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 */
018
019package org.apache.hadoop.hbase.coprocessor;
020
021import org.apache.hadoop.hbase.Coprocessor;
022import org.apache.hadoop.hbase.HBaseInterfaceAudience;
023import org.apache.yetus.audience.InterfaceAudience;
024import org.apache.yetus.audience.InterfaceStability;
025
026import java.util.Optional;
027
028@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.COPROC)
029@InterfaceStability.Evolving
030public interface RegionServerCoprocessor extends Coprocessor {
031  default Optional<RegionServerObserver> getRegionServerObserver() {
032    return Optional.empty();
033  }
034}