public void IterateRelation(ODBIteratorRelationInfo relation)
{
var prefix = BuildRelationPrefix(relation.Id);
long prevProtectionCounter = 0;
long pos = 0;
while (true)
{
if (pos == 0)
{
if (!_trkv.FindFirstKey(prefix))
{
break;
}
}
else
{
if (_trkv.CursorMovedCounter != prevProtectionCounter)
{
if (!_trkv.SetKeyIndex(prefix, pos))
{
break;
}
}
else
{
if (!_trkv.FindNextKey(prefix))
{
break;
}
}
}
_fastVisitor.MarkCurrentKeyAsUsed(_trkv);
prevProtectionCounter = _trkv.CursorMovedCounter;
if (_visitor == null || _visitor.StartRelationKey())
{
var keyReader = new SpanReader(_trkv.GetKey().Slice(prefix.Length));
var relationInfo = relation.VersionInfos[relation.LastPersistedVersion];
IterateFields(ref keyReader, relationInfo.PrimaryKeyFields.Span, null);
_visitor?.EndRelationKey();
}
if (_trkv.CursorMovedCounter != prevProtectionCounter)
{
if (!_trkv.SetKeyIndex(prefix, pos))
{
break;
}
}
if (_visitor == null || _visitor.StartRelationValue())
{
var valueReader = new SpanReader(_trkv.GetValue());
var version = valueReader.ReadVUInt32();
var relationInfo = relation.VersionInfos[version];
IterateFields(ref valueReader, relationInfo.Fields.Span, new HashSet <int>());
_visitor?.EndRelationValue();
}
pos++;
}
}
public IEnumerator <TKey> GetEnumerator()
{
long prevProtectionCounter = 0;
var prevModificationCounter = 0;
long pos = 0;
while (true)
{
_keyValueTrProtector.Start();
if (pos == 0)
{
prevModificationCounter = _modificationCounter;
_keyValueTr.SetKeyPrefix(_prefix);
if (!_keyValueTr.FindFirstKey())
{
break;
}
}
else
{
if (_keyValueTrProtector.WasInterupted(prevProtectionCounter))
{
if (prevModificationCounter != _modificationCounter)
{
ThrowModifiedDuringEnum();
}
_keyValueTr.SetKeyPrefix(_prefix);
if (!_keyValueTr.SetKeyIndex(pos))
{
break;
}
}
else
{
if (!_keyValueTr.FindNextKey())
{
break;
}
}
}
prevProtectionCounter = _keyValueTrProtector.ProtectionCounter;
var keyBytes = _keyValueTr.GetKey();
var key = ByteArrayToKey(keyBytes);
yield return(key);
pos++;
}
}
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());
}
/// <summary>
/// Writes all key value pairs in current prefix to stream (prefix itself is not written)
/// </summary>
/// <param name="transaction">transaction from where export all data</param>
/// <param name="stream">where to write it to</param>
public static void Export(IKeyValueDBTransaction transaction, Stream stream)
{
if (transaction == null) throw new ArgumentNullException(nameof(transaction));
if (stream == null) throw new ArgumentNullException(nameof(stream));
if (!stream.CanWrite) throw new ArgumentException("stream must be writeable", nameof(stream));
var keyValueCount = transaction.GetKeyValueCount();
var tempbuf = new byte[16];
tempbuf[0] = (byte)'B';
tempbuf[1] = (byte)'T';
tempbuf[2] = (byte)'D';
tempbuf[3] = (byte)'B';
tempbuf[4] = (byte)'E';
tempbuf[5] = (byte)'X';
tempbuf[6] = (byte)'P';
tempbuf[7] = (byte)'2';
PackUnpack.PackInt64LE(tempbuf, 8, keyValueCount);
