| /* |
| * 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. |
| */ |
| |
| package org.apache.ignite.lang; |
| |
| /** |
| * |
| */ |
| public class GridSystemCurrentTimeMillisTest { |
| /** */ |
| private static long time; |
| |
| /** |
| * |
| */ |
| private GridSystemCurrentTimeMillisTest() { |
| // No-op. |
| } |
| |
| /** |
| * @param args Args. |
| */ |
| public static void main(String[] args) { |
| new Thread(new Timer()).start(); |
| |
| new Thread(new Client()).start(); |
| new Thread(new Client()).start(); |
| new Thread(new Client()).start(); |
| new Thread(new Client()).start(); |
| } |
| |
| /** |
| * |
| */ |
| private static class Timer implements Runnable { |
| @SuppressWarnings({"BusyWait", "InfiniteLoopStatement"}) |
| @Override public void run() { |
| while (true) { |
| time = System.currentTimeMillis(); |
| |
| try { |
| Thread.sleep(10); |
| } |
| catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| } |
| } |
| |
| /** |
| * |
| */ |
| private static class Client implements Runnable { |
| @SuppressWarnings({"BusyWait", "InfiniteLoopStatement"}) |
| @Override public void run() { |
| int readsCnt = 0; |
| |
| int staleReadsCnt = 0; |
| |
| long lastVal = -1; |
| |
| while (true) { |
| try { |
| Thread.sleep(15); |
| } |
| catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| |
| readsCnt++; |
| |
| long time0 = time; |
| |
| if (lastVal == time0) |
| staleReadsCnt++; |
| |
| lastVal = time0; |
| |
| if (readsCnt % 500 == 0) |
| System.out.println("Stats [thread=" + Thread.currentThread().getId() + ", reads=" + readsCnt + |
| ", staleReadsCnt=" + staleReadsCnt + ']'); |
| |
| try { |
| Thread.sleep(40); |
| } |
| catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| } |
| } |
| } |