lizhimins commented on code in PR #937: URL: https://github.com/apache/rocketmq-externals/pull/937#discussion_r1872964950
########## rocketmq-tieredstore-s3/src/main/java/org/apache/rocketmq/tieredstore/s3/S3FileSegment.java: ########## @@ -0,0 +1,568 @@ +/* + * 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.rocketmq.tieredstore.s3; + +import com.alibaba.fastjson.JSON; +import io.netty.buffer.ByteBuf; +import io.netty.buffer.CompositeByteBuf; +import io.netty.buffer.Unpooled; +import io.netty.util.ReferenceCountUtil; +import io.opentelemetry.api.common.Attributes; +import java.nio.ByteBuffer; +import java.util.ArrayList; +import java.util.Collections; +import java.util.Comparator; +import java.util.List; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.atomic.AtomicBoolean; +import org.apache.rocketmq.tieredstore.MessageStoreConfig; +import org.apache.rocketmq.tieredstore.common.FileSegmentType; +import org.apache.rocketmq.tieredstore.exception.TieredStoreErrorCode; +import org.apache.rocketmq.tieredstore.exception.TieredStoreException; +import org.apache.rocketmq.tieredstore.metrics.TieredStoreMetricsManager; +import org.apache.rocketmq.tieredstore.provider.FileSegment; +import org.apache.rocketmq.tieredstore.s3.metadata.S3ChunkMetadata; +import org.apache.rocketmq.tieredstore.s3.metadata.S3FileSegmentMetadata; +import org.apache.rocketmq.tieredstore.s3.object.AbstractS3Storage; +import org.apache.rocketmq.tieredstore.s3.object.S3Storage; +import org.apache.rocketmq.tieredstore.s3.object.bytebuf.ByteBufAlloc; +import org.apache.rocketmq.tieredstore.s3.util.S3PathUtils; +import org.apache.rocketmq.tieredstore.stream.FileSegmentInputStream; +import org.apache.rocketmq.tieredstore.util.MessageStoreUtil; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import static org.apache.rocketmq.tieredstore.metrics.TieredStoreMetricsConstant.LABEL_FILE_TYPE; +import static org.apache.rocketmq.tieredstore.metrics.TieredStoreMetricsConstant.LABEL_PATH; +import static org.apache.rocketmq.tieredstore.s3.constants.S3Constants.MIN_PART_SIZE; +import static org.apache.rocketmq.tieredstore.util.MessageFormatUtil.CONSUME_QUEUE_UNIT_SIZE; + +public class S3FileSegment extends FileSegment { + + private static final Logger log = LoggerFactory.getLogger(MessageStoreUtil.TIERED_STORE_LOGGER_NAME); + + private final String basePath; + + /** + * The path of the chunk file in S3. Format: + * <pre> + * {@link #filePath}/chunk + * </pre> + */ + private final String chunkPath; + + /** + * The path of the segment file in S3. Format: + * <pre> + * {@link #filePath}/segment + * </pre> + */ + private final String segmentPath; + + private final TieredS3Storage s3Storage; + + private final S3FileSegmentMetadata metadata; + + private final boolean isObjectMergeEnable = false; + + private final AtomicBoolean compactStatus = new AtomicBoolean(false); + + private final Attributes attributes = TieredStoreMetricsManager.newAttributesBuilder().put(LABEL_PATH, filePath) + .put(LABEL_FILE_TYPE, this.fileType.name().toLowerCase()).build(); + + public S3FileSegment(MessageStoreConfig storeConfig, + FileSegmentType fileType, String filePath, long baseOffset) { + super(storeConfig, fileType, filePath, baseOffset); + + // fullPath: clusterBasePath/broker/topic/queueId/fileType/seg-${baseOffset} + String clusterName = storeConfig.getBrokerClusterName(); + String clusterBasePath = String.format("%s_%s", MessageStoreUtil.getHash(clusterName), clusterName); + this.basePath = clusterBasePath + S3PathUtils.FILE_SEPARATOR + filePath + S3PathUtils.FILE_SEPARATOR + + fileType.toString() + S3PathUtils.FILE_SEPARATOR + "seg-" + baseOffset; + this.chunkPath = S3PathUtils.getBaseChunkPath(basePath); + this.segmentPath = S3PathUtils.getBaseSegmentPath(basePath); + this.s3Storage = TieredS3Storage.getInstance(storeConfig); + this.metadata = new S3FileSegmentMetadata(); + this.initialize(); + } + + private void initialize() { + + S3Storage.ObjectInfo segmentObjectHeader = s3Storage.readHeader(S3PathUtils.getSegmentPath(segmentPath)).join(); + if (segmentObjectHeader != null) { + this.metadata.setSegment( + new S3ChunkMetadata(0, (int) segmentObjectHeader.size(), true)); + return; + } + + S3Storage.ObjectInfo chunkZeroObjectHeader = s3Storage.readHeader(S3PathUtils.getChunkPathByPosition(chunkPath, 0)).join(); + // if chunk start position equal 0, means new file + if (chunkZeroObjectHeader == null) { + log.info("create new S3FileSegment {}", basePath); + return; + } + + CompletableFuture<List<S3ChunkMetadata>> listChunks = this.s3Storage.listChunks(this.chunkPath); + List<S3ChunkMetadata> chunks = listChunks.join(); + // add all chunks into metadata + checkAndLoadChunks(chunks); + if (log.isDebugEnabled()) { + log.debug("init file segment metadata successfully. path: {} meta: {}", basePath, JSON.toJSONString(this.metadata)); + } + + log.info("init file segment metadata successfully. path: {}", basePath); + + } + + private void checkAndLoadChunks(List<S3ChunkMetadata> chunks) { + if (chunks.size() == 0) { + return; + } + for (S3ChunkMetadata chunk : chunks) { + S3ChunkMetadata newChunk = + new S3ChunkMetadata(chunk.getStartPosition(), + chunk.getChunkSize(), false); + if (!this.metadata.addChunk(newChunk)) { + // the chunk is not valid + log.error("Check and load chunks failed, the path {} the chunk: {} is not valid, now chunks last end position: {}, please check it.", + basePath, newChunk, + this.metadata.getEndPosition()); + throw new RuntimeException( + "The chunk: " + chunk + " is not valid, now chunks last end position: " + this.metadata.getEndPosition() + ", please check it."); + } + } + } + + @Override + public String getPath() { + return this.filePath; + } + + @Override + public long getSize() { + return this.metadata.getSize(); + } + + @Override + public boolean exists() { + return this.metadata.getSize() > 0; + } + + @Override + public void createFile() { Review Comment: 留这个函数当时是考虑到两阶段写的问题，会先写一个 length=0 的 meta，然后 append 成功更新这个 meta -- This is an automated message from the Apache Git Service. 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