mattisonchao commented on code in PR #19138: URL: https://github.com/apache/pulsar/pull/19138#discussion_r1068929892
########## pulsar-broker/src/main/java/org/apache/pulsar/broker/delayed/bucket/BucketDelayedDeliveryTracker.java: ########## @@ -243,6 +263,53 @@ public synchronized boolean addMessage(long ledgerId, long entryId, long deliver return true; } + private synchronized CompletableFuture<Void> asyncMergeBucketSnapshot() { + List<ImmutableBucket> values = immutableBuckets.asMapOfRanges().values().stream().toList(); + long minNumberMessages = Long.MAX_VALUE; + int minIndex = -1; + for (int i = 0; i + 1 < values.size(); i++) { + ImmutableBucket bucketL = values.get(i); + ImmutableBucket bucketR = values.get(i + 1); + long numberMessages = bucketL.numberBucketDelayedMessages + bucketR.numberBucketDelayedMessages; + if (numberMessages < minNumberMessages) { + minNumberMessages = (int) numberMessages; + minIndex = i; + } + } + return asyncMergeBucketSnapshot(values.get(minIndex), values.get(minIndex + 1)); + } + + private synchronized CompletableFuture<Void> asyncMergeBucketSnapshot(ImmutableBucket bucketA, + ImmutableBucket bucketB) { + immutableBuckets.remove(Range.closed(bucketA.startLedgerId, bucketA.endLedgerId)); + immutableBuckets.remove(Range.closed(bucketB.startLedgerId, bucketB.endLedgerId)); + + CompletableFuture<Long> snapshotCreateFutureA = + bucketA.getSnapshotCreateFuture().orElse(CompletableFuture.completedFuture(null)); + CompletableFuture<Long> snapshotCreateFutureB = + bucketB.getSnapshotCreateFuture().orElse(CompletableFuture.completedFuture(null)); + + return CompletableFuture.allOf(snapshotCreateFutureA, snapshotCreateFutureB).thenCompose(__ -> { + CompletableFuture<List<DelayedMessageIndexBucketSnapshotFormat.SnapshotSegment>> futureA = + bucketA.getRemainSnapshotSegment(); + CompletableFuture<List<DelayedMessageIndexBucketSnapshotFormat.SnapshotSegment>> futureB = + bucketB.getRemainSnapshotSegment(); + return futureA.thenCombine(futureB, CombinedSegmentDelayedIndexQueue::wrap) + .thenCompose(combinedDelayedIndexQueue -> { + CompletableFuture<Void> removeAFuture = bucketA.asyncDeleteBucketSnapshot(); + CompletableFuture<Void> removeBFuture = bucketB.asyncDeleteBucketSnapshot(); + + return CompletableFuture.allOf(removeAFuture, removeBFuture).thenRun(() -> { Review Comment: Questions: - When is the index rebuilt? - Should we unload the topic to rebuild the index if this operation fails? -- 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: commits-unsubscr...@pulsar.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org