/// <summary>
/// Initialize new datafile with header page + lock reserved area zone
/// </summary>
public static void CreateDatabase(Stream stream, string password = null)
{
// create a new header page in bytes (keep second page empty)
var header = new HeaderPage()
{
LastPageID = 1
};
if (password != null)
{
header.Password = AesEncryption.HashSHA1(password);
header.Salt = AesEncryption.Salt();
}
// point to begin file
stream.Seek(0, SeekOrigin.Begin);
// get header page in bytes
var buffer = header.WritePage();
stream.Write(buffer, 0, BasePage.PAGE_SIZE);
// write second page empty just to use as lock control
stream.Write(new byte[BasePage.PAGE_SIZE], 0, BasePage.PAGE_SIZE);
}
public void Initialize(Logger log, string password)
{
// get log instance to disk
_log = log;
// if stream are empty, create header page and save to stream
if (_stream.Length == 0)
{
_log.Write(Logger.DISK, "initialize new datafile");
// create a new header page in bytes
var header = new HeaderPage();
if (password != null)
{
_log.Write(Logger.DISK, "datafile encrypted");
header.Password = AesEncryption.HashSHA1(password);
header.Salt = AesEncryption.Salt();
}
// write bytes on page
this.WritePage(0, header.WritePage());
}
}
//private Logger _log;
public PageService(IDiskService disk, AesEncryption crypto, CacheService cache, Logger log)
{
_disk = disk;
_crypto = crypto;
_cache = cache;
//_log = log;
}
/// <summary>
/// Initialize LiteEngine using custom disk service implementation and full engine options
/// </summary>
public LiteEngine(IDiskService disk, string password = null, TimeSpan?timeout = null, int cacheSize = 5000, Logger log = null, bool utcDate = false)
{
if (disk == null)
{
throw new ArgumentNullException("disk");
}
_timeout = timeout ?? TimeSpan.FromMinutes(1);
_cacheSize = cacheSize;
_disk = disk;
_log = log ?? new Logger();
_bsonReader = new BsonReader(utcDate);
try
{
// initialize datafile (create) and set log instance
_disk.Initialize(_log, password);
// lock disk (read mode) before read header
var position = _disk.Lock(LockState.Read, _timeout);
var buffer = _disk.ReadPage(0);
_disk.Unlock(LockState.Read, position);
// create header instance from array bytes
var header = BasePage.ReadPage(buffer) as HeaderPage;
// hash password with sha1 or keep as empty byte[20]
var sha1 = password == null ? new byte[20] : AesEncryption.HashSHA1(password);
// compare header password with user password even if not passed password (datafile can have password)
if (sha1.BinaryCompareTo(header.Password) != 0)
{
throw LiteException.DatabaseWrongPassword();
}
// initialize AES encryptor
if (password != null)
{
_crypto = new AesEncryption(password, header.Salt);
}
// initialize all services
this.InitializeServices();
// if header are marked with recovery, do it now
if (header.Recovery)
{
_trans.Recovery();
}
}
catch (Exception)
{
// explicit dispose
this.Dispose();
throw;
}
}
internal TransactionService(IDiskService disk, AesEncryption crypto, PageService pager, int cacheSize, Logger log)
{
_disk = disk;
_crypto = crypto;
_pager = pager;
_cacheSize = cacheSize;
_log = log;
}
internal TransactionService(IDiskService disk, AesEncryption crypto, PageService pager, int cacheSize, Logger log)
{
_disk = disk;
_crypto = crypto;
_pager = pager;
_cacheSize = cacheSize;
_log = log;
}
public void Initialize(Logger log, string password)
{
// get log instance to disk
_log = log;
// if is readonly, journal must be disabled
if (_options.FileMode == FileMode.ReadOnly)
{
_options.Journal = false;
}
// open/create file using readonly/exclusive options
_stream = new FileStream(_filename,
_options.FileMode == FileMode.ReadOnly ? System.IO.FileMode.Open : System.IO.FileMode.OpenOrCreate,
_options.FileMode == FileMode.ReadOnly ? FileAccess.Read : FileAccess.ReadWrite,
_options.FileMode == FileMode.Exclusive ? FileShare.None : FileShare.ReadWrite,
BasePage.PAGE_SIZE);
// if file is new, initialize
if (_stream.Length == 0)
{
_log.Write(Logger.DISK, "initialize new datafile");
// set datafile initial size
_stream.SetLength(_options.InitialSize);
// create a new header page in bytes (keep second page empty)
var header = new HeaderPage()
{
LastPageID = 1
};
if (password != null)
{
_log.Write(Logger.DISK, "datafile encrypted");
header.Password = AesEncryption.HashSHA1(password);
header.Salt = AesEncryption.Salt();
}
// write bytes on page
this.WritePage(0, header.WritePage());
// write second page empty just to use as lock control
this.WritePage(1, new byte[BasePage.PAGE_SIZE]);
}
#if !NET35
// there is no Lock in NetStandard (1.x) - no shared mode
if (_options.FileMode == FileMode.Shared)
{
_options.FileMode = FileMode.Exclusive;
}
#endif
}
/// <summary>
/// Initialize new datafile with header page + lock reserved area zone
/// </summary>
public static void CreateDatabase(Stream stream, string password = null, long initialSize = 0)
{
// calculate how many empty pages will be added on disk
