private BinaryUploadStream(IMongoCollection <ChunkMap> maps, IMongoCollection <Chunk> chunks, int maxChunkLength,
NamedReaderWriterLock namedReaderWriterLock)
{
_maps = maps;
_chunks = chunks;
_maxChunkLength = maxChunkLength;
_nrwl = namedReaderWriterLock;
_writeBuffer = new byte[0];
}
public Files(IMongoCollection <Element> elements, int binaryStorageBufferLength = 1024, int chunkSize = 1048576)
{
_elements = elements;
_nrwl = new NamedReaderWriterLock();
_binaryStorage = new BinaryStorageClient(_nrwl, elements.Database, binaryStorageBufferLength, chunkSize);
var tmp0 = _binaryStorage.CleanUpErrors();
foreach (var map in tmp0)
{
_elements.DeleteOne(x => x.ID == map.ID);
}
}
public BinaryStorageClient(NamedReaderWriterLock nrwl, IMongoDatabase database,
int bufforLength = 1024, int maxChunkLength = 1048576)
{
//set database
//set collections
_chunks = database.GetCollection <Chunk>(nameof(MDBFS) + '.' + nameof(Filesystem) + '.' +
nameof(BinaryStorageClient) + nameof(_chunks));
_maps = database.GetCollection <ChunkMap>(nameof(MDBFS) + '.' + nameof(Filesystem) + '.' +
nameof(BinaryStorageClient) + nameof(_maps));
_bufforLength = bufforLength;
_maxChunkLenght = maxChunkLength;
_nrwl = nrwl;
}
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($"{nameof(ChunkMap)}.{id}", lId);
return(false, null);
}
public static async Task <(bool success, BinaryUploadStream stream)> OpenAsync(IMongoCollection <ChunkMap> maps,
IMongoCollection <Chunk> chunks, int maxChunkLenght, string id, NamedReaderWriterLock namedReaderWriterLock)
{
if (id != null)
{
}
var(success, map) = await CreateNewElementAsync(maps, id, namedReaderWriterLock);
if (!success)
{
return(false, null);
}
var stream = new BinaryUploadStream(maps, chunks, maxChunkLenght, namedReaderWriterLock)
{
_map = map
};
stream._nrwlID = await namedReaderWriterLock.AcquireWriterLockAsync($"{nameof(Chunk)}.{map.ID}");
return(true, stream);
}
private static async Task <(bool success, ChunkMap map)> CreateNewElementAsync(IMongoCollection <ChunkMap> maps,
string id, NamedReaderWriterLock nrwl)
{
var map = new ChunkMap {
ID = id, ChunksIDs = new List <string>(), Length = 0
};
var lId = await nrwl.AcquireReaderLockAsync($"{nameof(ChunkMap)}.{id}");
using var session = await maps.Database.Client.StartSessionAsync();
session.StartTransaction();
try
{
if (id != null)
{
if (!await(await maps.FindAsync(x => x.ID == id)).AnyAsync())
{
map.ID = id;
}
else
{
await nrwl.ReleaseLockAsync($"{nameof(ChunkMap)}.{id}", lId);
return(false, null);
}
}
await maps.InsertOneAsync(map);
await session.CommitTransactionAsync();
await nrwl.ReleaseLockAsync($"{nameof(ChunkMap)}.{id}", lId);
return(true, map);
}
catch (Exception)
{
await nrwl.ReleaseLockAsync($"{nameof(ChunkMap)}.{id}", lId);
}
await session.AbortTransactionAsync();
await nrwl.ReleaseLockAsync($"{nameof(ChunkMap)}.{id}", lId);
return(false, null);
}
