| /* |
| * 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.util; |
| |
| import java.io.IOException; |
| |
| import org.apache.cassandra.io.compress.BufferType; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| class ChecksummedRebufferer extends BufferManagingRebufferer |
| { |
| private final DataIntegrityMetadata.ChecksumValidator validator; |
| |
| @SuppressWarnings("resource") // chunk reader is closed by super::close() |
| ChecksummedRebufferer(ChannelProxy channel, DataIntegrityMetadata.ChecksumValidator validator) |
| { |
| super(new SimpleChunkReader(channel, channel.size(), BufferType.ON_HEAP, validator.chunkSize)); |
| this.validator = validator; |
| } |
| |
| @Override |
| public BufferHolder rebuffer(long desiredPosition) |
| { |
| if (desiredPosition != offset + buffer.position()) |
| validator.seek(desiredPosition); |
| |
| // align with buffer size, as checksums were computed in chunks of buffer size each. |
| offset = alignedPosition(desiredPosition); |
| source.readChunk(offset, buffer); |
| |
| try |
| { |
| validator.validate(ByteBufferUtil.getArray(buffer), 0, buffer.remaining()); |
| } |
| catch (IOException e) |
| { |
| throw new CorruptFileException(e, channel().filePath()); |
| } |
| |
| return this; |
| } |
| |
| @Override |
| public void close() |
| { |
| try |
| { |
| source.close(); |
| } |
| finally |
| { |
| validator.close(); |
| } |
| } |
| |
| @Override |
| long alignedPosition(long desiredPosition) |
| { |
| return (desiredPosition / buffer.capacity()) * buffer.capacity(); |
| } |
| } |