DanielWang2035 commented on code in PR #17238: URL: https://github.com/apache/iotdb/pull/17238#discussion_r3279204678
########## iotdb-core/datanode/src/main/java/org/apache/iotdb/db/subscription/broker/consensus/SubscriptionConsensusProgress.java: ########## @@ -0,0 +1,200 @@ +/* + * 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.iotdb.db.subscription.broker.consensus; + +import org.apache.iotdb.rpc.subscription.payload.poll.RegionProgress; +import org.apache.iotdb.rpc.subscription.payload.poll.WriterId; +import org.apache.iotdb.rpc.subscription.payload.poll.WriterProgress; + +import org.apache.tsfile.utils.ReadWriteIOUtils; + +import java.io.DataOutputStream; +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.Collections; +import java.util.LinkedHashMap; +import java.util.Map; +import java.util.Objects; +import java.util.concurrent.atomic.AtomicLong; + +/** + * Persisted commit metadata for a single (consumerGroup, topic, region) combination. + * + * <p>This object stores the committed per-writer region frontier plus the persistence throttling + * counter. + */ +public class SubscriptionConsensusProgress { + + private volatile RegionProgress committedRegionProgress; + + private final AtomicLong commitIndex; + + public SubscriptionConsensusProgress() { + this(new RegionProgress(Collections.emptyMap()), 0L); + } + + public SubscriptionConsensusProgress( + final RegionProgress committedRegionProgress, final long commitIndex) { + this.committedRegionProgress = normalize(committedRegionProgress); + this.commitIndex = new AtomicLong(commitIndex); + } + + public RegionProgress getCommittedRegionProgress() { + return committedRegionProgress; + } + + public void setCommittedRegionProgress(final RegionProgress committedRegionProgress) { + this.committedRegionProgress = normalize(committedRegionProgress); + } + + public WriterId getCommittedWriterId() { + return getDerivedCommittedWriterState().writerId; + } + + public WriterProgress getCommittedWriterProgress() { + return getDerivedCommittedWriterState().writerProgress; + } + + public long getCommitIndex() { + return commitIndex.get(); + } + + public void incrementCommitIndex() { + commitIndex.incrementAndGet(); + } + + public void serialize(final DataOutputStream stream) throws IOException { + committedRegionProgress.serialize(stream); + ReadWriteIOUtils.write(commitIndex.get(), stream); + } + + public static SubscriptionConsensusProgress deserialize(final ByteBuffer buffer) { + final RegionProgress committedRegionProgress = RegionProgress.deserialize(buffer); + final long commitIndex = ReadWriteIOUtils.readLong(buffer); + return new SubscriptionConsensusProgress(committedRegionProgress, commitIndex); + } + + @Override + public boolean equals(final Object o) { + if (this == o) { + return true; + } + if (o == null || getClass() != o.getClass()) { + return false; + } + final SubscriptionConsensusProgress that = (SubscriptionConsensusProgress) o; + return commitIndex.get() == that.commitIndex.get() + && Objects.equals(committedRegionProgress, that.committedRegionProgress); + } + + @Override + public int hashCode() { + return Objects.hash(committedRegionProgress, commitIndex.get()); + } + + @Override + public String toString() { + return "SubscriptionConsensusProgress{" + + "committedRegionProgress=" + + committedRegionProgress + + ", commitIndex=" + + commitIndex.get() + + '}'; + } + + private static RegionProgress normalize(final RegionProgress committedRegionProgress) { + if (Objects.isNull(committedRegionProgress) + || committedRegionProgress.getWriterPositions().isEmpty()) { + return new RegionProgress(Collections.emptyMap()); + } + final Map<WriterId, WriterProgress> normalized = new LinkedHashMap<>(); + for (final Map.Entry<WriterId, WriterProgress> entry : + committedRegionProgress.getWriterPositions().entrySet()) { + if (Objects.nonNull(entry.getKey()) && Objects.nonNull(entry.getValue())) { + normalized.put(entry.getKey(), entry.getValue()); + } + } + return new RegionProgress(normalized); + } + + private DerivedCommittedWriterState getDerivedCommittedWriterState() { + WriterId bestWriterId = null; + WriterProgress bestWriterProgress = null; + for (final Map.Entry<WriterId, WriterProgress> entry : + committedRegionProgress.getWriterPositions().entrySet()) { + if (Objects.isNull(bestWriterProgress) + || compareWriterPosition( + entry.getKey(), entry.getValue(), bestWriterId, bestWriterProgress) + > 0) { + bestWriterId = entry.getKey(); + bestWriterProgress = entry.getValue(); + } + } + return new DerivedCommittedWriterState( + bestWriterId, Review Comment: Renamed bestWriterId and bestWriterProgress to latestWriterId and latestWriterProgress. -- 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]
