| /** |
| * 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.mapred; |
| |
| import junit.framework.TestCase; |
| import java.io.IOException; |
| import java.text.ParseException; |
| |
| import org.apache.hadoop.mapreduce.TaskCounter; |
| |
| /** |
| * TestCounters checks the sanity and recoverability of {@code Counters} |
| */ |
| public class TestCounters extends TestCase { |
| enum myCounters {TEST1, TEST2}; |
| private static final long MAX_VALUE = 10; |
| |
| // Generates enum based counters |
| private Counters getEnumCounters(Enum[] keys) { |
| Counters counters = new Counters(); |
| for (Enum key : keys) { |
| for (long i = 0; i < MAX_VALUE; ++i) { |
| counters.incrCounter(key, i); |
| } |
| } |
| return counters; |
| } |
| |
| // Generate string based counters |
| private Counters getEnumCounters(String[] gNames, String[] cNames) { |
| Counters counters = new Counters(); |
| for (String gName : gNames) { |
| for (String cName : cNames) { |
| for (long i = 0; i < MAX_VALUE; ++i) { |
| counters.incrCounter(gName, cName, i); |
| } |
| } |
| } |
| return counters; |
| } |
| |
| /** |
| * Test counter recovery |
| */ |
| private void testCounter(Counters counter) throws ParseException { |
| String compactEscapedString = counter.makeEscapedCompactString(); |
| |
| Counters recoveredCounter = |
| Counters.fromEscapedCompactString(compactEscapedString); |
| // Check for recovery from string |
| assertEquals("Recovered counter does not match on content", |
| counter, recoveredCounter); |
| assertEquals("recovered counter has wrong hash code", |
| counter.hashCode(), recoveredCounter.hashCode()); |
| } |
| |
| public void testCounters() throws IOException { |
| Enum[] keysWithResource = {TaskCounter.MAP_INPUT_RECORDS, |
| TaskCounter.MAP_OUTPUT_BYTES}; |
| |
| Enum[] keysWithoutResource = {myCounters.TEST1, myCounters.TEST2}; |
| |
| String[] groups = {"group1", "group2", "group{}()[]"}; |
| String[] counters = {"counter1", "counter2", "counter{}()[]"}; |
| |
| try { |
| // I. Check enum counters that have resource bundler |
| testCounter(getEnumCounters(keysWithResource)); |
| |
| // II. Check enum counters that dont have resource bundler |
| testCounter(getEnumCounters(keysWithoutResource)); |
| |
| // III. Check string counters |
| testCounter(getEnumCounters(groups, counters)); |
| } catch (ParseException pe) { |
| throw new IOException(pe); |
| } |
| } |
| |
| public static void main(String[] args) throws IOException { |
| new TestCounters().testCounters(); |
| } |
| } |