| /** |
| * 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.hbase.client; |
| |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.Set; |
| import java.util.TreeSet; |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.testclassification.ClientTests; |
| import org.apache.hadoop.hbase.testclassification.SmallTests; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| @Category({SmallTests.class, ClientTests.class}) |
| public class TestConnectionUtils { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestConnectionUtils.class); |
| |
| @Test |
| public void testRetryTimeJitter() { |
| long[] retries = new long[200]; |
| long baseTime = 1000000; //Larger number than reality to help test randomness. |
| long maxTimeExpected = (long) (baseTime * 1.01f); |
| for (int i = 0; i < retries.length; i++) { |
| retries[i] = ConnectionUtils.getPauseTime(baseTime, 0); |
| } |
| |
| Set<Long> retyTimeSet = new TreeSet<>(); |
| for (long l : retries) { |
| /*make sure that there is some jitter but only 1%*/ |
| assertTrue(l >= baseTime); |
| assertTrue(l <= maxTimeExpected); |
| // Add the long to the set |
| retyTimeSet.add(l); |
| } |
| |
| //Make sure that most are unique. some overlap will happen |
| assertTrue(retyTimeSet.size() > (retries.length * 0.80)); |
| } |
| |
| @Test |
| public void testGetPauseTime() { |
| long pauseTime; |
| long baseTime = 100; |
| pauseTime = ConnectionUtils.getPauseTime(baseTime, -1); |
| assertTrue(pauseTime >= (baseTime * HConstants.RETRY_BACKOFF[0])); |
| assertTrue(pauseTime <= (baseTime * HConstants.RETRY_BACKOFF[0] * 1.01f)); |
| |
| for (int i = 0; i < HConstants.RETRY_BACKOFF.length; i++) { |
| pauseTime = ConnectionUtils.getPauseTime(baseTime, i); |
| assertTrue(pauseTime >= (baseTime * HConstants.RETRY_BACKOFF[i])); |
| assertTrue(pauseTime <= (baseTime * HConstants.RETRY_BACKOFF[i] * 1.01f)); |
| } |
| |
| int length = HConstants.RETRY_BACKOFF.length; |
| pauseTime = ConnectionUtils.getPauseTime(baseTime, length); |
| assertTrue(pauseTime >= (baseTime * HConstants.RETRY_BACKOFF[length - 1])); |
| assertTrue(pauseTime <= (baseTime * HConstants.RETRY_BACKOFF[length - 1] * 1.01f)); |
| } |
| } |