| /* |
| * 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.io.sstable.format.bti; |
| |
| import java.io.IOException; |
| |
| import org.apache.cassandra.db.DeletionTime; |
| import org.apache.cassandra.io.sstable.AbstractRowIndexEntry; |
| import org.apache.cassandra.io.sstable.format.SSTableFormat; |
| import org.apache.cassandra.io.util.DataInputPlus; |
| import org.apache.cassandra.io.util.DataOutputPlus; |
| |
| /** |
| * Index entry for the BTI partition index. This can be a simple position in the data file, or an entry in the row |
| * index file where the rows are indexed in blocks (see {@link RowIndexReader}). |
| */ |
| final class TrieIndexEntry extends AbstractRowIndexEntry |
| { |
| final long indexTrieRoot; |
| private final int rowIndexBlockCount; |
| private final DeletionTime deletionTime; |
| |
| TrieIndexEntry(long dataFilePosition, long indexTrieRoot, int rowIndexBlockCount, DeletionTime deletionTime) |
| { |
| super(dataFilePosition); |
| this.indexTrieRoot = indexTrieRoot; |
| this.rowIndexBlockCount = rowIndexBlockCount; |
| this.deletionTime = deletionTime; |
| } |
| |
| public TrieIndexEntry(long position) |
| { |
| super(position); |
| this.indexTrieRoot = -1; |
| this.rowIndexBlockCount = 0; |
| this.deletionTime = null; |
| } |
| |
| @Override |
| public int blockCount() |
| { |
| return rowIndexBlockCount; |
| } |
| |
| @Override |
| public SSTableFormat<?, ?> getSSTableFormat() |
| { |
| throw noKeyCacheError(); |
| } |
| |
| @Override |
| public void serializeForCache(DataOutputPlus out) |
| { |
| throw noKeyCacheError(); |
| } |
| |
| private static AssertionError noKeyCacheError() |
| { |
| return new AssertionError("BTI SSTables should not use key cache"); |
| } |
| |
| @Override |
| public DeletionTime deletionTime() |
| { |
| return deletionTime; |
| } |
| |
| @Override |
| public long unsharedHeapSize() |
| { |
| throw new AssertionError("BTI SSTables index entries should not be persisted in any in-memory structure"); |
| } |
| |
| public void serialize(DataOutputPlus indexFile, long basePosition) throws IOException |
| { |
| assert indexTrieRoot != -1 && rowIndexBlockCount > 0 && deletionTime != null; |
| indexFile.writeUnsignedVInt(position); |
| indexFile.writeVInt(indexTrieRoot - basePosition); |
| indexFile.writeUnsignedVInt32(rowIndexBlockCount); |
| DeletionTime.serializer.serialize(deletionTime, indexFile); |
| } |
| |
| /** |
| * Create an index entry. The row index trie must already have been written (by RowIndexWriter) to the row index |
| * file and its root position must be specified in trieRoot. |
| */ |
| public static TrieIndexEntry create(long dataStartPosition, |
| long trieRoot, |
| DeletionTime partitionLevelDeletion, |
| int rowIndexBlockCount) |
| { |
| return new TrieIndexEntry(dataStartPosition, trieRoot, trieRoot == -1 ? 0 : rowIndexBlockCount, partitionLevelDeletion); |
| } |
| |
| public static TrieIndexEntry deserialize(DataInputPlus in, long basePosition) throws IOException |
| { |
| long dataFilePosition = in.readUnsignedVInt(); |
| long indexTrieRoot = in.readVInt() + basePosition; |
| int rowIndexBlockCount = in.readUnsignedVInt32(); |
| DeletionTime deletionTime = DeletionTime.serializer.deserialize(in); |
| return new TrieIndexEntry(dataFilePosition, indexTrieRoot, rowIndexBlockCount, deletionTime); |
| } |
| |
| } |