stream.Write(tempbuf, 0, 16);
transaction.FindFirstKey();
for (long kv = 0; kv < keyValueCount; kv++)
{
var key = transaction.GetKey();
PackUnpack.PackInt32LE(tempbuf, 0, key.Length);
stream.Write(tempbuf, 0, 4);
stream.Write(key.Buffer, key.Offset, key.Length);
var value = transaction.GetValue();
PackUnpack.PackInt32LE(tempbuf, 0, value.Length);
stream.Write(tempbuf, 0, 4);
stream.Write(value.Buffer, value.Offset, value.Length);
transaction.FindNextKey();
}
}
/// <summary>
/// Writes all key value pairs in current prefix to stream (prefix itself is not written)
/// </summary>
/// <param name="transaction">transaction from where export all data</param>
/// <param name="stream">where to write it to</param>
public static void Export(IKeyValueDBTransaction transaction, Stream stream)
{
if (transaction == null)
{
throw new ArgumentNullException(nameof(transaction));
}
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (!stream.CanWrite)
{
throw new ArgumentException("stream must be writeable", nameof(stream));
}
var keyValueCount = transaction.GetKeyValueCount();
var tempbuf = new byte[16];
tempbuf[0] = (byte)'B';
tempbuf[1] = (byte)'T';
tempbuf[2] = (byte)'D';
tempbuf[3] = (byte)'B';
tempbuf[4] = (byte)'E';
tempbuf[5] = (byte)'X';
tempbuf[6] = (byte)'P';
tempbuf[7] = (byte)'2';
PackUnpack.PackInt64LE(tempbuf, 8, keyValueCount);
stream.Write(tempbuf, 0, 16);
transaction.FindFirstKey(new ReadOnlySpan <byte>());
Span <byte> keyBuffer = stackalloc byte[256];
for (long kv = 0; kv < keyValueCount; kv++)
{
var key = transaction.GetKey(ref MemoryMarshal.GetReference(keyBuffer), keyBuffer.Length);
PackUnpack.PackInt32LE(tempbuf, 0, key.Length);
stream.Write(tempbuf, 0, 4);
stream.Write(key);
var value = transaction.GetValue();
PackUnpack.PackInt32LE(tempbuf, 0, value.Length);
stream.Write(tempbuf, 0, 4);
stream.Write(value);
transaction.FindNextKey(new ReadOnlySpan <byte>());
}
var ulongCount = transaction.GetUlongCount();
if (transaction.GetCommitUlong() != 0 || ulongCount != 0)
{
PackUnpack.PackUInt64LE(tempbuf, 0, transaction.GetCommitUlong());
stream.Write(tempbuf, 0, 8);
}
if (ulongCount != 0)
{
PackUnpack.PackUInt32LE(tempbuf, 0, ulongCount);
stream.Write(tempbuf, 0, 4);
for (var i = 0u; i < ulongCount; i++)
{
PackUnpack.PackUInt64LE(tempbuf, 0, transaction.GetUlong(i));
stream.Write(tempbuf, 0, 8);
}
}
}
/// <summary>
/// Writes all key value pairs in current prefix to stream (prefix itself is not written)
/// </summary>
/// <param name="transaction">transaction from where export all data</param>
/// <param name="stream">where to write it to</param>
public static void Export(IKeyValueDBTransaction transaction, Stream stream)
{
if (transaction == null)
{
throw new ArgumentNullException("transaction");
}
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (!stream.CanWrite)
{
throw new ArgumentException("stream must be writeable", "stream");
}
var keyValueCount = transaction.GetKeyValueCount();
var tempbuf = new byte[16];
