/// <summary>
/// <para>Returns the <see cref="DateTime"/> of the last change of the information watched</para>
/// <para>The information is retrieved using the watched file modification timestamp</para>
/// </summary>
/// <returns>The <see cref="DateTime"/> of the last modificaiton, or <code>DateTime.MinValue</code> if the information can't be retrieved</returns>
protected override DateTime GetCurrentLastWriteTime()
{
lock (_padLock)
{
DateTime lastWriteTime;
DateTime createdTime;
ChoConfigurationChangeAction configurationChangeAction = ChoConfigurationChangeAction.Changed;
if (File.Exists(_configFilePath))
{
lastWriteTime = File.GetLastWriteTime(_configFilePath);
createdTime = File.GetCreationTime(_configFilePath);
}
else
{
lastWriteTime = DateTime.MinValue;
createdTime = DateTime.MinValue;
}
try
{
if (lastWriteTime == DateTime.MinValue)
{
if (_lastWriteTime == DateTime.MinValue)
{
}
else
{
configurationChangeAction = ChoConfigurationChangeAction.Deleted;
}
}
else
{
if (_lastWriteTime == DateTime.MinValue)
{
configurationChangeAction = ChoConfigurationChangeAction.Created;
}
else
{
if (_lastWriteTime != lastWriteTime)
{
configurationChangeAction = ChoConfigurationChangeAction.Changed;
}
}
}
}
finally
{
if (_configurationChangeAction != configurationChangeAction)
{
_configurationChangeAction = configurationChangeAction;
_configurationFileChangedEventArgs = new ChoConfigurationFileChangedEventArgs(this.SectionName, ChoPath.GetFullPath(_configFilePath), _configurationChangeAction, _lastWriteTime);
}
_lastWriteTime = lastWriteTime;
_createdTime = createdTime;
}
return(_lastWriteTime);
}
}
/// <summary>
/// <para>Initialize a new <see cref="ChoConfigurationChangeFileWatcher"/> class with the path to the configuration file and the name of the section</para>
/// </summary>
/// <param name="_configFilePath">
/// <para>The full path to the configuration file.</para>
/// </param>
/// <param name="_configurationSectionName">
/// <para>The name of the configuration section to watch.</para>
/// </param>
public ChoConfigurationChangeFileWatcher(string configurationSectionName, string configFilePath)
: base(configurationSectionName)
{
if (string.IsNullOrEmpty(configFilePath))
{
throw new ArgumentException(Resources.ExceptionStringNullOrEmpty, "configFilePath");
}
this._configFilePath = configFilePath;
_configurationFileChangedEventArgs = new ChoConfigurationFileChangedEventArgs(configurationSectionName, ChoPath.GetFullPath(_configFilePath), _configurationChangeAction, DateTime.MinValue);
}
