| /* |
| * |
| * 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.bookkeeper.bookie; |
| |
| import java.io.File; |
| import java.io.FileDescriptor; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import java.nio.channels.FileChannel; |
| import org.apache.bookkeeper.conf.ServerConfiguration; |
| |
| /** |
| * Default FileChannel for bookie to read and write. |
| * |
| */ |
| public class DefaultFileChannel implements BookieFileChannel { |
| private final File file; |
| private RandomAccessFile randomAccessFile; |
| private final ServerConfiguration configuration; |
| |
| DefaultFileChannel(File file, ServerConfiguration serverConfiguration) throws IOException { |
| this.file = file; |
| this.configuration = serverConfiguration; |
| } |
| |
| @Override |
| public FileChannel getFileChannel() throws FileNotFoundException { |
| synchronized (this) { |
| if (randomAccessFile == null) { |
| randomAccessFile = new RandomAccessFile(file, "rw"); |
| } |
| return randomAccessFile.getChannel(); |
| } |
| } |
| |
| @Override |
| public boolean fileExists(File file) { |
| return file.exists(); |
| } |
| |
| @Override |
| public FileDescriptor getFD() throws IOException { |
| synchronized (this) { |
| if (randomAccessFile == null) { |
| throw new IOException("randomAccessFile is null, please initialize it by calling getFileChannel"); |
| } |
| return randomAccessFile.getFD(); |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| synchronized (this) { |
| if (randomAccessFile != null) { |
| randomAccessFile.close(); |
| } |
| } |
| } |
| } |