| /* |
| * 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.hudi.hive.replication; |
| |
| import org.apache.hudi.common.util.Option; |
| |
| import org.apache.hadoop.hive.conf.HiveConf; |
| |
| import java.util.Map; |
| import java.util.Properties; |
| |
| public class ReplicationStateSync implements AutoCloseable { |
| |
| protected GlobalHiveSyncTool globalHiveSyncTool; |
| private Map<String, Option<String>> replicatedTimeStampMap; |
| private Map<String, Option<String>> oldReplicatedTimeStampMap; |
| private final String clusterId; |
| |
| ReplicationStateSync(Properties props, HiveConf hiveConf, String uid) { |
| globalHiveSyncTool = new GlobalHiveSyncTool(props, hiveConf); |
| replicatedTimeStampMap = globalHiveSyncTool.getLastReplicatedTimeStampMap(); |
| clusterId = uid; |
| } |
| |
| public void sync() throws Exception { |
| // the cluster maybe down by the time we reach here so we refresh our replication |
| // state right before we set the oldReplicatedTimeStamp to narrow this window. this is a |
| // liveliness check right before we start. |
| replicatedTimeStampMap = globalHiveSyncTool.getLastReplicatedTimeStampMap(); |
| // it is possible sync fails midway and corrupts the table property therefore we should set |
| // the oldReplicatedTimeStampMap before the sync start so that we attempt to rollback |
| // this will help in scenario where sync failed due to some bug in hivesync but in case where |
| // cluster went down halfway through or before sync in this case rollback may also fail and |
| // that is ok and we want to be alerted to such scenarios. |
| oldReplicatedTimeStampMap = replicatedTimeStampMap; |
| globalHiveSyncTool.syncHoodieTable(); |
| replicatedTimeStampMap = globalHiveSyncTool.getLastReplicatedTimeStampMap(); |
| } |
| |
| public boolean rollback() { |
| if (oldReplicatedTimeStampMap != null) { |
| globalHiveSyncTool.setLastReplicatedTimeStamp(oldReplicatedTimeStampMap); |
| oldReplicatedTimeStampMap = null; |
| } |
| return true; |
| } |
| |
| public boolean replicationStateIsInSync(ReplicationStateSync other) { |
| return globalHiveSyncTool.getLastReplicatedTimeStampMap() |
| .equals(other.globalHiveSyncTool.getLastReplicatedTimeStampMap()); |
| } |
| |
| @Override |
| public String toString() { |
| return "{ clusterId: " + clusterId + " replicatedState: " + replicatedTimeStampMap + " }"; |
| } |
| |
| public String getClusterId() { |
| return clusterId; |
| } |
| |
| @Override |
| public void close() { |
| if (globalHiveSyncTool != null) { |
| globalHiveSyncTool.close(); |
| globalHiveSyncTool = null; |
| } |
| } |
| |
| } |