public void CanSetByte() { var page = _fileManager.ResolvePage(); var block = new Block(RandomFilename, 0); page.Read(block); page.SetByte(0, 32); page.Write(block); _recoveryManager = new RecoveryManager(_bufferManager, _logManager, 6); var buffer = _bufferManager.Pin(block); var lsn = _recoveryManager.SetByte(buffer, 0, 123); _logManager.Flush(lsn); _bufferManager.Unpin(buffer); _bufferManager.FlushAll(6); var enumerator = _logManager.GetEnumerator(); var record = enumerator.Current; var setBoolRecord = new SetByteRecord(_logManager, _bufferManager, record); Assert.AreEqual(LogRecordType.SetByte, setBoolRecord.Type); Assert.AreEqual(0, setBoolRecord.Block.Id); Assert.AreEqual(0, setBoolRecord.Offset); Assert.AreEqual(32, setBoolRecord.Value); Assert.AreEqual(6, setBoolRecord.TransactionNumber); }
public bool SetByte(Block block, int offset, byte value) { _concurrencyManager.ExclusiveLock(block); var buffer = _bufferList.GetBuffer(block); int lsn = _recoveryManager.SetByte(buffer, offset, value); return(buffer.SetByte(offset, value, _transactionNumber, lsn)); }
public void CanSetTempByte() { var page = _fileManager.ResolvePage(); var block = new Block("temp" + RandomFilename, 0); page.Read(block); page.SetByte(0, 123); page.Write(block); _recoveryManager = new RecoveryManager(_bufferManager, _logManager, 6); var buffer = _bufferManager.Pin(block); var lsn = _recoveryManager.SetByte(buffer, 0, 123); Assert.AreEqual(-1, lsn); }
public void CanRecoverFromUncommitedAndCommitedTransactions() { var page = _fileManager.ResolvePage(); var block = new Block(RandomFilename, 0); page.Read(block); page.SetInt(0, 222); page.Write(block); var startRecord = new StartRecord(_logManager, _bufferManager, 1); var lsn = startRecord.WriteToLog(); _logManager.Flush(lsn); var startRecord2 = new StartRecord(_logManager, _bufferManager, 2); var lsn2 = startRecord2.WriteToLog(); _logManager.Flush(lsn2); _recoveryManager = new RecoveryManager(_bufferManager, _logManager, 1); var buffer = _bufferManager.Pin(block); _recoveryManager.SetInt(buffer, 0, 123); _recoveryManager.SetByte(buffer, 0, 1); _recoveryManager.Commit(); var recoveryManager2 = new RecoveryManager(_bufferManager, _logManager, 2); recoveryManager2.SetByte(buffer, 1, 0); Assert.DoesNotThrow(() => { recoveryManager2.Recover(); _bufferManager.Unpin(buffer); }); page.Read(block); _ = page.GetInt(0, out var resultValue); Assert.AreEqual(222, resultValue); }