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.file;
  
  import alluxio.conf.Configuration;
  import alluxio.conf.PropertyKey;
  import alluxio.heartbeat.HeartbeatExecutor;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Heartbeat executor for validating inode and block integrity.
   */
  public final class BlockIntegrityChecker implements HeartbeatExecutor {
    private static final Logger LOG = LoggerFactory.getLogger(BlockIntegrityChecker.class);
  
    private final FileSystemMaster mFileSystemMaster;
    private final boolean mRepair;
  
    /**
     * Constructs a block integrity checker based on the given {@link FileSystemMaster}.
     *
     * @param fsm the master to check
     */
    public BlockIntegrityChecker(FileSystemMaster fsm) {
      mFileSystemMaster = fsm;
      mRepair = Configuration
          .getBoolean(PropertyKey.MASTER_PERIODIC_BLOCK_INTEGRITY_CHECK_REPAIR);
    }
  
    @Override
    public void heartbeat(long timeLimitMs) {
      try {
        mFileSystemMaster.validateInodeBlocks(mRepair);
      } catch (Exception e) {
        LOG.error("Failed to run periodic block integrity check.", e);
      }
    }
  
    @Override
    public void close() {
      // Nothing to clean up.
    }
  }
  