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 java.util.concurrent.locks.ReentrantReadWriteLock;
021import org.apache.hadoop.hbase.HBaseClassTestRule;
022import org.apache.hadoop.hbase.testclassification.SmallTests;
023import org.junit.Assert;
024import org.junit.ClassRule;
025import org.junit.Test;
026import org.junit.experimental.categories.Category;
027import org.slf4j.Logger;
028import org.slf4j.LoggerFactory;
029
030@Category({ SmallTests.class })
031public class TestIdReadWriteLockStrongRef {
032
033  @ClassRule
034  public static final HBaseClassTestRule CLASS_RULE =
035    HBaseClassTestRule.forClass(TestIdReadWriteLockStrongRef.class);
036
037  private static final Logger LOG = LoggerFactory.getLogger(TestIdReadWriteLockStrongRef.class);
038
039  private IdReadWriteLockStrongRef<Long> idLock = new IdReadWriteLockStrongRef<>();
040
041  @Test
042  public void testGetLock() throws Exception {
043    Long offset_1 = 1L;
044    Long offset_2 = 2L;
045    ReentrantReadWriteLock offsetLock_1 = idLock.getLock(offset_1);
046    ReentrantReadWriteLock offsetLock_2 = idLock.getLock(offset_1);
047    Assert.assertEquals(offsetLock_1, offsetLock_2);
048    ReentrantReadWriteLock offsetLock_3 = idLock.getLock(offset_2);
049    Assert.assertNotEquals(offsetLock_1, offsetLock_3);
050  }
051
052}