public List <byte[]> GetValuesNext(ISnapshot snapshot, byte[] key, long limit)
{
List <byte[]> result = new List <byte[]>();
if (limit <= 0)
{
return(result);
}
Dictionary <WrappedByteArray, WrappedByteArray> collection = new Dictionary <WrappedByteArray, WrappedByteArray>(new WrapperdByteArrayEqualComparer());
if (snapshot.GetPrevious() != null)
{
((Snapshot)(snapshot)).Collect(collection);
}
Dictionary <byte[], byte[]> db_dictonary =
new Dictionary <byte[], byte[]>((((Common.LevelDB)((SnapshotRoot)snapshot.GetRoot()).DB).DB.GetNext(key, limit)));
foreach (KeyValuePair <WrappedByteArray, WrappedByteArray> pair in collection)
{
db_dictonary.Add(pair.Key.Data, pair.Value.Data);
}
return(db_dictonary
.OrderBy(x => x.Key, new UnsignedByteArrayCompare())
.Where(y => ByteUtil.Compare(y.Key, key) >= 0)
.Take((int)limit)
.Select(z => z.Value)
.ToList());
}
public Snapshot(ISnapshot snapshot)
{
this.root = snapshot.GetRoot();
this.previous = snapshot;
snapshot.SetNext(this);
lock (this)
{
this.db = new HashDB();
}
}
private void CreateCheckPoint()
{
// Do not use compare
Dictionary <byte[], byte[]> batch = new Dictionary <byte[], byte[]>();
foreach (RevokingDBWithCaching db in this.databases)
{
ISnapshot head = db.GetHead();
if (Snapshot.IsRoot(head))
{
return;
}
string db_name = db.DBName;
ISnapshot next = head.GetRoot();
for (int i = 0; i < this.flush_count; ++i)
{
next = next.GetNext();
Snapshot snapshot = (Snapshot)next;
IBaseDB <Common.Key, Common.Value> key_value_db = snapshot.DB;
foreach (KeyValuePair <Common.Key, Common.Value> pair in key_value_db)
{
byte[] name = SimpleEncode(db_name);
byte[] key = new byte[name.Length + pair.Key.Data.Length];
Array.Copy(name, 0, key, 0, name.Length);
Array.Copy(pair.Key.Data, 0, key, name.Length, pair.Key.Data.Length);
batch.Add(key, pair.Value.Encode());
}
}
}
// TODO : temp 계속 저장만 하는지 확인해야봐야함
CheckTempStore.Instance.DBSource.UpdateByBatch(batch, new WriteOptions()
{
Sync = Args.Instance.Storage.Sync
});
}
