ThreadFactory的常见使用方法

概述

ThreadFactory是一种在软件开发过程中封装对象创建过程的面向对象的设计模式。常见的有如下两种使用场景：

异常捕获

ExecutorService executor = Executors.newSingleThreadExecutor(new LoggerThreadFactory ());
 
executor.submit(new Runnable() {
 @Override
 public void run() {
 someObject.methodThatThrowsRuntimeException();
 }
});

public class LoggerThreadFactory  implements ThreadFactory {
 
 @Override
 public Thread newThread(Runnable r) {
   Thread t = new Thread(r);
   t.setUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler(){
      @Override
      public void uncaughtException(Thread t, Throwable e) {
        LoggerFactory.getLogger(t.getName()).error(e.getMessage(), e);
      }
   });
 return t;
 }
}

代码debug

public WorkerThreadFactory implements ThreadFactory {
 
 private int counter = 0;
 private String prefix = "";
 
 public WorkerThreadFactory(String prefix) {
   this.prefix = prefix;
 }
 
 public Thread newThread(Runnable r) {
   return new Thread(r, prefix + "-" + count++);
 }
}

设置线程池中线程属性

public class DaemonThreadFactory implements ThreadFactory {
    public Thread newThread(Runnable r) {
       Thread t = new Thread(r);
       t.setDaemon(true);
       return t;
    }
}

public class MaxPriorityThreadFactory implements ThreadFactory {
    public Thread newThread(Runnable r) {
       Thread t = new Thread(r);
       t.setPriority(Thread.MAX_PRIORITY);
       return t;
    }
}