mattisonchao commented on code in PR #17677: URL: https://github.com/apache/pulsar/pull/17677#discussion_r1051938857
########## pulsar-broker/src/main/java/org/apache/pulsar/broker/delayed/bucket/BookkeeperBucketSnapshotStorage.java: ########## @@ -0,0 +1,247 @@ +/* + * 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.bucket; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.Enumeration; +import java.util.List; +import java.util.Optional; +import java.util.concurrent.CompletableFuture; +import javax.validation.constraints.NotNull; +import org.apache.bookkeeper.client.BKException; +import org.apache.bookkeeper.client.BookKeeper; +import org.apache.bookkeeper.client.LedgerEntry; +import org.apache.bookkeeper.client.LedgerHandle; +import org.apache.pulsar.broker.PulsarService; +import org.apache.pulsar.broker.ServiceConfiguration; +import org.apache.pulsar.broker.delayed.proto.DelayedMessageIndexBucketSnapshotFormat.SnapshotMetadata; +import org.apache.pulsar.broker.delayed.proto.DelayedMessageIndexBucketSnapshotFormat.SnapshotSegment; +import org.apache.pulsar.common.util.FutureUtil; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class BookkeeperBucketSnapshotStorage implements BucketSnapshotStorage { + + private static final Logger log = LoggerFactory.getLogger(BookkeeperBucketSnapshotStorage.class); + private static final byte[] LedgerPassword = "".getBytes(); + + private final PulsarService pulsar; + private final ServiceConfiguration config; + private BookKeeper bookKeeper; + + public BookkeeperBucketSnapshotStorage(PulsarService pulsar) { + this.pulsar = pulsar; + this.config = pulsar.getConfig(); + } + + @Override + public CompletableFuture<Long> createBucketSnapshot(SnapshotMetadata snapshotMetadata, + List<SnapshotSegment> bucketSnapshotSegments) { + return createLedger() + .thenCompose(ledgerHandle -> addEntry(ledgerHandle, snapshotMetadata.toByteArray()) + .thenApply(__ -> ledgerHandle)) + .thenCompose(ledgerHandle -> addSnapshotSegments(ledgerHandle, bucketSnapshotSegments) + .thenApply(__ -> ledgerHandle)) + .thenCompose(ledgerHandle -> closeLedger(ledgerHandle) + .thenApply(__ -> ledgerHandle.getId())); + } + + @Override + public CompletableFuture<SnapshotMetadata> getBucketSnapshotMetadata(long bucketId) { + return openLedger(bucketId).thenCompose( + ledgerHandle -> getLedgerEntryThenCloseLedger(ledgerHandle, 0, 0). + thenCompose( + entryEnumeration -> parseSnapshotMetadataEntry(entryEnumeration.nextElement()))); + } + + @Override + public CompletableFuture<List<SnapshotSegment>> getBucketSnapshotSegment(long bucketId, long firstSegmentEntryId, + long lastSegmentEntryId) { + return openLedger(bucketId).thenCompose( + ledgerHandle -> getLedgerEntryThenCloseLedger(ledgerHandle, firstSegmentEntryId, lastSegmentEntryId).thenCompose( + this::parseSnapshotSegmentEntries)); + } + + @Override + public CompletableFuture<Long> getBucketSnapshotLength(long bucketId) { + return openLedger(bucketId).thenApply(ledgerHandle -> { + long length = ledgerHandle.getLength(); + closeLedger(ledgerHandle); + return length; + }); + } + + @Override + public CompletableFuture<Void> deleteBucketSnapshot(long bucketId) { + return deleteLedger(bucketId); + } + + @Override + public void start() throws Exception { + pulsar.getBookKeeperClient(); + this.bookKeeper = pulsar.getBookKeeperClientFactory().create( + pulsar.getConfiguration(), + pulsar.getLocalMetadataStore(), + pulsar.getIoEventLoopGroup(), + Optional.empty(), + null + ); + } + + @Override + public void close() throws Exception { + if (bookKeeper != null) { + bookKeeper.close(); + } + } + + private CompletableFuture<Void> addSnapshotSegments(LedgerHandle ledgerHandle, + List<SnapshotSegment> bucketSnapshotSegments) { + List<CompletableFuture<Void>> addFutures = new ArrayList<>(); + for (SnapshotSegment bucketSnapshotSegment : bucketSnapshotSegments) { + addFutures.add(addEntry(ledgerHandle, bucketSnapshotSegment.toByteArray())); + } + + return FutureUtil.waitForAll(addFutures); + } + + private CompletableFuture<SnapshotMetadata> parseSnapshotMetadataEntry(LedgerEntry ledgerEntry) { + CompletableFuture<SnapshotMetadata> result = new CompletableFuture<>(); + try { + result.complete(SnapshotMetadata.parseFrom(ledgerEntry.getEntry())); + } catch (IOException e) { + result.completeExceptionally(e); + } + return result; + } + + private CompletableFuture<List<SnapshotSegment>> parseSnapshotSegmentEntries( + Enumeration<LedgerEntry> entryEnumeration) { + CompletableFuture<List<SnapshotSegment>> result = new CompletableFuture<>(); + List<SnapshotSegment> snapshotMetadataList = new ArrayList<>(); + try { + while (entryEnumeration.hasMoreElements()) { + LedgerEntry ledgerEntry = entryEnumeration.nextElement(); + snapshotMetadataList.add(SnapshotSegment.parseFrom(ledgerEntry.getEntry())); + } + result.complete(snapshotMetadataList); + } catch (IOException e) { + result.completeExceptionally(e); + } + return result; + } + + @NotNull + private CompletableFuture<LedgerHandle> createLedger() { + CompletableFuture<LedgerHandle> future = new CompletableFuture<>(); + bookKeeper.asyncCreateLedger( + config.getManagedLedgerDefaultEnsembleSize(), + config.getManagedLedgerDefaultWriteQuorum(), + config.getManagedLedgerDefaultAckQuorum(), + BookKeeper.DigestType.fromApiDigestType(config.getManagedLedgerDigestType()), + LedgerPassword, + (rc, handle, ctx) -> { + if (rc != BKException.Code.OK) { + future.completeExceptionally(bkException("Failed to create ledger", rc, -1)); + } else { + future.complete(handle); + } + }, null, null); + return future; + } + + private CompletableFuture<LedgerHandle> openLedger(Long ledgerId) { + final CompletableFuture<LedgerHandle> future = new CompletableFuture<>(); + bookKeeper.asyncOpenLedger( + ledgerId, + BookKeeper.DigestType.fromApiDigestType(config.getManagedLedgerDigestType()), + LedgerPassword, + (rc, handle, ctx) -> { + if (rc != BKException.Code.OK) { + future.completeExceptionally(bkException("Failed to open ledger", rc, ledgerId)); + } else { + future.complete(handle); + } + }, null + ); + return future; + } + + private CompletableFuture<Void> closeLedger(LedgerHandle ledgerHandle) { + CompletableFuture<Void> future = new CompletableFuture<>(); + ledgerHandle.asyncClose((rc, handle, ctx) -> { + if (rc != BKException.Code.OK) { + log.warn("Failed to close a Ledger Handle: {}", ledgerHandle.getId()); + future.completeExceptionally(bkException("Failed to close ledger", rc, ledgerHandle.getId())); + } else { + future.complete(null); + } + }, null); + return future; + } + + private CompletableFuture<Void> addEntry(LedgerHandle ledgerHandle, byte[] data) { + final CompletableFuture<Void> future = new CompletableFuture<>(); + ledgerHandle.asyncAddEntry(data, + (rc, handle, entryId, ctx) -> { + if (rc != BKException.Code.OK) { + future.completeExceptionally(bkException("Failed to add entry", rc, ledgerHandle.getId())); + } else { + future.complete(null); + } + }, null + ); + return future; + } + + CompletableFuture<Enumeration<LedgerEntry>> getLedgerEntryThenCloseLedger(LedgerHandle ledger, + long firstEntryId, long lastEntryId) { + final CompletableFuture<Enumeration<LedgerEntry>> future = new CompletableFuture<>(); + ledger.asyncReadEntries(firstEntryId, lastEntryId, + (rc, handle, entries, ctx) -> { + if (rc != BKException.Code.OK) { + future.completeExceptionally(bkException("Failed to read entry", rc, ledger.getId())); + } else { + future.complete(entries); + } + closeLedger(handle); Review Comment: I still have concerns here, we call this method `getLedgerEntryThenCloseLedger`, but we don't ensure the ledger is closed after this method is returned. -- This is an automated message from the Apache Git Service. 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