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Copy pathLoggerVolume.java
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211 lines (163 loc) · 4.7 KB
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package org.mapdb;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.PrintStream;
/**
* Logs write operations performed on Volume.
* Useful for debugging storage problems.
*/
public class LoggerVolume extends Volume{
public static class Factory implements Volume.Factory {
final Volume.Factory loggedFac;
final Volume.Factory logFac;
public Factory(Volume.Factory loggedFac, Volume.Factory logFac) {
this.loggedFac = loggedFac;
this.logFac = logFac;
}
@Override
public Volume createIndexVolume() {
return new LoggerVolume(loggedFac.createIndexVolume(), logFac.createIndexVolume());
}
@Override
public Volume createPhysVolume() {
return new LoggerVolume(loggedFac.createPhysVolume(), logFac.createPhysVolume());
}
@Override
public Volume createTransLogVolume() {
return new LoggerVolume(loggedFac.createTransLogVolume(), logFac.createTransLogVolume());
}
}
protected static final byte LONG = 1;
protected static final byte BYTE = 2;
protected static final byte BYTE_ARRAY = 3;
protected static final byte INT = 4;
protected final Volume logged;
protected final Volume log;
protected long pos = 0;
public LoggerVolume(Volume logged, Volume log) {
this.logged = logged;
this.log = log;
}
protected void logStackTrace(){
ByteArrayOutputStream out = new ByteArrayOutputStream();
new Exception().printStackTrace(new PrintStream(out));
byte[] b = out.toByteArray();
log.ensureAvailable(pos +8 + b.length);
log.putLong(pos, b.length);
pos +=8;
log.putData(pos, b, 0, b.length);
pos += b.length;
}
@Override
synchronized public void ensureAvailable(long offset) {
logged.ensureAvailable(offset);
}
@Override
public boolean tryAvailable(long offset) {
return logged.tryAvailable(offset);
}
@Override
public void truncate(long size) {
logged.truncate(size);
}
@Override
synchronized public void putLong(long offset, long value) {
logged.putLong(offset, value);
log.ensureAvailable(pos+1+8+8);
log.putByte(pos, LONG);
pos+=1;
log.putLong(pos, offset);
pos+=8;
log.putLong(pos, value);
pos+=8;
logStackTrace();
}
@Override
synchronized public void putInt(long offset, int value) {
logged.putLong(offset, value);
log.ensureAvailable(pos+1+8+4);
log.putByte(pos, INT);
pos+=1;
log.putLong(pos, offset);
pos+=8;
log.putInt(pos, value);
pos+=4;
logStackTrace();
}
@Override
synchronized public void putByte(long offset, byte value) {
logged.putByte(offset, value);
log.ensureAvailable(pos+1+8+1);
log.putByte(pos, BYTE);
pos+=1;
log.putLong(pos, offset);
pos+=8;
log.putByte(pos, value);
pos+=1;
logStackTrace();
}
@Override
synchronized public void putData(long offset, byte[] value, int pos, int size) {
logged.putData(offset, value, 0, size);
log.ensureAvailable(pos+1+8+size);
log.putByte(pos, BYTE_ARRAY);
pos+=1;
log.putLong(pos, offset);
pos+=8;
log.putData(pos, value, 0, size);
pos+=size;
logStackTrace();
}
@Override
synchronized public void putData(long offset, java.nio.ByteBuffer buf) {
int size = buf.limit()-buf.position();
byte[] b = new byte[size];
buf.get(b);
putData(offset, b, 0, size);
}
@Override
public long getLong(long offset) {
return logged.getLong(offset);
}
@Override
public int getInt(long offset) {
return logged.getInt(offset);
}
@Override
public byte getByte(long offset) {
return logged.getByte(offset);
}
@Override
public DataInput2 getDataInput(long offset, int size) {
return (DataInput2) logged.getDataInput(offset, size);
}
@Override
public void close() {
logged.close();
}
@Override
public void sync() {
logged.sync();
log.sync();
}
@Override
public int sliceSize() {
return logged.sliceSize();
}
@Override
public boolean isEmpty() {
return logged.isEmpty();
}
@Override
public void deleteFile() {
logged.deleteFile();
}
@Override
public boolean isSliced() {
return logged.isSliced();
}
@Override
public File getFile() {
return logged.getFile();
}
}