private Generic.SortedList <string, string> ReadValues(string p_SubKeyName)
{
Generic.SortedList <string, string> Retval = new Generic.SortedList <string, string>();
// Read all values in a key - SubKey has to be absolute from the profile store root
XmlReaderSettings ReaderSettings;
string LastElementName = "";
string NextName = "";
string ValueName = "";
bool ReadOK = false;
int RetryCount;
bool ErrorOccurred = false;
string ValuesFileName; // Name of the profile file from which to read
bool ExistsValues, ExistsValuesOriginal, ExistsValuesNew;
swSupport.Reset(); swSupport.Start(); // Start timing this call
if (Strings.Left(p_SubKeyName, 1) != @"\")
{
p_SubKeyName = @"\" + p_SubKeyName; // Condition to have leading \
}
TL.LogMessage(" ReadValues", " SubKeyName: " + p_SubKeyName);
ValuesFileName = VALUES_FILENAME; // Initialise to the file holding current values
RetryCount = -1; // Initialise to ensure we get RETRY_Max number of retrys
// Determine what files exist and handle the case where this key has not yet been created
ExistsValues = FileStore.Exists(p_SubKeyName + @"\" + VALUES_FILENAME);
ExistsValuesOriginal = FileStore.Exists(p_SubKeyName + @"\" + VALUES_FILENAME_ORIGINAL);
ExistsValuesNew = FileStore.Exists(p_SubKeyName + @"\" + VALUES_FILENAME_NEW);
if (!ExistsValues & !ExistsValuesOriginal)
{
throw new ProfileNotFoundException("No profile files exist for this key: " + p_SubKeyName);
}
do
{
RetryCount += 1;
try
{
ReaderSettings = new XmlReaderSettings();
ReaderSettings.IgnoreWhitespace = true;
using (XmlReader Reader = XmlReader.Create(FileStore.FullPath(p_SubKeyName + @"\" + ValuesFileName), ReaderSettings))
{
Reader.Read();
Reader.Read();
// Start reading profile strings
while (Reader.Read())
{
switch (Reader.NodeType)
{
case XmlNodeType.Element:
{
switch (Reader.Name)
{
case object _ when DEFAULT_ELEMENT_NAME:
{
Retval.Add(COLLECTION_DEFAULT_VALUE_NAME, Reader.GetAttribute(VALUE_ATTRIBUTE_NAME));
TL.LogMessage(" ReadValues", " found " + COLLECTION_DEFAULT_VALUE_NAME + " = " + Retval.Item(COLLECTION_DEFAULT_VALUE_NAME));
break;
}
case object _ when VALUE_ELEMENT_NAME:
{
ValueName = Reader.GetAttribute(NAME_ATTRIBUTE_NAME);
Retval.Add(ValueName, Reader.GetAttribute(VALUE_ATTRIBUTE_NAME));
TL.LogMessage(" ReadValues", " found " + ValueName + " = " + Retval.Item(ValueName));
break;
}
default:
{
TL.LogMessage(" ReadValues", " ## Found unexpected Reader.Name: " + Reader.Name.ToString());
break;
}
}
break;
}
default:
{
break;
}
}
}
Reader.Close();
}
swSupport.Stop();
TL.LogMessage(" ReadValues", " added to cache - " + swSupport.ElapsedMilliseconds + " milliseconds");
ReadOK = true;
}
catch (Exception ex)
{
ErrorOccurred = true;
if (RetryCount == RETRY_MAX)
{
if (ValuesFileName == VALUES_FILENAME)
{
ValuesFileName = VALUES_FILENAME_ORIGINAL;
RetryCount = -1;
LogEvent("XMLAccess:ReadValues", "Error reading profile on final retry - attempting recovery from previous version", EventLogEntryType.Warning, EventLogErrors.XMLAccessRecoveryPreviousVersion, ex.ToString());
TL.LogMessageCrLf(" ReadValues", "Final retry exception - attempting recovery from previous version: " + ex.ToString());
}
else
{
LogEvent("XMLAccess:ReadValues", "Error reading profile on final retry", EventLogEntryType.Error, EventLogErrors.XMLAccessReadError, ex.ToString());
TL.LogMessageCrLf(" ReadValues", "Final retry exception: " + ex.ToString());
throw new ProfilePersistenceException("XMLAccess Exception", ex);
}
}
else
{
LogEvent("XMLAccess:ReadValues", "Error reading profile - retry: " + RetryCount, EventLogEntryType.Warning, EventLogErrors.XMLAccessRecoveryPreviousVersion, ex.Message);
TL.LogMessageCrLf(" ReadValues", "Retry " + RetryCount + " exception: " + ex.ToString());
}
}
if (ErrorOccurred)
{
System.Threading.Thread.Sleep(RETRY_INTERVAL);
}
}while (!ReadOK)// Get rid of the XML version string// Read in the Profile name tag// Found default value// Fount an element name// Close the IO readers// Set the exit flag here when a read has been successful // Wait if an error occurred
;
if (ErrorOccurred)
{
LogEvent("XMLAccess:ReadValues", "Recovered from read error OK", EventLogEntryType.SuccessAudit, EventLogErrors.XMLAccessRecoveredOK, null /* TODO Change to default(_) if this is not a reference type */);
TL.LogMessage(" ReadValues", "Recovered from read error OK");
}
return(Retval);
}