var emptyPages = initialSize == 0 ? 0 : (initialSize - (2 * BasePage.PAGE_SIZE)) / BasePage.PAGE_SIZE;
// if too small size (less than 2 pages), assume no initial size
if (emptyPages < 0)
{
emptyPages = 0;
}
// create a new header page in bytes (keep second page empty)
var header = new HeaderPage
{
LastPageID = initialSize == 0 ? 1 : (uint)emptyPages + 1,
FreeEmptyPageID = initialSize == 0 ? uint.MaxValue : 2
};
if (password != null)
{
header.Password = AesEncryption.HashSHA1(password);
header.Salt = AesEncryption.Salt();
}
// point to begin file
stream.Seek(0, SeekOrigin.Begin);
// get header page in bytes
var buffer = header.WritePage();
stream.Write(buffer, 0, BasePage.PAGE_SIZE);
// write second page as an empty AREA (it's not a page) just to use as lock control
stream.Write(new byte[BasePage.PAGE_SIZE], 0, BasePage.PAGE_SIZE);
// if initial size is defined, lets create empty pages in a linked list
if (emptyPages > 0)
{
stream.SetLength(initialSize);
var pageID = 1u;
while (++pageID < (emptyPages + 2))
{
var empty = new EmptyPage(pageID)
{
PrevPageID = pageID == 2 ? 0 : pageID - 1,
NextPageID = pageID == emptyPages + 1 ? uint.MaxValue : pageID + 1
};
stream.Write(empty.WritePage(), 0, BasePage.PAGE_SIZE);
}
}
}
public void Initialize(Logger log, string password)
{
// get log instance to disk
_log = log;
// if file not exists, just create empty file
if (!File.Exists(_filename))
{
// readonly
if (_options.ReadOnly)
{
throw LiteException.ReadOnlyDatabase();
}
// open file as create mode
_stream = new FileStream(_filename,
FileMode.CreateNew,
FileAccess.ReadWrite,
FileShare.Read,
BasePage.PAGE_SIZE);
_log.Write(Logger.DISK, "initialize new datafile");
// set datafile initial size
_stream.SetLength(_options.InitialSize);
// create a new header page in bytes
var header = new HeaderPage();
if (password != null)
{
_log.Write(Logger.DISK, "datafile encrypted");
header.Password = AesEncryption.HashSHA1(password);
header.Salt = AesEncryption.Salt();
}
// write bytes on page
this.WritePage(0, header.WritePage());
}
else
{
// try open file in exclusive mode
TryExec(() =>
{
_stream = new FileStream(_filename,
FileMode.Open,
_options.ReadOnly ? FileAccess.Read : FileAccess.ReadWrite,
_options.ReadOnly ? FileShare.ReadWrite : FileShare.Read,
BasePage.PAGE_SIZE);
});
}
}
/// <summary>
/// Initialize LiteEngine using custom disk service implementation and full engine options
/// </summary>
public LiteEngine(IDiskService disk, string password = null, TimeSpan?timeout = null, int cacheSize = 5000, Logger log = null)
{
if (disk == null)
{
throw new ArgumentNullException("disk");
}
_timeout = timeout ?? TimeSpan.FromMinutes(1);
_cacheSize = cacheSize;
_disk = disk;
_log = log ?? new Logger();
try
{
// initialize datafile (create) and set log instance
_disk.Initialize(_log, password);
// read header page
var header = BasePage.ReadPage(_disk.ReadPage(0)) as HeaderPage;
// hash password with sha1 or keep as empty byte[20]
var sha1 = password == null ? new byte[20] : AesEncryption.HashSHA1(password);
// compare header password with user password even if not passed password (datafile can have password)
if (sha1.BinaryCompareTo(header.Password) != 0)
{
throw LiteException.DatabaseWrongPassword();
}
// initialize AES encryptor
if (password != null)
{
_crypto = new AesEncryption(password, header.Salt);
}
// initialize all services
this.InitializeServices();
// try recovery if has journal file
_trans.Recovery();
}
catch (Exception)
{
// explicit dispose
this.Dispose();
throw;
}
}
/// <summary>
/// Initialize LiteEngine using custom disk service implementation and full engine options
/// </summary>
public LiteEngine(IDiskService disk, string password = null, TimeSpan? timeout = null, bool autocommit = true, int cacheSize = 5000, Logger log = null)
{
_timeout = timeout ?? TimeSpan.FromMinutes(1);
_cacheSize = cacheSize;
_autocommit = autocommit;
_disk = disk;
_log = log ?? new Logger();
_locker = new Locker(_timeout);
// initialize datafile (create) and set log instance
_disk.Initialize(_log, password);
// read header page
var header = BasePage.ReadPage(_disk.ReadPage(0)) as HeaderPage;
// hash password with sha1 or keep as empty byte[20]
var sha1 = password == null ? new byte[20] : AesEncryption.HashSHA1(password);
// compare header password with user password even if not passed password (datafile can have password)
if (sha1.BinaryCompareTo(header.Password) != 0)
{
// explicit dispose
_disk.Dispose();
throw LiteException.DatabaseWrongPassword();
}
// initialize AES encryptor
if (password != null)
{
_crypto = new AesEncryption(password, header.Salt);
}
// initialize all services
this.InitializeServices();
if (_disk.IsJournalEnabled)
{
// try recovery if has journal file
_trans.Recovery();
}
}
public PageService(IDiskService disk, AesEncryption crypto, Logger log)
{
_disk = disk;
_crypto = crypto;
_log = log;
}
