Renkai commented on a change in pull request #9096: URL: https://github.com/apache/pulsar/pull/9096#discussion_r560247295
########## File path: tiered-storage/jcloud/src/main/java/org/apache/bookkeeper/mledger/offload/jcloud/impl/StreamingBlobStoreBackedReadHandleImpl.java ########## @@ -0,0 +1,283 @@ +/** + * 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.bookkeeper.mledger.offload.jcloud.impl; + +import com.google.common.base.Preconditions; +import io.netty.buffer.ByteBuf; +import java.io.DataInputStream; +import java.io.IOException; +import java.util.ArrayList; +import java.util.LinkedList; +import java.util.List; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.ScheduledExecutorService; +import lombok.val; +import org.apache.bookkeeper.client.BKException; +import org.apache.bookkeeper.client.api.LastConfirmedAndEntry; +import org.apache.bookkeeper.client.api.LedgerEntries; +import org.apache.bookkeeper.client.api.LedgerEntry; +import org.apache.bookkeeper.client.api.LedgerMetadata; +import org.apache.bookkeeper.client.api.ReadHandle; +import org.apache.bookkeeper.client.impl.LedgerEntriesImpl; +import org.apache.bookkeeper.client.impl.LedgerEntryImpl; +import org.apache.bookkeeper.mledger.offload.jcloud.BackedInputStream; +import org.apache.bookkeeper.mledger.offload.jcloud.StreamingOffloadIndexBlock; +import org.apache.bookkeeper.mledger.offload.jcloud.StreamingOffloadIndexBlockBuilder; +import org.apache.bookkeeper.mledger.offload.jcloud.impl.DataBlockUtils.VersionCheck; +import org.apache.pulsar.common.allocator.PulsarByteBufAllocator; +import org.jclouds.blobstore.BlobStore; +import org.jclouds.blobstore.domain.Blob; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class StreamingBlobStoreBackedReadHandleImpl implements ReadHandle { + private static final Logger log = LoggerFactory.getLogger(StreamingBlobStoreBackedReadHandleImpl.class); + + private final long ledgerId; + private final List<StreamingOffloadIndexBlock> indices; + private final List<BackedInputStream> inputStreams; + private final List<DataInputStream> dataStreams; + private final ExecutorService executor; + + static class GroupedReader { + long ledgerId; + long firstEntry; + long lastEntry; + StreamingOffloadIndexBlock index; + BackedInputStream inputStream; + DataInputStream dataStream; + + public GroupedReader(long ledgerId, long firstEntry, long lastEntry, + StreamingOffloadIndexBlock index, + BackedInputStream inputStream, DataInputStream dataStream) { + this.ledgerId = ledgerId; + this.firstEntry = firstEntry; + this.lastEntry = lastEntry; + this.index = index; + this.inputStream = inputStream; + this.dataStream = dataStream; + } + } + + private StreamingBlobStoreBackedReadHandleImpl(long ledgerId, List<StreamingOffloadIndexBlock> indices, + List<BackedInputStream> inputStreams, + ExecutorService executor) { + this.ledgerId = ledgerId; + this.indices = indices; + this.inputStreams = inputStreams; + this.dataStreams = new LinkedList<>(); + for (BackedInputStream inputStream : inputStreams) { + dataStreams.add(new DataInputStream(inputStream)); + } + this.executor = executor; + } + + @Override + public long getId() { + return ledgerId; + } + + @Override + public LedgerMetadata getLedgerMetadata() { + return indices.get(0).getLedgerMetadata(ledgerId); + } + + @Override + public CompletableFuture<Void> closeAsync() { + CompletableFuture<Void> promise = new CompletableFuture<>(); + executor.submit(() -> { + try { + for (StreamingOffloadIndexBlock indexBlock : indices) { + indexBlock.close(); + } + for (BackedInputStream inputStream : inputStreams) { + inputStream.close(); + } + promise.complete(null); + } catch (IOException t) { + promise.completeExceptionally(t); + } + }); + return promise; + } + + @Override + public CompletableFuture<LedgerEntries> readAsync(long firstEntry, long lastEntry) { + log.debug("Ledger {}: reading {} - {}", getId(), firstEntry, lastEntry); + CompletableFuture<LedgerEntries> promise = new CompletableFuture<>(); + if (firstEntry > lastEntry + || firstEntry < 0 + || lastEntry > getLastAddConfirmed()) { + promise.completeExceptionally(new BKException.BKIncorrectParameterException()); + return promise; + } + executor.submit(() -> { + List<LedgerEntry> entries = new ArrayList<LedgerEntry>(); + List<GroupedReader> groupedReaders = null; + try { + groupedReaders = getGroupedReader(firstEntry, lastEntry); + } catch (Exception e) { + promise.completeExceptionally(e); + return; + } + + for (GroupedReader groupedReader : groupedReaders) { Review comment: double confirm code added ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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