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.replication;
019
020import org.apache.hadoop.hbase.security.access.PermissionStorage;
021import org.apache.hadoop.hbase.security.visibility.VisibilityConstants;
022import org.apache.hadoop.hbase.wal.WAL.Entry;
023import org.apache.yetus.audience.InterfaceAudience;
024
025/**
026 * Skips WAL edits for all System tables including hbase:meta except hbase:acl. As of now, only 2
027 * tables can be allowed for replication - hbase:acl and hbase:labels. Other tables which not be
028 * replicated are 1. hbase:meta - not to be replicated 2. hbase:canary - for current cluster 3.
029 * hbase:namespace - Deprecated and moved to meta 4. hbase:quota - related to namespace, quota for
030 * the current cluster usage 5. hbase:rsgroup - contains hostnames
031 */
032@InterfaceAudience.Private
033public class SystemTableWALEntryFilter implements WALEntryFilter {
034  @Override
035  public Entry filter(Entry entry) {
036    if (
037      entry.getKey().getTableName().equals(PermissionStorage.ACL_TABLE_NAME)
038        || entry.getKey().getTableName().equals(VisibilityConstants.LABELS_TABLE_NAME)
039    ) {
040      return entry;
041    }
042    return entry.getKey().getTableName().isSystemTable() ? null : entry;
043  }
044}