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.asterix.transaction.management.opcallbacks;
  
  import org.apache.asterix.common.exceptions.ACIDException;
  import org.apache.asterix.common.transactions.DatasetId;
  import org.apache.asterix.common.transactions.ILockManager;
  import org.apache.asterix.common.transactions.ITransactionContext;
  import org.apache.asterix.common.transactions.ITransactionSubsystem;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.dataflow.common.data.accessors.ITupleReference;
  
  /**
   * Secondary-index modifications do not require any locking.
   * We assume that the modification of the corresponding primary index has already taken an appropriate lock.
   * This callback performs logging of the before and/or after images for secondary indexes.
   */
  public class SecondaryIndexModificationOperationCallback extends AbstractIndexModificationOperationCallback {
  
      public SecondaryIndexModificationOperationCallback(DatasetId datasetId, int[] primaryKeyFields,
              ITransactionContext txnCtx, ILockManager lockManager, ITransactionSubsystem txnSubsystem, long resourceId,
              int resourcePartition, byte resourceType, Operation indexOp) {
          super(datasetId, primaryKeyFields, txnCtx, lockManager, txnSubsystem, resourceId, resourcePartition,
                  resourceType, indexOp);
      }
  
      @Override
      public void before(ITupleReference tuple) throws HyracksDataException {
          // Do nothing.
      }
  
      @Override
      public void found(ITupleReference before, ITupleReference after) throws HyracksDataException {
          try {
              int pkHash = computePrimaryKeyHashValue(after, primaryKeyFields);
              this.log(pkHash, after, before);
          } catch (ACIDException e) {
              throw HyracksDataException.create(e);
          }
      }
  }
  