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Added a query plan recorder for debugging purposes

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This commit is contained in:
emeric
2025-07-11 00:11:02 +02:00
parent 2fd7d9767b
commit 59e85ee424
29 changed files with 546 additions and 44 deletions
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approot/admin-db.xml
+14
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@@ -0,0 +1,14 @@
<?xml version="1.0" encoding="UTF-8" ?>
<messages xmlns:if="Wt.WTemplate.conditions">
<message id="Lms.Admin.DebugTools.Db.template">
<form>
<div class="row g-3">
<div class="col-12">
${export-query-plans-btn class="btn btn-primary"}
</div>
</div>
</form>
</message>
</messages>
approot/admin-debugtools.xml
+15
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@@ -0,0 +1,15 @@
<?xml version="1.0" encoding="UTF-8" ?>
<messages xmlns:if="Wt.WTemplate.conditions">
<message id="Lms.Admin.DebugTools.template">
<form>
<legend>${tr:Lms.Admin.DebugTools.Tracing.tracing}</legend>
${tracing}
<hr/>
<legend>${tr:Lms.Admin.DebugTools.Db.db}</legend>
${db}
</form>
</message>
</messages>
approot/admin-tracing.xml
+1 -2
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@@ -1,9 +1,8 @@
<?xml version="1.0" encoding="UTF-8" ?> <?xml version="1.0" encoding="UTF-8" ?>
<messages xmlns:if="Wt.WTemplate.conditions"> <messages xmlns:if="Wt.WTemplate.conditions">
<message id="Lms.Admin.Tracing.template"> <message id="Lms.Admin.DebugTools.Tracing.template">
<form> <form>
<legend>${tr:Lms.Admin.Tracing.tracing}</legend>
<div class="row g-3"> <div class="row g-3">
<div class="col-12"> <div class="col-12">
${export-btn class="btn btn-primary"} ${export-btn class="btn btn-primary"}
approot/main.xml
+4 -1
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@@ -44,7 +44,10 @@
<li>${scan-settings class="dropdown-item"}</li> <li>${scan-settings class="dropdown-item"}</li>
<li>${scanner class="dropdown-item"}</li> <li>${scanner class="dropdown-item"}</li>
<li>${users class="dropdown-item"}</li> <li>${users class="dropdown-item"}</li>
<li>${tracing class="dropdown-item"}</li> ${<if-debug-tools>}
<li class="dropdown-divider"></li>
<li>${debug-tools class="dropdown-item"}</li>
${</if-debug-tools>}
</ul> </ul>
</li> </li>
${</if-is-admin>} ${</if-is-admin>}
approot/messages.xml
+10 -3
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@@ -52,10 +52,10 @@
<message id="Lms.Error.user-not-found">User not found</message> <message id="Lms.Error.user-not-found">User not found</message>
<!--Administration--> <!--Administration-->
<message id="Lms.Admin.menu-debug-tools"><i class="fa fa-fw fa-bug" aria-hidden="true"></i> Debug tools</message>
<message id="Lms.Admin.menu-media-libraries"><i class="fa fa-fw fa-database" aria-hidden="true"></i> Libraries</message> <message id="Lms.Admin.menu-media-libraries"><i class="fa fa-fw fa-database" aria-hidden="true"></i> Libraries</message>
<message id="Lms.Admin.menu-scan-settings"><i class="fa fa-fw fa-cogs" aria-hidden="true"></i> Scan settings</message> <message id="Lms.Admin.menu-scan-settings"><i class="fa fa-fw fa-cogs" aria-hidden="true"></i> Scan settings</message>
<message id="Lms.Admin.menu-scanner"><i class="fa fa-fw fa-wrench" aria-hidden="true"></i> Scanner</message> <message id="Lms.Admin.menu-scanner"><i class="fa fa-fw fa-wrench" aria-hidden="true"></i> Scanner</message>
<message id="Lms.Admin.menu-tracing"><i class="fa fa-fw fa-bar-chart" aria-hidden="true"></i> Tracing</message>
<message id="Lms.Admin.menu-users"><i class="fa fa-fw fa-users" aria-hidden="true"></i> Users</message> <message id="Lms.Admin.menu-users"><i class="fa fa-fw fa-users" aria-hidden="true"></i> Users</message>
