/// <summary>
/// This constructor is used while retrieving the hit from the dump
/// </summary>
/// <param name="ixr">The dump indexer this Wiki topic belongs to</param>
/// <param name="hit">The Lucene Hit object</param>
public PageInfo(Indexer ixr, Hit hit)
{
indexer = ixr;
Document doc = hit.GetDocument();
TopicId = Convert.ToInt64(doc.GetField("topicid").StringValue());
Name = doc.GetField("title").StringValue();
Beginnings = new long[doc.GetFields("beginning").Length];
Ends = new long[doc.GetFields("end").Length];
int i = 0;
foreach (byte[] binVal in doc.GetBinaryValues("beginning"))
{
Beginnings[i] = BitConverter.ToInt64(binVal, 0);
i++;
}
i = 0;
foreach (byte[] binVal in doc.GetBinaryValues("end"))
{
Ends[i] = BitConverter.ToInt64(binVal, 0);
i++;
}
Array.Sort(Beginnings);
Array.Sort(Ends);
}
public List <IndexPageResult> GetDocumentPagesWithQuery(string query)
{
List <IndexPageResult> results = new List <IndexPageResult>();
Dictionary <string, IndexPageResult> fingerprints_already_seen = new Dictionary <string, IndexPageResult>();
try
{
using (IndexReader index_reader = IndexReader.Open(LIBRARY_INDEX_BASE_PATH, true))
{
using (IndexSearcher index_searcher = new IndexSearcher(index_reader))
{
QueryParser query_parser = new QueryParser(Version.LUCENE_29, "content", analyzer);
Lucene.Net.Search.Query query_object = query_parser.Parse(query);
Lucene.Net.Search.Hits hits = index_searcher.Search(query_object);
var i = hits.Iterator();
while (i.MoveNext())
{
Lucene.Net.Search.Hit hit = (Lucene.Net.Search.Hit)i.Current;
string fingerprint = hit.Get("fingerprint");
int page = Convert.ToInt32(hit.Get("page"));
double score = hit.GetScore();
// If this is the first time we have seen this fingerprint, make the top-level record
if (!fingerprints_already_seen.ContainsKey(fingerprint))
{
IndexPageResult result = new IndexPageResult();
result.fingerprint = fingerprint;
result.score = score;
// Add to our structures
results.Add(result);
fingerprints_already_seen[fingerprint] = result;
}
// And add the page record
{
IndexPageResult result = fingerprints_already_seen[fingerprint];
result.page_results.Add(new PageResult {
page = page, score = score
});
}
}
// Close the index
index_searcher.Close();
}
index_reader.Close();
}
}
catch (Exception ex)
{
Logging.Warn(ex, $"GetDocumentPagesWithQuery: There was a problem opening the index file for searching (path: '{LIBRARY_INDEX_BASE_PATH}', query: '{query}')");
}
return(results);
}
public HashSet <string> GetDocumentsWithWord(string keyword)
{
HashSet <string> fingerprints = new HashSet <string>();
try
{
keyword = ReasonableWord.MakeReasonableWord(keyword);
if (null != keyword)
{
////Do a quick check for whether there are actually any segments files, otherwise we throw many exceptions in the IndexReader.Open in a very tight loop.
////Added by Nik to cope with some exception...will uncomment this when i know what the problem is...
