klsince commented on code in PR #13107: URL: https://github.com/apache/pinot/pull/13107#discussion_r1631496448
########## pinot-common/src/main/java/org/apache/pinot/common/utils/UploadedRealtimeSegmentName.java: ########## @@ -0,0 +1,180 @@ +/** + * 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.pinot.common.utils; + +import com.google.common.base.Joiner; +import com.google.common.base.Preconditions; +import java.util.Objects; +import javax.annotation.Nullable; +import org.apache.commons.lang3.StringUtils; +import org.joda.time.format.DateTimeFormat; +import org.joda.time.format.DateTimeFormatter; + + +/** + * Class to represent segment names like: {prefix}__{tableName}__{partitionId}__{creationTime}__{suffix} + * + * <p>This naming convention is adopted to represent a segment uploaded to a realtime table. The naming + * convention has been kept semantically similar to {@link LLCSegmentName} but differs in following ways: + * + * <li> prefix to quickly identify the type/source of segment e.g. "uploaded"/"minion" + * <li> tableName to be same as the table name of segment + * <li> partitionId to identify the right parition for upsert table segment table assignment. + * <li> creationTime creation time of segment of the format yyyyMMdd'T'HHmm'Z' + * <li> suffix to deduplicate segment names created at the same time + * + * Use {@link org.apache.pinot.segment.spi.creator.name.UploadedRealtimeSegmentNameGenerator} to generate segment names. + */ +public class UploadedRealtimeSegmentName implements Comparable<UploadedRealtimeSegmentName> { + + private static final String SEPARATOR = "__"; + private static final String DATE_FORMAT = "yyyyMMdd'T'HHmm'Z'"; + private static final DateTimeFormatter DATE_FORMATTER = DateTimeFormat.forPattern(DATE_FORMAT).withZoneUTC(); + private final String _prefix; + private final String _tableName; + private final int _partitionId; + private final String _creationTime; + private final String _segmentName; + private final String _suffix; + + public UploadedRealtimeSegmentName(String segmentName) { + + // split the segment name by the separator and get creation time, sequence id, partition id and table name from + // the end and validate segment name starts with prefix uploaded_ Review Comment: this comment might need update as well ########## pinot-segment-local/src/main/java/org/apache/pinot/segment/local/upsert/ConcurrentMapPartitionUpsertMetadataManager.java: ########## @@ -158,6 +158,47 @@ protected void addOrReplaceSegment(ImmutableSegmentImpl segment, ThreadSafeMutab } } + /** + * <li> When the replacing segment and current segment are of {@link LLCSegmentName} then the PK should resolve to + * row in segment with higher sequence id. + * <li> If either or both are not LLC segment, then resolve based on creation time of segment. If creation time is + * same then prefer uploaded segment if other is LLCSegmentName + * <li> If both are uploaded segment, prefer standard UploadedRealtimeSegmentName, if still a tie, then resolve to + * current segment. + * + * @param segmentName replacing segment name + * @param currentSegmentName current segment name having the record for the given primary key + * @param segmentCreationTimeMs replacing segment creation time + * @param currentSegmentCreationTimeMs current segment creation time + * @return true if the record in replacing segment should replace the record in current segment + */ + protected boolean shouldReplaceOnComparisonTie(String segmentName, String currentSegmentName, + long segmentCreationTimeMs, long currentSegmentCreationTimeMs) { + + // resolve using sequence id if both are LLCSegmentName + LLCSegmentName llcSegmentName = LLCSegmentName.of(segmentName); + LLCSegmentName currentLLCSegmentName = LLCSegmentName.of(currentSegmentName); + if (llcSegmentName != null && currentLLCSegmentName != null) { + return llcSegmentName.getSequenceNumber() > currentLLCSegmentName.getSequenceNumber(); + } + + // either or both are uploaded segments, prefer the latest segment + int creationTimeComparisonRes = Long.compare(segmentCreationTimeMs, currentSegmentCreationTimeMs); + if ((llcSegmentName == null || currentLLCSegmentName == null) && creationTimeComparisonRes != 0) { Review Comment: `(llcSegmentName == null || currentLLCSegmentName == null)` would be always true? ########## pinot-segment-spi/src/main/java/org/apache/pinot/segment/spi/creator/name/UploadedRealtimeSegmentNameGenerator.java: ########## @@ -0,0 +1,93 @@ +/** + * 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.pinot.segment.spi.creator.name; + +import com.google.common.base.Joiner; +import com.google.common.base.Preconditions; +import javax.annotation.Nullable; +import org.apache.commons.lang3.StringUtils; + + +/** + * Implementation for generating segment names of the format UploadedRealtimeSegmentName: + * {prefix}__{tableName}__{partitionId}__{creationTime}__{suffix} + * + * <p>This naming convention is adopted to represent uploaded segments to a realtime table see + * UploadedRealtimeSegmentName. The semantic is similar + * to LLCSegmentName. This naming convention should be preferred when the data is partitioned in offline generated + * segments and should be assigned based same as realtime segments of the table generated from stream. + */ +public class UploadedRealtimeSegmentNameGenerator implements SegmentNameGenerator { + + private static final String DELIMITER = "__"; + private final String _tableName; + private final int _partitionId; + // creation time must be in long and milliseconds since epoch to be consistent with creation.meta time for valid + // comparison in segment replace flow. + private final long _creationTimeMillis; + private final String _prefix; + + // if suffix is not set then sequenceId is used as segment name suffix + @Nullable + private final String _suffix; + + /** + * Creates a UploadedRealtimeSegmentNameGenerator + * @param tableName + * @param partitionId + * @param creationTimeMillis + * @param prefix + * @param suffix optional field for generator, if not specified then sequenceId is used as suffix + */ + public UploadedRealtimeSegmentNameGenerator(String tableName, int partitionId, long creationTimeMillis, + @Nullable String prefix, String suffix) { Review Comment: you meant to annotate suffix as `@Nullable` -- This is an automated message from the Apache Git Service. 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