<!--MediaLibraries--> <!--MediaLibraries-->
@@ -149,9 +149,16 @@
<message id="Lms.Admin.ScannerController.step-status">Step status</message> <message id="Lms.Admin.ScannerController.step-status">Step status</message>
<message id="Lms.Admin.ScannerController.step-updating-library-fields">Updating library fields: {1} entries</message> <message id="Lms.Admin.ScannerController.step-updating-library-fields">Updating library fields: {1} entries</message>
<!--Debug Tools-->
<message id="Lms.Admin.DebugTools.debug-tools">Debug tools</message>
<!--Db-->
<message id="Lms.Admin.DebugTools.Db.export-query-plans">Export query plans</message>
<message id="Lms.Admin.DebugTools.Db.db">Database</message>
<!--Tracing--> <!--Tracing-->
<message id="Lms.Admin.Tracing.export-current-buffer">Export traces</message> <message id="Lms.Admin.DebugTools.Tracing.export-current-buffer">Export traces</message>
<message id="Lms.Admin.Tracing.tracing">Tracing</message> <message id="Lms.Admin.DebugTools.Tracing.tracing">Tracing</message>
<!--Users--> <!--Users-->
<message id="Lms.Admin.Users.add">New user</message> <message id="Lms.Admin.Users.add">New user</message>
approot/messages_es.xml
+10 -3
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@@ -52,10 +52,10 @@
<message id="Lms.Error.user-not-found">No existe el usuario</message> <message id="Lms.Error.user-not-found">No existe el usuario</message>
<!--Administration--> <!--Administration-->
<message id="Lms.Admin.menu-debug-tools"><i class="fa fa-fw fa-bug" aria-hidden="true"></i> Herramientas de depuración</message>
<message id="Lms.Admin.menu-media-libraries"><i class="fa fa-fw fa-database" aria-hidden="true"></i> Bibliotecas</message> <message id="Lms.Admin.menu-media-libraries"><i class="fa fa-fw fa-database" aria-hidden="true"></i> Bibliotecas</message>
<message id="Lms.Admin.menu-scan-settings"><i class="fa fa-fw fa-cogs" aria-hidden="true"></i> Opciones de escaneo</message> <message id="Lms.Admin.menu-scan-settings"><i class="fa fa-fw fa-cogs" aria-hidden="true"></i> Opciones de escaneo</message>
<message id="Lms.Admin.menu-scanner"><i class="fa fa-fw fa-wrench" aria-hidden="true"></i> Escanear</message> <message id="Lms.Admin.menu-scanner"><i class="fa fa-fw fa-wrench" aria-hidden="true"></i> Escanear</message>
<message id="Lms.Admin.menu-tracing"><i class="fa fa-fw fa-bar-chart" aria-hidden="true"></i> Traces</message>
<message id="Lms.Admin.menu-users"><i class="fa fa-fw fa-users" aria-hidden="true"></i> Usuarios</message> <message id="Lms.Admin.menu-users"><i class="fa fa-fw fa-users" aria-hidden="true"></i> Usuarios</message>
<!--MediaLibraries--> <!--MediaLibraries-->
@@ -148,9 +148,16 @@
<message id="Lms.Admin.ScannerController.step-status">Estado de las etapas</message> <message id="Lms.Admin.ScannerController.step-status">Estado de las etapas</message>
<message id="Lms.Admin.ScannerController.step-updating-library-fields">Actualizando campos de la biblioteca: {1} entradas</message> <message id="Lms.Admin.ScannerController.step-updating-library-fields">Actualizando campos de la biblioteca: {1} entradas</message>
<!--Debug Tools-->
<message id="Lms.Admin.DebugTools.debug-tools">Herramientas de depuración</message>
<!--Db-->
<message id="Lms.Admin.DebugTools.Db.export-query-plans">Exportar planes de consulta</message>
<message id="Lms.Admin.DebugTools.Db.db">Base de datos</message>
<!--Tracing--> <!--Tracing-->
<message id="Lms.Admin.Tracing.export-current-buffer">Exportar las trazas</message> <message id="Lms.Admin.DebugTools.Tracing.export-current-buffer">Exportar las trazas</message>