//var segments_files = Directory.GetFiles(LIBRARY_INDEX_BASE_PATH, "segments*", SearchOption.AllDirectories);
//if (segments_files.Length <= 0)
//{
// Logging.Debug("No index segments files found");
// return fingerprints;
//}
using (IndexReader index_reader = IndexReader.Open(LIBRARY_INDEX_BASE_PATH, true))
{
using (IndexSearcher index_searcher = new IndexSearcher(index_reader))
{
Lucene.Net.Search.TermQuery term_query = new Lucene.Net.Search.TermQuery(new Term("content", keyword));
Lucene.Net.Search.Hits hits = index_searcher.Search(term_query);
var i = hits.Iterator();
while (i.MoveNext())
{
Lucene.Net.Search.Hit hit = (Lucene.Net.Search.Hit)i.Current;
string fingerprint = hit.Get("fingerprint");
fingerprints.Add(fingerprint);
}
// Close the index
index_searcher.Close();
}
index_reader.Close();
}
}
}
catch (Exception ex)
{
Logging.Warn(ex, $"GetDocumentsWithWord: There was a problem opening the index file for searching (path: '{LIBRARY_INDEX_BASE_PATH}', keyword: '{keyword}')");
}
return(fingerprints);
}
/***
* Understands the lucene query syntax
*/
public List <Utilities.Language.TextIndexing.IndexResult> GetDocumentsWithQuery(string query)
{
List <Utilities.Language.TextIndexing.IndexResult> fingerprints = new List <Utilities.Language.TextIndexing.IndexResult>();
HashSet <string> fingerprints_already_seen = new HashSet <string>();
try
{
using (Lucene.Net.Index.IndexReader index_reader = Lucene.Net.Index.IndexReader.Open(LIBRARY_INDEX_BASE_PATH, true))
{
using (Lucene.Net.Search.IndexSearcher index_searcher = new Lucene.Net.Search.IndexSearcher(index_reader))
{
Lucene.Net.QueryParsers.QueryParser query_parser = new Lucene.Net.QueryParsers.QueryParser(Version.LUCENE_29, "content", analyzer);
Lucene.Net.Search.Query query_object = query_parser.Parse(query);
Lucene.Net.Search.Hits hits = index_searcher.Search(query_object);
var i = hits.Iterator();
while (i.MoveNext())
{
Lucene.Net.Search.Hit hit = (Lucene.Net.Search.Hit)i.Current;
string fingerprint = hit.Get("fingerprint");
string page = hit.Get("page");
if (!fingerprints_already_seen.Contains(fingerprint))
{
fingerprints_already_seen.Add(fingerprint);
IndexResult index_result = new IndexResult {
fingerprint = fingerprint, score = hit.GetScore()
};
fingerprints.Add(index_result);
}
}
// Close the index
index_searcher.Close();
}
index_reader.Close();
}
}
catch (Exception ex)
{
Logging.Warn(ex, "GetDocumentsWithQuery: There was a problem opening the index file for searching.");
}
return(fingerprints);
}
static protected Hit DocumentToHit (Document doc)
{
Hit hit;
hit = new Hit ();
hit.Uri = GetUriFromDocument (doc);
string str;
str = doc.Get ("ParentUri");
if (str != null)
hit.ParentUri = UriFu.EscapedStringToUri (str);
hit.Timestamp = StringFu.StringToDateTime (doc.Get ("Timestamp"));
AddPropertiesToHit (hit, doc, true);
return hit;
}
public bool HitFilter (Hit hit)
{
// First, check the Timestamp
if (Key == QueryPart_DateRange.AllPropertiesKey
|| Key == QueryPart_DateRange.TimestampKey) {
DateTime dt;
dt = hit.Timestamp;
if (StartDate <= dt && dt <= EndDate)
return true;
if (Key == QueryPart_DateRange.TimestampKey)
return false;
}
if (Key == QueryPart_DateRange.AllPropertiesKey) {
// Walk through all of the properties, and see if any
// date properties fall inside the range.
foreach (Property prop in hit.Properties) {
if (prop.Type == PropertyType.Date) {
DateTime dt;
dt = StringFu.StringToDateTime (prop.Value);
if (StartDate <= dt && dt <= EndDate)
return true;
}
}
return false;
} else {
// Walk through all of the properties with the given key,
// and see if any of them fall inside of the range.
