C# (CSharp) RecoveryManager.SetByte示例

示例#1

        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);
        }