<message id="Lms.Admin.Tracing.tracing">Trazas</message> <message id="Lms.Admin.DebugTools.Tracing.tracing">Trazas</message>
<!--Users--> <!--Users-->
<message id="Lms.Admin.Users.add">Añadir</message> <message id="Lms.Admin.Users.add">Añadir</message>
approot/messages_fr.xml
+10 -3
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@@ -52,10 +52,10 @@
<message id="Lms.Error.user-not-found">L'utilisateur n'existe pas</message> <message id="Lms.Error.user-not-found">L'utilisateur n'existe pas</message>
<!--Administration--> <!--Administration-->
<message id="Lms.Admin.menu-debug-tools"><i class="fa fa-fw fa-bug" aria-hidden="true"></i> Outils de débogage</message>
<message id="Lms.Admin.menu-media-libraries"><i class="fa fa-fw fa-database" aria-hidden="true"></i> Bibliothèques</message> <message id="Lms.Admin.menu-media-libraries"><i class="fa fa-fw fa-database" aria-hidden="true"></i> Bibliothèques</message>
<message id="Lms.Admin.menu-scan-settings"><i class="fa fa-fw fa-cogs" aria-hidden="true"></i> Paramètres du scan</message> <message id="Lms.Admin.menu-scan-settings"><i class="fa fa-fw fa-cogs" aria-hidden="true"></i> Paramètres du scan</message>
<message id="Lms.Admin.menu-scanner"><i class="fa fa-fw fa-wrench" aria-hidden="true"></i> Scanner</message> <message id="Lms.Admin.menu-scanner"><i class="fa fa-fw fa-wrench" aria-hidden="true"></i> Scanner</message>
<message id="Lms.Admin.menu-tracing"><i class="fa fa-fw fa-bar-chart" aria-hidden="true"></i> Traces</message>
<message id="Lms.Admin.menu-users"><i class="fa fa-fw fa-users" aria-hidden="true"></i> Utilisateurs</message> <message id="Lms.Admin.menu-users"><i class="fa fa-fw fa-users" aria-hidden="true"></i> Utilisateurs</message>
<!--MediaLibraries--> <!--MediaLibraries-->
@@ -148,9 +148,16 @@
<message id="Lms.Admin.ScannerController.step-status">Statut de l'étape</message> <message id="Lms.Admin.ScannerController.step-status">Statut de l'étape</message>
<message id="Lms.Admin.ScannerController.step-updating-library-fields">Mise à jour des champs des bibliothèques: {1} entrées</message> <message id="Lms.Admin.ScannerController.step-updating-library-fields">Mise à jour des champs des bibliothèques: {1} entrées</message>
<!--Debug Tools-->
<message id="Lms.Admin.DebugTools.debug-tools">Outils de débogage</message>
<!--Db-->
<message id="Lms.Admin.DebugTools.Db.export-query-plans">Exporter les plans de requête</message>
<message id="Lms.Admin.DebugTools.Db.db">Base de données</message>
<!--Tracing--> <!--Tracing-->
<message id="Lms.Admin.Tracing.export-current-buffer">Exporter les traces</message> <message id="Lms.Admin.DebugTools.Tracing.export-current-buffer">Exporter les traces</message>
<message id="Lms.Admin.Tracing.tracing">Traces</message> <message id="Lms.Admin.DebugTools.Tracing.tracing">Traces</message>
<!--Users--> <!--Users-->
<message id="Lms.Admin.Users.add">Ajouter</message> <message id="Lms.Admin.Users.add">Ajouter</message>
approot/messages_it.xml
+10 -3
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@@ -52,10 +52,10 @@
<message id="Lms.Error.user-not-found">Utente non trovato</message> <message id="Lms.Error.user-not-found">Utente non trovato</message>
<!--Administration--> <!--Administration-->
<message id="Lms.Admin.menu-debug-tools"><i class="fa fa-fw fa-bug" aria-hidden="true"></i> Strumenti di debug</message>
<message id="Lms.Admin.menu-media-libraries"><i class="fa fa-fw fa-database" aria-hidden="true"></i> Librerie</message> <message id="Lms.Admin.menu-media-libraries"><i class="fa fa-fw fa-database" aria-hidden="true"></i> Librerie</message>
<message id="Lms.Admin.menu-scan-settings"><i class="fa fa-fw fa-cogs" aria-hidden="true"></i> Impostazioni di scansione</message> <message id="Lms.Admin.menu-scan-settings"><i class="fa fa-fw fa-cogs" aria-hidden="true"></i> Impostazioni di scansione</message>
