public void SPT_TestReadWriteTable()
{
int entryCount = 40;
int physicalPageDistance = 5;
string dataFile = "SPT_TestData1.tpdb";
if (File.Exists(dataFile))
{
File.Delete(dataFile);
}
List <int> freedPages = null;
StoragePageManager spaceMgr = new StoragePageManager();
StoragePageTable pageTable2 = new StoragePageTable();
StoragePageTable pageTable = new StoragePageTable();
for (int idx = 0; idx < entryCount; idx++)
{
pageTable.SetLogicalPage(idx + physicalPageDistance);
}
using (FileStreamWrapper dataFileStream = FileStreamWrapper.CreateObject(dataFile))
{
int root = pageTable.WritePageTableData(dataFileStream, spaceMgr, out freedPages);
dataFileStream.Seek(0, SeekOrigin.Begin);
pageTable2.ReadPageTableData(dataFileStream, root);
}
for (int idx = 0; idx < entryCount; idx++)
{
int physicalAddress = pageTable2.GetPhysicalPage(idx);
Assert.AreEqual(idx + physicalPageDistance, physicalAddress);
}
}
/// <summary>
/// Remarks:
/// No locking needed beause this method cannot be invoked on the object.
/// It is only called during initialization before the object is returned
/// from the object factory method.
/// </summary>
/// <param name="filePath"></param>
private void Init(string filePath)
{
// open the file
this.dataFile = FileStreamWrapper.CreateObject(filePath);
DBHdr dbRoot = this.ReadDBRoot();
if (null == dbRoot)
{
// setup the data file
this.InitializeDataFile();
// flush the file
this.dataFile.Flush(true);
}
else
{
// read the prepared transaction data
this.preparedContextMap.ReadTransactionTableData(
this.dataFile, dbRoot.PrepedTransactions);
// read the data manager
this.pageManager.ReadPageManagerData(
this.dataFile, dbRoot.PageManager);
}
}
public void SP_TestReadWritePage()
{
string dataFile = "SP_TestData1.tpdb";
if (File.Exists(dataFile))
{
File.Delete(dataFile);
}
TestData[] pageData =
{
new TestData {
data = "Record_0", recordIdx = 0
},
new TestData {
data = "Record_1", recordIdx = 1
},
new TestData {
data = "Record_2", recordIdx = 2
}
};
int pageIndex = int.MinValue;
// write the page
using (FileStreamWrapper dataFileStream = FileStreamWrapper.CreateObject(dataFile))
{
// populate the page with some data
StoragePage page = new StoragePage();
AddRecords(page, pageData);
// write the file to disk
pageIndex = page.WritePageData(dataFileStream, -1);
}
// read the page
using (FileStreamWrapper dataFileStream = FileStreamWrapper.CreateObject(dataFile))
{
// read page from file
StoragePage page = new StoragePage();
page.ReadPageData(dataFileStream, pageIndex);
// validate the page data
ReadRecords(page, pageData);
}
}
