProducerConsumer {
    /**
     * Producer Consumer Pattern【生產者消費者模式】：
     *  將生產者應用與消費者應用解耦，生產者和消費者能夠以不同的速率進行工作。
     */
    @Test
    public void all() throws InterruptedException {
        final ExecutorService threadPool = Executors.newFixedThreadPool(5);
        final BlockingQueue<String> itemQueue = new ArrayBlockingQueue<>(1);
        for (int i = 0; i < 3; i++) {
            threadPool.submit(() -> new Consumer(itemQueue).run());
        }
        for (int i = 0; i < 2; i++) {
            threadPool.submit(() -> new Producer(itemQueue).run());
        }
        threadPool.awaitTermination(2, TimeUnit.SECONDS);
    }
}

@Slf4j
@AllArgsConstructor
class Consumer {
    private final BlockingQueue<String> sharedItemQueue;

    public void run() {
        try {
            while (!Thread.interrupted()) {
                final String item = sharedItemQueue.take();
                log.info("{} consume {}", Thread.currentThread().getName(), item);
            }
        } catch (final InterruptedException e) {
            log.error("", e);
        }
    }
}

@Slf4j
@AllArgsConstructor
class Producer {
    private final BlockingQueue<String> sharedItemQueue;
    private static final AtomicInteger COUNT = new AtomicInteger();

    public void run() {
        try {
            while (!Thread.interrupted()) {
                final String item = Thread.currentThread().getName() + COUNT.incrementAndGet();
                log.info("{} produce {}", Thread.currentThread().getName(), item);
                sharedItemQueue.put(item);
            }
        } catch (final InterruptedException e) {
            log.error("", e);
        }
    }
}