public void TestPageReadFromStreamIsNotWriteable()
{
byte[] pageData = MakeTestPage(1, 1, 0, 0);
var ms = new MemoryStream(pageData);
var p = new BinaryFilePage(ms, 1ul, 16, 2ul, false);
Assert.That(p.IsWriteable, Is.False);
}
private BinaryFilePage GetPage(ulong pageId, BrightstarProfiler profiler)
{
using (profiler.Step("PageStore.GetPage"))
{
lock (_pageCacheLock)
{
BinaryFilePage page;
Tuple <BinaryFilePage, ulong> modifiedPage;
if (_modifiedPages.TryGetValue(pageId, out modifiedPage))
{
profiler.Incr("PageCache Hit");
return(modifiedPage.Item1);
}
page = PageCache.Instance.Lookup(_filePath, pageId) as BinaryFilePage;
if (page != null)
{
profiler.Incr("PageCache Hit");
return(page);
}
using (profiler.Step("Load Page"))
{
profiler.Incr("PageCache Miss");
page = new BinaryFilePage(_inputStream, pageId, _nominalPageSize);
PageCache.Instance.InsertOrUpdate(_filePath, page);
}
return(page);
}
}
}
internal void OnPageModified(BinaryFilePage page)
{
_modifiedPages.AddOrUpdate(page.Id, true, (k, v) => true);
if (_backgroundPageWriter != null)
{
_backgroundPageWriter.QueueWrite(page, _writeTxnId);
}
}
public void TestCreateFromStream()
{
byte[] pageData = MakeTestPage(1, 1, 0, 0);
var ms = new MemoryStream(pageData);
var p = new BinaryFilePage(ms, 1ul, 16, 2ul, false);
Assert.That(p.FirstTransactionId, Is.EqualTo(1ul));
Assert.That(BitConverter.ToUInt64(p.FirstBuffer, 0), Is.EqualTo(1ul));
Assert.That(p.SecondTransactionId, Is.EqualTo(0ul));
Assert.That(BitConverter.ToUInt64(p.SecondBuffer, 0), Is.EqualTo(0ul));
}
public void TestWriteToPage()
{
byte[] pageData = MakeTestPage(1, 1, 0, 0);
var ms = new MemoryStream(pageData);
var p = new BinaryFilePage(ms, 1ul, 16, 2ul, false);
p.MakeWriteable(2ul);
p.SetData(BitConverter.GetBytes(2ul));
// Data should get written into the second buffer
Assert.That(BitConverter.ToUInt64(p.SecondBuffer, 0), Is.EqualTo(2ul));
}
public BinaryPageAdapter(BinaryFilePageStore store, BinaryFilePage page, ulong currentTransactionId, bool isModified)
{
_store = store;
_page = page;
_isModified = isModified;
if (_page.FirstTransactionId > currentTransactionId && _page.SecondTransactionId > currentTransactionId)
{
// This is an error condition that would happen if a store is kept open while two successive writes are committed
throw new ReadWriteStoreModifiedException();
}
_data = isModified ? _page.GetWriteBuffer(currentTransactionId) : _page.GetReadBuffer(currentTransactionId);
}
public IPage Create(ulong commitId)
{
if (!CanWrite)
{
throw new InvalidOperationException("Cannot create new pages in a read-only store.");
}
var page = new BinaryFilePage(_nextPageId++, _nominalPageSize, _writeTxnId);
_modifiedPages.AddOrUpdate(page.Id, true, (k, v) => true);
PageCache.Instance.InsertOrUpdate(_partitionId, page);
return(page);
}
public BinaryPageAdapter(BinaryFilePageStore store, BinaryFilePage page, ulong currentTransactionId, bool isModified)
{
_store = store;
_page = page;
_isModified = isModified;
if (_page.FirstTransactionId > currentTransactionId && _page.SecondTransactionId > currentTransactionId)
{
// This is an error condition that would happen if a store is kept open while two successive writes are committed
throw new ReadWriteStoreModifiedException();
}
_data = isModified ? _page.GetWriteBuffer(currentTransactionId) : _page.GetReadBuffer(currentTransactionId);
}
public void TestMakePageWriteable()
{
byte[] pageData = MakeTestPage(1, 1, 0, 0);
var ms = new MemoryStream(pageData);
var p = new BinaryFilePage(ms, 1ul, 16, 2ul, false);
p.MakeWriteable(2ul);
// Data in first buffer should be copied to second buffer
Assert.That(p.FirstTransactionId, Is.EqualTo(1ul));
