public static GenericDirectoryParser GetInstance()
{
if (dirParser == null)
{
dirParser = new GenericDirectoryParser();
}
return(dirParser);
}
/// <summary>
/// This Method is responsible for Crawling a given Volume or Path recursively.
/// This method periodically checks the shared state variable 'crawlerState' and
/// crawls the given path only when it is set to CrawlerState.Run
///
/// Note: The shared variable is modified by the scheduler periodically depending on the
/// availability of system resources
/// </summary>
/// <param name="path">Path to a root volume or a directory whose contents are to be crawled recursively</param>
private void Crawler(string path)
{
if (GlobalData.RunCrawler) //assume the app is running and user has not exited the application
{
try
{
//Process files
foreach (string file in Directory.GetFiles(path))
{
GlobalData.lIndexingStatus.Text = "Indexing: " + file;
if (crawlerState == CrawlerState.Run) //Is the system in idle state
{
//Get the respective content handler. If no content handler is present return the default handler
IEDSParser parser = GlobalData.Parsers.ContainsKey(Path.GetExtension(file).ToLower()) ?
GlobalData.Parsers[Path.GetExtension(file).ToLower()] : GlobalData.Parsers["*.*"];
if (parser != null) //For some nasty reason the file got deleted or doesnot exist
{
StringDictionary properties = parser.GetProperties(file);
if (properties != null)
{
#if Log
Console.WriteLine("Indexing File:" + file);
#endif
GlobalData.Indexer.Index(properties);
}
}
}
else if (crawlerState == CrawlerState.Stop) //If the system is not ready
{
while (crawlerState == CrawlerState.Stop && GlobalData.RunScheduler && GlobalData.RunCrawler) //Check the status for every 1 sec
{
Thread.Sleep(1000);
}
}
else if (!GlobalData.RunCrawler)
{
break; //if app is already close then we should also stop the crawler
}
}
//Process Directories
foreach (string dir in Directory.GetDirectories(path))
{
if (Path.GetFileName(dir).ToLower() != "recycler" ||
!string.IsNullOrEmpty(Path.GetDirectoryName(Path.GetDirectoryName(dir))))
{
GenericDirectoryParser parser = GenericDirectoryParser.GetInstance();
if (parser != null)
{
StringDictionary properties = parser.GetProperties(dir);
if (properties != null)
{
#if Log
Console.WriteLine("Indexing Directory:" + dir);
#endif
GlobalData.Indexer.Index(properties);
}
}
Crawler(dir);
}
}
}
catch (UnauthorizedAccessException uae) { }
}
}
public static GenericDirectoryParser GetInstance()
{
if (dirParser == null) dirParser = new GenericDirectoryParser();
return dirParser;
}
