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 void Iterate(bool sortTableByNameAsc = false)
{
LoadTableNamesDict();
LoadRelationNamesDict();
MarkLastDictId();
_trkv.SetKeyPrefixUnsafe(ObjectDB.TableSingletonsPrefix);
var keyReader = new KeyValueDBKeyReader(_trkv);
var valueReader = new KeyValueDBValueReader(_trkv);
_singletons = new Dictionary <uint, ulong>();
while (_trkv.FindNextKey())
{
keyReader.Restart();
valueReader.Restart();
_singletons.Add(keyReader.ReadVUInt32(), valueReader.ReadVUInt64());
}
if (sortTableByNameAsc)
{
_singletons = _singletons.OrderBy(item =>
{
string name;
return(_tableId2Name.TryGetValue(item.Key, out name) ? name : string.Empty);
}).ToDictionary(item => item.Key, item => item.Value);
}
foreach (var singleton in _singletons)
{
string name;
if (_visitor != null &&
!_visitor.VisitSingleton(singleton.Key,
_tableId2Name.TryGetValue(singleton.Key, out name) ? name : null, singleton.Value))
{
continue;
}
MarkTableName(singleton.Key);
_trkv.SetKeyPrefixUnsafe(ObjectDB.TableSingletonsPrefix);
if (_trkv.Find(Vuint2ByteBuffer(singleton.Key)) == FindResult.Exact)
{
_fastVisitor.MarkCurrentKeyAsUsed(_trkv);
}
IterateOid(singleton.Value);
}
foreach (var relation in _relationId2Name)
{
if (_visitor != null && !_visitor.StartRelation(relation.Value))
{
continue;
}
MarkRelationName(relation.Key);
IterateRelation(relation.Key, relation.Value);
if (_visitor != null)
{
_visitor.EndRelation();
}
}
}
internal static IEnumerable <KeyValuePair <uint, string> > LoadRelationNamesEnum(IKeyValueDBTransaction tr)
{
tr.SetKeyPrefixUnsafe(RelationNamesPrefix);
var keyReader = new KeyValueDBKeyReader(tr);
var valueReader = new KeyValueDBValueReader(tr);
while (tr.FindNextKey())
{
keyReader.Restart();
valueReader.Restart();
yield return(new KeyValuePair <uint, string>(valueReader.ReadVUInt32(), keyReader.ReadString()));
}
}
void IterateDict(ulong dictId, IFieldHandler keyHandler, IFieldHandler valueHandler)
{
if (_visitor != null && !_visitor.StartDictionary())
{
return;
}
var o = ObjectDB.AllDictionariesPrefix.Length;
var prefix = new byte[o + PackUnpack.LengthVUInt(dictId)];
Array.Copy(ObjectDB.AllDictionariesPrefix, prefix, o);
PackUnpack.PackVUInt(prefix, ref o, dictId);
_trkv.SetKeyPrefix(prefix);
var protector = _tr.TransactionProtector;
long prevProtectionCounter = 0;
long pos = 0;
while (true)
{
protector.Start();
if (pos == 0)
{
_trkv.SetKeyPrefix(prefix);
if (!_trkv.FindFirstKey())
{
break;
}
}
else
{
if (protector.WasInterupted(prevProtectionCounter))
{
_trkv.SetKeyPrefix(prefix);
if (!_trkv.SetKeyIndex(pos))
{
break;
}
}
else
{
if (!_trkv.FindNextKey())
{
break;
}
}
}
_fastVisitor.MarkCurrentKeyAsUsed(_trkv);
prevProtectionCounter = protector.ProtectionCounter;
if (_visitor == null || _visitor.StartDictKey())
{
var keyReader = new KeyValueDBKeyReader(_trkv);
IterateHandler(keyReader, keyHandler, false, null);
_visitor?.EndDictKey();
}
if (protector.WasInterupted(prevProtectionCounter))
{
_trkv.SetKeyPrefix(prefix);
if (!_trkv.SetKeyIndex(pos))
{
break;
}
}
if (_visitor == null || _visitor.StartDictValue())
{
var valueReader = new KeyValueDBValueReader(_trkv);
IterateHandler(valueReader, valueHandler, false, null);
_visitor?.EndDictValue();
}
pos++;
}
_visitor?.EndDictionary();
}
void IterateRelation(uint relationIndex, string name)
{
var relationVersions = new Dictionary <uint, RelationVersionInfo>();
var lastPersistedVersion = ReadRelationVersions(relationIndex, name, relationVersions);
_tr.TransactionProtector.Start();
var o = ObjectDB.AllRelationsPKPrefix.Length;
var prefix = new byte[o + PackUnpack.LengthVUInt(relationIndex)];
Array.Copy(ObjectDB.AllRelationsPKPrefix, prefix, o);
PackUnpack.PackVUInt(prefix, ref o, relationIndex);
var protector = _tr.TransactionProtector;
long prevProtectionCounter = 0;
long pos = 0;
while (true)
{
protector.Start();
if (pos == 0)
{
_trkv.SetKeyPrefix(prefix);
if (!_trkv.FindFirstKey())
{
break;
}
}
else
{
if (protector.WasInterupted(prevProtectionCounter))
{
_trkv.SetKeyPrefix(prefix);
if (!_trkv.SetKeyIndex(pos))
{
break;
}
}
else
{
if (!_trkv.FindNextKey())
{
break;
}
}
}
_fastVisitor.MarkCurrentKeyAsUsed(_trkv);
prevProtectionCounter = protector.ProtectionCounter;
if (_visitor == null || _visitor.StartRelationKey())
{
var keyReader = new KeyValueDBKeyReader(_trkv);
var relationInfo = relationVersions[lastPersistedVersion];
IterateFields(keyReader, relationInfo.GetPrimaryKeyFields(), null);
_visitor?.EndRelationKey();
}
if (protector.WasInterupted(prevProtectionCounter))
{
_trkv.SetKeyPrefix(prefix);
if (!_trkv.SetKeyIndex(pos))
{
break;
}
}
if (_visitor == null || _visitor.StartRelationValue())
{
var valueReader = new KeyValueDBValueReader(_trkv);
var version = valueReader.ReadVUInt32();
var relationInfo = relationVersions[version];
IterateFields(valueReader, relationInfo.GetValueFields(), new HashSet <int>());
_visitor?.EndRelationValue();
}
pos++;
}
}