tempbuf[0] = (byte)'B';
tempbuf[1] = (byte)'T';
tempbuf[2] = (byte)'D';
tempbuf[3] = (byte)'B';
tempbuf[4] = (byte)'E';
tempbuf[5] = (byte)'X';
tempbuf[6] = (byte)'P';
tempbuf[7] = (byte)'1';
PackUnpack.PackInt64LE(tempbuf, 8, keyValueCount);
stream.Write(tempbuf, 0, 16);
transaction.FindFirstKey();
for (long kv = 0; kv < keyValueCount; kv++)
{
var keySize = transaction.GetKeySize();
PackUnpack.PackInt32LE(tempbuf, 0, keySize);
stream.Write(tempbuf, 0, 4);
long ofs = 0;
while (ofs < keySize)
{
int len;
byte[] buf;
int bufOfs;
transaction.PeekKey((int)ofs, out len, out buf, out bufOfs);
stream.Write(buf, bufOfs, len);
ofs += len;
}
var valueSize = transaction.GetValueSize();
PackUnpack.PackInt64LE(tempbuf, 0, valueSize);
stream.Write(tempbuf, 0, 8);
ofs = 0;
while (ofs < valueSize)
{
int len;
byte[] buf;
int bufOfs;
transaction.PeekValue(ofs, out len, out buf, out bufOfs);
stream.Write(buf, bufOfs, len);
ofs += len;
}
transaction.FindNextKey();
}
}
public IEnumerator <TKey> GetEnumerator()
{
long prevProtectionCounter = 0;
var prevModificationCounter = 0;
long pos = 0;
while (true)
{
if (pos == 0)
{
prevModificationCounter = _modificationCounter;
if (!_keyValueTr.FindFirstKey(_prefix))
{
break;
}
}
else
{
if (_keyValueTr.CursorMovedCounter != prevProtectionCounter)
{
if (prevModificationCounter != _modificationCounter)
{
ThrowModifiedDuringEnum();
}
if (!_keyValueTr.SetKeyIndex(_prefix, pos))
{
break;
}
}
else
{
if (!_keyValueTr.FindNextKey(_prefix))
{
break;
}
}
}
prevProtectionCounter = _keyValueTr.CursorMovedCounter;
var key = CurrentToKey();
yield return(key);
pos++;
}
}
public static bool Enumerate(this IKeyValueDBTransaction transaction)
{
if (transaction.GetKeyIndex() < 0)
{
return(transaction.FindFirstKey());
}
if (transaction.FindNextKey())
{
return(true);
}
transaction.InvalidateCurrentKey();
return(false);
}
/// <summary>
/// Writes all key value pairs in current prefix to stream (prefix itself is not written)
/// </summary>
/// <param name="transaction">transaction from where export all data</param>
/// <param name="stream">where to write it to</param>
public static void Export(IKeyValueDBTransaction transaction, Stream stream)
{
if (transaction == null) throw new ArgumentNullException("transaction");
if (stream == null) throw new ArgumentNullException("stream");
if (!stream.CanWrite) throw new ArgumentException("stream must be writeable", "stream");
var keyValueCount = transaction.GetKeyValueCount();
var tempbuf = new byte[16];
tempbuf[0] = (byte)'B';
tempbuf[1] = (byte)'T';
tempbuf[2] = (byte)'D';
tempbuf[3] = (byte)'B';
tempbuf[4] = (byte)'E';
tempbuf[5] = (byte)'X';
tempbuf[6] = (byte)'P';
tempbuf[7] = (byte)'1';
PackUnpack.PackInt64LE(tempbuf, 8, keyValueCount);
stream.Write(tempbuf, 0, 16);
transaction.FindFirstKey();
for (long kv = 0; kv < keyValueCount; kv++)
{
var keySize = transaction.GetKeySize();
PackUnpack.PackInt32LE(tempbuf, 0, keySize);
stream.Write(tempbuf, 0, 4);
long ofs = 0;
