001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.regionserver;
019
020import org.apache.hadoop.hbase.ServerName;
021import org.apache.yetus.audience.InterfaceAudience;
022
023/**
024 * Interface to Map of online regions. In the Map, the key is the region's encoded name and the
025 * value is an {@link Region} instance.
026 */
027@InterfaceAudience.Private
028public interface MutableOnlineRegions extends OnlineRegions {
029
030  /**
031   * Add to online regions. n
032   */
033  void addRegion(final HRegion r);
034
035  /**
036   * Removes the given Region from the list of onlineRegions.
037   * @param r           Region to remove.
038   * @param destination Destination, if any, null otherwise.
039   * @return True if we removed a region from online list.
040   */
041  boolean removeRegion(final HRegion r, ServerName destination);
042}