lukasz-antoniak commented on code in PR #131: URL: https://github.com/apache/cassandra-analytics/pull/131#discussion_r2270412500
########## cassandra-five-zero-bridge/src/main/java/org/apache/cassandra/spark/reader/ReaderUtils.java: ########## @@ -0,0 +1,623 @@ +/* + * 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.cassandra.spark.reader; + +import java.io.DataInputStream; +import java.io.EOFException; +import java.io.FileNotFoundException; +import java.io.IOException; +import java.io.InputStream; +import java.lang.reflect.Constructor; +import java.lang.reflect.InvocationTargetException; +import java.nio.ByteBuffer; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.EnumMap; +import java.util.EnumSet; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import java.util.function.Function; +import java.util.stream.Collectors; +import java.util.zip.CRC32; + +import com.google.common.annotations.VisibleForTesting; +import com.google.common.primitives.Ints; + +import org.apache.cassandra.db.Clustering; +import org.apache.cassandra.db.ClusteringPrefix; +import org.apache.cassandra.db.DecoratedKey; +import org.apache.cassandra.db.SerializationHeader; +import org.apache.cassandra.db.marshal.AbstractType; +import org.apache.cassandra.db.marshal.ByteBufferAccessor; +import org.apache.cassandra.db.marshal.CompositeType; +import org.apache.cassandra.db.marshal.TypeParser; +import org.apache.cassandra.db.marshal.UTF8Type; +import org.apache.cassandra.db.rows.EncodingStats; +import org.apache.cassandra.dht.IPartitioner; +import org.apache.cassandra.io.sstable.CorruptSSTableException; +import org.apache.cassandra.io.sstable.Descriptor; +import org.apache.cassandra.io.sstable.format.SSTableFormat; +import org.apache.cassandra.io.sstable.format.Version; +import org.apache.cassandra.io.sstable.metadata.MetadataComponent; +import org.apache.cassandra.io.sstable.metadata.MetadataType; +import org.apache.cassandra.io.sstable.metadata.ValidationMetadata; +import org.apache.cassandra.io.util.DataInputBuffer; +import org.apache.cassandra.io.util.DataInputPlus; +import org.apache.cassandra.io.util.RebufferingChannelInputStream; +import org.apache.cassandra.io.util.File; +import org.apache.cassandra.schema.TableMetadata; +import org.apache.cassandra.spark.data.SSTable; +import org.apache.cassandra.spark.sparksql.filters.PartitionKeyFilter; +import org.apache.cassandra.spark.utils.ByteBufferUtils; +import org.apache.cassandra.spark.utils.Pair; +import org.apache.cassandra.spark.utils.streaming.BufferingInputStream; +import org.apache.cassandra.utils.BloomFilter; +import org.apache.cassandra.utils.BloomFilterSerializer; +import org.apache.cassandra.utils.ByteBufferUtil; +import org.apache.cassandra.utils.TokenUtils; +import org.apache.cassandra.utils.vint.VIntCoding; +import org.jetbrains.annotations.NotNull; +import org.jetbrains.annotations.Nullable; + +import static org.apache.cassandra.utils.FBUtilities.updateChecksumInt; + +@SuppressWarnings("WeakerAccess") +public final class ReaderUtils extends TokenUtils +{ + private static final int CHECKSUM_LENGTH = 4; // CRC32 + private static final Constructor<?> SERIALIZATION_HEADER = + Arrays.stream(SerializationHeader.Component.class.getDeclaredConstructors()) + .filter(constructor -> constructor.getParameterCount() == 5) + .findFirst() + .orElseThrow(() -> new RuntimeException("Could not find SerializationHeader.Component constructor")); + public static final ByteBuffer SUPER_COLUMN_MAP_COLUMN = ByteBufferUtil.EMPTY_BYTE_BUFFER; + + public static Descriptor constructDescriptor(@NotNull String keyspace, @NotNull String table, @NotNull SSTable ssTable) + { + File file = ReaderUtils.constructFilename(keyspace, table, ssTable.getDataFileName()); + return Descriptor.fromFile(file); + } + + /** + * Constructs full file path for a given combination of keyspace, table, and data file name, + * while adjusting for data files with non-standard names prefixed with keyspace and table + * + * @param keyspace Name of the keyspace + * @param table Name of the table + * @param filename Name of the data file + * @return A full file path, adjusted for non-standard file names + */ + @VisibleForTesting + @NotNull + public static File constructFilename(@NotNull String keyspace, @NotNull String table, @NotNull String filename) + { + String[] components = filename.split("-"); + if (components.length == 6 + && components[0].equals(keyspace) + && components[1].equals(table)) + { + filename = filename.substring(keyspace.length() + table.length() + 2); + } + + return new File(String.format("./%s/%s", keyspace, table), filename); + } + + static + { + SERIALIZATION_HEADER.setAccessible(true); + } + + private ReaderUtils() + { + super(); + throw new IllegalStateException(getClass() + " is static utility class and shall not be instantiated"); + } + + static ByteBuffer encodeCellName(TableMetadata metadata, + ClusteringPrefix clustering, + ByteBuffer columnName, + ByteBuffer collectionElement) + { + boolean isStatic = clustering == Clustering.STATIC_CLUSTERING; + + if (!TableMetadata.Flag.isCompound(metadata.flags)) + { + if (isStatic) + { + return columnName; + } + + assert clustering.size() == 1 : "Expected clustering size to be 1, but was " + clustering.size(); + return clustering.bufferAt(0); + } + + // We use comparator.size() rather than clustering.size() because of static clusterings + int clusteringSize = metadata.comparator.size(); + int size = clusteringSize + (TableMetadata.Flag.isDense(metadata.flags) ? 