void configureNewFile() {
blockSize(configImpl().blockSize());
_fileHeader = FileHeader.newCurrentFileHeader();
setRegularEndAddress(_fileHeader.length());
newSystemData(configImpl().freespaceSystem(), configImpl().idSystemType());
systemData().converterVersion(Converter.VERSION);
createStringIO(_systemData.stringEncoding());
createIdSystem();
initializeClassMetadataRepository();
initalizeWeakReferenceSupport();
generateNewIdentity();
AbstractFreespaceManager blockedFreespaceManager = AbstractFreespaceManager.createNew(this);
installFreespaceManager(blockedFreespaceManager);
initNewClassCollection();
initializeEssentialClasses();
_fileHeader.initNew(this);
blockedFreespaceManager.start(0);
}
void readThis() throws OldFormatException {
newSystemData(AbstractFreespaceManager.FM_LEGACY_RAM, StandardIdSystemFactory.LEGACY);
blockSizeReadFromFile(1);
_fileHeader = FileHeader.read(this);
if (config().generateCommitTimestamps().isUnspecified()) {
config().generateCommitTimestamps(_systemData.idToTimestampIndexId() != 0);
}
createStringIO(_systemData.stringEncoding());
createIdSystem();
initializeClassMetadataRepository();
initalizeWeakReferenceSupport();
setNextTimeStampId(systemData().lastTimeStampID());
classCollection().setID(_systemData.classCollectionID());
classCollection().read(systemTransaction());
Converter.convert(new ConversionStage.ClassCollectionAvailableStage(this));
_fileHeader.readIdentity(this);
if (_config.isReadOnly()) {
return;
}
if (!configImpl().commitRecoveryDisabled()) {
_fileHeader.completeInterruptedTransaction(this);
}
FreespaceManager blockedFreespaceManager =
AbstractFreespaceManager.createNew(this, _systemData.freespaceSystem());
installFreespaceManager(blockedFreespaceManager);
blockedFreespaceManager.read(this, _systemData.inMemoryFreespaceSlot());
blockedFreespaceManager.start(_systemData.bTreeFreespaceId());
_fileHeader = _fileHeader.convert(this);
if (freespaceMigrationRequired(blockedFreespaceManager)) {
migrateFreespace(blockedFreespaceManager);
}
writeHeader(true, false);
if (Converter.convert(new ConversionStage.SystemUpStage(this))) {
_systemData.converterVersion(Converter.VERSION);
_fileHeader.writeVariablePart(this);
transaction().commit();
}
}
public void writeHeader(boolean startFileLockingThread, boolean shuttingDown) {
if (shuttingDown) {
_freespaceManager.write(this);
_freespaceManager = null;
}
StatefulBuffer writer = createStatefulBuffer(systemTransaction(), 0, _fileHeader.length());
_fileHeader.writeFixedPart(this, startFileLockingThread, shuttingDown, writer, blockSize());
if (shuttingDown) {
ensureLastSlotWritten();
}
syncFiles();
}
public void setIdentity(Db4oDatabase identity) {
synchronized (lock()) {
_systemData.identity(identity);
// The dirty TimeStampIdGenerator triggers writing of
// the variable part of the systemdata. We need to
// make it dirty here, so the new identity is persisted:
_timeStampIdGenerator.generate();
_fileHeader.writeVariablePart(this);
}
}
private void migrateFreespace(FreespaceManager oldFreespaceManager) {
FreespaceManager newFreespaceManager =
AbstractFreespaceManager.createNew(this, configImpl().freespaceSystem());
newFreespaceManager.start(0);
systemData().freespaceSystem(configImpl().freespaceSystem());
installFreespaceManager(newFreespaceManager);
AbstractFreespaceManager.migrate(oldFreespaceManager, newFreespaceManager);
_fileHeader.writeVariablePart(this);
}
public Runnable commitHook() {
_systemData.lastTimeStampID(_timeStampIdGenerator.last());
return _fileHeader.commit(false);
}
public final void writeTransactionPointer(int pointer) {
_fileHeader.writeTransactionPointer(systemTransaction(), pointer);
}