/// <summary>
/// Get a page from cache or from disk (get from cache or from disk)
/// </summary>
public T GetPage <T>(uint pageID)
where T : BasePage
{
lock (_disk)
{
var page = _cache.GetPage(pageID);
// is not on cache? load from disk
if (page == null)
{
var buffer = _disk.ReadPage(pageID);
// if datafile are encrypted, decrypt buffer (header are not encrypted)
if (_crypto != null && pageID > 0)
{
buffer = _crypto.Decrypt(buffer);
}
page = BasePage.ReadPage(buffer);
_cache.AddPage(page);
}
return((T)page);
}
}
/// <summary>
/// Get a page from cache or from disk (and put on cache)
/// </summary>
public T GetPage <T>(uint pageID)
where T : BasePage
{
// lock concurrency access (read access are not in a lock transaction)
lock (_cache)
{
var page = _cache.GetOrDefault(pageID);
// is not on cache? load from disk
if (page == null)
{
var buffer = _disk.ReadPage(pageID);
// if datafile are encrypted, decrypt buffer (header are not encrypted)
if (_crypto != null && pageID > 0)
{
buffer = _crypto.Decrypt(buffer);
}
page = BasePage.ReadPage(buffer);
_cache.Add(pageID, page);
}
return((T)page);
}
}