while (ofs < keySize)
{
int len;
byte[] buf;
int bufOfs;
transaction.PeekKey((int)ofs, out len, out buf, out bufOfs);
stream.Write(buf, bufOfs, len);
ofs += len;
}
var valueSize = transaction.GetValueSize();
PackUnpack.PackInt64LE(tempbuf, 0, valueSize);
stream.Write(tempbuf, 0, 8);
ofs = 0;
while (ofs < valueSize)
{
int len;
byte[] buf;
int bufOfs;
transaction.PeekValue(ofs, out len, out buf, out bufOfs);
stream.Write(buf, bufOfs, len);
ofs += len;
}
transaction.FindNextKey();
}
}
void ImportKeysWithPrefix(byte[] prefix, IKeyValueDBTransaction sourceKvTr)
{
sourceKvTr.SetKeyPrefix(prefix);
if (!sourceKvTr.FindFirstKey())
return;
using (var kvtr = _keyValueDb.StartWritingTransaction().Result)
{
kvtr.SetKeyPrefix(prefix);
do
{
//create all keys, instead of value store only byte length of value
kvtr.CreateOrUpdateKeyValue(sourceKvTr.GetKey(), Vuint2ByteBuffer(sourceKvTr.GetStorageSizeOfCurrentKey().Value));
} while (sourceKvTr.FindNextKey());
kvtr.Commit();
}
}
void ImportKeysWithPrefix(byte[] prefix, IKeyValueDBTransaction sourceKvTr)
{
if (!sourceKvTr.FindFirstKey(prefix))
{
return;
}
using (var kvtr = _keyValueDb.StartWritingTransaction().Result)
{
do
{
//create all keys, instead of value store only byte length of value
kvtr.CreateOrUpdateKeyValue(sourceKvTr.GetKey(), Vuint2ByteBuffer(sourceKvTr.GetStorageSizeOfCurrentKey().Value));
} while (sourceKvTr.FindNextKey(prefix));
kvtr.Commit();
}
}
/// <summary>
/// Writes all key value pairs in current prefix to stream (prefix itself is not written)
/// </summary>
/// <param name="transaction">transaction from where export all data</param>
/// <param name="stream">where to write it to</param>
public static void Export(IKeyValueDBTransaction transaction, Stream stream)
{
if (transaction == null)
{
throw new ArgumentNullException(nameof(transaction));
}
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (!stream.CanWrite)
{
throw new ArgumentException("stream must be writeable", nameof(stream));
}
var keyValueCount = transaction.GetKeyValueCount();
var tempbuf = new byte[16];
tempbuf[0] = (byte)'B';
tempbuf[1] = (byte)'T';
tempbuf[2] = (byte)'D';
tempbuf[3] = (byte)'B';
tempbuf[4] = (byte)'E';
tempbuf[5] = (byte)'X';
tempbuf[6] = (byte)'P';
tempbuf[7] = (byte)'2';
PackUnpack.PackInt64LE(tempbuf, 8, keyValueCount);
stream.Write(tempbuf, 0, 16);
transaction.FindFirstKey();
for (long kv = 0; kv < keyValueCount; kv++)
{
var key = transaction.GetKey();
PackUnpack.PackInt32LE(tempbuf, 0, key.Length);
stream.Write(tempbuf, 0, 4);
stream.Write(key.Buffer, key.Offset, key.Length);
var value = transaction.GetValue();
PackUnpack.PackInt32LE(tempbuf, 0, value.Length);
stream.Write(tempbuf, 0, 4);
stream.Write(value.Buffer, value.Offset, value.Length);
transaction.FindNextKey();
}
if (transaction.GetCommitUlong() != 0)
{
PackUnpack.PackUInt64LE(tempbuf, 0, transaction.GetCommitUlong());
stream.Write(tempbuf, 0, 8);
}
}
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++;
