/// <summary>
/// Begin transaction and open the ObjectServer in the specified path/filename
/// </summary>
/// <param name="serverFilename"></param>
/// <param name="serverProfile"></param>
/// <returns></returns>
public static ObjectServerWithTransaction BeginOpenServer(string serverFilename, Preferences preferences)
{
ObjectServerWithTransaction r = RollbackAll(serverFilename, preferences, false);
if (r != null)
{
if (r.Transaction == null)
{
string serverRootPath = Path.GetDirectoryName(serverFilename);
if (string.IsNullOrEmpty(serverRootPath))
{
serverRootPath = System.Environment.CurrentDirectory;
}
TransactionRoot root = TransactionRoot.BeginRoot(serverRootPath);
root.Server = r;
r.Transaction = root;
root.Begin(true);
}
}
else
{
string serverRootPath = Path.GetDirectoryName(serverFilename);
if (string.IsNullOrEmpty(serverRootPath))
{
serverRootPath = System.Environment.CurrentDirectory;
}
TransactionRoot root = TransactionRoot.BeginRoot(serverRootPath);
root.IsDisposing = true;
r = new Sop.ObjectServerWithTransaction(serverFilename, root, preferences);
ITransactionLogger trans = root.Begin(true);
trans.IsDisposing = true;
}
return(r);
}
/// <summary>
/// Rollback uncomitted transactions.
/// NOTE: this should be invoked upon restart so uncommited transaction(s)
/// when program quits in previous run can be rolled back.
/// </summary>
/// <param name="serverFilename"> </param>
/// <param name="serverProfile"> </param>
/// <param name="createOpenObjectServerIfNoRollbackLog"> </param>
public static Sop.ObjectServerWithTransaction RollbackAll(string serverFilename, Preferences preferences,
bool createOpenObjectServerIfNoRollbackLog)
{
if (string.IsNullOrEmpty(serverFilename))
{
throw new ArgumentNullException("serverFilename");
}
if (!Sop.Utility.Utility.HasRequiredDirectoryAccess(serverFilename))
{
throw new InvalidOperationException(
string.Format("Not enough rights/access on directory containing file '{0}'.",
serverFilename));
}
string serverRootPath = System.IO.Path.GetDirectoryName(serverFilename);
if (string.IsNullOrEmpty(serverRootPath))
{
serverRootPath = System.Environment.CurrentDirectory;
}
string[] appendLogs = null;
if (preferences != null && preferences.MemoryExtenderMode)
{
if (Sop.Utility.Utility.FileExists(serverFilename))
{
Sop.Utility.Utility.FileDelete(serverFilename);
Sop.Utility.Utility.FileDelete(string.Format("{0}.{1}",
serverFilename, ObjectServer.DataInfExtensionLiteral));
}
}
//** NOTE: ProcessUpdateLog needs to be done ahead of RollbackAll as the latter
//** removes backup files which are used by the former
//** rollback all pending transaction updates...
ProcessUpdateLog(serverRootPath, true);
//** Rollback (delete) root trans created DB objects...
if (TransactionRoot.RollbackAll(serverRootPath))
{
/** AppendLogxx.txt
* Grow d:\Sopbin\Sop\File.dta 1050624 2096
*/
appendLogs = Directory.GetFiles(serverRootPath,
string.Format("{0}*.txt", AppendLogLiteral));
}
#region Process append logs
if (appendLogs != null &&
(createOpenObjectServerIfNoRollbackLog || appendLogs.Length > 0))
{
if (Sop.Utility.Utility.FileExists(serverFilename))
{
var r = new ObjectServerWithTransaction(serverFilename, null, preferences);
r.Open();
foreach (string s in appendLogs)
{
ITransactionLogger trans = Transaction.BeginWithNewRoot(r);
//** open the file and do restore for each backed up entry
using (var sr = new StreamReader(s))
{
while (sr.Peek() >= 0)
{
string l = sr.ReadLine();
if (l.StartsWith(GrowToken))
{
int i1 = l.LastIndexOf(' ');
int i2 = l.LastIndexOf(' ', i1 - 1);
string s2 = l.Substring(i2, i1 - i2);
long address;
if (long.TryParse(s2, out address))
{
string fName = l.Substring(GrowToken.Length, i2 - GrowToken.Length);
var f = (OnDisk.File.IFile)r.GetFile(fName);
if (f != null)
{
var dbi = new DeletedBlockInfo();
dbi.StartBlockAddress = address;
int segmentSize;
if (int.TryParse(l.Substring(i1), out segmentSize))
{
dbi.EndBlockAddress = dbi.StartBlockAddress + segmentSize;
if (f.DeletedCollections != null)
{
f.DeletedCollections.Transaction = trans;
f.DeletedCollections.Add(dbi);
}
}
}
}
}
}
}
r.Flush();
trans.Commit();
//** remove the Backup log file, we're done rolling back and it's no longer needed
Sop.Utility.Utility.FileDelete(s);
}
r.Dispose();
//return r;
}
else
{
foreach (string s in appendLogs)
{
Sop.Utility.Utility.FileDelete(s);
}
}
}
#endregion
return(null);
}
