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.master;
  
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  import alluxio.ConfigurationRule;
  import alluxio.clock.ManualClock;
  import alluxio.conf.Configuration;
  import alluxio.conf.PropertyKey;
  
  import com.google.common.collect.ImmutableMap;
  import org.junit.Before;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.ExpectedException;
  
  /**
   * Unit tests for {@link SafeModeManager}.
   */
  public class SafeModeManagerTest {
    private static final String SAFEMODE_WAIT_TEST = "100ms";
  
    private SafeModeManager mSafeModeManager;
    private ManualClock mClock;
  
    @Rule
    public ConfigurationRule mConfiguration = new ConfigurationRule(ImmutableMap
        .of(PropertyKey.MASTER_WORKER_CONNECT_WAIT_TIME, SAFEMODE_WAIT_TEST),
        Configuration.modifiableGlobal());
  
    @Rule
    public ExpectedException mThrown = ExpectedException.none();
  
    /**
     * Sets up the dependencies before a test runs.
     */
    @Before
    public void before() throws Exception {
      mClock = new ManualClock();
      mSafeModeManager = new DefaultSafeModeManager(mClock);
    }
  
    @Test
    public void defaultSafeMode() throws Exception {
      assertTrue(mSafeModeManager.isInSafeMode());
    }
  
    @Test
    public void enterSafeModeOnPrimaryMasterStart() throws Exception {
      mSafeModeManager.notifyPrimaryMasterStarted();
  
      assertTrue(mSafeModeManager.isInSafeMode());
    }
  
    @Test
    public void enterSafeModeOnRpcServerStart() throws Exception {
      mSafeModeManager.notifyRpcServerStarted();
  
      assertTrue(mSafeModeManager.isInSafeMode());
    }
  
    @Test
    public void leaveSafeModeAfterRpcServerStart() throws Exception {
      mSafeModeManager.notifyRpcServerStarted();
      mClock.addTimeMs(Configuration.getMs(PropertyKey.MASTER_WORKER_CONNECT_WAIT_TIME) + 10);
  
      assertFalse(mSafeModeManager.isInSafeMode());
    }
  
    @Test
    public void stayInSafeModeAfterPrimaryMasterStart() throws Exception {
      mSafeModeManager.notifyPrimaryMasterStarted();
      mClock.addTimeMs(Configuration.getMs(PropertyKey.MASTER_WORKER_CONNECT_WAIT_TIME) + 10);
  
      assertTrue(mSafeModeManager.isInSafeMode());
    }
  
    @Test
    public void reenterSafeModeOnPrimaryMasterStart() throws Exception {
      mSafeModeManager.notifyRpcServerStarted();
      mClock.addTimeMs(Configuration.getMs(PropertyKey.MASTER_WORKER_CONNECT_WAIT_TIME) + 10);
      mSafeModeManager.notifyPrimaryMasterStarted();
  
      assertTrue(mSafeModeManager.isInSafeMode());
    }
  
    @Test
    public void reenterSafeModeOnRpcServerStart() throws Exception {
      mSafeModeManager.notifyRpcServerStarted();
      mClock.addTimeMs(Configuration.getMs(PropertyKey.MASTER_WORKER_CONNECT_WAIT_TIME) + 10);
      mSafeModeManager.notifyRpcServerStarted();
  
      assertTrue(mSafeModeManager.isInSafeMode());
    }
  
    @Test
    public void reenterSafeModeOnRpcServerStartWhileInSafeMode() throws Exception {
      mSafeModeManager.notifyRpcServerStarted();
  
      // Enters safe mode again while in safe mode.
      mClock.addTimeMs(Configuration.getMs(PropertyKey.MASTER_WORKER_CONNECT_WAIT_TIME) - 10);
      mSafeModeManager.notifyRpcServerStarted();
      mClock.addTimeMs(Configuration.getMs(PropertyKey.MASTER_WORKER_CONNECT_WAIT_TIME) - 10);
  
      // Verifies safe mode timer is reset.
      assertTrue(mSafeModeManager.isInSafeMode());
      mClock.addTimeMs(20);
      assertFalse(mSafeModeManager.isInSafeMode());
    }
  
    @Test
    public void reenterSafeModeOnPrimaryMasterStartWhileInSafeMode() throws Exception {
      mSafeModeManager.notifyRpcServerStarted();
  
      // Enters safe mode again while in safe mode.
      mClock.addTimeMs(Configuration.getMs(PropertyKey.MASTER_WORKER_CONNECT_WAIT_TIME) - 10);
      mSafeModeManager.notifyPrimaryMasterStarted();
      mClock.addTimeMs(Configuration.getMs(PropertyKey.MASTER_WORKER_CONNECT_WAIT_TIME) - 10);
  
      // Verifies safe mode timer is cleared.
      assertTrue(mSafeModeManager.isInSafeMode());
      mClock.addTimeMs(20);
      assertTrue(mSafeModeManager.isInSafeMode());
    }
  }
  