/// <summary>
/// The worker method.
/// </summary>
/// <param name="task"></param>
protected override Exception DoTaskWork(ThreadWorkerTaskBase task)
{
//if ((Task)task.TaskID == Task.AnonymousDelegate)
//{
// Action action = (Action)task.Arguments[0];
// if (action == null)
// throw new InvalidOperationException("no Action delegate specified");
// action();
// // default event if no result(s) from processing:
// RaiseBackgroundTaskFinished(task, 1, 1, null, null);
// return null;
//}
RssBanditApplication app = ((ThreadWorkerTask)task).Application;
int maxTasks = 0, currentTask = 0;
bool force;
UltraTreeNode feedNode;
string stylesheet, html;
switch ((Task)task.TaskID)
{
case Task.LoadAllFeedSourcesSubscriptions:
List <FeedSourceEntry> entries = (List <FeedSourceEntry>)task.Arguments[0];
var finished = new ManualResetEvent(false);
int max = entries.Count;
int current = 0;
for (int i = 0; i < max; i++)
{
IndexedFeedSourceEntry e = new IndexedFeedSourceEntry(entries[i], i);
PriorityThreadPool.QueueUserWorkItem(
delegate(object state)
{
IndexedFeedSourceEntry fs = (IndexedFeedSourceEntry)state;
int threadCurrent = fs.Index + 1;
try
{
app.LoadFeedSourceSubscriptions(fs.Entry, true);
this.RaiseBackroundTaskProgress(task, max, threadCurrent, null, fs.Entry);
}
catch (Exception loadEx)
{
this.RaiseBackroundTaskProgress(task, max, threadCurrent, loadEx, fs.Entry);
}
finally
{
if (Interlocked.Increment(ref current) >= max)
{
if (finished != null)
{
finished.Set();
}
}
}
}, e, 1);
}
if (max > 0)
{
finished.WaitOne(Timeout.Infinite, true);
}
break;
case Task.LoadFeedSourceSubscriptions:
app.LoadFeedSourceSubscriptions((FeedSourceEntry)task.Arguments[0], true);
break;
// code mocved to FlaggedItemsFeed migrate method:
//case Task.LoadSpecialFeeds:
// app.InitializeFlaggedItems();
// break;
case Task.RefreshFeeds:
force = (bool)task.Arguments[0];
app.FeedSources.ForEach(s => s.RefreshFeeds(force));
break;
case Task.RefreshCommentFeeds:
force = (bool)task.Arguments[0];
app.CommentFeedsHandler.RefreshFeeds(force);
break;
case Task.RefreshCategoryFeeds:
FeedSourceEntry entry = (FeedSourceEntry)task.Arguments[0];
string category = (string)task.Arguments[1];
force = (bool)task.Arguments[2];
entry.Source.RefreshFeeds(category, force);
break;
case Task.LoadCommentFeed:
INewsItem item = (INewsItem)task.Arguments[0];
if (item == null)
{
throw new InvalidOperationException("Non-Null task argument 'item' expected.");
}
object result = null;
if ((item.Feed != null) && (item.Feed.owner is IFacebookFeedSource))
{
IFacebookFeedSource fbSource = item.Feed.owner as IFacebookFeedSource;
result = fbSource.GetCommentsForItem(item);
}
else
{
NewsFeed cmtFeed = new NewsFeed();
cmtFeed.link = item.CommentRssUrl;
cmtFeed.title = item.Feed.title;
if (!string.IsNullOrEmpty(item.Feed.authUser))
{ // take over credential settings
string u = null, p = null;
FeedSource.GetFeedCredentials(item.Feed, ref u, ref p);
FeedSource.SetFeedCredentials(cmtFeed, u, p);
}
result = RssParser.DownloadItemsFromFeed(cmtFeed, app.Proxy, FeedSource.Offline);
}
RaiseBackgroundTaskFinished(task, maxTasks, currentTask, null, new object[] { result, item, task.Arguments[1], task.Arguments[2] });
return(null);
case Task.TransformFeed:
IFeedDetails feed = (IFeedDetails)task.Arguments[0];
feedNode = (UltraTreeNode)task.Arguments[1];
stylesheet = (string)task.Arguments[2];
html = app.FormatFeed(stylesheet, feed);
RaiseBackgroundTaskFinished(task, maxTasks, currentTask, null,
new object[] { feedNode, html });
return(null);
case Task.TransformCategory:
FeedInfoList feeds = (FeedInfoList)task.Arguments[0];
feedNode = (UltraTreeNode)task.Arguments[1];
stylesheet = (string)task.Arguments[2];
html = app.FormatFeeds(stylesheet, feeds);
RaiseBackgroundTaskFinished(task, maxTasks, currentTask, null,
new object[] { feedNode, html });
return(null);
default:
throw new InvalidOperationException("Unhandled ThreadWorker Task: " + task.TaskID);
}
// default event if no result(s) from processing:
RaiseBackgroundTaskFinished(task, maxTasks, currentTask, null, null);
return(null);
}
