private void writeToLockFile(int lockSignal) {
ByteArrayBuffer lockBuffer = newLockFileBuffer();
lockBuffer.writeInt(lockSignal);
lockBuffer.writeInt(lockSignal);
write(_lockFile, lockBuffer);
_lockFile.sync();
}
@Override
public void applySlotChanges(
Visitable<SlotChange> slotChangeTree, int slotChangeCount, Slot reservedSlot) {
if (slotChangeCount < 1) {
return;
}
Runnable commitHook = _container.commitHook();
flushDatabaseFile();
ensureLogAndLock();
int length = transactionLogSlotLength(slotChangeCount);
ByteArrayBuffer logBuffer = new ByteArrayBuffer(length);
logBuffer.writeInt(length);
logBuffer.writeInt(slotChangeCount);
appendSlotChanges(logBuffer, slotChangeTree);
write(_logFile, logBuffer);
_logFile.sync();
writeToLockFile(LOCK_INT);
writeSlots(slotChangeTree);
commitHook.run();
flushDatabaseFile();
writeToLockFile(0);
}
private boolean lockFileSignalsInterruptedTransaction() {
openLockFile();
ByteArrayBuffer buffer = newLockFileBuffer();
read(_lockFile, buffer);
for (int i = 0; i < 2; i++) {
int checkInt = buffer.readInt();
if (checkInt != LOCK_INT) {
closeLockFile();
return false;
}
}
closeLockFile();
return true;
}
public void completeInterruptedTransaction(int transactionId1, int transactionId2) {
if (!File4.exists(lockFileName(_fileName))) {
return;
}
if (!lockFileSignalsInterruptedTransaction()) {
return;
}
ByteArrayBuffer buffer = new ByteArrayBuffer(Const4.INT_LENGTH);
openLogFile();
read(_logFile, buffer);
int length = buffer.readInt();
if (length > 0) {
buffer = new ByteArrayBuffer(length);
read(_logFile, buffer);
buffer.incrementOffset(Const4.INT_LENGTH);
readWriteSlotChanges(buffer);
}
deleteLockFile();
closeLogFile();
deleteLogFile();
}
private void write(Bin storage, ByteArrayBuffer buffer) {
storage.write(0, buffer._buffer, buffer.length());
}
private void read(Bin storage, ByteArrayBuffer buffer) {
storage.read(0, buffer._buffer, buffer.length());
}