public void Create(TxRec tx)
{
if (tx.LagName != null && tx.LagName.Length > 64)
{
throw new NFSdbTransactionStateExcepton("Partition name is too long");
}
var offset = Math.Max(MIN_TX_ADDRESS, _data.GetAppendOffset());
var orignalOffset = offset;
// 4
var size = tx.Size();
WriteInt32(size, ref offset);
// 8
WriteInt64(tx.PrevTxAddress, ref offset);
// 1
WriteByte(tx.Command, ref offset);
// 8
WriteInt64(DateTime.Now.Ticks, ref offset);
// 8
WriteInt64(tx.JournalMaxRowID, ref offset);
// 8
WriteInt64(tx.LastPartitionTimestamp, ref offset);
// 8
WriteInt64(tx.LagSize, ref offset);
// 1
if (tx.LagName == null)
{
WriteByte(0, ref offset);
}
else
{
WriteByte(1, ref offset);
// 2
WriteByte((byte)tx.LagName.Length, ref offset);
// TxRec.lagName.len
foreach (char t in tx.LagName)
{
WriteByte((byte)t, ref offset);
}
}
// 2 + 4 * TxRec.symbolTableSizes.len
WriteInt32Array(tx.SymbolTableSizes, ref offset);
WriteInt64Array(tx.SymbolTableIndexPointers, ref offset);
WriteInt64Array(tx.IndexPointers, ref offset);
WriteInt64Array(tx.LagIndexPointers, ref offset);
// write out TxRec address
SetTxAddress(orignalOffset);
_data.SetAppendOffset(orignalOffset + size);
}
public TxRec Get()
{
if (IsEmpty())
{
return(null);
}
var tx = new TxRec();
var offset = GetTxAddress();
var initialOffset = offset;
int txSize = ReadInt32(ref offset);
tx.PrevTxAddress = ReadInt64(ref offset);
tx.Command = ReadByte(ref offset);
tx.Timestamp = ReadInt64(ref offset);
tx.JournalMaxRowID = ReadInt64(ref offset);
tx.LastPartitionTimestamp = ReadInt64(ref offset);
tx.LagSize = ReadInt64(ref offset);
var sz = ReadByte(ref offset);
if (sz == 0)
{
tx.LagName = null;
}
else
{
// lagName
sz = ReadByte(ref offset);
var nameBytes = new byte[sz];
_data.ReadBytes(offset, nameBytes, 0, sz);
tx.LagName = Encoding.ASCII.GetString(nameBytes);
offset += sz;
}
// symbolTableSizes
tx.SymbolTableSizes = ReadInt32Array(ref offset);
//symbolTableIndexPointers
tx.SymbolTableIndexPointers = ReadInt64Array(ref offset);
//indexPointers
tx.IndexPointers = ReadInt64Array(ref offset);
//lagIndexPointers
tx.LagIndexPointers = ReadInt64Array(ref offset);
return(tx);
}
public static bool IsCommited(this TxRec txRec, DateTime partitionStartDate, int partitionID)
{
if (txRec == null)
{
return(false);
}
if (txRec.LastPartitionTimestamp != 0)
{
return(partitionStartDate <= DateUtils.UnixTimestampToDateTime(txRec.LastPartitionTimestamp));
}
var lastPartitionID = RowIDUtil.ToPartitionIDFromExternalRowID(txRec.JournalMaxRowID);
return(partitionID <= lastPartitionID);
}
public void AddPartition(IPartition parition)
{
_paritions.Add(parition);
while (_paritions.Count <= parition.PartitionID)
{
_paritions.Add(null);
}
_paritions[parition.PartitionID] = parition;
if (_txData.Length < _paritions.Count)
{
var oldTx = _txData;
_txData = new PartitionTxData[_paritions.Count + RESERVED_PARTITION_COUNT];
Array.Copy(oldTx, _txData, oldTx.Length);
}
_txRec = null;
}
internal DeferredTransactionContext(TxState state,
IUnsafePartitionManager paritionManager,
TxRec txRec,
int partitionTtlMs)
{
_state = state;
_paritionManager = paritionManager;
_paritions = _state.Partitions;
_locks = _state.Locks;
_locks.Clear();
_readCache = _state.ReadContext;
var lastPartition = _paritions.LastNotNull();
_lastPartitionID = lastPartition != null ? lastPartition.PartitionID : -1;
_txRec = txRec;
_partitionTtlMs = partitionTtlMs;
_txData = new PartitionTxData[_paritions.Count + 1 + RESERVED_PARTITION_COUNT];
LastAppendTimestamp = txRec != null?DateUtils.UnixTimestampToDateTime(txRec.LastPartitionTimestamp) : DateTime.MinValue;
}
