package org.apache.helix.filestore;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.atomic.AtomicReference;

public class Test {
  public static void main(String[] args) throws InterruptedException {
    while (true) {
      ExecutorService service = Executors.newFixedThreadPool(400);
      List<Callable<Object>> list = new ArrayList<Callable<Object>>();
      for (int i = 0; i < 256; i++) {
        MyRunnable runnable = new MyRunnable();
        list.add(runnable);
        new Thread(runnable).start();
        // service.submit(runnable);
      }

      // List<Future<Object>> invokeAll = service.invokeAll(list);
      // service.shutdownNow();
      System.out.println("RUN -------------");
      Thread.sleep(5000);
    }
  }
}

class MyRunnable implements Callable<Object>, Runnable {

  // AtomicReference<Object> ref = new AtomicReference<Object>(new Object());
  class Ref {
    Object obj;

    public Ref(Object obj) {
      this.obj = obj;
    }

    void set(Object obj) {
      this.obj = obj;
    }

    Object get() {
      return obj;
    }
  }

  Ref ref = new Ref(new Object());
  Object lock = new Object();

  // @Override
  public Object call1() throws Exception {
    long start = System.currentTimeMillis();
    System.out.println(start);
    synchronized (lock) {

      if (ref.get() != null) {
        try {
          int sum = 0;
          List<Float> array = new ArrayList<Float>();
          for (int i = 0; i < 5000; i++) {
            array.add((float) Math.random());
          }
          Collections.sort(array);
        } catch (Exception e) {
          e.printStackTrace();
        }
        ref.set(null);
      }
    }
    long end = System.currentTimeMillis();
    System.out.println("time:" + (end - start));
    return new Object();

  }

  @Override
  public Object call() throws Exception {
    long start = System.currentTimeMillis();
    System.out.println(start);
    try {
      // int sum = 0;
      // List<Float> array = new ArrayList<Float>();
      // for (int i = 0; i < 5000; i++)
      // {
      // array.add((float) Math.random());
      // }
      // Collections.sort(array);
    } catch (Exception e) {
      e.printStackTrace();
    }
    ref.set(null);
    long end = System.currentTimeMillis();
    System.out.println("time:" + (end - start));
    return new Object();

  }

  @Override
  public void run() {
    long start = System.currentTimeMillis();
    System.out.println(start);
    try {
      int sum = 0;
      List<Float> array = new ArrayList<Float>();
      for (int i = 0; i < 5000; i++) {
        array.add((float) Math.random());
      }
      Collections.sort(array);
    } catch (Exception e) {
      e.printStackTrace();
    }
    ref.set(null);
    long end = System.currentTimeMillis();
    System.out.println("time:" + (end - start));
  }
}
