| /** |
| * 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.hdfs.server.namenode; |
| |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| import static org.mockito.Mockito.mock; |
| import static org.mockito.Mockito.when; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| |
| import org.junit.Test; |
| |
| import org.slf4j.LoggerFactory; |
| import org.apache.hadoop.test.GenericTestUtils.LogCapturer; |
| |
| public class TestNameNodeResourcePolicy { |
| |
| @Test |
| public void testExcessiveMinimumRedundantResources() { |
| LogCapturer logCapturer = |
| LogCapturer.captureLogs(LoggerFactory.getLogger(NameNodeResourcePolicy.class)); |
| assertFalse(testResourceScenario(1, 0, 0, 0, 2)); |
| logCapturer.stopCapturing(); |
| assertTrue(logCapturer.getOutput().contains("Resources not available.")); |
| } |
| |
| @Test |
| public void testSingleRedundantResource() { |
| assertTrue(testResourceScenario(1, 0, 0, 0, 1)); |
| assertFalse(testResourceScenario(1, 0, 1, 0, 1)); |
| } |
| |
| @Test |
| public void testSingleRequiredResource() { |
| assertTrue(testResourceScenario(0, 1, 0, 0, 0)); |
| assertFalse(testResourceScenario(0, 1, 0, 1, 0)); |
| } |
| |
| @Test |
| public void testMultipleRedundantResources() { |
| assertTrue(testResourceScenario(4, 0, 0, 0, 4)); |
| assertFalse(testResourceScenario(4, 0, 1, 0, 4)); |
| assertTrue(testResourceScenario(4, 0, 1, 0, 3)); |
| assertFalse(testResourceScenario(4, 0, 2, 0, 3)); |
| assertTrue(testResourceScenario(4, 0, 2, 0, 2)); |
| assertFalse(testResourceScenario(4, 0, 3, 0, 2)); |
| assertTrue(testResourceScenario(4, 0, 3, 0, 1)); |
| assertFalse(testResourceScenario(4, 0, 4, 0, 1)); |
| assertFalse(testResourceScenario(1, 0, 0, 0, 2)); |
| } |
| |
| @Test |
| public void testMultipleRequiredResources() { |
| assertTrue(testResourceScenario(0, 3, 0, 0, 0)); |
| assertFalse(testResourceScenario(0, 3, 0, 1, 0)); |
| assertFalse(testResourceScenario(0, 3, 0, 2, 0)); |
| assertFalse(testResourceScenario(0, 3, 0, 3, 0)); |
| } |
| |
| @Test |
| public void testRedundantWithRequiredResources() { |
| assertTrue(testResourceScenario(2, 2, 0, 0, 1)); |
| assertTrue(testResourceScenario(2, 2, 1, 0, 1)); |
| assertFalse(testResourceScenario(2, 2, 2, 0, 1)); |
| assertFalse(testResourceScenario(2, 2, 0, 1, 1)); |
| assertFalse(testResourceScenario(2, 2, 1, 1, 1)); |
| assertFalse(testResourceScenario(2, 2, 2, 1, 1)); |
| } |
| |
| private static boolean testResourceScenario( |
| int numRedundantResources, |
| int numRequiredResources, |
| int numFailedRedundantResources, |
| int numFailedRequiredResources, |
| int minimumRedundantResources) { |
| |
| Collection<CheckableNameNodeResource> resources = |
| new ArrayList<CheckableNameNodeResource>(); |
| |
| for (int i = 0; i < numRedundantResources; i++) { |
| CheckableNameNodeResource r = mock(CheckableNameNodeResource.class); |
| when(r.isRequired()).thenReturn(false); |
| when(r.isResourceAvailable()).thenReturn(i >= numFailedRedundantResources); |
| resources.add(r); |
| } |
| |
| for (int i = 0; i < numRequiredResources; i++) { |
| CheckableNameNodeResource r = mock(CheckableNameNodeResource.class); |
| when(r.isRequired()).thenReturn(true); |
| when(r.isResourceAvailable()).thenReturn(i >= numFailedRequiredResources); |
| resources.add(r); |
| } |
| |
| return NameNodeResourcePolicy.areResourcesAvailable(resources, |
| minimumRedundantResources); |
| } |
| } |