| /** |
| * 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.hadoop.mapreduce; |
| |
| import java.util.Random; |
| |
| import org.junit.Test; |
| import static org.junit.Assert.*; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.mapreduce.counters.LimitExceededException; |
| import org.apache.hadoop.mapreduce.counters.Limits; |
| |
| /** |
| * TestCounters checks the sanity and recoverability of {@code Counters} |
| */ |
| public class TestCounters { |
| |
| static final Log LOG = LogFactory.getLog(TestCounters.class); |
| |
| /** |
| * Verify counter value works |
| */ |
| @Test |
| public void testCounterValue() { |
| final int NUMBER_TESTS = 100; |
| final int NUMBER_INC = 10; |
| final Random rand = new Random(); |
| for (int i = 0; i < NUMBER_TESTS; i++) { |
| long initValue = rand.nextInt(); |
| long expectedValue = initValue; |
| Counter counter = new Counters().findCounter("test", "foo"); |
| counter.setValue(initValue); |
| assertEquals("Counter value is not initialized correctly", |
| expectedValue, counter.getValue()); |
| for (int j = 0; j < NUMBER_INC; j++) { |
| int incValue = rand.nextInt(); |
| counter.increment(incValue); |
| expectedValue += incValue; |
| assertEquals("Counter value is not incremented correctly", |
| expectedValue, counter.getValue()); |
| } |
| expectedValue = rand.nextInt(); |
| counter.setValue(expectedValue); |
| assertEquals("Counter value is not set correctly", |
| expectedValue, counter.getValue()); |
| } |
| } |
| |
| @Test public void testLimits() { |
| for (int i = 0; i < 3; ++i) { |
| // make sure limits apply to separate containers |
| testMaxCounters(new Counters()); |
| testMaxGroups(new Counters()); |
| } |
| } |
| |
| @Test |
| public void testCountersIncrement() { |
| Counters fCounters = new Counters(); |
| Counter fCounter = fCounters.findCounter(FRAMEWORK_COUNTER); |
| fCounter.setValue(100); |
| Counter gCounter = fCounters.findCounter("test", "foo"); |
| gCounter.setValue(200); |
| |
| Counters counters = new Counters(); |
| counters.incrAllCounters(fCounters); |
| Counter counter; |
| for (CounterGroup cg : fCounters) { |
| CounterGroup group = counters.getGroup(cg.getName()); |
| if (group.getName().equals("test")) { |
| counter = counters.findCounter("test", "foo"); |
| assertEquals(200, counter.getValue()); |
| } else { |
| counter = counters.findCounter(FRAMEWORK_COUNTER); |
| assertEquals(100, counter.getValue()); |
| } |
| } |
| } |
| |
| static final Enum<?> FRAMEWORK_COUNTER = TaskCounter.CPU_MILLISECONDS; |
| static final long FRAMEWORK_COUNTER_VALUE = 8; |
| static final String FS_SCHEME = "HDFS"; |
| static final FileSystemCounter FS_COUNTER = FileSystemCounter.BYTES_READ; |
| static final long FS_COUNTER_VALUE = 10; |
| |
| private void testMaxCounters(final Counters counters) { |
| LOG.info("counters max="+ Limits.COUNTERS_MAX); |
| for (int i = 0; i < Limits.COUNTERS_MAX; ++i) { |
| counters.findCounter("test", "test"+ i); |
| } |
| setExpected(counters); |
| shouldThrow(LimitExceededException.class, new Runnable() { |
| public void run() { |
| counters.findCounter("test", "bad"); |
| } |
| }); |
| checkExpected(counters); |
| } |
| |
| private void testMaxGroups(final Counters counters) { |
| LOG.info("counter groups max="+ Limits.GROUPS_MAX); |
| for (int i = 0; i < Limits.GROUPS_MAX; ++i) { |
| // assuming COUNTERS_MAX > GROUPS_MAX |
| counters.findCounter("test"+ i, "test"); |
| } |
| setExpected(counters); |
| shouldThrow(LimitExceededException.class, new Runnable() { |
| public void run() { |
| counters.findCounter("bad", "test"); |
| } |
| }); |
| checkExpected(counters); |
| } |
| |
| private void setExpected(Counters counters) { |
| counters.findCounter(FRAMEWORK_COUNTER).setValue(FRAMEWORK_COUNTER_VALUE); |
| counters.findCounter(FS_SCHEME, FS_COUNTER).setValue(FS_COUNTER_VALUE); |
| } |
| |
| private void checkExpected(Counters counters) { |
| assertEquals(FRAMEWORK_COUNTER_VALUE, |
| counters.findCounter(FRAMEWORK_COUNTER).getValue()); |
| assertEquals(FS_COUNTER_VALUE, |
| counters.findCounter(FS_SCHEME, FS_COUNTER).getValue()); |
| } |
| |
| private void shouldThrow(Class<? extends Exception> ecls, Runnable runnable) { |
| try { |
| runnable.run(); |
| } catch (Exception e) { |
| assertSame(ecls, e.getClass()); |
| LOG.info("got expected: "+ e); |
| return; |
| } |
| assertTrue("Should've thrown "+ ecls.getSimpleName(), false); |
| } |
| } |