string[] values;
values = hit.GetProperties (Key);
foreach (string v in values) {
DateTime dt;
dt = StringFu.StringToDateTime (v);
if (StartDate <= dt && dt <= EndDate)
return true;
}
return false;
}
}
public bool HitFilter (Hit hit)
{
return ! original (hit);
}
public bool HitFilter (Hit hit)
{
foreach (HitFilter hit_filter in all)
if (! hit_filter (hit))
return false;
return true;
}
public bool HitFilter (Hit hit)
{
if (contains_known_true)
return true;
foreach (HitFilter hit_filter in all)
if (hit_filter (hit))
return true;
return false;
}
//////////////////////////////////////////////////////////////////////////////
//
// Special Hit Filtering classes
//
static private bool TrueHitFilter (Hit hit)
{
return true;
}
static protected void AddPropertiesToHit (Hit hit, Document doc, bool from_primary_index)
{
Property prop;
foreach (Field f in doc.Fields ()) {
prop = GetPropertyFromDocument (f, doc, from_primary_index);
if (prop != null)
hit.AddProperty (prop);
}
}
///////////////////////////////////////////////////////////////////////////////////
//
// Various ways to grab lots of hits at once.
// These should never be used for querying, only for utility
// functions.
//
public int GetBlockOfHits (int cookie,
Hit [] block_of_hits)
{
IndexReader primary_reader;
IndexReader secondary_reader;
primary_reader = GetReader (PrimaryStore);
secondary_reader = GetReader (SecondaryStore);
int request_size;
request_size = block_of_hits.Length;
if (request_size > primary_reader.NumDocs ())
request_size = primary_reader.NumDocs ();
int max_doc;
max_doc = primary_reader.MaxDoc ();
if (cookie < 0) {
Random random;
random = new Random ();
cookie = random.Next (max_doc);
}
int original_cookie;
original_cookie = cookie;
Hashtable primary_docs, secondary_docs;
primary_docs = UriFu.NewHashtable ();
secondary_docs = UriFu.NewHashtable ();
// Load the primary documents
for (int i = 0; i < request_size; ++i) {
if (! primary_reader.IsDeleted (cookie)) {
Document doc;
doc = primary_reader.Document (cookie);
primary_docs [GetUriFromDocument (doc)] = doc;
}
++cookie;
if (cookie >= max_doc) // wrap around
cookie = 0;
// If we somehow end up back where we started,
// give up.
if (cookie == original_cookie)
break;
}
// If necessary, load the secondary documents
if (secondary_reader != null) {
LNS.IndexSearcher searcher;
searcher = new LNS.IndexSearcher (secondary_reader);
LNS.Query uri_query;
uri_query = UriQuery ("Uri", primary_docs.Keys);
LNS.Hits hits;
hits = searcher.Search (uri_query);
for (int i = 0; i < hits.Length (); ++i) {
Document doc;
doc = hits.Doc (i);
secondary_docs [GetUriFromDocument (doc)] = doc;
}
searcher.Close ();
}
ReleaseReader (primary_reader);
ReleaseReader (secondary_reader);
// Now assemble the hits
int j = 0;
foreach (Uri uri in primary_docs.Keys) {
Document primary_doc, secondary_doc;
primary_doc = primary_docs [uri] as Document;
secondary_doc = secondary_docs [uri] as Document;
Hit hit;
hit = DocumentToHit (primary_doc);
if (secondary_doc != null)
AddPropertiesToHit (hit, secondary_doc, false);
block_of_hits [j] = hit;
++j;
}
// null-pad the array, if necessary
for (; j < block_of_hits.Length; ++j)
block_of_hits [j] = null;
// Return the new cookie
return cookie;
}
/// <summary>
/// This constructor is used while retrieving the hit from the dump
/// </summary>
/// <param name="ltask">The dump indexer this Wiki topic belongs to</param>
/// <param name="hit">The Lucene Hit object</param>
public PageInfo(Indexer ixr, Hit hit)
{
TreatRedirectException = false;
Indexer = ixr;
// Decoder setter sort Beginnings and Ends.
