public void CanCreateAndDisposeLogEnumerator()
{
_recoveryManager = new RecoveryManager(_bufferManager, _logManager, 5);
var block = new Block(RandomFilename, 0);
var buffer = _bufferManager.Pin(block);
_recoveryManager.SetInt(buffer, 12, 12);
_recoveryManager.Commit();
Assert.DoesNotThrow(() =>
{
_enumerator = new LogRecordEnumerator(_logManager, _bufferManager);
_enumerator.Dispose();
});
}
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);
}
public void CanCommit()
{
_recoveryManager = new RecoveryManager(_bufferManager, _logManager, 6);
var block = new Block(RandomFilename, 0);
var buffer = _bufferManager.Pin(block);
_recoveryManager.Commit();
_bufferManager.Unpin(buffer);
_bufferManager.FlushAll(6);
var page = _fileManager.ResolvePage();
_ = page.Read(new Block(_name, 0));
var enumerator = _logManager.GetEnumerator();
var record = enumerator.Current;
var commitRecord = new CommitRecord(_logManager, _bufferManager, record);
Assert.AreEqual(LogRecordType.Commit, commitRecord.Type);
Assert.AreEqual(6, commitRecord.TransactionNumber);
}
public void Commit()
{
_bufferList.UnpinAll();
_recoveryManager.Commit();
_concurrencyManager.Release();
}
