private void LoadButton_Click(object sender, EventArgs e)
{
treeView1.Nodes.Clear();
nodeCatalogTypeXml = null;
EnableDisable();
String path = GetCatalogContentStoreLocation();
if (path == "")
{
MessageBox.Show("Catalog path is invalid or does not contain a \"ContentStore\" folder.");
return;
}
// First check for locks (ie. Catalog is in flux being rebuilt)
ICatalogReadWriteLock RWLock = Globals.catalog.GetReadWriteLock(path);
if (RWLock.IsCurrentlyNonBlockingWriteLocked || RWLock.IsCurrentlyWriteLocked)
{
MessageBox.Show("Catalog is busy. Try again soon.\nCatalog is currently write locked.");
return;
}
// Load Catalog XML -- Locking as we go so others don't try a modify it while we read
RWLock.StartNonBlockingWriteOperation(10000); //10 second time out (usually reads all XML under 1 second on my laptop VM)
Cursor.Current = Cursors.WaitCursor;
try
{
_catalogXml = new CatalogParser(path);
_catalogPackageMetaData = _catalogXml.GetPackageMetaData();
BuildToc();
EnableDisable();
if (_catalogXml.InstalledBooks == null)
{
MessageBox.Show("No data found! Note that only VS 11 catalog folders contain HV2 XML data.");
}
}
finally
{
Cursor.Current = Cursors.Default;
RWLock.ExitNonBlockingWriteOperation();
}
}
public void Convert(CatalogParser parser, XmlReader reader, Date created,
Stream bookStream, Stream volumeStream)
{
// There are almost 42,000 books and 520,000 files in the project Gutenberg. We set
// up 59 * 10,000 steps here to have the progress bar stretching quite good and still
// having a little space to grow for the project content.
var progress = Log.Action(59, "Converting catalog...");
int bookCount = 0, skippedCount = 0, volumeCount = 0, totalCount = 0;
var bookParser = new BookParser { Log = Log };
var volumeParser = new VolumeParser { Log = Log };
using (var bookWriter = bookParser.Create(bookStream, created))
using (var volumeWriter = volumeParser.Create(volumeStream, created)) {
foreach (var item in parser.GetItems(reader)) {
var book = item as Book;
if (book != null) {
// Book 9140 and a couple of others are invalid.
if (string.IsNullOrEmpty(book.Title)) {
Log.Verbose("Skipping book {0} with no title.", book.Number);
++skippedCount;
} else {
bookParser.Write(bookWriter, book);
}
++bookCount;
} else {
volumeParser.Write(volumeWriter, (Volume) item);
++volumeCount;
}
// One step after every 10,000 items run nicely on my laptop; less loaded the
// CPU with constant reporting and more made the console wait for too long.
if (++totalCount % 10000 == 0)
progress.Continue("{0} items processed...", totalCount);
}
bookParser.Finalize(bookWriter);
volumeParser.Finalize(volumeWriter);
}
Log.Verbose("{0} books and {1} volumes were processed, {2} books skipped.",
bookCount, volumeCount, skippedCount);
progress.Finish();
}
public CatalogPageViewModel(INavigationService navigationService)
{
_navigationService = navigationService;
Tiles = new ObservableCollection <ICatalogTile>();
_parser = new CatalogParser <CatalogTile>();
}
public LibraryLoader()
{
parser = new CatalogParser();
writer = new CatalogEntityWriter();
}
public bool TryUpdate(Stream catalogStream, BookSource books, VolumeSource volumes,
Func<Date, bool> update, Func<bool> confirm)
{
var progress = Log.Action(5, "Trying catalog update...");
progress.Continue("Opening remote catalog...");
var parser = new CatalogParser { Log = Log };
using (var reader = parser.Open(catalogStream)) {
progress.Continue("Checking remote creation date...");
var date = parser.GetCreated(reader);
Log.Verbose("Remote creation date: {0}.", date);
if (update(date)) {
progress.Continue("Updating local catalog...");
string bookPath = null, volumePath = null;
try {
using (var bookStream = books.Create(out bookPath))
using (var volumeStream = volumes.Create(out volumePath))
Convert(parser, reader, date, bookStream, volumeStream);
progress.Continue("Copying converted catalog...");
if (confirm()) {
books.Update(bookPath);
volumes.Update(volumePath);
Log.Verbose("Local catalog updated.");
progress.Finish();
return true;
}
} finally {
if (bookPath != null)
IOUtility.DeleteTempFile(bookPath);
if (volumePath != null)
IOUtility.DeleteTempFile(volumePath);
}
Log.Warning("Local catalog left intact.");
progress.Finish();
return false;
}
Log.Warning("Local catalog up-to-date.");
progress.Finish();
return false;
}
}
