org.apache.activemq.util.RecoverableRandomAccessFile Maven / Gradle / Ivy
/**
* 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.util;
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;
public class RecoverableRandomAccessFile implements java.io.DataOutput, java.io.DataInput, java.io.Closeable {
private static final boolean SKIP_METADATA_UPDATE =
Boolean.getBoolean("org.apache.activemq.kahaDB.files.skipMetadataUpdate");
RandomAccessFile raf;
File file;
String mode;
final boolean isSkipMetadataUpdate;
public RecoverableRandomAccessFile(File file, String mode, boolean skipMetadataUpdate) throws FileNotFoundException {
this.file = file;
this.mode = mode;
raf = new RandomAccessFile(file, mode);
isSkipMetadataUpdate = skipMetadataUpdate;
}
public RecoverableRandomAccessFile(File file, String mode) throws FileNotFoundException {
this(file, mode, SKIP_METADATA_UPDATE);
}
public RecoverableRandomAccessFile(String name, String mode) throws FileNotFoundException {
this(new File(name), mode);
}
public RandomAccessFile getRaf() throws IOException {
if (raf == null) {
raf = new RandomAccessFile(file, mode);
}
return raf;
}
protected void handleException() throws IOException {
try {
if (raf != null) {
raf.close();
}
} catch (Throwable ignore) {
} finally {
raf = null;
}
}
@Override
public void close() throws IOException {
if (raf != null) {
raf.close();
}
}
@Override
public void readFully(byte[] bytes) throws IOException {
try {
getRaf().readFully(bytes);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void readFully(byte[] bytes, int i, int i2) throws IOException {
try {
getRaf().readFully(bytes, i, i2);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public int skipBytes(int i) throws IOException {
try {
return getRaf().skipBytes(i);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public boolean readBoolean() throws IOException {
try {
return getRaf().readBoolean();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public byte readByte() throws IOException {
try {
return getRaf().readByte();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public int readUnsignedByte() throws IOException {
try {
return getRaf().readUnsignedByte();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public short readShort() throws IOException {
try {
return getRaf().readShort();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public int readUnsignedShort() throws IOException {
try {
return getRaf().readUnsignedShort();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public char readChar() throws IOException {
try {
return getRaf().readChar();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public int readInt() throws IOException {
try {
return getRaf().readInt();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public long readLong() throws IOException {
try {
return getRaf().readLong();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public float readFloat() throws IOException {
try {
return getRaf().readFloat();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public double readDouble() throws IOException {
try {
return getRaf().readDouble();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public String readLine() throws IOException {
try {
return getRaf().readLine();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public String readUTF() throws IOException {
try {
return getRaf().readUTF();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void write(int i) throws IOException {
try {
getRaf().write(i);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void write(byte[] bytes) throws IOException {
try {
getRaf().write(bytes);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void write(byte[] bytes, int i, int i2) throws IOException {
try {
getRaf().write(bytes, i, i2);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void writeBoolean(boolean b) throws IOException {
try {
getRaf().writeBoolean(b);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void writeByte(int i) throws IOException {
try {
getRaf().writeByte(i);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void writeShort(int i) throws IOException {
try {
getRaf().writeShort(i);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void writeChar(int i) throws IOException {
try {
getRaf().writeChar(i);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void writeInt(int i) throws IOException {
try {
getRaf().writeInt(i);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void writeLong(long l) throws IOException {
try {
getRaf().writeLong(l);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void writeFloat(float v) throws IOException {
try {
getRaf().writeFloat(v);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void writeDouble(double v) throws IOException {
try {
getRaf().writeDouble(v);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void writeBytes(String s) throws IOException {
try {
getRaf().writeBytes(s);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void writeChars(String s) throws IOException {
try {
getRaf().writeChars(s);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
@Override
public void writeUTF(String s) throws IOException {
try {
getRaf().writeUTF(s);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
//RAF methods
public long length() throws IOException {
try {
return getRaf().length();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
public void setLength(long length) throws IOException {
throw new IllegalStateException("File size is pre allocated");
}
public void seek(long pos) throws IOException {
try {
getRaf().seek(pos);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
public FileDescriptor getFD() throws IOException {
try {
return getRaf().getFD();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
public void sync() throws IOException {
try {
getRaf().getChannel().force(!isSkipMetadataUpdate);;
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
public FileChannel getChannel() throws IOException {
try {
return getRaf().getChannel();
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
public int read(byte[] b, int off, int len) throws IOException {
try {
return getRaf().read(b, off, len);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
public int read(byte[] b) throws IOException {
try {
return getRaf().read(b);
} catch (IOException ioe) {
handleException();
throw ioe;
}
}
}