protected sealed override void DoIteration()
{
if (_iteration % _iterations == 1)
{ // Emulating new session
_objectKey = Guid.NewGuid();
_cmdLoad.Parameters[0].Value = _cmdSave.Parameters[0].Value = _objectKey;
}
else
{ // Loading data from db
// Step 1: Getting serialized data
_cmdLoad.Parameters[0].Value = _objectKey;
_cmdLoad.ExecuteNonQuery();
byte[] obj = (byte[])_cmdLoad.Parameters[1].Value;
if (obj == null)
{
throw new Exception("Cannot locate an object with key: " + _objectKey.ToString());
}
SessionObject loadedObj = ObjStoreUtils.Deserialize <SessionObject>(obj);
// Validation - for demo purposes
if (loadedObj.iteration != _obj.iteration)
{
throw new Exception("Validation failed: Iterations do not match");
}
}
// Saving object to DB
_obj.iteration = _iteration;
_cmdSave.Parameters[2].Value = ObjStoreUtils.Serialize <SessionObject>(_obj);
_cmdSave.ExecuteNonQuery();
}
protected sealed override void DoIteration()
{
if (_iteration % _iterations == 1)
{ // Emulating new session
_objectKey = Guid.NewGuid();
_cmdLoad.Parameters[0].Value = _cmdSave.Parameters[0].Value = _objectKey;
}
else
{ // Loading data from db
// Step 1: Getting serialized chunks
_cmdLoad.Parameters[0].Value = _objectKey;
var chunks = new List <byte[]>();
using (var reader = _cmdLoad.ExecuteReader())
{
while (reader.Read())
{
chunks.Add((byte[])reader[0]);
}
}
if (chunks.Count == 0)
{
throw new Exception("Cannot locate an object with key: " + _objectKey.ToString());
}
// Step 2: Deserializing
SessionObject loadedObj = ObjStoreUtils.Deserialize <SessionObject>(ObjStoreUtils.Merge(chunks));
// Validation - for demo purposes
if (loadedObj.iteration != _obj.iteration)
{
throw new Exception("Validation failed: Iterations do not match");
}
}
// Saving object to DB
_obj.iteration = _iteration;
byte[] serializedObj = ObjStoreUtils.Serialize <SessionObject>(_obj);
if (_useTVP)
{
DataTable tbl = new DataTable();
tbl.Columns.Add("ChunkNum", typeof(short));
tbl.Columns.Add("Data", typeof(byte[]));
var chunks = ObjStoreUtils.Split(serializedObj, 8000);
for (int i = 0; i < chunks.Count; i++)
{
tbl.Rows.Add(i + 1, chunks[i]);
}
_cmdSave.Parameters[2].Value = tbl;
}
else
{
_cmdSave.Parameters[2].Value = serializedObj;
}
_cmdSave.ExecuteNonQuery();
}
