DanielWang2035 commented on code in PR #17238: URL: https://github.com/apache/iotdb/pull/17238#discussion_r3279153573
########## iotdb-core/datanode/src/main/java/org/apache/iotdb/db/subscription/broker/consensus/ConsensusPrefetchingQueue.java: ########## @@ -0,0 +1,3443 @@ +/* + * 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.commons.consensus.ConsensusGroupId; +import org.apache.iotdb.commons.queryengine.plan.planner.plan.node.PlanNode; +import org.apache.iotdb.commons.queryengine.plan.planner.plan.node.PlanNodeType; +import org.apache.iotdb.commons.request.IConsensusRequest; +import org.apache.iotdb.commons.subscription.config.SubscriptionConfig; +import org.apache.iotdb.consensus.common.request.IndexedConsensusRequest; +import org.apache.iotdb.consensus.common.request.IoTConsensusRequest; +import org.apache.iotdb.consensus.iot.IoTConsensusServerImpl; +import org.apache.iotdb.consensus.iot.SubscriptionWalRetentionPolicy; +import org.apache.iotdb.consensus.iot.WriterSafeFrontierTracker; +import org.apache.iotdb.consensus.iot.log.ConsensusReqReader; +import org.apache.iotdb.db.conf.IoTDBDescriptor; +import org.apache.iotdb.db.pipe.agent.PipeDataNodeAgent; +import org.apache.iotdb.db.pipe.resource.memory.PipeMemoryWeightUtil; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.write.InsertMultiTabletsNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.write.InsertNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.write.InsertRowNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.write.InsertRowsNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.write.InsertRowsOfOneDeviceNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.write.InsertTabletNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.write.SearchNode; +import org.apache.iotdb.db.storageengine.dataregion.wal.buffer.WALEntry; +import org.apache.iotdb.db.storageengine.dataregion.wal.io.ProgressWALReader; +import org.apache.iotdb.db.storageengine.dataregion.wal.io.WALMetaData; +import org.apache.iotdb.db.storageengine.dataregion.wal.node.WALNode; +import org.apache.iotdb.db.storageengine.dataregion.wal.utils.WALFileUtils; +import org.apache.iotdb.db.subscription.event.SubscriptionEvent; +import org.apache.iotdb.db.subscription.metric.ConsensusSubscriptionPrefetchingQueueMetrics; +import org.apache.iotdb.db.subscription.task.execution.ConsensusSubscriptionPrefetchExecutor; +import org.apache.iotdb.db.subscription.task.execution.ConsensusSubscriptionPrefetchExecutorManager; +import org.apache.iotdb.db.subscription.task.subtask.ConsensusPrefetchSubtask; +import org.apache.iotdb.rpc.subscription.config.TopicConfig; +import org.apache.iotdb.rpc.subscription.config.TopicConstant; +import org.apache.iotdb.rpc.subscription.payload.poll.ErrorPayload; +import org.apache.iotdb.rpc.subscription.payload.poll.RegionProgress; +import org.apache.iotdb.rpc.subscription.payload.poll.SubscriptionCommitContext; +import org.apache.iotdb.rpc.subscription.payload.poll.SubscriptionPollResponseType; +import org.apache.iotdb.rpc.subscription.payload.poll.TabletsPayload; +import org.apache.iotdb.rpc.subscription.payload.poll.WatermarkPayload; +import org.apache.iotdb.rpc.subscription.payload.poll.WriterId; +import org.apache.iotdb.rpc.subscription.payload.poll.WriterProgress; + +import org.apache.tsfile.utils.Pair; +import org.apache.tsfile.write.record.Tablet; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.File; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashMap; +import java.util.LinkedHashMap; +import java.util.LinkedHashSet; +import java.util.List; +import java.util.Map; +import java.util.NavigableMap; +import java.util.Objects; +import java.util.PriorityQueue; +import java.util.Set; +import java.util.TreeMap; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.LinkedBlockingDeque; +import java.util.concurrent.PriorityBlockingQueue; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicLong; +import java.util.concurrent.locks.ReentrantReadWriteLock; +import java.util.function.BiConsumer; +import java.util.function.Function; +import java.util.function.Predicate; +import java.util.function.Supplier; + +import static org.apache.iotdb.rpc.subscription.payload.poll.SubscriptionCommitContext.INVALID_COMMIT_ID; + +public class ConsensusPrefetchingQueue { + + private static final Logger LOGGER = LoggerFactory.getLogger(ConsensusPrefetchingQueue.class); + + private final String brokerId; // consumer group id + private final String topicName; + private final ConsensusGroupId consensusGroupId; + + private final IoTConsensusServerImpl serverImpl; + + private final ConsensusReqReader consensusReqReader; + + private final SubscriptionWalRetentionPolicy retentionPolicy; + + private final WakeableIndexedConsensusQueue pendingEntries; + + private static final int PENDING_QUEUE_CAPACITY = 4096; + + private final ConsensusLogToTabletConverter converter; + + private final ConsensusSubscriptionCommitManager commitManager; + + private final AtomicLong seekGeneration; + + /** Internal WAL reader cursor used only for local replay positioning and deduplication. */ + private final AtomicLong nextExpectedSearchIndex; + + private final PriorityBlockingQueue<SubscriptionEvent> prefetchingQueue; + + private final Map<Pair<String, SubscriptionCommitContext>, SubscriptionEvent> inFlightEvents; Review Comment: Replaced the Pair key with a dedicated InFlightEventKey containing consumerId and commitContext. -- This is an automated message from the Apache Git Service. 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