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/*
* Copyright (C) 2011, Nokia <ivan.frade@nokia.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <stdlib.h>
#include <libtracker-sparql/tracker-sparql.h>
typedef struct {
TrackerSparqlConnection *connection;
GCancellable *cancellable;
GTimer *timer;
GMainLoop *loop;
} MyData;
static void
cursor_cb (GObject *object,
GAsyncResult *res,
gpointer user_data)
{
TrackerSparqlCursor *cursor;
GError *error = NULL;
MyData *md = user_data;
gboolean more_results;
cursor = TRACKER_SPARQL_CURSOR (object);
more_results = tracker_sparql_cursor_next_finish (cursor,
res,
&error);
if (!error) {
static gint i = 0;
if (more_results) {
if (i++ < 5) {
if (i == 1) {
g_print ("Printing first 5 results:\n");
}
g_print (" %s\n", tracker_sparql_cursor_get_string (cursor, 0, NULL));
if (i == 5) {
g_print (" ...\n");
g_print (" Printing nothing for remaining results\n");
}
}
tracker_sparql_cursor_next_async (cursor,
md->cancellable,
cursor_cb,
md);
} else {
g_print ("\n");
g_print ("Async cursor next took: %.6f (for all %d results)\n",
g_timer_elapsed (md->timer, NULL), i);
tracker_sparql_cursor_close (cursor);
g_object_unref (cursor);
g_main_loop_quit (md->loop);
}
} else {
g_critical ("Could not run cursor next: %s", error->message);
g_error_free (error);
tracker_sparql_cursor_close (cursor);
g_object_unref (cursor);
g_main_loop_quit (md->loop);
}
}
static void
query_cb (GObject *object,
GAsyncResult *res,
gpointer user_data)
{
TrackerSparqlCursor *cursor;
GError *error = NULL;
MyData *md = user_data;
cursor = tracker_sparql_connection_query_finish (TRACKER_SPARQL_CONNECTION (object),
res,
&error);
g_print ("Async query took: %.6f\n", g_timer_elapsed (md->timer, NULL));
g_timer_start (md->timer);
if (!error) {
tracker_sparql_cursor_next_async (cursor,
md->cancellable,
cursor_cb,
md);
} else {
g_critical ("Could not run query: %s", error->message);
g_error_free (error);
g_main_loop_quit (md->loop);
}
}
static void
connection_cb (GObject *object,
GAsyncResult *res,
gpointer user_data)
{
MyData *md = user_data;
GError *error = NULL;
md->connection = tracker_sparql_connection_new_finish (res, &error);
g_print ("Async connection took: %.6f\n", g_timer_elapsed (md->timer, NULL));
g_timer_start (md->timer);
if (!error) {
tracker_sparql_connection_query_async (md->connection,
"SELECT ?r { ?r a rdfs:Resource }",
md->cancellable,
query_cb,
md);
} else {
g_critical ("Could not connect: %s", error->message);
g_error_free (error);
g_main_loop_quit (md->loop);
}
}
gint
main (gint argc, gchar *argv[])
{
g_autoptr(GFile) store, ontology;
MyData *md;
if (argc > 1) {
store = g_file_new_for_commandline_arg (argv[1]);
} else {
g_print ("Usage: <command> <store-path>\n");
exit (1);
}
md = g_new0 (MyData, 1);
md->loop = g_main_loop_new (NULL, FALSE);
md->timer = g_timer_new ();
md->cancellable = g_cancellable_new ();
ontology = tracker_sparql_get_ontology_nepomuk ();
tracker_sparql_connection_new_async (0,
store,
ontology,
md->cancellable,
connection_cb,
md);
g_main_loop_run (md->loop);
if (md->connection) {
g_object_unref (md->connection);
}
g_cancellable_cancel (md->cancellable);
g_object_unref (md->cancellable);
g_timer_destroy (md->timer);
g_main_loop_unref (md->loop);
g_free (md);
return EXIT_SUCCESS;
}
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