public string Duplicate(string id)
{
var lId2 = _nrwl.AcquireWriterLock($"{nameof(ChunkMap)}.{id}");
var lId = _nrwl.AcquireReaderLock($"{nameof(Chunk)}.{id}");
var mapSearch = _maps.Find(x => x.ID == id).ToList();
if (!mapSearch.Any())
{
_nrwl.ReleaseLock($"{nameof(ChunkMap)}.{id}", lId2);
_nrwl.ReleaseLock($"{nameof(Chunk)}.{id}", lId);
throw new MdbfsElementNotFoundException();
} //not found
var map = mapSearch.First();
var nMap = new ChunkMap {
ChunksIDs = new List <string>(), Length = map.Length, Removed = false
};
var chunksSearch = _chunks.Find(Builders <Chunk> .Filter.Where(x => map.ChunksIDs.Contains(x.ID)));
var nChunks = chunksSearch.ToEnumerable().Select(ch => new Chunk {
Bytes = ch.Bytes
}).ToList();
_chunks.InsertMany(nChunks);
nChunks.ForEach(x => nMap.ChunksIDs.Add(x.ID));
_maps.InsertOne(nMap);
_nrwl.ReleaseLock($"{nameof(ChunkMap)}.{id}", lId2);
_nrwl.ReleaseLock($"{nameof(Chunk)}.{id}", lId);
return(nMap.ID);
}
public Element Get(string id)
{
var lId = _nrwl.AcquireReaderLock($"{nameof(Files)}.{id}");
var elemSearch = _elements.Find(x => x.ID == id).ToList();
_nrwl.ReleaseLock($"{nameof(Files)}.{id}", lId);
return(!elemSearch.Any() ? null : elemSearch.First());
}
private static (bool success, ChunkMap map) CreateNewElement(IMongoCollection <ChunkMap> maps, string id, NamedReaderWriterLock nrwl)
{
var map = new ChunkMap {
ID = id, ChunksIDs = new List <string>(), Length = 0
};
var lId = nrwl.AcquireReaderLock($"{nameof(ChunkMap)}.{id}");
using var session = maps.Database.Client.StartSession();
session.StartTransaction();
try
{
if (id != null)
{
if (!maps.Find(x => x.ID == id).Any())
{
map.ID = id;
}
else
{
session.AbortTransaction();
nrwl.ReleaseLock($"{nameof(ChunkMap)}.{id}", lId);
return(false, null);
}
}
maps.InsertOne(map);
session.CommitTransaction();
nrwl.ReleaseLock($"{nameof(ChunkMap)}.{id}", lId);
return(true, map);
}
catch
{
nrwl.ReleaseLock($"{nameof(ChunkMap)}.{id}", lId);
}
session.AbortTransaction();
nrwl.ReleaseLock($"{nameof(ChunkMap)}.{id}", lId);
return(false, null);
}
