package?com.ty.thread;

importjava.util.HashSet;importjava.util.Set;importjava.util.concurrent.BlockingQueue;importjava.util.concurrent.LinkedBlockingQueue;/***@authorTaoyong

* @date 2018年5月17日

* 天下沒有難敲的代碼！*/

public classThreadPoolExecutor {//維護線程的list

private Set threadList = new HashSet();/** 阻塞隊列是線程安全的，主要使用在生產/消費者的場景*/

private BlockingQueueblockingQueue;//線程池的工作線程數

private int poolSize = 0;//線程池的核心容量

private int coreSize = 0;private boolean shutDown = false;public ThreadPoolExecutor(intsize) {this.poolSize =size;

blockingQueue= new LinkedBlockingQueue<>(poolSize);

}public void execute(Task task) throwsInterruptedException {if(shutDown == true) {return;

}if(coreSize

blockingQueue.offer(task);

produceWorker(task);

}else{

blockingQueue.put(task);

}

}private void produceWorker(Task task) throwsInterruptedException {if(task == null) {throw new NullPointerException("非法參數：傳入的task對象為空！");

}if(shutDown == true) {return;

}

Thread thread= new Thread(newWorker());

threadList.add(thread);

coreSize++;

thread.start();

}public voidshutDown() {if(threadList == null || threadList.size() == 0) {return;

}

shutDown= true;for(Thread thread: threadList) {

System.out.println(thread.getName()+ " interrupt");

thread.interrupt();

}

}/** 此內部類是實際上的工作線?worker是實現了Runnable接口的實際工作線程，通過while(true)循環從BlockingQueue中取任務執行。

**/

class Worker implementsRunnable {

@Overridepublic voidrun() {while(true && shutDown == false) {try{

blockingQueue.take().doJob();

}catch(InterruptedException e) {

e.printStackTrace();

}

}

}

}

}

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