// == Monitor Lock States ==
private void DisplayLockStatus()
{
try
{
ICatalogReadWriteLock RWLock = Globals.catalog.GetReadWriteLock(_monitorCatalogPath);
monitorLabel.Text = "NonBlockingWriteLocked: " + RWLock.IsCurrentlyNonBlockingWriteLocked.ToString()
+ ", WriteLocked: " + RWLock.IsCurrentlyWriteLocked.ToString();
}
catch
{
}
}
private void GetCatalogReadWriteLockBtn_Click(object sender, EventArgs e)
{
int iCat = catListBox.SelectedIndex;
if (iCat >= 0)
{
ICatalogReadWriteLock RWLock = Globals.catalog.GetReadWriteLock(_flatCalaogList[iCat].LocationPath);
MessageBox.Show("Catalog: " + _flatCalaogList[iCat].LocationPath + "\n\n"
+ "ICatalogReadWriteLock.IsCurrentlyNonBlockingWriteLocked = " + RWLock.IsCurrentlyNonBlockingWriteLocked.ToString() + "\n"
+ "ICatalogReadWriteLock.IsCurrentlyWriteLocked = " + RWLock.IsCurrentlyWriteLocked.ToString() + "\n"
+ RWLock.GetType().ToString() + "\n\n"
+ "Note: Call to GetReadWriteLock() returns ICatalogReadWriteLock that can be used to lock\\unlock a catalog for reads & write etc.",
"Catalog.GetReadWriteLock()");
}
}
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();
}
}
