mike-tr-adamson commented on code in PR #2540: URL: https://github.com/apache/cassandra/pull/2540#discussion_r1288580024
########## src/java/org/apache/cassandra/index/sai/disk/v1/SkinnyRowAwarePrimaryKeyMap.java: ########## @@ -0,0 +1,184 @@ +/* + * 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.index.sai.disk.v1; + +import org.apache.cassandra.db.BufferDecoratedKey; +import org.apache.cassandra.db.Clustering; +import org.apache.cassandra.db.DecoratedKey; +import org.apache.cassandra.dht.IPartitioner; +import org.apache.cassandra.index.sai.disk.PrimaryKeyMap; +import org.apache.cassandra.index.sai.disk.format.IndexComponent; +import org.apache.cassandra.index.sai.disk.format.IndexDescriptor; +import org.apache.cassandra.index.sai.disk.v1.bitpack.BlockPackedReader; +import org.apache.cassandra.index.sai.disk.v1.bitpack.MonotonicBlockPackedReader; +import org.apache.cassandra.index.sai.disk.v1.bitpack.NumericValuesMeta; +import org.apache.cassandra.index.sai.disk.v1.sortedterms.SortedTermsMeta; +import org.apache.cassandra.index.sai.disk.v1.sortedterms.SortedTermsReader; +import org.apache.cassandra.index.sai.utils.PrimaryKey; +import org.apache.cassandra.io.sstable.format.SSTableReader; +import org.apache.cassandra.io.util.FileHandle; +import org.apache.cassandra.io.util.FileUtils; +import org.apache.cassandra.utils.Throwables; +import org.apache.cassandra.utils.bytecomparable.ByteComparable; +import org.apache.cassandra.utils.bytecomparable.ByteSource; +import org.apache.cassandra.utils.bytecomparable.ByteSourceInverse; + +import javax.annotation.concurrent.NotThreadSafe; +import javax.annotation.concurrent.ThreadSafe; +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.Arrays; + +/** + * A row-aware {@link PrimaryKeyMap} for skinny tables (those with no clustering columns). + * <p> + * This uses the following on-disk structures: + * <ul> + * <li>Block-packed structure for rowId to token lookups using {@link BlockPackedReader}. + * Uses component {@link IndexComponent#TOKEN_VALUES} </li> + * <li>A sorted-terms structure for rowId to {@link PrimaryKey} and {@link PrimaryKey} to rowId lookups using + * {@link SortedTermsReader}. Uses components {@link IndexComponent#PARTITION_KEY_BLOCKS} and + * {@link IndexComponent#PARTITION_KEY_BLOCK_OFFSETS}</li> + * </ul> + * + * While the {@link SkinnyRowAwarePrimaryKeyMapFactory} is threadsafe, individual instances of the {@link SkinnyRowAwarePrimaryKeyMap} + * are not. + */ +@NotThreadSafe +public class SkinnyRowAwarePrimaryKeyMap implements PrimaryKeyMap Review Comment: This sounds better. Some of the class names are getting verbose and we do only support row awareness. -- 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]
