/**
 *
 * 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.hadoop.hbase.regionserver;

import java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience;

@InterfaceAudience.Private
public interface CompactionRequestor {
  /**
   * @param r Region to compact
   * @param why Why compaction was requested -- used in debug messages
   * @throws IOException
   */
  public void requestCompaction(final HRegion r, final String why) throws IOException;

  /**
   * @param r Region to compact
   * @param s Store within region to compact
   * @param why Why compaction was requested -- used in debug messages
   * @throws IOException
   */
  public void requestCompaction(final HRegion r, final Store s, final String why)
      throws IOException;

  /**
   * @param r Region to compact
   * @param why Why compaction was requested -- used in debug messages
   * @param pri Priority of this compaction. minHeap. <=0 is critical
   * @throws IOException
   */
  public void requestCompaction(final HRegion r, final String why, int pri) throws IOException;

  /**
   * @param r Region to compact
   * @param s Store within region to compact
   * @param why Why compaction was requested -- used in debug messages
   * @param pri Priority of this compaction. minHeap. <=0 is critical
   * @throws IOException
   */
  public void requestCompaction(final HRegion r, final Store s,
      final String why, int pri) throws IOException;

}