/*
 * 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.iotdb.db.schemaengine.schemaregion.attribute.update;

import org.apache.iotdb.db.conf.IoTDBDescriptor;

// For degrade
public class UpdateDetailContainerStatistics {
  private static final long MIN_DEGRADE_MEMORY =
      IoTDBDescriptor.getInstance().getConfig().getDetailContainerMinDegradeMemoryInBytes();
  private long lastUpdateTime = System.currentTimeMillis();

  private long entrySize = 0;

  long getContainerSize() {
    return entrySize + UpdateDetailContainer.INSTANCE_SIZE;
  }

  void addEntrySize(final long increment) {
    this.entrySize += increment;
  }

  void decreaseEntrySize(final long decrement) {
    this.entrySize -= decrement;
    lastUpdateTime = System.currentTimeMillis();
  }

  boolean needDegrade() {
    return entrySize >= MIN_DEGRADE_MEMORY;
  }

  long getDegradePriority() {
    return entrySize * (System.currentTimeMillis() - lastUpdateTime);
  }
}
