001/*
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 * http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019
020package org.apache.hadoop.hbase.security.visibility;
021
022import java.io.IOException;
023import java.util.Optional;
024import org.apache.hadoop.conf.Configuration;
025import org.apache.hadoop.hbase.CoprocessorEnvironment;
026import org.apache.hadoop.hbase.coprocessor.ObserverContext;
027import org.apache.hadoop.hbase.coprocessor.RegionServerCoprocessor;
028import org.apache.hadoop.hbase.coprocessor.RegionServerCoprocessorEnvironment;
029import org.apache.hadoop.hbase.coprocessor.RegionServerObserver;
030import org.apache.hadoop.hbase.replication.ReplicationEndpoint;
031import org.apache.yetus.audience.InterfaceAudience;
032
033/**
034 * A RegionServerObserver impl that provides the custom
035 * VisibilityReplicationEndpoint. This class should be configured as the
036 * 'hbase.coprocessor.regionserver.classes' for the visibility tags to be
037 * replicated as string.  The value for the configuration should be
038 * 'org.apache.hadoop.hbase.security.visibility.VisibilityController$VisibilityReplication'.
039 */
040@InterfaceAudience.Private
041public class VisibilityReplication implements RegionServerCoprocessor, RegionServerObserver {
042  private Configuration conf;
043  private VisibilityLabelService visibilityLabelService;
044
045  @Override
046  public void start(CoprocessorEnvironment env) throws IOException {
047    this.conf = env.getConfiguration();
048    visibilityLabelService = VisibilityLabelServiceManager.getInstance()
049        .getVisibilityLabelService(this.conf);
050  }
051
052  @Override
053  public void stop(CoprocessorEnvironment env) throws IOException {
054  }
055
056  @Override public Optional<RegionServerObserver> getRegionServerObserver() {
057    return Optional.of(this);
058  }
059
060  @Override
061  public ReplicationEndpoint postCreateReplicationEndPoint(
062      ObserverContext<RegionServerCoprocessorEnvironment> ctx, ReplicationEndpoint endpoint) {
063    return new VisibilityReplicationEndpoint(endpoint, visibilityLabelService);
064  }
065}