public new void Append(List <IKey> listOfKeys, IValue value)
{
StrValue strDataFilePathValue = null;
byte[] hash = null;
long timestamp = StreamFactory.NowUtc();
foreach (IKey key in listOfKeys)
{
if (logger != null)
{
logger.Log("Start ValueDataStream Append");
}
if (strDataFilePathValue == null)
{
Tuple <byte[], StrValue> temp = UpdateHelper(key, value, true, timestamp);
hash = temp.Item1;
strDataFilePathValue = temp.Item2;
}
else
{
base.UpdateHelper(key, strDataFilePathValue, true, hash, timestamp);
}
if (logger != null)
{
logger.Log("End ValueDataStream Append");
}
}
}
protected Tuple <Byte[], StrValue> UpdateHelper(IKey key, IValue value, bool IsAppend, long timestamp = -1)
{
if (!value.GetType().Equals(typeof(ByteValue)))
{
throw new InvalidDataException("Invalid IValue Type. ByteValue expected.");
}
if (logger != null)
{
logger.Log("Start FileDataStream Delete Old DataBlock");
}
// check if the entry is present, so that the old file can be deleted
IValue valueDataFilePathOld = base.Get(key);
// remove old entry/file if present and update has been called
if (valueDataFilePathOld != null && !IsAppend)
{
System.IO.FileInfo fi = new System.IO.FileInfo(valueDataFilePathOld.ToString());
try
{
fi.Delete();
}
catch (System.IO.IOException e)
{
Console.WriteLine(e.Message);
}
}
if (logger != null)
{
logger.Log("End FileDataStream Delete Old DataBlock");
}
if (logger != null)
{
logger.Log("Start FileDataStream Construct DataBlock");
}
long ts; // timestamp
ts = StreamFactory.HighResTick();
string dataFilePath = targetDir + "/" + Convert.ToString(ts) + ".dat";
StrValue strDataFilePathValue = new StrValue(Convert.ToString(ts) + ".dat");
if (streamtype == StreamFactory.StreamSecurityType.Secure)
{
value = new ByteValue(Crypto.EncryptBytesSimple(value.GetBytes(), Crypto.KeyDer(acl_md.encKey), acl_md.IV));
}
else
{
value = new ByteValue(value.GetBytes());
}
// if (logger != null) logger.Log("Start FileDataStream Construct DBI");
Byte[] hash;
if (streamtype == StreamFactory.StreamSecurityType.Secure)
{
hash = hasher.ComputeHash(value.GetBytes());
}
else
{
hash = null;
}
// if (logger != null) logger.Log("End FileDataStream Construct DBI");
if (logger != null)
{
logger.Log("End FileDataStream Construct DataBlock");
}
if (logger != null)
{
logger.Log("Start FileDataStream Update FilePathValue");
}
base.UpdateHelper(key, strDataFilePathValue, IsAppend, hash, timestamp);
if (logger != null)
{
logger.Log("End FileDataStream Update FilePathValue");
}
// write <val> to file
if (logger != null)
{
logger.Log("Start FileDataStream WriteToDisc DataBlock");
}
FileStream fout = new FileStream(dataFilePath,
FileMode.OpenOrCreate,
FileAccess.Write,
FileShare.ReadWrite);
fout.Write(value.GetBytes(), 0, (int)value.Size());
fout.Flush(true);
fout.Close();
if (logger != null)
{
logger.Log("End FileDataStream WriteToDisc DataBlock");
}
return(new Tuple <byte[], StrValue>(hash, strDataFilePathValue));
}
