satishd commented on a change in pull request #11058: URL: https://github.com/apache/kafka/pull/11058#discussion_r719225490
########## File path: storage/src/main/java/org/apache/kafka/server/log/remote/metadata/storage/RemoteLogMetadataSnapshotFile.java ########## @@ -0,0 +1,252 @@ +/* + * 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.kafka.server.log.remote.metadata.storage; + +import org.apache.kafka.common.KafkaException; +import org.apache.kafka.common.Uuid; +import org.apache.kafka.common.utils.Utils; +import org.apache.kafka.server.log.remote.metadata.storage.serialization.RemoteLogMetadataSerde; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.File; +import java.io.FileInputStream; +import java.io.FileOutputStream; +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.channels.Channels; +import java.nio.channels.ReadableByteChannel; +import java.nio.channels.WritableByteChannel; +import java.nio.file.Path; +import java.util.ArrayList; +import java.util.Collection; +import java.util.List; +import java.util.Objects; +import java.util.Optional; + +/** + * This class represents the remote log data snapshot stored in a file for a specific topic partition. This is used by + * {@link TopicBasedRemoteLogMetadataManager} to store the remote log metadata received for a specific partition from + * remote log metadata topic. This will avoid reading the remote log metadata messages from the topic again when a + * broker restarts. + */ +public class RemoteLogMetadataSnapshotFile { + private static final Logger log = LoggerFactory.getLogger(RemoteLogMetadataSnapshotFile.class); + + public static final String COMMITTED_LOG_METADATA_SNAPSHOT_FILE_NAME = "remote_log_snapshot"; + + // header: <version:short><topicId:2 longs><metadata-partition:int><metadata-partition-offset:long> Review comment: I removed it as suggested. -- 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: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
