| /* |
| * 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 org.apache.cassandra.cache.ChunkCache; |
| import org.apache.cassandra.io.compress.BufferType; |
| |
| public class BufferedSegmentedFile extends SegmentedFile |
| { |
| public BufferedSegmentedFile(ChannelProxy channel, int bufferSize, long length) |
| { |
| this(channel, createRebufferer(channel, length, bufferSize), length); |
| } |
| |
| private BufferedSegmentedFile(ChannelProxy channel, RebuffererFactory rebufferer, long length) |
| { |
| super(new Cleanup(channel, rebufferer), channel, rebufferer, length); |
| } |
| |
| private BufferedSegmentedFile(BufferedSegmentedFile copy) |
| { |
| super(copy); |
| } |
| |
| private static RebuffererFactory createRebufferer(ChannelProxy channel, long length, int bufferSize) |
| { |
| return ChunkCache.maybeWrap(new SimpleChunkReader(channel, length, BufferType.OFF_HEAP, bufferSize)); |
| } |
| |
| public static class Builder extends SegmentedFile.Builder |
| { |
| public SegmentedFile complete(ChannelProxy channel, int bufferSize, long overrideLength) |
| { |
| long length = overrideLength > 0 ? overrideLength : channel.size(); |
| return new BufferedSegmentedFile(channel, bufferSize, length); |
| } |
| } |
| |
| public BufferedSegmentedFile sharedCopy() |
| { |
| return new BufferedSegmentedFile(this); |
| } |
| } |