| /** |
| * 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.replication; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import org.apache.hadoop.hbase.Cell; |
| import org.apache.hadoop.hbase.HBaseInterfaceAudience; |
| import org.apache.hadoop.hbase.regionserver.wal.WALUtil; |
| import org.apache.hadoop.hbase.wal.WAL.Entry; |
| import org.apache.yetus.audience.InterfaceAudience; |
| |
| /** |
| * A {@link WALEntryFilter} which contains multiple filters and applies them |
| * in chain order |
| */ |
| @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.REPLICATION) |
| public class ChainWALEntryFilter implements WALEntryFilter { |
| |
| private final WALEntryFilter[] filters; |
| private WALCellFilter[] cellFilters; |
| |
| public ChainWALEntryFilter(WALEntryFilter...filters) { |
| this.filters = filters; |
| initCellFilters(); |
| } |
| |
| public ChainWALEntryFilter(List<WALEntryFilter> filters) { |
| ArrayList<WALEntryFilter> rawFilters = new ArrayList<>(filters.size()); |
| // flatten the chains |
| for (WALEntryFilter filter : filters) { |
| if (filter instanceof ChainWALEntryFilter) { |
| Collections.addAll(rawFilters, ((ChainWALEntryFilter) filter).filters); |
| } else { |
| rawFilters.add(filter); |
| } |
| } |
| this.filters = rawFilters.toArray(new WALEntryFilter[rawFilters.size()]); |
| initCellFilters(); |
| } |
| |
| public void initCellFilters() { |
| ArrayList<WALCellFilter> cellFilters = new ArrayList<>(filters.length); |
| for (WALEntryFilter filter : filters) { |
| if (filter instanceof WALCellFilter) { |
| cellFilters.add((WALCellFilter) filter); |
| } |
| } |
| this.cellFilters = cellFilters.toArray(new WALCellFilter[cellFilters.size()]); |
| } |
| |
| @Override |
| public Entry filter(Entry entry) { |
| entry = filterEntry(entry); |
| if (entry == null) { |
| return null; |
| } |
| |
| filterCells(entry); |
| return entry; |
| } |
| |
| protected Entry filterEntry(Entry entry) { |
| for (WALEntryFilter filter : filters) { |
| if (entry == null) { |
| return null; |
| } |
| entry = filter.filter(entry); |
| } |
| return entry; |
| } |
| |
| protected void filterCells(Entry entry) { |
| if (entry == null || cellFilters.length == 0) { |
| return; |
| } |
| WALUtil.filterCells(entry.getEdit(), c -> filterCell(entry, c)); |
| } |
| |
| private Cell filterCell(Entry entry, Cell cell) { |
| for (WALCellFilter filter : cellFilters) { |
| cell = filter.filterCell(entry, cell); |
| if (cell == null) { |
| break; |
| } |
| } |
| return cell; |
| } |
| } |