public FindKeyResult FindKey(byte[] keyBuf, int keyOfs, int keyLen, FindKeyStrategy strategy)
{
lock (_log)
{
_log.WriteUInt8((byte)KVReplayOperation.FindKey);
_log.WriteVUInt32(TrIndex);
_log.WriteVInt32(keyLen);
_log.WriteVInt32(keyOfs);
_log.WriteBlock(keyBuf, keyOfs, keyLen);
_log.WriteVUInt32((uint)strategy);
_log.FlushBuffer();
}
return(_tr.FindKey(keyBuf, keyOfs, keyLen, strategy));
}
public static bool CreateKey(this IKeyValueDBTransaction transaction, byte[] keyBuf)
{
return(transaction.FindKey(keyBuf, 0, keyBuf.Length, FindKeyStrategy.Create) == FindKeyResult.Created);
}
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);
}
}
public static bool FindExactKey(this IKeyValueDBTransaction transaction, byte[] keyBuf)
{
return(transaction.FindKey(keyBuf, 0, keyBuf.Length, FindKeyStrategy.ExactMatch) == FindKeyResult.FoundExact);
}
