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.regionserver.wal;
019
020import static org.junit.jupiter.api.Assertions.assertEquals;
021import static org.junit.jupiter.api.Assertions.assertNotNull;
022import static org.junit.jupiter.api.Assertions.assertNotSame;
023
024import java.util.concurrent.CompletableFuture;
025import org.apache.hadoop.conf.Configuration;
026import org.apache.hadoop.hbase.HBaseConfiguration;
027import org.apache.hadoop.hbase.testclassification.RegionServerTests;
028import org.apache.hadoop.hbase.testclassification.SmallTests;
029import org.junit.jupiter.api.Tag;
030import org.junit.jupiter.api.Test;
031
032@Tag(RegionServerTests.TAG)
033@Tag(SmallTests.TAG)
034public class TestSyncFutureCache {
035
036  @Test
037  public void testSyncFutureCacheLifeCycle() throws Exception {
038    final Configuration conf = HBaseConfiguration.create();
039    SyncFutureCache cache = new SyncFutureCache(conf);
040    try {
041      SyncFuture future0 = cache.getIfPresentOrNew().reset(0, false);
042      assertNotNull(future0);
043      // Get another future from the same thread, should be different one.
044      SyncFuture future1 = cache.getIfPresentOrNew().reset(1, false);
045      assertNotNull(future1);
046      assertNotSame(future0, future1);
047      cache.offer(future1);
048      // Should override.
049      cache.offer(future0);
050      SyncFuture future3 = cache.getIfPresentOrNew();
051      assertEquals(future3, future0);
052      final SyncFuture[] future4 = new SyncFuture[1];
053      // From a different thread
054      CompletableFuture.runAsync(() -> future4[0] = cache.getIfPresentOrNew().reset(4, false))
055        .get();
056      assertNotNull(future4[0]);
057      assertNotSame(future3, future4[0]);
058      // Clean up
059      cache.offer(future3);
060      cache.offer(future4[0]);
061    } finally {
062      cache.clear();
063    }
064  }
065}