private void OnQueryDriverChanged (Queryable queryable, IQueryableChangeData change_data)
{
bool is_indexing = QueryDriver.IsIndexing;
if (is_indexing && crawl_status == IndexingStatus.NotRunning)
SendIndexingStatusResponse (IndexingStatus.Running);
else if (! is_indexing && crawl_status == IndexingStatus.Running)
SendIndexingStatusResponse (IndexingStatus.NotRunning);
}
public override ResponseMessage Execute(RequestMessage req)
{
SnippetRequest request = (SnippetRequest)req;
Queryable queryable = QueryDriver.GetQueryable(request.Hit.Source);
ISnippetReader snippet_reader;
bool full_text = request.FullText;
int ctx_length = request.ContextLength;
int snp_length = request.SnippetLength;
if (queryable == null)
{
Log.Error("SnippetExecutor: No queryable object matches '{0}'", request.Hit.Source);
snippet_reader = new SnippetReader(null, null, false, -1, -1);
full_text = false;
}
else
{
snippet_reader = queryable.GetSnippet(request.QueryTerms, request.Hit, full_text, ctx_length, snp_length);
}
return(new SnippetResponse(new SnippetList(full_text, snippet_reader)));
}
// Instantiates and loads a StaticQueryable from an index directory
internal static Queryable LoadStaticQueryable (DirectoryInfo index_dir, QueryDomain query_domain)
{
StaticQueryable static_queryable = null;
if (!index_dir.Exists)
return null;
try {
static_queryable = new StaticQueryable (index_dir.Name, index_dir.FullName, true);
} catch (InvalidOperationException) {
Logger.Log.Warn ("Unable to create read-only index (likely due to index version mismatch): {0}", index_dir.FullName);
return null;
} catch (Exception e) {
Logger.Log.Error (e, "Caught exception while instantiating static queryable: {0}", index_dir.Name);
return null;
}
if (static_queryable == null)
return null;
// Load StaticIndex.xml from index_dir.FullName/config
string config_file_path = Path.Combine (index_dir.FullName, "StaticIndex.xml");
Config static_index_config;
try {
static_index_config = Conf.LoadFrom (config_file_path);
if (static_index_config == null) {
Log.Error ("Unable to read config from {0}", config_file_path);
return null;
}
} catch (Exception e) {
Log.Error (e, "Caught exception while reading config from {0}", config_file_path);
return null;
}
string source = static_index_config.GetOption ("Source", null);
if (source == null) {
Log.Error ("Invalid config file: {0}", config_file_path);
return null;
}
QueryableFlavor flavor = new QueryableFlavor ();
flavor.Name = source;
flavor.Domain = query_domain;
Queryable queryable = new Queryable (flavor, static_queryable);
return queryable;
}
static public void DoOneQuery (Queryable queryable,
Query query,
QueryResult result,
IQueryableChangeData change_data)
{
try {
if (queryable.AcceptQuery (query)) {
QueryClosure qc = new QueryClosure (queryable, query, result, change_data);
result.AttachWorker (qc);
}
} catch (Exception ex) {
Logger.Log.Warn (ex, "Caught exception calling DoOneQuery on '{0}'", queryable.Name);
}
}
public QueryClosure (Queryable queryable,
Query query,
QueryResult result,
IQueryableChangeData change_data)
{
this.queryable = queryable;
this.query = query;
this.result = result;
this.change_data = change_data;
}
// (1) register themselves in AssemblyInfo.cs:IQueryableTypes and
// (2) has a QueryableFlavor attribute attached
// assemble a Queryable object and stick it into our list of queryables.
static void ScanAssemblyForQueryables (Assembly assembly)
{
int count = 0;
foreach (Type type in ReflectionFu.GetTypesFromAssemblyAttribute (assembly, typeof (IQueryableTypesAttribute))) {
foreach (QueryableFlavor flavor in ReflectionFu.ScanTypeForAttribute (type, typeof (QueryableFlavor))) {
if (! UseQueryable (flavor.Name))
continue;
if (flavor.RequireInotify && ! Inotify.Enabled) {
Logger.Log.Warn ("Can't start backend '{0}' without inotify", flavor.Name);
continue;
}
if (flavor.RequireExtendedAttributes && ! ExtendedAttribute.Supported) {
Logger.Log.Warn ("Can't start backend '{0}' without extended attributes", flavor.Name);
continue;
}
IQueryable iq = null;
try {
iq = Activator.CreateInstance (type) as IQueryable;
} catch (Exception e) {
Logger.Log.Error (e, "Caught exception while instantiating {0} backend", flavor.Name);
}
if (iq != null) {
Queryable q = new Queryable (flavor, iq);
iqueryable_to_queryable [iq] = q;
++count;
break;
}
}
}
Logger.Log.Debug ("Found {0} backends in {1}", count, assembly.Location);
}
private void OnQueryDriverChanged (Queryable queryable, IQueryableChangeData change_data)
{
if (this.result != null)
QueryDriver.DoOneQuery (queryable, this.query, this.result, change_data);
}
