/**
* Commit a transaction.
*
* @param t the transaction
* @param maxLogId the last log id
*/
void commit(Transaction t, long maxLogId) {
for (long logId = 0; logId < maxLogId; logId++) {
long[] undoKey = new long[] {t.getId(), logId};
Object[] op = undoLog.get(undoKey);
int opType = (Integer) op[0];
if (opType == Transaction.OP_REMOVE) {
int mapId = (Integer) op[1];
Map<String, String> meta = store.getMetaMap();
String m = meta.get("map." + mapId);
String mapName = DataUtils.parseMap(m).get("name");
MVMap<Object, Object[]> map = store.openMap(mapName);
Object key = op[2];
Object[] value = map.get(key);
// possibly the entry was added later on
// so we have to check
if (value[2] == null) {
// remove the value
map.remove(key);
}
}
undoLog.remove(undoKey);
}
endTransaction(t);
}
/**
* Roll a transaction back.
*
* @param t the transaction
* @param maxLogId the last log id
*/
void rollback(Transaction t, long maxLogId) {
rollbackTo(t, maxLogId, 0);
endTransaction(t);
}