001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.util;
019
020import static org.junit.Assert.assertEquals;
021
022import java.util.ArrayList;
023import java.util.List;
024import java.util.Random;
025import java.util.concurrent.ExecutionException;
026import java.util.concurrent.ThreadLocalRandom;
027import org.apache.hadoop.hbase.HBaseClassTestRule;
028import org.apache.hadoop.hbase.testclassification.MiscTests;
029import org.apache.hadoop.hbase.testclassification.SmallTests;
030import org.apache.hadoop.hbase.util.PoolMap.PoolType;
031import org.junit.ClassRule;
032import org.junit.Test;
033import org.junit.experimental.categories.Category;
034
035@Category({ MiscTests.class, SmallTests.class })
036public class TestReusablePoolMap extends PoolMapTestBase {
037
038  @ClassRule
039  public static final HBaseClassTestRule CLASS_RULE =
040      HBaseClassTestRule.forClass(TestReusablePoolMap.class);
041
042  @Override
043  protected PoolType getPoolType() {
044    return PoolType.Reusable;
045  }
046
047  @Test
048  public void testSingleThreadedClient() throws InterruptedException, ExecutionException {
049    Random rand = ThreadLocalRandom.current();
050    String randomKey = String.valueOf(rand.nextInt());
051    String randomValue = String.valueOf(rand.nextInt());
052    // As long as we poll values we put, the pool size should remain zero
053    runThread(randomKey, randomValue, randomValue);
054    assertEquals(0, poolMap.size(randomKey));
055  }
056
057  @Test
058  public void testMultiThreadedClients() throws InterruptedException, ExecutionException {
059    Random rand = ThreadLocalRandom.current();
060    // As long as we poll values we put, the pool size should remain zero
061    for (int i = 0; i < POOL_SIZE; i++) {
062      String randomKey = String.valueOf(rand.nextInt());
063      String randomValue = String.valueOf(rand.nextInt());
064      runThread(randomKey, randomValue, randomValue);
065      assertEquals(0, poolMap.size(randomKey));
066    }
067    poolMap.clear();
068    String randomKey = String.valueOf(rand.nextInt());
069    for (int i = 0; i < POOL_SIZE - 1; i++) {
070      String randomValue = String.valueOf(rand.nextInt());
071      runThread(randomKey, randomValue, randomValue);
072      assertEquals(0, poolMap.size(randomKey));
073    }
074    assertEquals(0, poolMap.size(randomKey));
075  }
076
077  @Test
078  public void testPoolCap() throws InterruptedException, ExecutionException {
079    Random rand = ThreadLocalRandom.current();
080    // As long as we poll values we put, the pool size should remain zero
081    String randomKey = String.valueOf(rand.nextInt());
082    List<String> randomValues = new ArrayList<>();
083    for (int i = 0; i < POOL_SIZE * 2; i++) {
084      String randomValue = String.valueOf(rand.nextInt());
085      randomValues.add(randomValue);
086      runThread(randomKey, randomValue, randomValue);
087    }
088    assertEquals(0, poolMap.size(randomKey));
089  }
090}