/*
 * 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.hudi.common.util;

import org.apache.hudi.common.model.HoodieRecord;
import org.apache.hudi.common.model.HoodieRecordPayload;
import org.apache.hudi.common.util.collection.ExternalSpillableMap;

import org.apache.avro.Schema;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;

/**
 * Size Estimator for Hoodie record payload.
 * 
 * @param <T>
 */
public class HoodieRecordSizeEstimator<T extends HoodieRecordPayload> implements SizeEstimator<HoodieRecord<T>> {

  private static final Logger LOG = LogManager.getLogger(HoodieRecordSizeEstimator.class);

  private final long sizeOfSchema;

  public HoodieRecordSizeEstimator(Schema schema) {
    sizeOfSchema = ObjectSizeCalculator.getObjectSize(schema);
  }

  @Override
  public long sizeEstimate(HoodieRecord<T> hoodieRecord) {
    // Most HoodieRecords are bound to have data + schema. Although, the same schema object is shared amongst
    // all records in the JVM. Calculate and print the size of the Schema and of the Record to
    // note the sizes and differences. A correct estimation in such cases is handled in
    /** {@link ExternalSpillableMap} **/
    long sizeOfRecord = ObjectSizeCalculator.getObjectSize(hoodieRecord);
    if (LOG.isDebugEnabled()) {
      LOG.debug("SizeOfRecord => " + sizeOfRecord + " SizeOfSchema => " + sizeOfSchema);
    }
    return sizeOfRecord;
  }
}
