private void trySetPropertiesFromConfigFile()
{
string configFilePath = GetConfigFileFullPath();
if (File.Exists(configFilePath))
{
try {
LogFileFactoryConfig newLogFileFactoryConfig
= LogFileFactoryConfig.LoadFromFile(configFilePath);
bool resetIsInitializing = false;
try {
lock (SyncLock) {
resetIsInitializing = !isInitializing;
isInitializing = true;
}
newLogFileFactoryConfig.SetPropertiesOn(this);
} finally {
lock (SyncLock) {
logFileFactoryConfig = newLogFileFactoryConfig;
if (resetIsInitializing)
{
isInitializing = false;
}
}
}
TraceSources.For(TraceFileFactoryAssembly)
.Info(
"Found {0} file found at '{1}' - '{2}'.",
nameof(LogFileFactoryConfig),
configFilePath,
logFileFactoryConfig);
} catch (Exception exception) {
TraceSources.For(TraceFileFactoryAssembly)
.Error(
exception,
"Invalid {0} file found at '{1}' - '{2}'.",
nameof(LogFileFactoryConfig),
configFilePath,
exception.Message);
}
}
else
{
try {
Directory.CreateDirectory(GetLogFolderPath());
LogFileFactoryConfig.CreateFrom(this, out XmlDocument xmlDocument);
File.WriteAllText(configFilePath, xmlDocument.InnerXml);
} catch (Exception exception) {
TraceSources.For(TraceFileFactoryAssembly)
.Error(
exception,
"Error writing {0} file to '{1}' - '{2}'.",
nameof(LogFileFactoryConfig),
configFilePath,
exception.Message);
}
}
}
/// <summary>
/// Tries to load an Xml file at the <paramref name="filePath"/> and parse
/// and set property values on a new <see cref="LogFileFactoryConfig"/>
/// instance. The file can be formed with elements like this:
/// <code>
/// <LogFileFactoryConfig>
/// <DefaultTraceSourceSelection>All</DefaultTraceSourceSelection>
/// <-- ... -->
/// </LogFileFactoryConfig>
/// </code>
/// And this method will also first try to parse any attributes defined on the root element
/// with the property names --- which will take precedence over child elements.
/// </summary>
/// <param name="filePath">Required.</param>
/// <returns>Not null.</returns>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="FileNotFoundException"></exception>
/// <exception cref="XmlException"></exception>
public static LogFileFactoryConfig LoadFromFile(string filePath)
{
if (string.IsNullOrEmpty(filePath))
{
throw new ArgumentNullException(nameof(filePath));
}
XmlDocument xmlDocument = new XmlDocument();
try {
xmlDocument.Load(filePath);
} catch (FileNotFoundException) {
throw;
} catch (XmlException) {
throw;
} catch (Exception exception) {
throw new XmlException(
$"Unable to parse Xml document at '{filePath}'. --- '{exception.Message}'.",
exception);
}
if (xmlDocument.DocumentElement == null)
{
throw new XmlException($"Unable to parse Xml document at '{filePath}'.");
}
LogFileFactoryConfig logFileFactoryConfig = new LogFileFactoryConfig();
foreach (PropertyDescriptor property in LogFileFactoryConfig.GetConfigProperties())
{
if (!xmlDocument.DocumentElement.HasChildNodes)
{
if (property.CanResetValue(logFileFactoryConfig))
{
property.ResetValue(logFileFactoryConfig);
}
continue;
}
bool reset = true;
foreach (XmlNode node in xmlDocument.DocumentElement.GetElementsByTagName(property.Name))
{
if (!TryParseAndSetProperty(logFileFactoryConfig, property, node.InnerText))
{
continue;
}
reset = false;
break;
}
if (reset &&
property.CanResetValue(logFileFactoryConfig))
{
property.ResetValue(logFileFactoryConfig);
}
}
return(logFileFactoryConfig);
static bool TryParseAndSetProperty(
LogFileFactoryConfig config,
PropertyDescriptor property,
string xmlValue)
{
if ((property.PropertyType == typeof(LogFileFactorySelection)) ||
(property.PropertyType == typeof(LogFileFactorySelection?)))
{
if (!string.IsNullOrEmpty(xmlValue) &&
Enum.TryParse(xmlValue, out LogFileFactorySelection value))
{
property.SetValue(config, value);
return(true);
}
}
else if ((property.PropertyType == typeof(SourceLevels)) ||
(property.PropertyType == typeof(SourceLevels?)))
{
if (!string.IsNullOrEmpty(xmlValue) &&
Enum.TryParse(xmlValue, out SourceLevels value))
{
property.SetValue(config, value);
return(true);
}
}
else if ((property.PropertyType == typeof(bool)) ||
(property.PropertyType == typeof(bool?)))
{
if (!string.IsNullOrEmpty(xmlValue) &&
bool.TryParse(xmlValue, out bool value))
{
property.SetValue(config, value);
return(true);
}
}
if (property.CanResetValue(config))
{
property.ResetValue(config);
}
return(false);
}