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 */ 019package org.apache.hadoop.hbase.replication.regionserver; 020 021import org.apache.hadoop.conf.Configuration; 022import org.apache.hadoop.hbase.replication.ReplicationQueueInfo; 023import org.apache.yetus.audience.InterfaceAudience; 024import org.slf4j.Logger; 025import org.slf4j.LoggerFactory; 026 027/** 028 * Constructs a {@link ReplicationSourceInterface} 029 * Note, not used to create specialized ReplicationSources 030 * @see CatalogReplicationSource 031 */ 032@InterfaceAudience.Private 033public final class ReplicationSourceFactory { 034 private static final Logger LOG = LoggerFactory.getLogger(ReplicationSourceFactory.class); 035 036 private ReplicationSourceFactory() {} 037 038 static ReplicationSourceInterface create(Configuration conf, String queueId) { 039 ReplicationQueueInfo replicationQueueInfo = new ReplicationQueueInfo(queueId); 040 boolean isQueueRecovered = replicationQueueInfo.isQueueRecovered(); 041 ReplicationSourceInterface src; 042 try { 043 String defaultReplicationSourceImpl = 044 isQueueRecovered ? RecoveredReplicationSource.class.getCanonicalName() 045 : ReplicationSource.class.getCanonicalName(); 046 Class<?> c = Class.forName( 047 conf.get("replication.replicationsource.implementation", defaultReplicationSourceImpl)); 048 src = c.asSubclass(ReplicationSourceInterface.class).getDeclaredConstructor().newInstance(); 049 } catch (Exception e) { 050 LOG.warn("Passed replication source implementation throws errors, " 051 + "defaulting to ReplicationSource", 052 e); 053 src = isQueueRecovered ? new RecoveredReplicationSource() : new ReplicationSource(); 054 } 055 return src; 056 } 057}