/// <summary>
/// Clear cache, discard journal file
/// </summary>
public void Rollback()
{
// clear all dirty pages from memory
_cache.DiscardDirtyPages();
_disk.ClearJournal();
}
/// <summary>
/// Encapsulate all operations in a single write transaction
/// </summary>
private T Transaction <T>(string collection, bool addIfNotExists, Func <CollectionPage, T> action)
{
// always starts write operation locking database
using (_locker.Write())
{
try
{
var col = this.GetCollectionPage(collection, addIfNotExists);
var result = action(col);
_trans.PersistDirtyPages();
return(result);
}
catch (Exception ex)
{
_log.Write(Logger.ERROR, ex.Message);
// if an error occurs during an operation, rollback must be called to avoid datafile inconsistent
_cache.DiscardDirtyPages();
throw;
}
}
}
/// <summary>
/// Clear cache, discard journal file
/// </summary>
public void Rollback()
{
// clear all dirty pages from memory
_cache.DiscardDirtyPages();
var header = _pager.GetPage <HeaderPage>(0);
_disk.ClearJournal(header.LastPageID);
}