用线程工厂创建线程

Posted 2020-10-15 塑料味的美年达

1.工厂模式/工厂

public class MyThreadFactory implements ThreadFactory {

    private int counter;//线程数量
    private String name;//线程名称
    private List<String> stats;//线程对象信息
    public MyThreadFactory(String name){
        counter=0;
        this.name=name;
        stats=new ArrayList<String>();
    }

    //实例化thread对象
    public Thread newThread(Runnable r) {
        Thread t = new Thread(r,name+"_thread_"+counter);
        counter++;
        //保存线程创建时的信息
        stats.add(String.format("created thread %d with name %s on %s\n",t.getId(),t.getName(),new Date()));
        return t;
    }

    //返回stats集合信息
    public String getStats(){
        StringBuffer buffer=new StringBuffer();
        Iterator<String> it=stats.iterator();
        while (it.hasNext()) {
            buffer.append(it.next());
            buffer.append("\n");
        }
        return buffer.toString();
    }

}

/**
 * 线程
 */
public class Task implements Runnable{
    Log log = LogFactory.getLog(this.getClass());
    public void run() {
        try {
            TimeUnit.SECONDS.sleep(1);
            log.debug("thread sleep is not error");
        } catch (InterruptedException e) {
            e.printStackTrace();
            log.debug("thread sleep is error in Task");
        }
    }
}

//调用

public class Main {
    public static void main(String[] args){
    //线程工厂
    MyThreadFactory factory = new MyThreadFactory("MyThreadFactory");
    //新线程
    Task task = new Task();

        Thread thread;
        System.out.println("Start the threads\n");
        for(int i=0;i<10;i++){
        thread=factory.newThread(task);
        thread.start();
            System.out.printf("Factory stats:\n"); System.out.printf("%s\n",factory.getStats());
        }
    }
}

//顺带说下日记

Log log = LogFactory.getLog(this.getClass());
log.dubug(");
这个是common.logging包下面的日志打印