content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.ambari.annotations;
  
  import java.sql.SQLException;
  import java.util.ArrayList;
  import java.util.EnumSet;
  import java.util.List;
  import java.util.Set;
  import java.util.concurrent.locks.Lock;
  import java.util.concurrent.locks.ReadWriteLock;
  
  import org.apache.ambari.annotations.TransactionalLock.LockArea;
  import org.apache.ambari.server.AmbariException;
  import org.apache.ambari.server.H2DatabaseCleaner;
  import org.apache.ambari.server.orm.GuiceJpaInitializer;
  import org.apache.ambari.server.orm.InMemoryDefaultTestModule;
  import org.apache.ambari.server.orm.TransactionalLocks;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  
  import com.google.inject.Guice;
  import com.google.inject.Injector;
  
  import junit.framework.Assert;
  
  /**
   * Tests {@link TransactionalLocks} and {@link LockArea} and associated classes.
   */
  public class LockAreaTest {
  
    private Injector m_injector;
  
    @Before
    public void setup() throws Exception {
      m_injector = Guice.createInjector(new InMemoryDefaultTestModule());
      m_injector.getInstance(GuiceJpaInitializer.class);
    }
  
    @After
    public void teardown() throws AmbariException, SQLException {
      H2DatabaseCleaner.clearDatabaseAndStopPersistenceService(m_injector);
    }
  
    /**
     * Tests that for each {@link LockArea}, there's a single {@link Lock}.
     */
    @Test
    public void testTransactionalLockInstantiation() {
      TransactionalLocks locks = m_injector.getInstance(TransactionalLocks.class);
      List<ReadWriteLock> lockList = new ArrayList<>();
      Set<LockArea> lockAreas = EnumSet.allOf(LockArea.class);
      for (LockArea lockArea : lockAreas) {
        ReadWriteLock lock = locks.getLock(lockArea);
        Assert.assertNotNull(lock);
        lockList.add(lock);
      }
  
      for (LockArea lockArea : lockAreas) {
        Assert.assertTrue(lockList.contains(locks.getLock(lockArea)));
      }
    }
  }
  