Made the last scan step (checking for removed files) faster on big libraries

2024-03-14 23:21:30 +01:00
parent 071b86602e
commit 03425f3c94
4 changed files with 104 additions and 34 deletions
@@ -228,6 +228,32 @@ namespace lms::db
            .resultValue();
    }

+    void Track::find(Session& session, TrackId& lastRetrievedTrack, std::size_t batchSize, bool& moreResults, const std::function<void(const Track::pointer&)>& func)
+    {
+        session.checkReadTransaction();
+
+        auto collection{ session.getDboSession().find<Track>()
+            .orderBy("id")
+            .where("id > ?").bind(lastRetrievedTrack)
+            .limit(static_cast<int>(batchSize) + 1)
+            .resultList() };
+
+        moreResults = false;
+
+        std::size_t count{};
+        for (auto itResult{ collection.begin() }; itResult != collection.end(); ++itResult)
+        {
+            if (count++ == batchSize)
+            {
+                moreResults = true;
+                break;
+            }
+
+            func(*itResult);
+            lastRetrievedTrack = (*itResult)->getId();
+        }
+    }
+
    bool Track::exists(Session& session, TrackId id)
    {
        session.checkReadTransaction();