001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.kahadb.journal; 018 019import java.io.File; 020import java.io.IOException; 021import java.io.RandomAccessFile; 022 023import org.apache.kahadb.util.IOHelper; 024import org.apache.kahadb.util.LinkedNode; 025import org.apache.kahadb.util.SequenceSet; 026 027/** 028 * DataFile 029 * 030 * 031 */ 032public class DataFile extends LinkedNode<DataFile> implements Comparable<DataFile> { 033 034 protected final File file; 035 protected final Integer dataFileId; 036 protected volatile int length; 037 protected final SequenceSet corruptedBlocks = new SequenceSet(); 038 039 DataFile(File file, int number, int preferedSize) { 040 this.file = file; 041 this.dataFileId = Integer.valueOf(number); 042 length = (int)(file.exists() ? file.length() : 0); 043 } 044 045 public File getFile() { 046 return file; 047 } 048 049 public Integer getDataFileId() { 050 return dataFileId; 051 } 052 053 public synchronized int getLength() { 054 return length; 055 } 056 057 public void setLength(int length) { 058 this.length = length; 059 } 060 061 public synchronized void incrementLength(int size) { 062 length += size; 063 } 064 065 public synchronized String toString() { 066 return file.getName() + " number = " + dataFileId + " , length = " + length; 067 } 068 069 public synchronized RandomAccessFile openRandomAccessFile() throws IOException { 070 return new RandomAccessFile(file, "rw"); 071 } 072 073 public synchronized void closeRandomAccessFile(RandomAccessFile file) throws IOException { 074 file.close(); 075 } 076 077 public synchronized boolean delete() throws IOException { 078 return file.delete(); 079 } 080 081 public synchronized void move(File targetDirectory) throws IOException{ 082 IOHelper.moveFile(file,targetDirectory); 083 } 084 085 public SequenceSet getCorruptedBlocks() { 086 return corruptedBlocks; 087 } 088 089 public int compareTo(DataFile df) { 090 return dataFileId - df.dataFileId; 091 } 092 093 @Override 094 public boolean equals(Object o) { 095 boolean result = false; 096 if (o instanceof DataFile) { 097 result = compareTo((DataFile)o) == 0; 098 } 099 return result; 100 } 101 102 @Override 103 public int hashCode() { 104 return dataFileId; 105 } 106}