public BasePipe(TransactionService transaction, IDocumentLookup lookup, SortDisk tempDisk, EnginePragmas pragmas)
{
_transaction = transaction;
_lookup = lookup;
_tempDisk = tempDisk;
_pragmas = pragmas;
}
/// <summary>
/// Load page content based on page buffer
/// </summary>
public void LoadPage()
{
// check database file format
var info = _buffer.ReadString(P_HEADER_INFO, HEADER_INFO.Length);
var ver = _buffer[P_FILE_VERSION];
if (string.CompareOrdinal(info, HEADER_INFO) != 0 || ver != FILE_VERSION)
{
throw LiteException.InvalidDatabase();
}
// CreateTime is readonly
this.FreeEmptyPageList = _buffer.ReadUInt32(P_FREE_EMPTY_PAGE_ID);
this.LastPageID = _buffer.ReadUInt32(P_LAST_PAGE_ID);
// initialize engine pragmas
this.Pragmas = new EnginePragmas(_buffer, this);
// create new buffer area to store BsonDocument collections
var area = _buffer.Slice(P_COLLECTIONS, COLLECTIONS_SIZE);
using (var r = new BufferReader(new[] { area }, false))
{
_collections = r.ReadDocument();
}
_isCollectionsChanged = false;
}
public FileReaderV7(Stream stream, string password)
{
_stream = stream;
// only userVersion was avaiable in old file format versions
_header = this.ReadPage(0);
this.Pragmas = new EnginePragmas(null);
this.Pragmas.Set("USER_VERSION", _header["userVersion"], true);
if (password == null && _header["salt"].AsBinary.IsFullZero() == false)
{
throw new LiteException(0, "Current data file requires password");
}
else if (password != null)
{
if (_header["salt"].AsBinary.IsFullZero())
{
throw new LiteException(0, "Current data file has no encryption - do not use password");
}
var hash = AesEncryption.HashSHA1(password);
if (hash.SequenceEqual(_header["password"].AsBinary) == false)
{
throw new LiteException(0, "Invalid password");
}
}
_aes = password == null ?
null :
new AesEncryption(password, _header["salt"].AsBinary);
}
/// <summary>
/// Select corrent pipe
/// </summary>
public BasePipe GetPipe(TransactionService transaction, Snapshot snapshot, EnginePragmas pragmas)
{
//if (this.GroupBy == null)
{
return(new QueryPipe(transaction, this.GetLookup(snapshot, pragmas), pragmas));
}
//else
{
// return new GroupByPipe(transaction, this.GetLookup(snapshot, pragmas), tempDisk, pragmas);
}
}
public SortDisk(IStreamFactory factory, int containerSize, EnginePragmas pragmas)
{
ENSURE(containerSize % PAGE_SIZE == 0, "size must be PAGE_SIZE multiple");
_factory = factory;
_containerSize = containerSize;
_pragmas = pragmas;
_lastContainerPosition = -containerSize;
_pool = new Lazy <StreamPool>(() => new StreamPool(_factory, false));
}
public FileReaderV8(HeaderPage header, DiskService disk)
{
// get a copy of pragmas
this.Pragmas = new EnginePragmas(header.UpdateBuffer(), header);
_collections = header.GetCollections().ToDictionary(x => x.Key, x => x.Value);
// using writer stream from pool (no need to return)
_stream = disk.GetPool(FileOrigin.Data).Writer;
_buffer = BufferPool.Rent(PAGE_SIZE);
}
public SortService(SortDisk disk, int order, EnginePragmas pragmas)
{
_disk = disk;
_order = order;
_pragmas = pragmas;
_containerSize = disk.ContainerSize;
_reader = new Lazy <Stream>(() => _disk.GetReader());
var bytes = BufferPool.Rent(disk.ContainerSize);
_buffer = new BufferSlice(bytes, 0, _containerSize);
}
public QueryExecutor(LiteEngine engine, EnginePragmas pragmas, string collection, Query query, IEnumerable <BsonDocument> source)
{
_engine = engine;
_pragmas = pragmas;
_collection = collection;
_query = query;
_cursor = new CursorInfo(collection, query);
LOG(_query.ToSQL(_collection).Replace(Environment.NewLine, " "), "QUERY");
// source will be != null when query will run over external data source, like system collections or files (not user collection)
_source = source;
}
/// <summary>
/// Create new Header Page
/// </summary>
public HeaderPage(PageBuffer buffer, uint pageID)
: base(buffer, 0, PageType.Header)
{
// initialize page version
this.CreationTime = DateTime.UtcNow;
this.FreeEmptyPageList = uint.MaxValue;
this.LastPageID = 0;
// initialize pragmas
this.Pragmas = new EnginePragmas(this);
// writing direct into buffer in Ctor() because there is no change later (write once)
_buffer.Write(HEADER_INFO, P_HEADER_INFO);
_buffer.Write(FILE_VERSION, P_FILE_VERSION);
_buffer.Write(this.CreationTime, P_CREATION_TIME);
// initialize collections
_collections = new BsonDocument();
}
/// <summary>
/// Get corrent IDocumentLookup
/// </summary>
public IDocumentLookup GetLookup(Snapshot snapshot, EnginePragmas pragmas)
{
var data = new DataService(snapshot);
var indexer = new IndexService(snapshot, pragmas.Collation);
// define document loader
// if index are VirtualIndex - it's also lookup document
if (!(this.Index is IDocumentLookup lookup))
{
if (this.IsIndexKeyOnly)
{
lookup = new IndexLookup(indexer, this.Fields.Single());
}
else
{
lookup = new DatafileLookup(data, pragmas.UtcDate, this.Fields);
}
}
return(lookup);
}
public BasePipe(TransactionService transaction, IDocumentLookup lookup, EnginePragmas pragmas)
{
_transaction = transaction;
_lookup = lookup;
_pragmas = pragmas;
}
public QueryPipe(TransactionService transaction, IDocumentLookup loader, SortDisk tempDisk, EnginePragmas pragmas)
: base(transaction, loader, tempDisk, pragmas)
{
}
internal LockService(EnginePragmas pragmas)
{
_pragmas = pragmas;
}
internal LockService(EnginePragmas variables, bool @readonly)
{
_variables = variables;
_readonly = @readonly;
}