_decoder = ixr;
Score = hit.GetScore();
Document doc = hit.GetDocument();
TopicId = Convert.ToInt64(doc.GetField("topicid").StringValue());
Name = doc.GetField("title").StringValue();
Beginnings = new long[doc.GetFields("beginning").Length];
Ends = new long[doc.GetFields("end").Length];
int i = 0;
foreach (byte[] binVal in doc.GetBinaryValues("beginning"))
{
Beginnings[i] = BitConverter.ToInt64(binVal, 0);
i++;
}
i = 0;
foreach (byte[] binVal in doc.GetBinaryValues("end"))
{
Ends[i] = BitConverter.ToInt64(binVal, 0);
i++;
}
Array.Sort(Beginnings);
Array.Sort(Ends);
}
private ICollection DoLowLevelRDFQuery (Query query,
PropertyType pred_type,
string predicate,
string field_value,
TextCache text_cache)
{
Stopwatch total, a, b, c, d, e, f;
total = new Stopwatch ();
a = new Stopwatch ();
b = new Stopwatch ();
c = new Stopwatch ();
d = new Stopwatch ();
e = new Stopwatch ();
f = new Stopwatch ();
total.Start ();
a.Start ();
// Assemble all of the parts into a bunch of Lucene queries
ArrayList primary_required_part_queries;
ArrayList secondary_required_part_queries;
LNS.BooleanQuery primary_prohibited_part_query;
LNS.BooleanQuery secondary_prohibited_part_query;
AndHitFilter all_hit_filters;
ArrayList term_list;
// Assemble all of the parts into a bunch of Lucene queries
term_list = AssembleQuery (query,
null,
null,
out primary_required_part_queries,
out secondary_required_part_queries,
out primary_prohibited_part_query,
out secondary_prohibited_part_query,
out all_hit_filters);
a.Stop ();
if (Debug)
Log.Debug ("###### {0}: Building queries took {1}", IndexName, a);
// If we have no required parts, give up.
if (primary_required_part_queries == null)
return null;
b.Start ();
//
// Now that we have all of these nice queries, let's execute them!
//
// Create the searchers that we will need.
IndexReader primary_reader;
LNS.IndexSearcher primary_searcher;
IndexReader secondary_reader;
LNS.IndexSearcher secondary_searcher;
// Create the searchers that we will need.
if (! BuildSearchers (out primary_reader, out primary_searcher, out secondary_reader, out secondary_searcher))
return null;
b.Stop ();
if (Debug)
Log.Debug ("###### {0}: Readers/searchers built in {1}", IndexName, b);
// Build whitelists and blacklists for search subsets.
c.Start ();
// Possibly create our whitelists from the search subset.
LuceneBitArray primary_whitelist, secondary_whitelist;
CreateQueryWhitelists (null,
primary_searcher,
secondary_searcher,
primary_prohibited_part_query,
secondary_prohibited_part_query,
out primary_whitelist,
out secondary_whitelist);
c.Stop ();
if (Debug)
Log.Debug ("###### {0}: Whitelists and blacklists built in {1}", IndexName, c);
// Now run the low level queries against our indexes.
d.Start ();
BetterBitArray primary_matches = null;
if (primary_required_part_queries != null) {
if (secondary_searcher != null)
primary_matches = DoRequiredQueries_TwoIndex (primary_searcher,
secondary_searcher,
primary_required_part_queries,
secondary_required_part_queries,
primary_whitelist,
secondary_whitelist);
else
primary_matches = DoRequiredQueries (primary_searcher,
primary_required_part_queries,
primary_whitelist);
}
d.Stop ();
if (Debug)
Logger.Log.Debug ("###### {0}: Low-level queries finished in {1} and returned {2} matches", IndexName, d, primary_matches.TrueCount);
e.Start ();
int count = 0;
Document doc;
ArrayList hits = new ArrayList (primary_matches.TrueCount);
TermDocs secondary_term_docs = null;
if (secondary_searcher != null)
secondary_term_docs = secondary_searcher.Reader.TermDocs ();
FieldSelector fields = null;
if (predicate != null)
fields = new MapFieldSelector (new string[] { "Uri", "Timestamp", PropertyToFieldName (pred_type, predicate)});
for (int match_index = primary_matches.GetNextTrueIndex (0);
match_index < primary_matches.Count;
match_index = primary_matches.GetNextTrueIndex (++ match_index)) {
count++;
// If we have a HitFilter, apply it.
