anmolanmol1234 commented on code in PR #7272: URL: https://github.com/apache/hadoop/pull/7272#discussion_r1910186945
########## hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/services/AzureBlobBlockManager.java: ########## @@ -0,0 +1,191 @@ +/** + * 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.hadoop.fs.azurebfs.services; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.LinkedList; +import java.util.List; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import org.apache.hadoop.fs.azurebfs.contracts.exceptions.AzureBlobFileSystemException; +import org.apache.hadoop.fs.azurebfs.utils.TracingContext; +import org.apache.hadoop.fs.store.DataBlocks; + +/** + * Manages Azure Blob blocks for append operations. + */ +public class AzureBlobBlockManager extends AzureBlockManager { + + private static final Logger LOG = LoggerFactory.getLogger( + AbfsOutputStream.class); + + + /** The list of already committed blocks is stored in this list. */ + private List<String> committedBlockEntries = new ArrayList<>(); + + /** The list to store blockId, position, and status. */ + private final LinkedList<BlockEntry> blockEntryList = new LinkedList<>(); + + + /** + * Constructs an AzureBlobBlockManager. + * + * @param abfsOutputStream the output stream + * @param blockFactory the block factory + * @param bufferSize the buffer size + * @throws AzureBlobFileSystemException if an error occurs + */ + public AzureBlobBlockManager(AbfsOutputStream abfsOutputStream, + DataBlocks.BlockFactory blockFactory, + int bufferSize) + throws AzureBlobFileSystemException { + super(abfsOutputStream, blockFactory, bufferSize); + if (abfsOutputStream.getPosition() > 0 && !abfsOutputStream.isAppendBlob()) { + this.committedBlockEntries = getBlockList(abfsOutputStream.getTracingContext()); + } + LOG.debug("Created a new Blob Block Manager for AbfsOutputStream instance {} for path {}", + abfsOutputStream.getStreamID(), abfsOutputStream.getPath()); + } + + /** + * Creates a new block. + * + * @param position the position + * @return the created block + * @throws IOException if an I/O error occurs + */ + @Override + protected synchronized AbfsBlock createBlockInternal(long position) + throws IOException { + if (activeBlock == null) { + blockCount++; + activeBlock = new AbfsBlobBlock(abfsOutputStream, position); + activeBlock.setBlockEntry(addNewEntry(activeBlock.getBlockId(), activeBlock.getOffset())); + } + return activeBlock; + } + + /** + * Returns block id's which are committed for the blob. + * + * @param tracingContext Tracing context object. + * @return list of committed block id's. + * @throws AzureBlobFileSystemException if an error occurs + */ + private List<String> getBlockList(TracingContext tracingContext) + throws AzureBlobFileSystemException { + List<String> committedBlockIdList; + AbfsBlobClient blobClient = abfsOutputStream.getClientHandler().getBlobClient(); + final AbfsRestOperation op = blobClient + .getBlockList(abfsOutputStream.getPath(), tracingContext); + committedBlockIdList = op.getResult().getBlockIdList(); Review Comment: taken -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
