| /** |
| * 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 java.io.File; |
| import java.io.IOException; |
| import java.util.List; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.junit.Test; |
| import static org.junit.Assert.*; |
| |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.mapreduce.server.tasktracker.TTConfig; |
| |
| public class TestTaskTrackerInstrumentation { |
| private static final Log LOG = LogFactory.getLog( |
| TestTaskTrackerInstrumentation.class); |
| |
| @Test |
| public void testCreateInstrumentationWithSingleClass() { |
| // Check that if only a single instrumentation class is given, |
| // that class is used directly |
| JobConf conf = new JobConf(); |
| conf.set(TTConfig.TT_INSTRUMENTATION, |
| DummyTaskTrackerInstrumentation.class.getName()); |
| TaskTracker tracker = new TaskTracker(); |
| TaskTrackerInstrumentation inst = |
| TaskTracker.createInstrumentation(tracker, conf); |
| assertEquals(DummyTaskTrackerInstrumentation.class.getName(), |
| inst.getClass().getName()); |
| } |
| |
| @Test |
| public void testCreateInstrumentationWithMultipleClasses() { |
| // Set up configuration to create two dummy instrumentation objects |
| JobConf conf = new JobConf(); |
| String dummyClass = DummyTaskTrackerInstrumentation.class.getName(); |
| String classList = dummyClass + "," + dummyClass; |
| conf.set(TTConfig.TT_INSTRUMENTATION, classList); |
| TaskTracker tracker = new TaskTracker(); |
| |
| // Check that a composite instrumentation object is created |
| TaskTrackerInstrumentation inst = |
| TaskTracker.createInstrumentation(tracker, conf); |
| assertEquals(CompositeTaskTrackerInstrumentation.class.getName(), |
| inst.getClass().getName()); |
| |
| // Check that each member of the composite is a dummy instrumentation |
| CompositeTaskTrackerInstrumentation comp = |
| (CompositeTaskTrackerInstrumentation) inst; |
| List<TaskTrackerInstrumentation> insts = comp.getInstrumentations(); |
| assertEquals(2, insts.size()); |
| assertEquals(DummyTaskTrackerInstrumentation.class.getName(), |
| insts.get(0).getClass().getName()); |
| assertEquals(DummyTaskTrackerInstrumentation.class.getName(), |
| insts.get(1).getClass().getName()); |
| } |
| |
| @Test |
| public void testCreateInstrumentationWithDefaultClass() { |
| // Check that if no instrumentation class is given, the default |
| // class (TaskTrackerMetricsInst) is used. |
| JobConf conf = new JobConf(); |
| TaskTracker tracker = new TaskTracker(); |
| tracker.setConf(conf); // Needed to avoid NullPointerExcepton in |
| // TaskTrackerMetricsInst constructor |
| TaskTrackerInstrumentation inst = |
| TaskTracker.createInstrumentation(tracker, conf); |
| assertEquals(TaskTrackerMetricsInst.class.getName(), |
| inst.getClass().getName()); |
| } |
| |
| @Test |
| public void testCreateInstrumentationWithEmptyParam() { |
| // Check that if an empty string is given, the default instrumentation |
| // class (TaskTrackerMetricsInst) is used. An error message should also |
| // be written to the log, but we do not capture that. |
| JobConf conf = new JobConf(); |
| conf.set(TTConfig.TT_INSTRUMENTATION, ""); |
| TaskTracker tracker = new TaskTracker(); |
| tracker.setConf(conf); // Needed to avoid NullPointerExcepton in |
| // TaskTrackerMetricsInst constructor |
| TaskTrackerInstrumentation inst = |
| TaskTracker.createInstrumentation(tracker, conf); |
| assertEquals(TaskTrackerMetricsInst.class.getName(), |
| inst.getClass().getName()); |
| } |
| |
| @Test |
| public void testCreateInstrumentationWithInvalidParam() { |
| // Check that if an invalid class list is given, the default |
| // instrumentation class (TaskTrackerMetricsInst) is used. An error |
| // should also be written to the log, but we do not capture that. |
| JobConf conf = new JobConf(); |
| conf.set(TTConfig.TT_INSTRUMENTATION, "XYZ,ZZY"); |
| TaskTracker tracker = new TaskTracker(); |
| tracker.setConf(conf); // Needed to avoid NullPointerExcepton in |
| // TaskTrackerMetricsInst constructor |
| TaskTrackerInstrumentation inst = |
| TaskTracker.createInstrumentation(tracker, conf); |
| assertEquals(TaskTrackerMetricsInst.class.getName(), |
| inst.getClass().getName()); |
| } |
| } |