cmccabe commented on code in PR #12964: URL: https://github.com/apache/kafka/pull/12964#discussion_r1043673991
########## metadata/src/main/java/org/apache/kafka/image/MetadataProvenance.java: ########## @@ -0,0 +1,89 @@ +/* + * 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.image; + +import org.apache.kafka.raft.OffsetAndEpoch; + +import java.util.Objects; + + +/** + * Information about the source of a metadata image. + */ +public final class MetadataProvenance { + public static final MetadataProvenance EMPTY = new MetadataProvenance(-1L, 0, 0L); + + private final long offset; + private final int epoch; + private final long lastContainedLogTimeMs; + + public MetadataProvenance( + long offset, + int epoch, + long lastContainedLogTimeMs + ) { + this.offset = offset; + this.epoch = epoch; + this.lastContainedLogTimeMs = lastContainedLogTimeMs; + } + + public OffsetAndEpoch offsetAndEpoch() { + return new OffsetAndEpoch(offset, epoch); + } + + public long offset() { + return offset; + } + + public int epoch() { + return epoch; + } + + public long lastContainedLogTimeMs() { + return lastContainedLogTimeMs; + } + + public String snapshotName() { Review Comment: It is used in the new metadata loader, which is not part of this PR. It is the name that a snapshot with the given provenance (offset, epoch) would have. I will add a Javadoc comment. -- 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]
