internal int IndexNewsItems(IList <INewsItem> newsItems)
{
if (newsItems != null)
{
for (int i = 0; i < newsItems.Count; i++)
{
INewsItem item = newsItems[i];
if (item != null)
{
try {
// we do not always have the content loaded:
if (item.ContentType == ContentType.None && item.Feed != null && item.Feed.owner != null)
{
if (item.Feed.owner != null)
{
FeedSource handler = (FeedSource)item.Feed.owner;
handler.GetCachedContentForItem(item);
}
}
indexModifier.Add(LuceneNewsItemSearch.Document(item), item.Language);
} catch (Exception ex) {
Log.Error("IndexNewsItems() error", ex);
}
}
}
return(newsItems.Count);
}
return(0);
}
/// <summary>
/// Removes the index documents of the news items.
/// </summary>
/// <param name="newsItems">The news items.</param>
/// <returns>Number of index documents removed</returns>
internal void RemoveNewsItems(IList newsItems)
{
if (newsItems != null && newsItems.Count > 0)
{
//int removed = 0;
for (int i = 0; i < newsItems.Count; i++)
{
INewsItem item = newsItems[i] as INewsItem;
if (item != null)
{
Term term = new Term(LuceneSearch.IndexDocument.ItemID,
LuceneNewsItemSearch.UID(item));
indexModifier.Delete(term);
}
}
//return removed;
}
//return 0;
}
/// <summary>
/// Executes a search.
/// </summary>
/// <param name="criteria">The criteria.</param>
/// <param name="scope">The scope.</param>
/// <param name="feedSources">The news handlers.</param>
/// <param name="cultureName">Name of the culture.</param>
/// <returns></returns>
public Result ExecuteSearch(SearchCriteriaCollection criteria, INewsFeed[] scope, IEnumerable <FeedSource> feedSources, string cultureName)
{
if (!UseIndex)
{
return(null);
}
Query q = BuildLuceneQuery(criteria, scope, GetAnalyzer(cultureName));
if (q == null) // not validated
{
return(new Result(0, 0, GetList <SearchHitNewsItem> .Empty, GetArrayList.Empty));
}
//TODO: to be fixed -
// next line causes issues with concurrent thread access to the search index:
IndexSearcher searcher = new IndexSearcher(this._settings.GetIndexDirectory());
Hits hits = null;
while (hits == null)
{
try {
DateTime start = DateTime.Now;
hits = searcher.Search(q, Sort.RELEVANCE);
TimeSpan timeRequired = TimeSpan.FromTicks(DateTime.Now.Ticks - start.Ticks);
_log.Info(String.Format("Found {0} document(s) that matched query '{1}' (time required: {2})", hits.Length(), q, timeRequired));
} catch (BooleanQuery.TooManyClauses) {
BooleanQuery.SetMaxClauseCount(BooleanQuery.GetMaxClauseCount() * 2);
_log.Info(String.Format("Search failed with error 'BooleanQuery.TooManyClauses'. Retry with BooleanQuery.MaxClauseCount == {0}", BooleanQuery.GetMaxClauseCount()));
}
}
List <SearchHitNewsItem> items = new List <SearchHitNewsItem>(hits.Length());
HybridDictionary matchedFeeds = new HybridDictionary();
for (int i = 0; i < hits.Length(); i++)
{
Document doc = hits.Doc(i);
INewsFeed f = null;
string feedLink = doc.Get(Keyword.FeedLink);
if (matchedFeeds.Contains(feedLink))
{
f = (INewsFeed)matchedFeeds[feedLink];
}
if (f == null)
{
foreach (FeedSource h in feedSources)
{
if (h.IsSubscribed(feedLink))
{
f = h.GetFeeds()[feedLink];
break;
}
}
}
if (f == null)
{
continue;
}
SearchHitNewsItem item = new SearchHitNewsItem(f,
doc.Get(Keyword.ItemTitle),
doc.Get(Keyword.ItemLink),
doc.Get(IndexDocument.ItemSummary),
doc.Get(Keyword.ItemAuthor),
new DateTime(DateTools.StringToTime(doc.Get(Keyword.ItemDate))),
LuceneNewsItemSearch.NewsItemIDFromUID(doc.Get(IndexDocument.ItemID)));
items.Add(item);
if (!matchedFeeds.Contains(feedLink))
{
matchedFeeds.Add(feedLink, f);
}
}
return(new Result(items.Count, matchedFeeds.Count, items, new ArrayList(matchedFeeds.Values)));
}
