多線程解決耗時的調用

多線程處理耗時操作的demo。耗時操作包括DB查詢和請求接口。 

import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.FutureTask;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

import com.google.common.collect.Lists;
import com.google.common.util.concurrent.ThreadFactoryBuilder;


public class FutureTest {

    public static void main(String[] args) throws Exception{

        long time = System.currentTimeMillis();
        List<FutureTask<String>> futureTaskList = Lists.newArrayList();

        ThreadFactory namedThreadFactory = new ThreadFactoryBuilder()
            .setNameFormat("metrix-pool-%d").build();

        //通用線程池
        ExecutorService threadPool = new ThreadPoolExecutor(10, 20,
            0L, TimeUnit.MILLISECONDS,
            new LinkedBlockingQueue(1024), namedThreadFactory, new ThreadPoolExecutor.AbortPolicy());
        for (int i = 0; i < 100; i++) {

            FutureTask<String> futureTask = new FutureTask(new Callable() {
                @Override
                public Object call() throws Exception {
                    return runTest();
                }
            });
            threadPool.execute(futureTask);
            futureTaskList.add(futureTask);
          

        }

        futureTaskList.forEach(s->{
            try {

                System.out.println(s.get(10,TimeUnit.SECONDS));
            }catch (Exception e) {

            }
        });
        System.out.println(System.currentTimeMillis() - time);
    }


    private static String runTest() throws Exception {
        Thread.sleep(50);
        return "ok";
    }
}