content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.client.file.cache;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotEquals;
  import static org.junit.Assert.assertNotNull;
  
  import alluxio.conf.AlluxioConfiguration;
  import alluxio.conf.Configuration;
  
  import org.junit.Test;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.Future;
  
  public class CacheManagerTest {
    private final AlluxioConfiguration mConf = Configuration.global();
  
    @Test
    public void factoryGet() throws Exception {
      CacheManager manager = CacheManager.Factory.get(mConf);
      assertEquals(manager, CacheManager.Factory.get(mConf));
    }
  
    @Test
    public void factoryGetConcurrently() throws Exception {
      CacheManager.Factory.clear();
      int cnt = 10;
      List<Future<CacheManager>> cacheManagersList = new ArrayList<>(cnt);
      ExecutorService executorService = Executors.newFixedThreadPool(cnt);
      for (int i = 0; i < cnt; i++) {
        cacheManagersList.add(executorService.submit(() -> {
          try {
            return CacheManager.Factory.get(mConf);
          } catch (Exception e) {
            return null;
          }
        }));
      }
  
      CacheManager checkedCacheManager = CacheManager.Factory.get(mConf);
      for (Future<CacheManager> f : cacheManagersList) {
        CacheManager cacheManager = f.get();
        assertNotNull(cacheManager);
        assertEquals(cacheManager, checkedCacheManager);
      }
    }
  
    @Test
    public void factoryCreate() throws Exception {
      CacheManagerOptions cacheManagerOptions = CacheManagerOptions.create(mConf);
      CacheManager manager =
          CacheManager.Factory.create(mConf, cacheManagerOptions,
              PageMetaStore.create(cacheManagerOptions));
      assertNotEquals(manager,
          CacheManager.Factory.create(mConf, cacheManagerOptions,
              PageMetaStore.create(cacheManagerOptions)));
    }
  
    @Test
    public void factoryClear() throws Exception {
      CacheManager manager = CacheManager.Factory.get(mConf);
      CacheManager.Factory.clear();
      assertNotEquals(manager, CacheManager.Factory.get(mConf));
    }
  }
  