devmadhuu commented on code in PR #6272: URL: https://github.com/apache/ozone/pull/6272#discussion_r1541220896
########## hadoop-ozone/recon/src/main/java/org/apache/hadoop/ozone/recon/tasks/SeqIdGenInfoHandler.java: ########## @@ -0,0 +1,113 @@ +/* + * 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 + * <p> + * http://www.apache.org/licenses/LICENSE-2.0 + * <p> + * 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.ozone.recon.tasks; + +import org.apache.commons.lang3.tuple.ImmutablePair; +import org.apache.commons.lang3.tuple.Pair; +import org.apache.hadoop.ozone.recon.scm.ReconScmMetadataManager; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.IOException; + +/** + * Manages sequenceId Table info of SCM MetaData DB, updates Recon's in-memory + * SequenceIdGenerator objects. + */ +public class SeqIdGenInfoHandler implements SCMMetaDataTableHandler { + + private static final Logger LOG = + LoggerFactory.getLogger(SeqIdGenInfoHandler.class); + + private ReconScmMetadataManager scmMetadataManager; + + public SeqIdGenInfoHandler(ReconScmMetadataManager scmMetadataManager) { + this.scmMetadataManager = scmMetadataManager; + } + + /** + * Handles a PUT event on scm metadata DB tables. + * + * @param event The PUT event to be processed. + */ + @Override + public void handlePutEvent(RocksDBUpdateEvent<?, Object> event) { + final String sequenceIdName = (String) event.getKey(); + final Long lastId = (Long) event.getValue(); + try { + LOG.info("handlePutEvent for add new seqIdGen event for sequence name: {}", sequenceIdName); + handlePutSequenceIdGenEvent(sequenceIdName, lastId); + } catch (IOException ioe) { + LOG.error("Unexpected error while handling add new seqIdGen event for sequence name: {} - ", sequenceIdName, ioe); + } + } + + private void handlePutSequenceIdGenEvent(String sequenceIdName, Long lastId) throws IOException { + scmMetadataManager.getSequenceIdGen().initialize(sequenceIdName, lastId); + } + + /** + * Handles a DELETE event on scm metadata DB tables. + * + * @param event The DELETE event to be processed. + */ + @Override + public void handleDeleteEvent(RocksDBUpdateEvent<?, Object> event) { + final String sequenceIdName = (String) event.getKey(); + LOG.error("Delete event should not be raised on sequenceId table for sequence name: {} - ", sequenceIdName); Review Comment: This delete event, we can throw `UnsupportedOperationException`. Will do change. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
