await/signal/lock实现生产消费者模式

存储类GoodStorage：

package main.wll.fish.product;import java.util.ArrayList;import java.util.List;import java.util.concurrent.locks.Condition;import java.util.concurrent.locks.Lock;import java.util.concurrent.locks.ReentrantLock;public class GoodStorage {private static final int SIZE = 2;private List<Good> storage = new ArrayList<Good>(SIZE);// 锁private final Lock lock = new ReentrantLock();// 仓库满的条件变量private final Condition full = lock.newCondition();// 仓库空的条件变量private final Condition empty = lock.newCondition();public void add(Good good) {lock.lock();{while (storage.size() >= SIZE) {try {System.out.println(Thread.currentThread().getName() + "------>product wait.... now ListSIze:"+ storage.size());full.await();} catch (InterruptedException e) {e.printStackTrace();}}storage.add(good);System.out.println(Thread.currentThread().getName() + "------>product :" + good.toString()+ ", now ListSIze:" + storage.size());empty.signalAll();}lock.unlock();}public void remove() {lock.lock();{while (storage.size() == 0) {try {System.out.println(Thread.currentThread().getName() + "------>consume wait....  now ListSIze:"+ storage.size());empty.await();} catch (InterruptedException e) {e.printStackTrace();}}Good good = storage.get(0);storage.remove(0);System.out.println(Thread.currentThread().getName() + "------------------------------------>consume :"+ good.toString() + ", now ListSIze:" + storage.size());full.signalAll();}lock.unlock();}}class Good {public long id;public Good(long id) {this.id = id;}public String toString() {return String.format("Good-%d", this.id);}}

生产者：

[java] view plaincopyprint?

1. import java.util.Random;  
2. import java.util.concurrent.atomic.AtomicInteger;  
3.   
4. class Producter implements Runnable {  
5.     private static AtomicInteger ato = new AtomicInteger(0);  
6.       
7.     private GoodStorage store;  
8.     public Producter(GoodStorage store ){  
9.         this.store = store;  
10.     }  
11.       
12.       
13.     public void run() {  
14.         while(true){  
15.             try {  
16.                 Thread.currentThread().sleep(new Random().nextInt(1000));  
17.                 // queue.put(new Good(System.currentTimeMillis()));  
18.                 store.add(new Good(ato.incrementAndGet()));  
19.             } catch (InterruptedException e) {  
20.                 e.printStackTrace();  
21.             }  
22.         }  
23.     }  
24. }  

消费者：

[java] view plaincopyprint?

1. import java.util.Random;  
2.   
3. class Consumer implements Runnable {  
4.     private GoodStorage store;  
5.     public Consumer(GoodStorage store ){  
6.         this.store = store;  
7.     }  
8.       
9.   
10.     public void run() {  
11.         while(true){  
12.             try {  
13.                 Thread.currentThread().sleep(new Random().nextInt(1000));  
14.                 store.remove();  
15.                   
16.             } catch (InterruptedException e) {  
17.                 e.printStackTrace();  
18.             }  
19.         }  
20.     }  
21. }  

运行主类：

[java] view plaincopyprint?

1. import java.util.concurrent.ExecutorService;  
2. import java.util.concurrent.Executors;  
3.   
4. public class Main {  
5.     static ExecutorService pool = Executors.newCachedThreadPool();  
6.       
7.     public static void main(String[] args) {  
8.         GoodStorage store = new GoodStorage();  
9.         pool.execute(new Producter(store));  
10.         pool.execute(new Producter(store));  
11.         pool.execute(new Producter(store));  
12.           
13.         pool.execute(new Consumer(store));  
14.         pool.execute(new Consumer(store));  
15.     }  
16. }  

运行结果：

pool-1-thread-8------>product wait.... now ListSIze:2pool-1-thread-12------>product wait.... now ListSIze:2pool-1-thread-1------>product wait.... now ListSIze:2pool-1-thread-7------>product wait.... now ListSIze:2pool-1-thread-13------>product wait.... now ListSIze:2pool-1-thread-9------>product wait.... now ListSIze:2pool-1-thread-17------>product wait.... now ListSIze:2pool-1-thread-16------>product wait.... now ListSIze:2pool-1-thread-5------>product wait.... now ListSIze:2pool-1-thread-20------------------------------------>consume :Good-34532, now ListSIze:1pool-1-thread-20------------------------------------>consume :Good-34533, now ListSIze:0pool-1-thread-20------>consume wait....  now ListSIze:0pool-1-thread-21------>consume wait....  now ListSIze:0pool-1-thread-6------>product :Good-34534, now ListSIze:1pool-1-thread-6------>product :Good-34535, now ListSIze:2pool-1-thread-6------>product wait.... now ListSIze:2pool-1-thread-10------>product wait.... now ListSIze:2pool-1-thread-2------>product wait.... now ListSIze:2pool-1-thread-14------>product wait.... now ListSIze:2pool-1-thread-18------>product wait.... now ListSIze:2pool-1-thread-3------>product wait.... now ListSIze:2pool-1-thread-11------>product wait.... now ListSIze:2pool-1-thread-15------>product wait.... now ListSIze:2pool-1-thread-19------>product wait.... now ListSIze:2pool-1-thread-4------>product wait.... now ListSIze:2pool-1-thread-8------>product wait.... now ListSIze:2pool-1-thread-12------>product wait.... now ListSIze:2pool-1-thread-1------>product wait.... now ListSIze:2pool-1-thread-7------>product wait.... now ListSIze:2pool-1-thread-13------>product wait.... now ListSIze:2pool-1-thread-9------>product wait.... now ListSIze:2pool-1-thread-17------>product wait.... now ListSIze:2pool-1-thread-16------>product wait.... now ListSIze:2pool-1-thread-5------>product wait.... now ListSIze:2pool-1-thread-20------------------------------------>consume :Good-34534, now ListSIze:1pool-1-thread-20------------------------------------>consume :Good-34535, now ListSIze:0pool-1-thread-20------>consume wait....  now ListSIze:0pool-1-thread-21------>consume wait....  now ListSIze:0