java生产者与消费者

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生产者与消费者模式

1. 直接上代码

 public class StoreHouse
	{
		private int capacity;
		private AtomicInteger size = new AtomicInteger(0);
		private BlockingQueue<Integer> queue;
		
		public StoreHouse(int capacity)
		{
			this.capacity = capacity;
			queue = new ArrayBlockingQueue<>(capacity);
		}
		
		public void producer(int productId)
		{
			try
			{
				queue.put(productId);
			} catch (InterruptedException e)
			{
				e.printStackTrace();
			}
			size.incrementAndGet();
			System.out.println("生成了产品"+productId);
		}
		
	    public void consumer()
	    {
	    	int productId = 0;
	    	try
			{
	    		productId = queue.take();
			} catch (InterruptedException e)
			{
				e.printStackTrace();
			}
	    	size.decrementAndGet();
			System.out.println("当前总产品数："+size+"，消费了产品："+productId);
	      }
	  	  public static void main(String[] args)
			{
	    	StoreHouse storehouse = new StoreHouse(16);
	    	new Thread(new ProducerRunnable(storehouse)).start();
	    	new Thread(new ConsumerRunnable(storehouse)).start();
			
			}
	    }
		class ProducerRunnable implements Runnable
		{
		
			// 所在放置的仓库
			private StoreHouse storehouse;
			public ProducerRunnable(StoreHouse storehouse)
			{
				this.storehouse = storehouse;
			}
			@Override
			public void run()
			{
				while (true)
				{
		             try
					{
						Thread.sleep(100);
					} catch (InterruptedException e)
					{
						e.printStackTrace();
					}		
		     		int productId = new Random().nextInt(100);
		     		storehouse.producer(productId);
				}
			}
		}
		class ConsumerRunnable implements Runnable
		{
			// 所在放置的仓库
			private StoreHouse storehouse;
			public ConsumerRunnable(StoreHouse storehouse)
			{
				this.storehouse = storehouse;
			}
			@Override
			public void run()
			{
				while(true)
				{
			        try
					{
						Thread.sleep(200);
					} catch (InterruptedException e)
					{
						e.printStackTrace();
					}		
					storehouse.consumer();
				}
			}
			
		}

2.总结：a.多个操作方法（生成/消费）最好放在同一个操作类里面，便于同步使用
b.阻塞同步队列可实现消息通知