}
}
public IEnumerable <object> Enumerate(Type type)
{
if (type == typeof(object))
{
type = null;
}
else if (type != null)
{
AutoRegisterType(type);
}
ulong oid = 0;
ulong finalOid = _owner.GetLastAllocatedOid();
long prevProtectionCounter = 0;
while (true)
{
_keyValueTrProtector.Start();
if (oid == 0)
{
prevProtectionCounter = _keyValueTrProtector.ProtectionCounter;
_keyValueTr.SetKeyPrefix(ObjectDB.AllObjectsPrefix);
if (!_keyValueTr.FindFirstKey())
{
break;
}
}
else
{
if (_keyValueTrProtector.WasInterupted(prevProtectionCounter))
{
_keyValueTr.SetKeyPrefix(ObjectDB.AllObjectsPrefix);
oid++;
var key = BuildKeyFromOid(oid);
var result = _keyValueTr.Find(ByteBuffer.NewSync(key));
if (result == FindResult.Previous)
{
if (!_keyValueTr.FindNextKey())
{
result = FindResult.NotFound;
}
}
if (result == FindResult.NotFound)
{
oid--;
break;
}
}
else
{
if (!_keyValueTr.FindNextKey())
{
break;
}
}
prevProtectionCounter = _keyValueTrProtector.ProtectionCounter;
}
oid = ReadOidFromCurrentKeyInTransaction();
var o = GetObjFromObjCacheByOid(oid);
if (o != null)
{
if (type == null || type.IsInstanceOfType(o))
{
yield return(o);
}
continue;
}
TableInfo tableInfo;
var reader = ReadObjStart(oid, out tableInfo);
if (type != null && !type.IsAssignableFrom(tableInfo.ClientType))
{
continue;
}
var obj = ReadObjFinish(oid, tableInfo, reader);
yield return(obj);
}
if (_dirtyObjSet == null)
{
yield break;
}
var dirtyObjsToEnum = _dirtyObjSet.Where(p => p.Key > oid && p.Key <= finalOid).ToList();
dirtyObjsToEnum.Sort((p1, p2) =>
{
if (p1.Key < p2.Key)
{
return(-1);
}
if (p1.Key > p2.Key)
{
return(1);
}
return(0);
});
foreach (var dObjPair in dirtyObjsToEnum)
{
var obj = dObjPair.Value;
if (type != null && !type.IsInstanceOfType(obj))
{
continue;
}
yield return(obj);
}
}
void FreeContent(IReaderCtx readerCtx, int cfgId)
{
var config = ODBDictionaryConfiguration.Get(cfgId);
var ctx = (DBReaderWithFreeInfoCtx)readerCtx;
if (config.FreeContent == null)
{
var method = ILBuilder.Instance.NewMethod <FreeContentFun>($"IDictFinder_Cfg_{cfgId}");
var ilGenerator = method.Generator;
var readerLoc = ilGenerator.DeclareLocal(typeof(IReaderCtx));
ilGenerator
.Ldarg(0)
.Ldarg(2)
// ReSharper disable once ObjectCreationAsStatement
.Newobj(() => new DBReaderWithFreeInfoCtx(null, null))
.Stloc(readerLoc);
var readerOrCtx = _valueHandler.NeedsCtx() ? (Action <IILGen>?)(il => il.Ldloc(readerLoc)) : null;
_valueHandler.FreeContent(ilGenerator, il => il.Ldarg(1), readerOrCtx);
ilGenerator.Ret();
config.FreeContent = method.Create();
}
var findIDictAction = (FreeContentFun)config.FreeContent;
long prevProtectionCounter = 0;
long pos = 0;
while (true)
{
if (pos == 0)
{
if (!_keyValueTr.FindFirstKey(_prefix))
{
break;
}
}
else
{
if (_keyValueTr.CursorMovedCounter != prevProtectionCounter)
{
if (!_keyValueTr.SetKeyIndex(_prefix, pos))
{
break;
}
}
else
{
if (!_keyValueTr.FindNextKey(_prefix))
{
break;
}
}
}
prevProtectionCounter = _keyValueTr.CursorMovedCounter;
