hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestIdReadWriteLockStrongRef.java

   1 /**
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 package org.apache.hadoop.hbase.util;
  19
  20 import java.util.concurrent.locks.ReentrantReadWriteLock;
  21
  22 import org.apache.hadoop.hbase.HBaseClassTestRule;
  23 import org.apache.hadoop.hbase.testclassification.SmallTests;
  24 import org.junit.Assert;
  25 import org.junit.ClassRule;
  26 import org.junit.Test;
  27 import org.junit.experimental.categories.Category;
  28 import org.slf4j.Logger;
  29 import org.slf4j.LoggerFactory;
  30
  31
  32 @Category({ SmallTests.class })
  33 public class TestIdReadWriteLockStrongRef {
  34
  35   @ClassRule
  36   public static final HBaseClassTestRule CLASS_RULE =
  37       HBaseClassTestRule.forClass(TestIdReadWriteLockStrongRef.class);
  38
  39   private static final Logger LOG = LoggerFactory.getLogger(TestIdReadWriteLockStrongRef.class);
  40
  41   private IdReadWriteLockStrongRef<Long> idLock = new IdReadWriteLockStrongRef<>();
  42
  43   @Test
  44   public void testGetLock() throws Exception {
  45     Long offset_1 = 1L;
  46     Long offset_2 = 2L;
  47     ReentrantReadWriteLock offsetLock_1 = idLock.getLock(offset_1);
  48     ReentrantReadWriteLock offsetLock_2 = idLock.getLock(offset_1);
  49     Assert.assertEquals(offsetLock_1,offsetLock_2);
  50     ReentrantReadWriteLock offsetLock_3 = idLock.getLock(offset_2);
  51     Assert.assertNotEquals(offsetLock_1,offsetLock_3);
  52   }
  53
  54 }
  55