public void CanPinAllBuffers()
{
_poolStrategy = new LRUBufferPoolStrategy(_logManager, _fileManager, 3);
_bufferManager = new BufferManager(_fileManager, _logManager, _poolStrategy, null, null);
var filename = RandomFilename;
var block1 = new Block(filename, 0);
var block2 = new Block(filename, 1);
var block3 = new Block(filename, 2);
var buffer1 = _bufferManager.Pin(block1);
var buffer2 = _bufferManager.Pin(block2);
var buffer3 = _bufferManager.Pin(block3);
Assert.IsTrue(buffer1.IsPinned);
Assert.IsTrue(buffer2.IsPinned);
Assert.IsTrue(buffer3.IsPinned);
Assert.AreEqual(filename, buffer1.Block.Filename);
Assert.AreEqual(0, buffer1.Block.Id);
Assert.AreEqual(filename, buffer2.Block.Filename);
Assert.AreEqual(1, buffer2.Block.Id);
Assert.AreEqual(filename, buffer3.Block.Filename);
Assert.AreEqual(2, buffer3.Block.Id);
Assert.AreEqual(0, _bufferManager.Available);
}
public void CannotPinMoreBuffersThatIsOnPool()
{
_poolStrategy = new LRUBufferPoolStrategy(_logManager, _fileManager, 3);
_bufferManager = new BufferManager(_fileManager, _logManager, _poolStrategy, TimeSpan.FromMilliseconds(500), TimeSpan.FromMilliseconds(100));
var filename = RandomFilename;
var block1 = new Block(filename, 0);
var block2 = new Block(filename, 1);
var block3 = new Block(filename, 2);
var block4 = new Block(filename, 3);
var buffer1 = _bufferManager.Pin(block1);
var buffer2 = _bufferManager.Pin(block2);
var buffer3 = _bufferManager.Pin(block3);
Assert.IsTrue(buffer1.IsPinned);
Assert.IsTrue(buffer2.IsPinned);
Assert.IsTrue(buffer3.IsPinned);
Assert.AreEqual(filename, buffer1.Block.Filename);
Assert.AreEqual(0, buffer1.Block.Id);
Assert.AreEqual(filename, buffer2.Block.Filename);
Assert.AreEqual(1, buffer2.Block.Id);
Assert.AreEqual(filename, buffer3.Block.Filename);
Assert.AreEqual(2, buffer3.Block.Id);
Assert.Throws <BufferBusyException>(() =>
{
var buffer4 = _bufferManager.Pin(block4);
});
Assert.AreEqual(0, _bufferManager.Available);
}
public void CanPinBufferMultipleTimesAndUnpinMultipleTimes()
{
_poolStrategy = new LRUBufferPoolStrategy(_logManager, _fileManager, 3);
_bufferManager = new BufferManager(_fileManager, _logManager, _poolStrategy, null, null);
var filename = RandomFilename;
var pageFormatter = new BasePageFormatter();
var buffer1 = _bufferManager.PinNew(filename, pageFormatter);
Assert.IsTrue(buffer1.IsPinned);
Assert.AreEqual(2, _bufferManager.Available);
var buffer2 = _bufferManager.Pin(buffer1.Block);
Assert.IsTrue(buffer2.IsPinned);
Assert.AreEqual(2, _bufferManager.Available);
_bufferManager.Unpin(buffer1);
Assert.IsTrue(buffer1.IsPinned);
Assert.AreEqual(2, _bufferManager.Available);
_bufferManager.Unpin(buffer2);
Assert.IsFalse(buffer2.IsPinned);
Assert.AreEqual(3, _bufferManager.Available);
}
public void Pin(Block block)
{
var buffer = _bufferManager.Pin(block);
_buffers.TryAdd(block, buffer);
_pins.Add(block);
}
public void CanPinSameBufferMultipleTimes()
{
_poolStrategy = new LRUBufferPoolStrategy(_logManager, _fileManager, 3);
_bufferManager = new BufferManager(_fileManager, _logManager, _poolStrategy, null, null);
var filename = RandomFilename;
var block = new Block(filename, 0);
var buffer1 = _bufferManager.Pin(block);
var buffer2 = _bufferManager.Pin(block);
Assert.IsTrue(buffer1.IsPinned);
Assert.IsTrue(buffer2.IsPinned);
Assert.AreEqual(filename, buffer1.Block.Filename);
Assert.AreEqual(0, buffer1.Block.Id);
Assert.AreEqual(filename, buffer2.Block.Filename);
Assert.AreEqual(0, buffer2.Block.Id);
Assert.AreEqual(2, _bufferManager.Available);
}
public void CanPinBuffer()
{
_buffersList = new TransactionBuffersList(_bufferManager);
_ = _fileManager.Append(RandomFilename, out var block);
Assert.DoesNotThrow(() =>
{
_bufferManager.Pin(block);
});
}
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 CanRecover()
{
_recoveryManager = new RecoveryManager(_bufferManager, _logManager, 6);
var block = new Block(RandomFilename, 0);
var buffer = _bufferManager.Pin(block);
_recoveryManager.Recover();
_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 checkpointRecord = new CheckpointRecord(_logManager, _bufferManager, record);
Assert.AreEqual(LogRecordType.Checkpoint, checkpointRecord.Type);
Assert.AreEqual(1, checkpointRecord.Transactions.Length);
Assert.AreEqual(6, checkpointRecord.Transactions[0]);
}