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.cassandra.db.commitlog;
  
  import java.io.IOException;
  
  import org.apache.cassandra.io.util.File;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.db.Mutation;
  import org.apache.cassandra.db.rows.DeserializationHelper;
  import org.apache.cassandra.io.util.DataInputBuffer;
  import org.apache.cassandra.io.util.RebufferingInputStream;
  
  /**
   * Utility class that flags the replayer as having seen a CDC mutation and calculates offset but doesn't apply mutations
   */
  public class CDCTestReplayer extends CommitLogReplayer
  {
      private static final Logger logger = LoggerFactory.getLogger(CDCTestReplayer.class);
  
      public CDCTestReplayer() throws IOException
      {
          super(CommitLog.instance, CommitLogPosition.NONE, null, ReplayFilter.create());
          CommitLog.instance.sync(true);
          commitLogReader = new CommitLogTestReader();
      }
  
      public void examineCommitLog() throws IOException
      {
          replayFiles(new File(DatabaseDescriptor.getCommitLogLocation()).tryList());
      }
  
      private class CommitLogTestReader extends CommitLogReader
      {
          @Override
          protected void readMutation(CommitLogReadHandler handler,
                                      byte[] inputBuffer,
                                      int size,
                                      CommitLogPosition minPosition,
                                      final int entryLocation,
                                      final CommitLogDescriptor desc) throws IOException
          {
              RebufferingInputStream bufIn = new DataInputBuffer(inputBuffer, 0, size);
              Mutation mutation;
              try
              {
                  mutation = Mutation.serializer.deserialize(bufIn, desc.getMessagingVersion(), DeserializationHelper.Flag.LOCAL);
                  if (mutation.trackedByCDC())
                      sawCDCMutation = true;
              }
              catch (IOException e)
              {
                  // Test fails.
                  throw new AssertionError(e);
              }
          }
      }
  }
  