<message id="Lms.Admin.menu-scanner"><i class="fa fa-fw fa-wrench" aria-hidden="true"></i> Scanner</message> <message id="Lms.Admin.menu-scanner"><i class="fa fa-fw fa-wrench" aria-hidden="true"></i> Scanner</message>
<message id="Lms.Admin.menu-tracing"><i class="fa fa-fw fa-bar-chart" aria-hidden="true"></i> Tracing</message>
<message id="Lms.Admin.menu-users"><i class="fa fa-fw fa-users" aria-hidden="true"></i> Utenti</message> <message id="Lms.Admin.menu-users"><i class="fa fa-fw fa-users" aria-hidden="true"></i> Utenti</message>
<!--MediaLibraries--> <!--MediaLibraries-->
@@ -148,9 +148,16 @@
<message id="Lms.Admin.ScannerController.step-status">Stato passo</message> <message id="Lms.Admin.ScannerController.step-status">Stato passo</message>
<message id="Lms.Admin.ScannerController.step-updating-library-fields">Aggiornamento dei campi della libreria: {1} voci</message> <message id="Lms.Admin.ScannerController.step-updating-library-fields">Aggiornamento dei campi della libreria: {1} voci</message>
<!--Debug Tools-->
<message id="Lms.Admin.DebugTools.debug-tools">Strumenti di debug</message>
<!--Db-->
<message id="Lms.Admin.DebugTools.Db.export-query-plans">Esporta i piani di query</message>
<message id="Lms.Admin.DebugTools.Db.db">Database</message>
<!--Tracing--> <!--Tracing-->
<message id="Lms.Admin.Tracing.export-current-buffer">Esporta tracce</message> <message id="Lms.Admin.DebugTools.Tracing.export-current-buffer">Esporta tracce</message>
<message id="Lms.Admin.Tracing.tracing">Tracing</message> <message id="Lms.Admin.DebugTools.Tracing.tracing">Tracing</message>
<!--Users--> <!--Users-->
<message id="Lms.Admin.Users.add">Nuovo utente</message> <message id="Lms.Admin.Users.add">Nuovo utente</message>
approot/messages_pl.xml
+10 -3
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@@ -53,10 +53,10 @@
<message id="Lms.Error.user-not-found">Użytkownik nie odnaleziony</message> <message id="Lms.Error.user-not-found">Użytkownik nie odnaleziony</message>
<!--Administration--> <!--Administration-->
<message id="Lms.Admin.menu-debug-tools"><i class="fa fa-fw fa-bug" aria-hidden="true"></i> Narzędzia debugowania</message>
<message id="Lms.Admin.menu-media-libraries"><i class="fa fa-fw fa-database" aria-hidden="true"></i> Biblioteki</message> <message id="Lms.Admin.menu-media-libraries"><i class="fa fa-fw fa-database" aria-hidden="true"></i> Biblioteki</message>
<message id="Lms.Admin.menu-scan-settings"><i class="fa fa-fw fa-cogs" aria-hidden="true"></i> Ustawienia skanowania</message> <message id="Lms.Admin.menu-scan-settings"><i class="fa fa-fw fa-cogs" aria-hidden="true"></i> Ustawienia skanowania</message>
<message id="Lms.Admin.menu-scanner"><i class="fa fa-fw fa-wrench" aria-hidden="true"></i> Skaner</message> <message id="Lms.Admin.menu-scanner"><i class="fa fa-fw fa-wrench" aria-hidden="true"></i> Skaner</message>
<message id="Lms.Admin.menu-tracing"><i class="fa fa-fw fa-bar-chart" aria-hidden="true"></i> Śledzenie</message>
<message id="Lms.Admin.menu-users"><i class="fa fa-fw fa-users" aria-hidden="true"></i> Użytkownicy</message> <message id="Lms.Admin.menu-users"><i class="fa fa-fw fa-users" aria-hidden="true"></i> Użytkownicy</message>
<!--MediaLibraries--> <!--MediaLibraries-->
@@ -165,9 +165,16 @@
<message id="Lms.Admin.ScannerController.step-status">Obecny krok</message> <message id="Lms.Admin.ScannerController.step-status">Obecny krok</message>
<message id="Lms.Admin.ScannerController.step-updating-library-fields">Aktualizowanie pól biblioteki: {1} wpisów</message> <message id="Lms.Admin.ScannerController.step-updating-library-fields">Aktualizowanie pól biblioteki: {1} wpisów</message>
