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 java.util.UUID; 021import org.apache.hadoop.hbase.HBaseInterfaceAudience; 022import org.apache.hadoop.hbase.wal.WAL.Entry; 023import org.apache.hadoop.hbase.wal.WALEdit; 024import org.apache.hadoop.hbase.wal.WALKeyImpl; 025import org.apache.yetus.audience.InterfaceAudience; 026import org.apache.yetus.audience.InterfaceStability; 027 028/** 029 * Filters out entries with our peerClusterId (i.e. already replicated) and marks all other entries 030 * with our clusterID 031 */ 032@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.REPLICATION) 033@InterfaceStability.Evolving 034public class ClusterMarkingEntryFilter implements WALEntryFilter { 035 private UUID clusterId; 036 private UUID peerClusterId; 037 private ReplicationEndpoint replicationEndpoint; 038 039 /** 040 * @param clusterId id of this cluster 041 * @param peerClusterId of the other cluster 042 * @param replicationEndpoint ReplicationEndpoint which will handle the actual replication 043 */ 044 public ClusterMarkingEntryFilter(UUID clusterId, UUID peerClusterId, 045 ReplicationEndpoint replicationEndpoint) { 046 this.clusterId = clusterId; 047 this.peerClusterId = peerClusterId; 048 this.replicationEndpoint = replicationEndpoint; 049 } 050 051 @Override 052 public Entry filter(Entry entry) { 053 // don't replicate if the log entries have already been consumed by the cluster 054 if ( 055 replicationEndpoint.canReplicateToSameCluster() 056 || !entry.getKey().getClusterIds().contains(peerClusterId) 057 ) { 058 WALEdit edit = entry.getEdit(); 059 WALKeyImpl logKey = (WALKeyImpl) entry.getKey(); 060 061 if (edit != null && !edit.isEmpty()) { 062 // Mark that the current cluster has the change 063 logKey.addClusterId(clusterId); 064 return entry; 065 } 066 } 067 return null; 068 } 069}