package test; import java.util.Random; public class Main { public static void main(String[] args) { System.out.println("我的机器可用Processor数量:" + Runtime.getRuntime().availableProcessors()); Master master = new Master(new MyWorker(), Runtime.getRuntime().availableProcessors()); Random r = new Random(); for(int i = 1; i<= 100; i++){ Task t = new Task(); t.setId(i); t.setName("任务"+i); t.setPrice(r.nextInt(1000)); master.submit(t); } master.execute(); long start = System.currentTimeMillis(); while(true){ if(master.isComplete()){ long end = System.currentTimeMillis() - start; int ret = master.getResult(); System.out.println("最终结果:" + ret + ", 执行耗时:" + end); break; } } } }
package test; import java.util.HashMap; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentLinkedQueue; public class Master { //1 应该有一个承装任务的集合 private ConcurrentLinkedQueue<Task> workQueue = new ConcurrentLinkedQueue<Task>(); //2 使用HashMap去承装所有的worker对象 private HashMap<String, Thread> workers = new HashMap<String, Thread>(); //3 使用一个容器承装每一个worker并非执行任务的结果集 private ConcurrentHashMap<String, Object> resultMap = new ConcurrentHashMap<String, Object>(); //4 构造方法 public Master(Worker worker, int workerCount){ // 每一个worker对象都需要有Master的引用 workQueue用于任务的领取,resultMap用于任务的提交 worker.setWorkerQueue(this.workQueue); worker.setResultMap(this.resultMap); for(int i = 0 ; i < workerCount; i++){ //key表示每一个worker的名字, value表示线程执行对象 workers.put("子节点" + Integer.toString(i), new Thread(worker)); } } //5 提交方法 public void submit(Task task){ this.workQueue.add(task); } //6 需要有一个执行的方法(启动应用程序 让所有的worker工作) public void execute(){ for(Map.Entry<String, Thread> me : workers.entrySet()){ me.getValue().start(); } } //8 判断线程是否执行完毕 public boolean isComplete() { for(Map.Entry<String, Thread> me : workers.entrySet()){ if(me.getValue().getState() != Thread.State.TERMINATED){ return false; } } return true; } //9 返回结果集数据 public int getResult() { int ret = 0; for(Map.Entry<String, Object> me : resultMap.entrySet()){ //汇总的逻辑.. ret += Integer.parseInt((String)me.getValue()); } return ret; } }
package test; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentLinkedQueue; public class Worker implements Runnable { private ConcurrentLinkedQueue<Task> workQueue; private ConcurrentHashMap<String, Object> resultMap; public void setWorkerQueue(ConcurrentLinkedQueue<Task> workQueue) { this.workQueue = workQueue; } public void setResultMap(ConcurrentHashMap<String, Object> resultMap) { this.resultMap = resultMap; } @Override public void run() { while(true){ Task input = this.workQueue.poll(); if(input == null) break; //真正的去做业务处理 Object output = MyWorker.handle(input); this.resultMap.put(Integer.toString(input.getId()), output); } } public static Object handle(Task input) { return null; } }
package test; public class Task { private int id ; private String name; private int price; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getPrice() { return price; } public void setPrice(int price) { this.price = price; } }
package test; public class MyWorker extends Worker { public static Object handle(Task input) { Object output = null; try { //表示处理task任务的耗时,可能是数据的加工,也可能是操作数据库... Thread.sleep(500); output = input.getPrice(); } catch (InterruptedException e) { e.printStackTrace(); } return output; } }