Java中使用LinkedBlockingQueue实现生产者,消费者模式

Java中使用LinkedBlockingQueue实现生产者,消费者模式

LinkedBlockingQueue实现是线程安全的，实现了FIFO（先进先出）等特性. 是作为生产者消费者的首选，LinkedBlockingQueue 可以指定容量，也可以不指定，不指定的话，默认最大是Integer.MAX_VALUE，其中主要用到put和take方法，put方法在队列满的时候会阻塞直到有队列成员被消费，take方法在队列空的时候会阻塞，直到有队列成员被放进来。

书本上的话不再重复, 还是看看实例代码.

工厂生产制造  生产高大上洒, 还有美女.

消费者有X二代,也有导演.

让消费者抢资源吧.

生产者实现

package cn.hpc.producerConsumer;

import java.util.UUID;
import java.util.concurrent.BlockingQueue;

public class Producer implements Runnable {
    private BlockingQueue<String> queue;
    private String produce;
    public Producer(BlockingQueue<String> queue, String produce) {
        this.queue = queue;
        if (null != produce)
         this.produce = produce;
        else this.produce = "null ";
    }

    @Override
    public void run() {
        String uuid = UUID.randomUUID().toString();
        try {
         Thread.sleep(200);//生产需要时间
            queue.put(produce + " : " + uuid);
            System.out.println("Produce \"" + produce + "\" : " + uuid + " " + Thread.currentThread());
           
        } catch (InterruptedException e) {
            System.out.println(e.getMessage());
        }
    }
}     

消费者

package cn.hpc.producerConsumer;

import java.util.concurrent.BlockingQueue;

public class Consumer implements Runnable {
 private BlockingQueue<String> queue;
 private String consumer;

 public Consumer(BlockingQueue<String> queue, String consumer) {
  this.queue = queue;
  if (null != consumer)
   this.consumer = consumer;
  else
   this.consumer = "null ";
 }

 @Override
 public void run() {
  try {
   String uuid = queue.take();
   System.out.println(consumer + " decayed " + uuid
     + " " + Thread.currentThread());
  } catch (InterruptedException e) {
   System.out.println(e.getMessage());
  }
 }
}

调用 :  new Tester();

做

package cn.hpc.producerConsumer;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingQueue;

public class Tester {

    public Tester(){
        // 队列
        LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<String>(10);

       
        ExecutorService service = Executors.newCachedThreadPool();
        for (int i = 0; i < 6; i++) {
         service.submit(new Consumer(queue, "X二代" + i));
         service.submit(new Consumer(queue, "导演" + i));
        }
        for (int i = 0; i < 6; i++) {
         service.submit(new Producer(queue, "黄金酒," + i));
         service.submit(new Producer(queue, "美女演员" + i));
        }
        service.shutdown();
    }
}   

看看输出日志

12-26 12:13:07.689: I/System.out(19372): Produce "黄金酒0" : 67cbb3c8-b72b-4bd5-9edc-f1c3314e9f50 Thread[pool-1-thread-13,5,main]
12-26 12:13:07.699: I/System.out(19372): 导演4 decayed 美女演员4 : 73e6939e-287e-4dda-88ff-2a59871f8a41 Thread[pool-1-thread-10,5,main]
12-26 12:13:07.699: I/System.out(19372): Produce "黄金酒1" : 21f150e3-7909-47c3-a5b1-31b4f4242446 Thread[pool-1-thread-15,5,main]
12-26 12:13:07.699: I/System.out(19372): X二代5 decayed 黄金酒5 : 66d5449b-ad38-41fe-8012-224b0f996697 Thread[pool-1-thread-11,5,main]
12-26 12:13:07.699: I/System.out(19372): Produce "黄金酒5" : 66d5449b-ad38-41fe-8012-224b0f996697 Thread[pool-1-thread-23,5,main]
12-26 12:13:07.699: I/System.out(19372): 导演5 decayed 美女演员5 : d6008dee-c42f-4c09-8856-ae38ac64e104 Thread[pool-1-thread-12,5,main]
12-26 12:13:07.699: I/System.out(19372): Produce "美女演员1" : 9786647d-c499-40be-9905-da767ae2fe88 Thread[pool-1-thread-16,5,main]
12-26 12:13:07.699: I/System.out(19372): Produce "美女演员3" : 72fcbcec-c903-4310-886a-40e31c693248 Thread[pool-1-thread-20,5,main]
12-26 12:13:07.699: I/System.out(19372): X二代2 decayed 黄金酒2 : 75f1952c-975d-41b1-ba69-9e24006031cd Thread[pool-1-thread-5,5,main]
12-26 12:13:07.699: I/System.out(19372): 导演2 decayed 美女演员2 : adb8b376-83c4-487b-9af1-11c16d060ee4 Thread[pool-1-thread-6,5,main]
12-26 12:13:07.699: I/System.out(19372): 导演3 decayed 美女演员3 : 72fcbcec-c903-4310-886a-40e31c693248 Thread[pool-1-thread-8,5,main]
12-26 12:13:07.699: I/System.out(19372): Produce "黄金酒2" : 75f1952c-975d-41b1-ba69-9e24006031cd Thread[pool-1-thread-17,5,main]
12-26 12:13:07.699: I/System.out(19372): Produce "美女演员0" : aad2007e-6322-43bc-a1f3-ade9af671e7b Thread[pool-1-thread-14,5,main]
12-26 12:13:07.699: I/System.out(19372): X二代0 decayed 黄金酒0 : 67cbb3c8-b72b-4bd5-9edc-f1c3314e9f50 Thread[pool-1-thread-1,5,main]
12-26 12:13:07.699: I/System.out(19372): 导演0 decayed 美女演员0 : aad2007e-6322-43bc-a1f3-ade9af671e7b Thread[pool-1-thread-2,5,main]
12-26 12:13:07.699: I/System.out(19372): X二代1 decayed 黄金酒1 : 21f150e3-7909-47c3-a5b1-31b4f4242446 Thread[pool-1-thread-3,5,main]
12-26 12:13:07.699: I/System.out(19372): 导演1 decayed 美女演员1 : 9786647d-c499-40be-9905-da767ae2fe88 Thread[pool-1-thread-4,5,main]
12-26 12:13:07.699: I/System.out(19372): Produce "黄金酒3" : c0ff371e-473d-4af0-90a7-620fa67c22d8 Thread[pool-1-thread-19,5,main]
12-26 12:13:07.699: I/System.out(19372): Produce "美女演员5" : d6008dee-c42f-4c09-8856-ae38ac64e104 Thread[pool-1-thread-24,5,main]
12-26 12:13:07.699: I/System.out(19372): Produce "黄金酒4" : 272cb2a6-b1dd-44d8-8254-df4f6be59bd2 Thread[pool-1-thread-21,5,main]
12-26 12:13:07.699: I/System.out(19372): Produce "美女演员2" : adb8b376-83c4-487b-9af1-11c16d060ee4 Thread[pool-1-thread-18,5,main]
12-26 12:13:07.699: I/System.out(19372): Produce "美女演员4" : 73e6939e-287e-4dda-88ff-2a59871f8a41 Thread[pool-1-thread-22,5,main]
12-26 12:13:07.699: I/System.out(19372): X二代3 decayed 黄金酒3 : c0ff371e-473d-4af0-90a7-620fa67c22d8 Thread[pool-1-thread-7,5,main]
12-26 12:13:07.699: I/System.out(19372): X二代4 decayed 黄金酒4 : 272cb2a6-b1dd-44d8-8254-df4f6be59bd2 Thread[pool-1-thread-9,5,main]