coderzc commented on code in PR #17611: URL: https://github.com/apache/pulsar/pull/17611#discussion_r994056727
########## pulsar-broker/src/main/java/org/apache/pulsar/broker/delayed/BucketDelayedDeliveryTracker.java: ########## @@ -0,0 +1,573 @@ +/** + * 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.pulsar.broker.delayed; + +import static com.google.common.base.Preconditions.checkArgument; +import static org.apache.bookkeeper.mledger.util.Futures.executeWithRetry; +import com.google.common.collect.HashBasedTable; +import com.google.common.collect.Range; +import com.google.common.collect.RangeMap; +import com.google.common.collect.Table; +import com.google.common.collect.TreeRangeMap; +import com.google.protobuf.ByteString; +import io.netty.util.Timeout; +import io.netty.util.Timer; +import java.nio.ByteBuffer; +import java.time.Clock; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.Objects; +import java.util.Optional; +import java.util.Set; +import java.util.TreeSet; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.ExecutionException; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.TimeoutException; +import javax.annotation.concurrent.ThreadSafe; +import lombok.extern.slf4j.Slf4j; +import org.apache.bookkeeper.mledger.ManagedCursor; +import org.apache.bookkeeper.mledger.ManagedLedgerException; +import org.apache.bookkeeper.mledger.impl.PositionImpl; +import org.apache.commons.collections4.CollectionUtils; +import org.apache.commons.lang.StringUtils; +import org.apache.pulsar.broker.delayed.proto.DelayedMessageIndexBucketSnapshotFormat.DelayedIndex; +import org.apache.pulsar.broker.delayed.proto.DelayedMessageIndexBucketSnapshotFormat.SnapshotMetadata; +import org.apache.pulsar.broker.delayed.proto.DelayedMessageIndexBucketSnapshotFormat.SnapshotSegment; +import org.apache.pulsar.broker.delayed.proto.DelayedMessageIndexBucketSnapshotFormat.SnapshotSegmentMetadata; +import org.apache.pulsar.broker.service.persistent.PersistentDispatcherMultipleConsumers; +import org.apache.pulsar.common.util.collections.TripleLongPriorityQueue; +import org.roaringbitmap.RoaringBitmap; + +@Slf4j +@ThreadSafe +public class BucketDelayedDeliveryTracker extends InMemoryDelayedDeliveryTracker { + + protected static final int AsyncOperationTimeoutSeconds = 30; + + public static final String DELAYED_BUCKET_KEY_PREFIX = "#pulsar.internal.delayed.bucket"; + + public static final String DELIMITER = "_"; + + private final long minIndexCountPerBucket; + + private final long timeStepPerBucketSnapshotSegment; + + private final int maxNumBuckets; + + private final ManagedCursor cursor; + + public final BucketSnapshotStorage bucketSnapshotStorage; + + private long numberDelayedMessages; + + private final BucketState lastMutableBucketState; + + private final TripleLongPriorityQueue sharedBucketPriorityQueue; + + private final RangeMap<Long, BucketState> immutableBuckets; + + private final Table<Long, Long, BucketState> snapshotSegmentLastIndexTable; + + BucketDelayedDeliveryTracker(PersistentDispatcherMultipleConsumers dispatcher, + Timer timer, long tickTimeMillis, + boolean isDelayedDeliveryDeliverAtTimeStrict, + long fixedDelayDetectionLookahead, + BucketSnapshotStorage bucketSnapshotStorage, + long minIndexCountPerBucket, long timeStepPerBucketSnapshotSegment, + int maxNumBuckets) { + this(dispatcher, timer, tickTimeMillis, Clock.systemUTC(), isDelayedDeliveryDeliverAtTimeStrict, + fixedDelayDetectionLookahead, + bucketSnapshotStorage, minIndexCountPerBucket, timeStepPerBucketSnapshotSegment, maxNumBuckets); + } + + BucketDelayedDeliveryTracker(PersistentDispatcherMultipleConsumers dispatcher, + Timer timer, long tickTimeMillis, Clock clock, + boolean isDelayedDeliveryDeliverAtTimeStrict, + long fixedDelayDetectionLookahead, + BucketSnapshotStorage bucketSnapshotStorage, + long minIndexCountPerBucket, long timeStepPerBucketSnapshotSegment, + int maxNumBuckets) { + super(dispatcher, timer, tickTimeMillis, clock, isDelayedDeliveryDeliverAtTimeStrict, + fixedDelayDetectionLookahead); + this.minIndexCountPerBucket = minIndexCountPerBucket; + this.timeStepPerBucketSnapshotSegment = timeStepPerBucketSnapshotSegment; + this.maxNumBuckets = maxNumBuckets; + this.cursor = dispatcher.getCursor(); + this.sharedBucketPriorityQueue = new TripleLongPriorityQueue(); + this.immutableBuckets = TreeRangeMap.create(); + this.snapshotSegmentLastIndexTable = HashBasedTable.create(); + + this.bucketSnapshotStorage = bucketSnapshotStorage; + + this.numberDelayedMessages = 0L; + + this.lastMutableBucketState = new BucketState(-1L, -1L); + } + + private void moveScheduledMessageToSharedQueue(long cutoffTime) { + TripleLongPriorityQueue priorityQueue = getPriorityQueue(); + while (!priorityQueue.isEmpty()) { + long timestamp = priorityQueue.peekN1(); + if (timestamp > cutoffTime) { + break; + } + + long ledgerId = priorityQueue.peekN2(); + long entryId = priorityQueue.peekN3(); + sharedBucketPriorityQueue.add(timestamp, ledgerId, entryId); + + priorityQueue.pop(); + } + } + + @Override + public void run(Timeout timeout) throws Exception { + synchronized (this) { + moveScheduledMessageToSharedQueue(getCutoffTime()); + } + super.run(timeout); + } + + private Optional<BucketState> findBucket(long ledgerId) { + if (immutableBuckets.asMapOfRanges().isEmpty()) { + return Optional.empty(); + } + + Range<Long> span = immutableBuckets.span(); + if (!span.contains(ledgerId)) { + return Optional.empty(); + } + return Optional.ofNullable(immutableBuckets.get(ledgerId)); + } + + private Long getBucketId(BucketState bucketState) { + long bucketId = bucketState.getBucketId(); + if (bucketId != -1L) { + return bucketId; + } + + String bucketIdStr = cursor.getCursorProperties().get(bucketState.bucketKey()); + if (StringUtils.isBlank(bucketIdStr)) { + return -1L; + } + + bucketId = Long.parseLong(bucketIdStr); + bucketState.setBucketId(bucketId); + return bucketId; + } + + private BucketState createImmutableBucket(long startLedgerId, long endLedgerId) { + BucketState bucketState = new BucketState(startLedgerId, endLedgerId); + immutableBuckets.put(Range.closed(startLedgerId, endLedgerId), bucketState); + return bucketState; + } + + private CompletableFuture<Long> asyncSaveBucketSnapshot( + BucketState bucketState, SnapshotMetadata snapshotMetadata, + List<SnapshotSegment> bucketSnapshotSegments) { + + return bucketSnapshotStorage.createBucketSnapshot(snapshotMetadata, bucketSnapshotSegments) + .thenApply(newBucketId -> { + bucketState.setBucketId(newBucketId); + String bucketKey = bucketState.bucketKey(); + putBucketKeyId(bucketKey, newBucketId).exceptionally(ex -> { Review Comment: I won't make `putBucketKeyId` method asynchronous execution, when it failed the tracker can still continue to run. -- This is an automated message from the Apache Git Service. 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