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.Cell; 021import org.apache.hadoop.hbase.HBaseInterfaceAudience; 022import org.apache.yetus.audience.InterfaceAudience; 023import org.apache.hadoop.hbase.wal.WAL.Entry; 024 025/** 026 * A filter for WAL entry cells before being sent over to replication. 027 */ 028@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.REPLICATION) 029public interface WALCellFilter { 030 031 /** 032 * Applies the filter, possibly returning a different Cell instance. 033 * If null is returned, the cell will be skipped. 034 * @param entry Entry which contains the cell 035 * @param cell Cell to filter 036 * @return a (possibly modified) Cell to use. Returning null will cause the cell 037 * to be skipped for replication. 038 */ 039 public Cell filterCell(Entry entry, Cell cell); 040 041}