0 : 1) + + (collectionElement == null ? 0 : 1); + if (TableMetadata.Flag.isSuper(metadata.flags)) + { + size = clusteringSize + 1; + } + + ByteBuffer[] values = new ByteBuffer[size]; + for (int index = 0; index < clusteringSize; index++) + { + if (isStatic) + { + values[index] = ByteBufferUtil.EMPTY_BYTE_BUFFER; + continue; + } + + ByteBuffer value = clustering.bufferAt(index); + // We can have null (only for dense compound tables for backward compatibility reasons), + // but that means we're done and should stop there as far as building the composite is concerned + if (value == null) + { + return CompositeType.build(ByteBufferAccessor.instance, Arrays.copyOfRange(values, 0, index)); + } + + values[index] = value; + } + + if (TableMetadata.Flag.isSuper(metadata.flags)) + { + // We need to set the "column" (in thrift terms) name, i.e. the value corresponding to the subcomparator. + // What it is depends on whether this is a cell for a declared "static" column + // or a "dynamic" column part of the super-column internal map. + assert columnName != null; // This should never be null for supercolumns, see decodeForSuperColumn() above + values[clusteringSize] = columnName.equals(SUPER_COLUMN_MAP_COLUMN) + ? collectionElement + : columnName; + } + else + { + if (!TableMetadata.Flag.isDense(metadata.flags)) + { + values[clusteringSize] = columnName; + } + if (collectionElement != null) + { + values[clusteringSize + 1] = collectionElement; + } + } + + return CompositeType.build(ByteBufferAccessor.instance, isStatic, values); + } + + @Nullable + public static Pair<DecoratedKey, DecoratedKey> keysFromIndex(@NotNull TableMetadata metadata, + @NotNull SSTable ssTable) throws IOException + { + return keysFromIndex(metadata.partitioner, ssTable); + } + + @Nullable + public static Pair<DecoratedKey, DecoratedKey> keysFromIndex(@NotNull IPartitioner partitioner, + @NotNull SSTable ssTable) throws IOException + { + try (InputStream primaryIndex = ssTable.openPrimaryIndexStream()) + { + if (primaryIndex != null) + { + Pair<ByteBuffer, ByteBuffer> keys = primaryIndexReadFirstAndLastKey(primaryIndex); + return Pair.of(partitioner.decorateKey(keys.left), partitioner.decorateKey(keys.right)); + } + } + return null; + } + + public static boolean anyFilterKeyInIndex(@NotNull SSTable ssTable, + @NotNull List<PartitionKeyFilter> filters) throws IOException + { + if (filters.isEmpty()) + { + return false; + } + + try (InputStream primaryIndex = ssTable.openPrimaryIndexStream()) + { + if (primaryIndex != null) + { + return primaryIndexContainsAnyKey(primaryIndex, filters); + } + } + + return true; // could not read primary index, so to be safe assume it contains the keys + } + + public static Map<MetadataType, MetadataComponent> deserializeStatsMetadata(String keyspace, + String table, + SSTable ssTable, + EnumSet<MetadataType> selectedTypes) throws IOException + { + return deserializeStatsMetadata(ssTable, selectedTypes, constructDescriptor(keyspace, table, ssTable)); + } + + public static Map<MetadataType, MetadataComponent> deserializeStatsMetadata(SSTable ssTable, + Descriptor descriptor) throws IOException + { + return deserializeStatsMetadata(ssTable, + EnumSet.of(MetadataType.VALIDATION, MetadataType.STATS, MetadataType.HEADER), + descriptor); + } + + public static Map<MetadataType, MetadataComponent> deserializeStatsMetadata(SSTable ssTable, + EnumSet<MetadataType> selectedTypes, + Descriptor descriptor) throws IOException + { + try (InputStream statsStream = ssTable.openStatsStream()) + { + return deserializeStatsMetadata(statsStream, + selectedTypes, + descriptor); + } + } + + /** + * Deserialize Statistics.db file to pull out metadata components needed for SSTable deserialization + * + * @param is input stream for Statistics.db file + * @param selectedTypes enum of MetadataType to deserialize + * @param descriptor SSTable file descriptor + * @return map of MetadataComponent for each requested MetadataType + * @throws IOException + */ + static Map<MetadataType, MetadataComponent> deserializeStatsMetadata(InputStream is, + EnumSet<MetadataType> selectedTypes, + Descriptor descriptor) throws IOException + { + DataInputStream in = new DataInputStream(is); // Cassandra 4.x vs 5.x Review Comment: Done. -- This is an automated message from the Apache Git Service. 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