| /* |
| * 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.compaction; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static org.apache.pulsar.compaction.CompactedTopicImpl.COMPACT_LEDGER_EMPTY; |
| import static org.apache.pulsar.compaction.CompactedTopicImpl.NEWER_THAN_COMPACTED; |
| import static org.apache.pulsar.compaction.CompactedTopicImpl.findStartPoint; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.NoSuchElementException; |
| import java.util.Objects; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.function.Supplier; |
| import javax.annotation.Nonnull; |
| import org.apache.bookkeeper.client.BookKeeper; |
| import org.apache.bookkeeper.mledger.Entry; |
| import org.apache.bookkeeper.mledger.Position; |
| import org.apache.bookkeeper.mledger.impl.PositionImpl; |
| import org.apache.pulsar.common.util.FutureUtil; |
| |
| |
| public class PulsarTopicCompactionService implements TopicCompactionService { |
| |
| private final String topic; |
| |
| private final CompactedTopicImpl compactedTopic; |
| |
| private final Supplier<Compactor> compactorSupplier; |
| |
| public PulsarTopicCompactionService(String topic, BookKeeper bookKeeper, |
| Supplier<Compactor> compactorSupplier) { |
| this.topic = topic; |
| this.compactedTopic = new CompactedTopicImpl(bookKeeper); |
| this.compactorSupplier = compactorSupplier; |
| } |
| |
| @Override |
| public CompletableFuture<Void> compact() { |
| Compactor compactor; |
| try { |
| compactor = compactorSupplier.get(); |
| } catch (Throwable e) { |
| return CompletableFuture.failedFuture(e); |
| } |
| return compactor.compact(topic).thenApply(x -> null); |
| } |
| |
| @Override |
| public CompletableFuture<List<Entry>> readCompactedEntries(@Nonnull Position startPosition, |
| int numberOfEntriesToRead) { |
| Objects.requireNonNull(startPosition); |
| checkArgument(numberOfEntriesToRead > 0); |
| |
| CompletableFuture<List<Entry>> resultFuture = new CompletableFuture<>(); |
| |
| Objects.requireNonNull(compactedTopic.getCompactedTopicContextFuture()).thenCompose( |
| (context) -> findStartPoint((PositionImpl) startPosition, context.ledger.getLastAddConfirmed(), |
| context.cache).thenCompose((startPoint) -> { |
| if (startPoint == COMPACT_LEDGER_EMPTY || startPoint == NEWER_THAN_COMPACTED) { |
| return CompletableFuture.completedFuture(Collections.emptyList()); |
| } |
| long endPoint = |
| Math.min(context.ledger.getLastAddConfirmed(), startPoint + numberOfEntriesToRead); |
| return CompactedTopicImpl.readEntries(context.ledger, startPoint, endPoint); |
| })).whenComplete((result, ex) -> { |
| if (ex == null) { |
| resultFuture.complete(result); |
| } else { |
| ex = FutureUtil.unwrapCompletionException(ex); |
| if (ex instanceof NoSuchElementException) { |
| resultFuture.complete(Collections.emptyList()); |
| } else { |
| resultFuture.completeExceptionally(ex); |
| } |
| } |
| }); |
| |
| return resultFuture; |
| } |
| |
| @Override |
| public CompletableFuture<Entry> readLastCompactedEntry() { |
| return compactedTopic.readLastEntryOfCompactedLedger(); |
| } |
| |
| @Override |
| public CompletableFuture<Position> getLastCompactedPosition() { |
| return CompletableFuture.completedFuture(compactedTopic.getCompactionHorizon().orElse(null)); |
| } |
| |
| public CompactedTopicImpl getCompactedTopic() { |
| return compactedTopic; |
| } |
| } |