| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.hdds.utils; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import org.apache.hadoop.hdds.HddsIdFactory; |
| import org.junit.After; |
| import static org.junit.Assert.assertEquals; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| /** |
| * Test the JMX interface for the rocksdb metastore implementation. |
| */ |
| public class TestHddsIdFactory { |
| |
| private static final Set<Long> ID_SET = ConcurrentHashMap.newKeySet(); |
| private static final int IDS_PER_THREAD = 10000; |
| private static final int NUM_OF_THREADS = 5; |
| |
| @After |
| public void cleanup() { |
| ID_SET.clear(); |
| } |
| |
| @Test |
| public void testGetLongId() throws Exception { |
| |
| ExecutorService executor = Executors.newFixedThreadPool(5); |
| List<Callable<Integer>> tasks = new ArrayList<>(5); |
| addTasks(tasks); |
| List<Future<Integer>> result = executor.invokeAll(tasks); |
| assertEquals(IDS_PER_THREAD * NUM_OF_THREADS, ID_SET.size()); |
| for (Future<Integer> r : result) { |
| assertEquals(IDS_PER_THREAD, r.get().intValue()); |
| } |
| } |
| |
| private void addTasks(List<Callable<Integer>> tasks) { |
| for (int i = 0; i < NUM_OF_THREADS; i++) { |
| Callable<Integer> task = () -> { |
| for (int idNum = 0; idNum < IDS_PER_THREAD; idNum++) { |
| long var = HddsIdFactory.getLongId(); |
| if (ID_SET.contains(var)) { |
| Assert.fail("Duplicate id found"); |
| } |
| ID_SET.add(var); |
| } |
| return IDS_PER_THREAD; |
| }; |
| tasks.add(task); |
| } |
| } |
| } |