var valueBytes = _keyValueTr.GetValue();
var valueReader = new SpanReader(valueBytes);
findIDictAction(ctx.GetTransaction(), ref valueReader, ctx.DictIds);
pos++;
}
}
public bool FindFirstKey()
{
LogSimpleOperation(KVReplayOperation.FindFirstKey);
return(_tr.FindFirstKey());
}
public bool AnyWithPrefix(ByteBuffer keyBytesPrefix)
{
_transaction.TransactionProtector.Start();
_kvtr.SetKeyPrefix(keyBytesPrefix);
return(_kvtr.FindFirstKey());
}
void FreeContent(IReaderCtx readerCtx, int cfgId)
{
var config = (ODBDictionaryConfiguration)((IInstanceRegistry)readerCtx).FindInstance(cfgId);
var ctx = (DBReaderWithFreeInfoCtx)readerCtx;
if (config.FreeContent == null)
{
var method = ILBuilder.Instance
.NewMethod <Action <IInternalObjectDBTransaction, AbstractBufferedReader, IList <ulong> > >(
$"IDictFinder_Cfg_{cfgId}");
var ilGenerator = method.Generator;
var readerLoc = ilGenerator.DeclareLocal(typeof(IReaderCtx));
ilGenerator
.Ldarg(0)
.Ldarg(1)
.Ldarg(2)
.Newobj(() => new DBReaderWithFreeInfoCtx(null, null, null))
.Stloc(readerLoc);
Action <IILGen> readerOrCtx;
if (_valueHandler.NeedsCtx())
{
readerOrCtx = il => il.Ldloc(readerLoc);
}
else
{
readerOrCtx = il => il.Ldarg(1);
}
_valueHandler.FreeContent(ilGenerator, readerOrCtx);
ilGenerator.Ret();
config.FreeContent = method.Create();
}
var findIDictAction = (Action <IInternalObjectDBTransaction, AbstractBufferedReader, IList <ulong> >)config.FreeContent;
long prevProtectionCounter = 0;
long pos = 0;
while (true)
{
_keyValueTrProtector.Start();
if (pos == 0)
{
_keyValueTr.SetKeyPrefix(_prefix);
if (!_keyValueTr.FindFirstKey())
{
break;
}
}
else
{
if (_keyValueTrProtector.WasInterupted(prevProtectionCounter))
{
_keyValueTr.SetKeyPrefix(_prefix);
if (!_keyValueTr.SetKeyIndex(pos))
{
break;
}
}
else
{
if (!_keyValueTr.FindNextKey())
{
break;
}
}
}
prevProtectionCounter = _keyValueTrProtector.ProtectionCounter;
var valueBytes = _keyValueTr.GetValueAsByteArray();
var valueReader = new ByteArrayReader(valueBytes);
findIDictAction(ctx.GetTransaction(), valueReader, ctx.DictIds);
pos++;
}
}
public bool FindFirstKey()
{
return(_keyValueDBTransaction.FindFirstKey());
}
public AdvancedEnumerator(ODBSet <TKey> owner, AdvancedEnumeratorParam <TKey> param)
{
_owner = owner;
_keyValueTr = _owner._keyValueTr;
_ascending = param.Order == EnumerationOrder.Ascending;
_prevModificationCounter = _owner._modificationCounter;
_prevProtectionCounter = _keyValueTr.CursorMovedCounter;
_keyValueTr.FindFirstKey(_owner._prefix);
var prefixIndex = _keyValueTr.GetKeyIndex();
long startIndex;
long endIndex;
if (param.EndProposition == KeyProposition.Ignored)
{
_keyValueTr.FindLastKey(_owner._prefix);
endIndex = _keyValueTr.GetKeyIndex() - prefixIndex - 1;
}
else
{
var keyBytes = _owner.KeyToByteArray(param.End);
switch (_keyValueTr.Find(keyBytes, (uint)_owner._prefix.Length))
{
case FindResult.Exact:
endIndex = _keyValueTr.GetKeyIndex() - prefixIndex;
