| /* |
| * 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.accumulo.core.util; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.concurrent.TimeUnit; |
| |
| import org.junit.Test; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Exercise basic timer (org.apache.hadoop.util.StopWatch) functionality. Current usage requires |
| * ability to reset timer. |
| */ |
| public class OpTimerTest { |
| |
| private static Logger log = LoggerFactory.getLogger(OpTimerTest.class); |
| |
| /** |
| * Validate reset functionality |
| */ |
| @Test |
| public void verifyReset() { |
| |
| OpTimer timer = new OpTimer().start(); |
| |
| try { |
| Thread.sleep(50); |
| } catch (InterruptedException ex) { |
| log.info("sleep sleep interrupted"); |
| Thread.currentThread().interrupt(); |
| } |
| |
| timer.stop(); |
| |
| long tValue = timer.now(); |
| |
| log.debug("Time value before reset {}", |
| String.format("%.3f ms", timer.scale(TimeUnit.MILLISECONDS))); |
| |
| timer.reset().start(); |
| |
| try { |
| Thread.sleep(1); |
| } catch (InterruptedException ex) { |
| log.info("sleep sleep interrupted"); |
| Thread.currentThread().interrupt(); |
| } |
| |
| timer.stop(); |
| |
| assertTrue(timer.now() > 0); |
| |
| assertTrue(tValue > timer.now()); |
| |
| timer.reset(); |
| |
| log.debug("Time value after reset {}", |
| String.format("%.3f ms", timer.scale(TimeUnit.MILLISECONDS))); |
| |
| assertEquals(0, timer.now()); |
| |
| } |
| |
| /** |
| * Verify that IllegalStateException is thrown when calling stop when timer has not been started. |
| */ |
| @Test(expected = IllegalStateException.class) |
| public void verifyExceptionCallingStopWhenNotStarted() { |
| |
| OpTimer timer = new OpTimer(); |
| |
| assertFalse(timer.isRunning()); |
| |
| // should throw exception - not running |
| timer.stop(); |
| } |
| |
| /** |
| * Verify that IllegalStateException is thrown when calling start on running timer. |
| */ |
| @Test(expected = IllegalStateException.class) |
| public void verifyExceptionCallingStartWhenRunning() { |
| |
| OpTimer timer = new OpTimer().start(); |
| |
| try { |
| Thread.sleep(50); |
| } catch (InterruptedException ex) { |
| log.info("sleep sleep interrupted"); |
| Thread.currentThread().interrupt(); |
| } |
| |
| assertTrue(timer.isRunning()); |
| |
| // should throw exception - already running |
| timer.start(); |
| } |
| |
| /** |
| * Verify that IllegalStateException is thrown when calling stop when not running. |
| */ |
| @Test(expected = IllegalStateException.class) |
| public void verifyExceptionCallingStopWhenNotRunning() { |
| |
| OpTimer timer = new OpTimer().start(); |
| |
| try { |
| Thread.sleep(50); |
| } catch (InterruptedException ex) { |
| log.info("sleep sleep interrupted"); |
| Thread.currentThread().interrupt(); |
| } |
| |
| assertTrue(timer.isRunning()); |
| |
| timer.stop(); |
| |
| assertFalse(timer.isRunning()); |
| |
| // should throw exception |
| timer.stop(); |
| } |
| |
| /** |
| * Validate that start / stop accumulates time. |
| */ |
| @Test |
| public void verifyElapsed() { |
| |
| OpTimer timer = new OpTimer().start(); |
| |
| try { |
| Thread.sleep(50); |
| } catch (InterruptedException ex) { |
| log.info("sleep sleep interrupted"); |
| Thread.currentThread().interrupt(); |
| } |
| |
| timer.stop(); |
| |
| long tValue = timer.now(); |
| |
| log.debug("Time value after first stop {}", |
| String.format("%.3f ms", timer.scale(TimeUnit.MILLISECONDS))); |
| |
| timer.start(); |
| |
| try { |
| Thread.sleep(10); |
| } catch (InterruptedException ex) { |
| log.info("sleep sleep interrupted"); |
| Thread.currentThread().interrupt(); |
| } |
| |
| timer.stop(); |
| |
| log.debug("Time value after second stop {}", |
| String.format("%.3f ms", timer.scale(TimeUnit.MILLISECONDS))); |
| |
| assertTrue(tValue < timer.now()); |
| |
| } |
| |
| /** |
| * Validate that scale returns correct values. |
| */ |
| @Test |
| public void scale() { |
| OpTimer timer = new OpTimer().start(); |
| |
| try { |
| Thread.sleep(50); |
| } catch (InterruptedException ex) { |
| log.info("sleep sleep interrupted"); |
| Thread.currentThread().interrupt(); |
| } |
| |
| timer.stop(); |
| |
| long tValue = timer.now(); |
| |
| assertEquals(tValue / 1000000.0, timer.scale(TimeUnit.MILLISECONDS), 0.00000001); |
| |
| assertEquals(tValue / 1000000000.0, timer.scale(TimeUnit.SECONDS), 0.00000001); |
| |
| } |
| } |