uint ReadRelationVersions(uint relationIndex, string name, Dictionary <uint, RelationVersionInfo> relationVersions)
{
uint lastPersistedVersion = 0;
var relationInfoResolver = new RelationInfoResolver((ObjectDB)_tr.Owner);
var writer = new ByteBufferWriter();
writer.WriteByteArrayRaw(ObjectDB.RelationVersionsPrefix);
writer.WriteVUInt32(relationIndex);
_trkv.SetKeyPrefix(writer.Data);
if (!_trkv.FindFirstKey())
{
return(lastPersistedVersion);
}
var keyReader = new KeyValueDBKeyReader(_trkv);
var valueReader = new KeyValueDBValueReader(_trkv);
do
{
keyReader.Restart();
valueReader.Restart();
lastPersistedVersion = keyReader.ReadVUInt32();
var relationVersionInfo = RelationVersionInfo.LoadUnresolved(valueReader, name);
relationVersionInfo.ResolveFieldHandlers(relationInfoResolver.FieldHandlerFactory);
relationVersions[lastPersistedVersion] = relationVersionInfo;
} while (_trkv.FindNextKey());
return(lastPersistedVersion);
}
void LoadVersionInfos(IKeyValueDBTransaction tr)
{
LastPersistedVersion = 0;
var writer = new ByteBufferWriter();
writer.WriteByteArrayRaw(ObjectDB.RelationVersionsPrefix);
writer.WriteVUInt32(_id);
tr.SetKeyPrefix(writer.Data);
if (!tr.FindFirstKey())
{
return;
}
var keyReader = new KeyValueDBKeyReader(tr);
var valueReader = new KeyValueDBValueReader(tr);
do
{
keyReader.Restart();
valueReader.Restart();
LastPersistedVersion = keyReader.ReadVUInt32();
var relationVersionInfo = RelationVersionInfo.Load(valueReader,
_relationInfoResolver.FieldHandlerFactory, _name);
_relationVersions[LastPersistedVersion] = relationVersionInfo;
} while (tr.FindNextKey());
}
public IEnumerator <T> GetEnumerator()
{
var keyWriter = new ByteBufferWriter();
keyWriter.WriteByteArrayRaw(ObjectDB.AllRelationsPKPrefix);
keyWriter.WriteVUInt32(_relationInfo.Id);
return(new RelationEnumerator <T>(_transaction, _relationInfo, keyWriter.Data.ToAsyncSafe()));
}
void CalculateSecondaryKey(IInternalObjectDBTransaction tr, IList <KeyValuePair <uint, SecondaryKeyInfo> > indexes)
{
var keyWriter = new ByteBufferWriter();
var enumeratorType = typeof(RelationEnumerator <>).MakeGenericType(_clientType);
keyWriter.WriteByteArrayRaw(ObjectDB.AllRelationsPKPrefix);
keyWriter.WriteVUInt32(Id);
var enumerator = (IEnumerator)Activator.CreateInstance(enumeratorType, tr, this, keyWriter.GetDataAndRewind().ToAsyncSafe(), new SimpleModificationCounter());
var keySavers = new Action <IInternalObjectDBTransaction, AbstractBufferedWriter, object> [indexes.Count];
for (int i = 0; i < indexes.Count; i++)
{
keySavers[i] = CreateSaver(ClientRelationVersionInfo.GetSecondaryKeyFields(indexes[i].Key),
$"Relation_{Name}_Upgrade_SK_{indexes[i].Value.Name}_KeySaver");
}
while (enumerator.MoveNext())
{
var obj = enumerator.Current;
tr.TransactionProtector.Start();
tr.KeyValueDBTransaction.SetKeyPrefix(ObjectDB.AllRelationsSKPrefix);
for (int i = 0; i < indexes.Count; i++)
{
keyWriter.WriteVUInt32(Id);
keyWriter.WriteVUInt32(indexes[i].Key);
keySavers[i](tr, keyWriter, obj);
var keyBytes = keyWriter.GetDataAndRewind();
if (!tr.KeyValueDBTransaction.CreateOrUpdateKeyValue(keyBytes, ByteBuffer.NewEmpty()))
{
throw new BTDBException("Internal error, secondary key bytes must be always unique.");
}
}
}
}
public RelationInfo(uint id, string name, IRelationInfoResolver relationInfoResolver, Type interfaceType,
Type clientType, IInternalObjectDBTransaction tr)
{
_id = id;
_name = name;
_relationInfoResolver = relationInfoResolver;
_interfaceType = interfaceType;
_clientType = clientType;
ClientRelationVersionInfo = CreateVersionInfoByReflection();
LoadVersionInfos(tr.KeyValueDBTransaction);
ApartFields = FindApartFields(interfaceType, ClientRelationVersionInfo);
if (LastPersistedVersion > 0 && RelationVersionInfo.Equal(_relationVersions[LastPersistedVersion], ClientRelationVersionInfo))
{
_relationVersions[LastPersistedVersion] = ClientRelationVersionInfo;
ClientTypeVersion = LastPersistedVersion;
}
else
{
ClientTypeVersion = LastPersistedVersion + 1;
_relationVersions.Add(ClientTypeVersion, ClientRelationVersionInfo);
var writerk = new ByteBufferWriter();
writerk.WriteByteArrayRaw(ObjectDB.RelationVersionsPrefix);
writerk.WriteVUInt32(_id);
writerk.WriteVUInt32(ClientTypeVersion);
var writerv = new ByteBufferWriter();
ClientRelationVersionInfo.Save(writerv);
tr.KeyValueDBTransaction.SetKeyPrefix(ByteBuffer.NewEmpty());
tr.KeyValueDBTransaction.CreateOrUpdateKeyValue(writerk.Data, writerv.Data);
if (LastPersistedVersion > 0)
{
CheckThatPrimaryKeyHasNotChanged(name, ClientRelationVersionInfo, _relationVersions[LastPersistedVersion]);
UpdateSecondaryKeys(tr, ClientRelationVersionInfo, _relationVersions[LastPersistedVersion]);
}
}
_typeConvertorGenerator = tr.Owner.TypeConvertorGenerator;
}
