public long ReadOidPosition(OID oid)
{
if (OdbConfiguration.IsLoggingEnabled())
{
DLogger.Debug("ObjectReader: Start of readOidPosition for oid " + oid);
}
var blockNumber = StorageEngineConstant.GetIdBlockNumberOfOid(oid);
var blockPosition = GetIdBlockPositionFromNumber(blockNumber);
if (OdbConfiguration.IsLoggingEnabled())
{
var blockNumberAsString = blockNumber.ToString();
var blockPositionAsString = blockPosition.ToString();
DLogger.Debug(string.Format("ObjectReader: Block number of oid {0} is ", oid) + blockNumberAsString +
" / block position = " + blockPositionAsString);
}
var position = blockPosition + StorageEngineConstant.BlockIdOffsetForStartOfRepetition +
((oid.ObjectId - 1) % StorageEngineConstant.NbIdsPerBlock) *
StorageEngineConstant.IdBlockRepetitionSize;
if (OdbConfiguration.IsLoggingEnabled())
{
var positionAsString = position.ToString();
DLogger.Debug(string.Format("ObjectReader: End of readOidPosition for oid {0} returning position ", oid) + positionAsString);
}
return(position);
}
public void ReadDatabaseHeader()
{
var version = ReadDatabaseVersion();
StorageEngineConstant.CheckDbVersionCompatibility(version);
var databaseIdsArray = new long[4];
databaseIdsArray[0] = _fsi.ReadLong();
databaseIdsArray[1] = _fsi.ReadLong();
databaseIdsArray[2] = _fsi.ReadLong();
databaseIdsArray[3] = _fsi.ReadLong();
IDatabaseId databaseId = new DatabaseId(databaseIdsArray);
var nbClasses = ReadNumberOfClasses();
var firstClassPosition = ReadFirstClassOid();
if (nbClasses < 0)
{
throw new CorruptedDatabaseException(
NDatabaseError.NegativeClassNumberInHeader.AddParameter(nbClasses).AddParameter(firstClassPosition));
}
ReadLastOdbCloseStatus();
ReadDatabaseCharacterEncoding();
var currentBlockPosition = _fsi.ReadLong();
// Gets the current id block number
_fsi.SetReadPosition(currentBlockPosition + StorageEngineConstant.BlockIdOffsetForBlockNumber);
var currentBlockIdNumber = _fsi.ReadInt();
var blockMaxId = OIDFactory.BuildObjectOID(_fsi.ReadLong());
_storageEngine.SetDatabaseId(databaseId);
var currentBlockInfo = new CurrentIdBlockInfo
{
CurrentIdBlockPosition = currentBlockPosition,
CurrentIdBlockNumber = currentBlockIdNumber,
CurrentIdBlockMaxOid = blockMaxId
};
_storageEngine.SetCurrentIdBlockInfos(currentBlockInfo);
}
public long ReadOidPosition(OID oid)
{
Log4NetHelper.Instance.LogDebugMessage("ObjectReader: Start of readOidPosition for oid " + oid);
var blockNumber = StorageEngineConstant.GetIdBlockNumberOfOid(oid);
var blockPosition = GetIdBlockPositionFromNumber(blockNumber);
var blockNumberAsString = blockNumber.ToString();
var blockPositionAsString = blockPosition.ToString();
Log4NetHelper.Instance.LogDebugMessage(string.Format("ObjectReader: Block number of oid {0} is ", oid) + blockNumberAsString +
" / block position = " + blockPositionAsString);
var position = blockPosition + StorageEngineConstant.BlockIdOffsetForStartOfRepetition +
((oid.ObjectId - 1) % StorageEngineConstant.NbIdsPerBlock) *
StorageEngineConstant.IdBlockRepetitionSize;
var positionAsString = position.ToString();
Log4NetHelper.Instance.LogDebugMessage(string.Format("ObjectReader: End of readOidPosition for oid {0} returning position ", oid) + positionAsString);
return(position);
}
