银行排队的简单实现

这段时间在看Java并发编程方面的东西，注意到“生产者-消费者”模式，去某公司笔试的时候也遇到了这样的题，今天顺便把他用程序的方式写了下来。

UML就免了，不想画！顺便吐槽一下，小组开发，一定得用UML吗？随便画点图不行么？）

先上ServiceManager，它相当于大厅里的排号机，客户自己去排号，然后柜台的服务人员会去自动的取号：

/**
*
*/
package com.fcm.thread.banksample;

import java.util.concurrent.BlockingQueue;
import java.util.concurrent.PriorityBlockingQueue;

/**
* @author fenggcai
*
*/
public class ServiceManager {

/**
* @param args
*/
public static  void main(String[] args) {
//only 50 customers could be served a time
final BlockingQueue> customerQueue = new PriorityBlockingQueue>(
50);

for (int i =  0; i < 52; i++) {
int randomLevel = new Double(Math.random() * 5).intValue();
Customer c = new Customer("Customer" + i,
CustomerLevel.values()[randomLevel]);

new Thread(new CustomerService(customerQueue, c)).start();

}

for (int i =  0; i < 5; i++) {
BankService bs = new BankService(customerQueue);
new Thread(bs).start();
try {
Thread.currentThread().sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}
}