Assert.That(BitConverter.ToUInt64(p.FirstBuffer, 0), Is.EqualTo(1ul));
Assert.That(p.SecondTransactionId, Is.EqualTo(2ul));
Assert.That(BitConverter.ToUInt64(p.SecondBuffer, 0), Is.EqualTo(1ul));
}
/// <summary>
/// Creates a new empty page in the page store
/// </summary>
/// <param name="commitId"></param>
/// <returns>The new page</returns>
public IPage Create(ulong commitId)
{
if (_isReadOnly)
{
throw new InvalidOperationException("Cannot create new pages in a read-only store.");
}
lock (_pageCacheLock)
{
var page = new BinaryFilePage(_nextPageId++, _nominalPageSize, CurrentTransactionId);
_modifiedPages.Add(page.Id, new Tuple <BinaryFilePage, ulong>(page, commitId));
return(new BinaryPageAdapter(this, page, commitId, true));
}
}
/// <summary>
/// Creates a new empty page in the page store
/// </summary>
/// <returns>The ID of the new page</returns>
public ulong Create()
{
if (_isReadOnly)
{
throw new InvalidOperationException("Cannot create new pages in a read-only store.");
}
lock (_pageCacheLock)
{
var page = new BinaryFilePage(_nextPageId++, _nominalPageSize, CurrentTransactionId);
_modifiedPages.Add(page.Id, page);
return(page.Id);
}
}
/// <summary>
/// Creates a new empty page in the page store
/// </summary>
/// <param name="commitId"></param>
/// <returns>The new page</returns>
public IPage Create(ulong commitId)
{
if (_isReadOnly)
{
throw new InvalidOperationException("Cannot create new pages in a read-only store.");
}
lock (_pageCacheLock)
{
var page = new BinaryFilePage(_nextPageId++, _nominalPageSize, CurrentTransactionId);
_modifiedPages.Add(page.Id, new Tuple<BinaryFilePage, ulong>(page, commitId));
return new BinaryPageAdapter(this, page, commitId, true);
}
}
internal void OnPageModified(BinaryFilePage page)
{
_modifiedPages.AddOrUpdate(page.Id, true, (k, v) => true);
}
public IPage Create(ulong commitId)
{
if (!CanWrite)
{
throw new InvalidOperationException("Cannot create new pages in a read-only store.");
}
var page = new BinaryFilePage(_nextPageId++, _nominalPageSize, _writeTxnId);
_modifiedPages.AddOrUpdate(page.Id, true, (k, v) => true);
PageCache.Instance.InsertOrUpdate(_partitionId, page);
return page;
}
public void TestNewPageIsWriteable()
{
var p = new BinaryFilePage(1ul, 16, 1ul);
Assert.That(p.IsWriteable);
}
private BinaryFilePage GetPage(ulong pageId, BrightstarProfiler profiler)
{
using (profiler.Step("PageStore.GetPage"))
{
lock (_pageCacheLock)
{
BinaryFilePage page;
Tuple<BinaryFilePage, ulong> modifiedPage;
if (_modifiedPages.TryGetValue(pageId, out modifiedPage))
{
profiler.Incr("PageCache Hit");
return modifiedPage.Item1;
}
page = PageCache.Instance.Lookup(_filePath, pageId) as BinaryFilePage;
if (page != null)
{
profiler.Incr("PageCache Hit");
return page;
}
using (profiler.Step("Load Page"))
{
profiler.Incr("PageCache Miss");
page = new BinaryFilePage(_inputStream, pageId, _nominalPageSize);
PageCache.Instance.InsertOrUpdate(_filePath, page);
}
return page;
}
}
}
internal void OnPageModified(BinaryFilePage page)
{
_modifiedPages.AddOrUpdate(page.Id, true, (k, v) => true);
}
/// <summary>
/// Creates a new empty page in the page store
/// </summary>
/// <returns>The ID of the new page</returns>
public ulong Create()
{
if (_isReadOnly)
{
throw new InvalidOperationException("Cannot create new pages in a read-only store.");
}
lock (_pageCacheLock)
{
var page = new BinaryFilePage(_nextPageId++, _nominalPageSize, CurrentTransactionId);
_modifiedPages.Add(page.Id, page);
return page.Id;
}
}
internal void OnPageModified(BinaryFilePage page)
{
_modifiedPages.AddOrUpdate(page.Id, true, (k, v) => true);
_backgroundPageWriter.QueueWrite(page, _writeTxnId);
}
