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Subsonic API: cached cluster stats for track and releases, in order to make the getGenre entrypoint efficient on large databases

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This commit is contained in:
emeric
2023-11-08 20:26:24 +01:00
parent c2e1c5d9df
commit 121d27b5cd
20 changed files with 301 additions and 101 deletions
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src/libs/services/database/impl/Cluster.cpp
+44 -13
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@@ -32,11 +32,12 @@ namespace Database
{
namespace
{
Wt::Dbo::Query<Cluster::ClusterFindResult> createQuery(Session& session, const Cluster::FindParameters& params)
template <typename ResultType>
Wt::Dbo::Query<ResultType> createQuery(Session& session, std::string_view itemToSelect, const Cluster::FindParameters& params)
{
session.checkSharedLocked();
auto query{ session.getDboSession().query<Cluster::ClusterFindResult>("SELECT DISTINCT c.id,c.name FROM cluster c") };
auto query{ session.getDboSession().query<ResultType>("SELECT DISTINCT " + std::string{ itemToSelect } + " FROM cluster c") };
if (params.track.isValid() || params.release.isValid())
{
@@ -54,6 +55,21 @@ namespace Database
return query;
}
template <typename ResultType>
Wt::Dbo::Query<ResultType> createQuery(Session& session, const Cluster::FindParameters& params)
{
std::string_view itemToSelect;
if constexpr (std::is_same_v<ResultType, ClusterId>)
itemToSelect = "c.id";
else if constexpr (std::is_same_v<ResultType, Wt::Dbo::ptr<Cluster>>)
itemToSelect = "c";
else
static_assert("Unhandled type");
return createQuery<ResultType>(session, itemToSelect, params);
}
}
Cluster::Cluster(ObjectPtr<ClusterType> type, std::string_view name)
@@ -74,10 +90,18 @@ namespace Database
return session.getDboSession().query<int>("SELECT COUNT(*) FROM cluster");
}
RangeResults<Cluster::ClusterFindResult> Cluster::find(Session& session, const FindParameters& params)
RangeResults<ClusterId> Cluster::findIds(Session& session, const FindParameters& params)
{
session.checkSharedLocked();
auto query{ createQuery(session, params) };
auto query{ createQuery<ClusterId>(session, params) };
return Utils::execQuery(query, params.range);
}
RangeResults<Cluster::pointer> Cluster::find(Session& session, const FindParameters& params)
{
session.checkSharedLocked();
auto query{ createQuery<Wt::Dbo::ptr<Cluster>>(session, params) };
return Utils::execQuery(query, params.range);
}
@@ -97,6 +121,22 @@ namespace Database
return session.getDboSession().find<Cluster>().where("id = ?").bind(id).resultValue();
}
std::size_t Cluster::computeTrackCount(Session& session, ClusterId id)
{
session.checkSharedLocked();
return session.getDboSession().query<int>("SELECT COUNT(t.id) FROM track t INNER JOIN track_cluster t_c ON t_c.track_id = t.id")
.where("t_c.cluster_id = ?").bind(id).resultValue();
}
std::size_t Cluster::computeReleaseCount(Session& session, ClusterId id)
{
session.checkSharedLocked();
return session.getDboSession().query<int>("SELECT COUNT(DISTINCT r.id) FROM release r INNER JOIN track t on t.release_id = r.id INNER JOIN track_cluster t_c ON t_c.track_id = t.id")
.where("t_c.cluster_id = ?").bind(id).resultValue();
}
void Cluster::addTrack(ObjectPtr<Track> track)
{
_tracks.insert(getDboPtr(track));
@@ -112,15 +152,6 @@ namespace Database
return Utils::execQuery(query, range);
}
std::size_t Cluster::getReleasesCount() const
{
assert(session());
return session()->query<int>("SELECT COUNT(DISTINCT r.id) FROM release r INNER JOIN track t on t.release_id = r.id INNER JOIN cluster c ON c.id = t_c.cluster_id INNER JOIN track_cluster t_c ON t_c.track_id = t.id")
.where("c.id = ?").bind(getId());
}
ClusterType::ClusterType(std::string_view name)
: _name{ name }
{