// RDF FIXME: Ignore Hit Filter for now
// If predicate was not specified but object was specified,
// then figure out the right predicate
if (predicate == null && field_value != null) {
Hit hit = new Hit ();
doc = primary_searcher.Doc (match_index);
hit.Uri = GetUriFromDocument (doc);
hit.Timestamp = StringFu.StringToDateTime (doc.Get ("Timestamp"));
bool found_matching_predicate = false;
foreach (Field field in doc.Fields ()) {
if (! FieldIsPredicate (field, field_value))
continue;
Property prop = new Property ();
prop.Type = pred_type;
prop.Key = predicate;
prop.Value = field_value;
hit.AddProperty (prop);
found_matching_predicate = true;
}
// Now get the matching predicate from the secondary index
if (secondary_searcher == null) {
doc = null;
} else {
Term term = new Term ("Uri", doc.Get ("Uri"));
secondary_term_docs.Seek (term);
if (secondary_term_docs.Next ())
doc = secondary_searcher.Doc (secondary_term_docs.Doc ());
}
if (doc != null) {
foreach (Field field in doc.Fields ()) {
if (! FieldIsPredicate (field, field_value))
continue;
Property prop = new Property ();
prop.Type = pred_type;
prop.Key = predicate;
prop.Value = field_value;
hit.AddProperty (prop);
found_matching_predicate = true;
}
}
if (! found_matching_predicate) {
// No matching predicate found
// This means some unstored field matched the query
// FIXME: Add a synthetic property #text
hit.AddProperty (Property.New ("#text", field_value));
}
hits.Add (hit);
} else if (predicate == "TextLinks") {
// Special treatment: TextLinks is not stored but can be queried
doc = primary_searcher.Doc (match_index, fields_timestamp_uri);
Hit hit = CreateHit (doc, secondary_reader, secondary_term_docs, fields);
if (field_value != null)
hit.AddProperty (Property.New ("TextLinks", field_value));
else {
foreach (Property text_link_property in GetTextLinks (hit.Uri, text_cache))
hit.AddProperty (text_link_property);
}
hits.Add (hit);
} else {
doc = primary_searcher.Doc (match_index, fields);
Hit hit = CreateHit (doc, secondary_reader, secondary_term_docs, fields);
foreach (Property prop in hit.Properties) {
if (prop.Key == predicate)
prop.Value = field_value;
}
hits.Add (hit);
}
}
e.Stop ();
if (Debug)
Log.Debug ("###### {0}: Query results generated in {1}", IndexName, e);
//
// Finally, we clean up after ourselves.
//
f.Start ();
CloseSearchers (primary_reader, primary_searcher, secondary_reader, secondary_searcher);
f.Stop ();
if (Debug)
Log.Debug ("###### {0}: Readers/searchers released in {1}", IndexName, f);
total.Stop ();
if (Debug) {
Log.Debug ("###### {0}: Query time breakdown:", IndexName);
Log.Debug ("###### {0}: Build queries {1,6} ({2:0.0}%)", IndexName, a, 100 * a.ElapsedTime / total.ElapsedTime);
Log.Debug ("###### {0}: Got readers {1,6} ({2:0.0}%)", IndexName, b, 100 * b.ElapsedTime / total.ElapsedTime);
Log.Debug ("###### {0}: Whitelists {1,6} ({2:0.0}%)", IndexName, c, 100 * c.ElapsedTime / total.ElapsedTime);
Log.Debug ("###### {0}: Queries {1,6} ({2:0.0}%)", IndexName, d, 100 * d.ElapsedTime / total.ElapsedTime);
Log.Debug ("###### {0}: Gen'd Results {1,6} ({2:0.0}%)", IndexName, e, 100 * e.ElapsedTime / total.ElapsedTime);
Log.Debug ("###### {0}: Reader cleanup {1,6} ({2:0.0}%)", IndexName, f, 100 * f.ElapsedTime / total.ElapsedTime);
Log.Debug ("###### {0}: TOTAL {1,6}", IndexName, total);
Logger.Log.Debug ("###### {0}: Total query run in {1}", IndexName, total);
}
return hits;
}