Future结合ExecutorService的简单实例

Future结合ExecutorService的简单实例

//ValueObject类

public   class  AdEntity {
     private  String id;
     private  String name;
     private  String broker;
     private  String date;
     private  String body;
     // get/set
    
     public  String toString(){
         return   " 【编号为: " + id + " ,广告名称为: " + name + " ,代理商为: " + broker + " ,发布日期为: " + date + " ,内容为: " + body + " 】 " ;
    }
}

//调用任务类

public   class  AdTask  implements  Callable < AdEntity >  {
    @Override
     public  AdEntity call()  throws  Exception {
         //  模拟远程调用花费的一些时间
        Thread.sleep( 5 * 1000 );
        AdEntity vo = new  AdEntity();
        vo.setId(String.valueOf( new  Random().nextInt( 1000 )));
        vo.setName( " Ad@内衣广告 " );
        vo.setBroker( " CHANNEL " );
        Date date = new  Date();
        SimpleDateFormat sdf = new  SimpleDateFormat( " yyyy-MM-dd " );
        String dateStr = sdf.format(date);
        vo.setDate(dateStr);
        vo.setBody( " 远端内容 " );
         return  vo;
    }
}

//主函数

public   class  TestQueryMemg {
    
     /**
     *  @param  args
     *  @throws  ExecutionException 
     *  @throws  InterruptedException 
      */
     public   static   void  main(String[] args)  throws  InterruptedException, ExecutionException {
        ExecutorService exec = Executors.newCachedThreadPool();
         // 创建Future来完成网络调用任务
        Callable < AdEntity >  returnAd = new  AdTask();
        Future < AdEntity >  future = exec.submit(returnAd);
        
         // 开始执行本地化查询信息
        AdEntity localAd = new  AdEntity();
        localAd.setId(String.valueOf( new  Random().nextInt( 1000 )));
        localAd.setName( " Ad@食品广告 " );
        localAd.setBroker( " 蒙牛 " );
        SimpleDateFormat sdf = new  SimpleDateFormat( " yyyy-MM-dd " );
        String dateStr = sdf.format( new  Date());
        localAd.setDate(dateStr);
        localAd.setBody( " 内容本地 " );

        System.out.println( " 当前本地化查询内容为： " + localAd.toString());
        System.out.println( " 稍等片刻以获取远端信息 " );
        
         while ( ! future.isDone()){
             try  {
                Thread.sleep( 1 * 1000 );
            }  catch  (InterruptedException e) {
                e.printStackTrace();
            }
        }
        AdEntity entityRemote = (AdEntity)future.get();

        System.out.println( " 合并查询内容为：\n " + localAd.toString() + " \n " + entityRemote.toString());
    }
}