org.apache.activemq.store.kahadb.disk.journal.DataFile Maven / Gradle / Ivy
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/**
* 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.activemq.store.kahadb.disk.journal;
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import org.apache.activemq.store.kahadb.disk.util.LinkedNode;
import org.apache.activemq.store.kahadb.disk.util.SequenceSet;
import org.apache.activemq.util.IOHelper;
import org.apache.activemq.util.RecoverableRandomAccessFile;
/**
* DataFile
*
*
*/
public class DataFile extends LinkedNode implements Comparable {
protected final File file;
protected final Integer dataFileId;
protected volatile int length;
protected final SequenceSet corruptedBlocks = new SequenceSet();
DataFile(File file, int number, int preferedSize) {
this.file = file;
this.dataFileId = Integer.valueOf(number);
length = (int)(file.exists() ? file.length() : 0);
}
public File getFile() {
return file;
}
public Integer getDataFileId() {
return dataFileId;
}
public synchronized int getLength() {
return length;
}
public void setLength(int length) {
this.length = length;
}
public synchronized void incrementLength(int size) {
length += size;
}
@Override
public synchronized String toString() {
return file.getName() + " number = " + dataFileId + " , length = " + length;
}
public synchronized RecoverableRandomAccessFile openRandomAccessFile() throws IOException {
return new RecoverableRandomAccessFile(file.getCanonicalPath(), "rw");
}
public synchronized void closeRandomAccessFile(RecoverableRandomAccessFile file) throws IOException {
file.close();
}
public synchronized boolean delete() throws IOException {
return file.delete();
}
public synchronized void move(File targetDirectory) throws IOException{
IOHelper.moveFile(file, targetDirectory);
}
public SequenceSet getCorruptedBlocks() {
return corruptedBlocks;
}
@Override
public int compareTo(DataFile df) {
return dataFileId - df.dataFileId;
}
@Override
public boolean equals(Object o) {
boolean result = false;
if (o instanceof DataFile) {
result = compareTo((DataFile)o) == 0;
}
return result;
}
@Override
public int hashCode() {
return dataFileId;
}
}