if (param.EndProposition == KeyProposition.Excluded)
{
endIndex--;
}
break;
case FindResult.Previous:
endIndex = _keyValueTr.GetKeyIndex() - prefixIndex;
break;
case FindResult.Next:
endIndex = _keyValueTr.GetKeyIndex() - prefixIndex - 1;
break;
case FindResult.NotFound:
endIndex = -1;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
if (param.StartProposition == KeyProposition.Ignored)
{
startIndex = 0;
}
else
{
var keyBytes = _owner.KeyToByteArray(param.Start);
switch (_keyValueTr.Find(keyBytes, (uint)_owner._prefix.Length))
{
case FindResult.Exact:
startIndex = _keyValueTr.GetKeyIndex() - prefixIndex;
if (param.StartProposition == KeyProposition.Excluded)
{
startIndex++;
}
break;
case FindResult.Previous:
startIndex = _keyValueTr.GetKeyIndex() - prefixIndex + 1;
break;
case FindResult.Next:
startIndex = _keyValueTr.GetKeyIndex() - prefixIndex;
break;
case FindResult.NotFound:
startIndex = 0;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
_count = (uint)Math.Max(0, endIndex - startIndex + 1);
_startPos = (uint)(_ascending ? startIndex : endIndex);
_pos = 0;
_seekState = SeekState.Undefined;
}
public IEnumerable <object> Enumerate(Type type)
{
if (type == typeof(object))
{
type = null;
}
else if (type != null)
{
AutoRegisterType(type);
}
var taken = false;
ulong oid = 0;
ulong finalOid = _owner.GetLastAllocatedOid();
long prevProtectionCounter = 0;
try
{
while (true)
{
if (!taken)
{
_keyValueTrProtector.Start(ref taken);
}
if (oid == 0)
{
prevProtectionCounter = _keyValueTrProtector.ProtectionCounter;
_keyValueTr.SetKeyPrefix(ObjectDB.AllObjectsPrefix);
if (!_keyValueTr.FindFirstKey())
{
break;
}
}
else
{
if (_keyValueTrProtector.WasInterupted(prevProtectionCounter))
{
_keyValueTr.SetKeyPrefix(ObjectDB.AllObjectsPrefix);
oid++;
byte[] key = BuildKeyFromOid(oid);
if (_keyValueTr.FindKey(key, 0, key.Length, FindKeyStrategy.OnlyNext) == FindKeyResult.NotFound)
{
oid--;
break;
}
}
else
{
if (!_keyValueTr.FindNextKey())
{
break;
}
}
}
oid = ReadOidFromCurrentKeyInTransaction();
WeakReference weakObj;
if (_objCache.TryGetValue(oid, out weakObj))
{
var o = weakObj.Target;
if (o != null)
{
if (type == null || type.IsAssignableFrom(o.GetType()))
{
_keyValueTrProtector.Stop(ref taken);
yield return(o);
continue;
}
continue;
}
}
TableInfo tableInfo;
KeyValueDBValueReader reader = ReadObjStart(oid, out tableInfo);
if (type != null && !type.IsAssignableFrom(tableInfo.ClientType))
{
continue;
}
object obj = ReadObjFinish(oid, tableInfo, reader);
_keyValueTrProtector.Stop(ref taken);
yield return(obj);
}
}
finally
{
if (taken)
{
_keyValueTrProtector.Stop();
}
}
var dirtyObjsToEnum = _dirtyObjSet.Where(p => p.Key > oid && p.Key <= finalOid).ToList();
dirtyObjsToEnum.Sort((p1, p2) =>
{
if (p1.Key < p2.Key)
{
return(-1);
}
if (p1.Key > p2.Key)
{
return(1);
}
return(0);
});
foreach (var dObjPair in dirtyObjsToEnum)
{
object obj = dObjPair.Value;
if (type != null && !type.IsAssignableFrom(obj.GetType()))
{
continue;
}
yield return(obj);
}
}