<!--Debug Tools-->
<message id="Lms.Admin.DebugTools.debug-tools">Narzędzia debugowania</message>
<!--Db-->
<message id="Lms.Admin.DebugTools.Db.export-query-plans">Eksportuj plany zapytań</message>
<message id="Lms.Admin.DebugTools.Db.db">Baza danych</message>
<!--Tracing--> <!--Tracing-->
<message id="Lms.Admin.Tracing.export-current-buffer">Eksportuj ślady</message> <message id="Lms.Admin.DebugTools.Tracing.export-current-buffer">Eksportuj ślady</message>
<message id="Lms.Admin.Tracing.tracing">Śledzenie</message> <message id="Lms.Admin.DebugTools.Tracing.tracing">Śledzenie</message>
<!--Users--> <!--Users-->
<message id="Lms.Admin.Users.add">Nowy użytkownik</message> <message id="Lms.Admin.Users.add">Nowy użytkownik</message>
approot/messages_zh.xml
+6
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@@ -145,6 +145,12 @@
<message id="Lms.Admin.ScannerController.step-status">当前步骤状态</message> <message id="Lms.Admin.ScannerController.step-status">当前步骤状态</message>
<!--Debug Tools-->
<!--Db-->
<!--Tracing--> <!--Tracing-->
conf/lms.conf
+4
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@@ -17,7 +17,11 @@ log-min-severity = "info";
# Can be "none", "quick", or "full" # Can be "none", "quick", or "full"
db-integrity-check = "quick"; db-integrity-check = "quick";
# Output db queries on stdout # Output db queries on stdout
# Use this only for debugging purpose, as this may impact performance
db-show-queries = false; db-show-queries = false;
# Record query plans for database queries.
# Use this only for debugging purposes, as this may impact performance
db-record-query-plans = false;
# Listen port/addr of the web server # Listen port/addr of the web server
listen-port = 5082; listen-port = 5082;
src/libs/av/impl/AudioFile.cpp
-1
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@@ -28,7 +28,6 @@ extern "C"
} }
#include <array> #include <array>
#include <map>
#include <unordered_map> #include <unordered_map>
#include "core/ILogger.hpp" #include "core/ILogger.hpp"
src/libs/database/CMakeLists.txt
+1
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@@ -32,6 +32,7 @@ add_library(lmsdatabase STATIC
impl/IdType.cpp impl/IdType.cpp
impl/Migration.cpp impl/Migration.cpp
impl/Object.cpp impl/Object.cpp
impl/QueryPlanRecorder.cpp
impl/Session.cpp impl/Session.cpp
impl/SqlQuery.cpp impl/SqlQuery.cpp
impl/Transaction.cpp impl/Transaction.cpp
src/libs/database/impl/Db.cpp
+3 -3
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@@ -206,7 +206,7 @@ namespace lms::db
LMS_LOG(DB, INFO, "Performing quick database check..."); LMS_LOG(DB, INFO, "Performing quick database check...");
// Quick check is just a simple integrity check // Quick check is just a simple integrity check
bool quickCheckPassed{ checkDbIntegrity(*connection, IntegrityCheckType::Quick, [&](std::string_view error) { const bool quickCheckPassed{ checkDbIntegrity(*connection, IntegrityCheckType::Quick, [&](std::string_view error) {
LMS_LOG(DB, ERROR, "Quick check error: " << error); LMS_LOG(DB, ERROR, "Quick check error: " << error);
}) }; }) };
@@ -222,7 +222,7 @@ namespace lms::db
LMS_LOG(DB, INFO, "Checking database integrity..."); LMS_LOG(DB, INFO, "Checking database integrity...");
bool integrityCheckPassed{ checkDbIntegrity(*connection, IntegrityCheckType::Full, [&](std::string_view error) { const bool integrityCheckPassed{ checkDbIntegrity(*connection, IntegrityCheckType::Full, [&](std::string_view error) {
LMS_LOG(DB, ERROR, "Integrity check error: " << error); LMS_LOG(DB, ERROR, "Integrity check error: " << error);
}) }; }) };
@@ -238,7 +238,7 @@ namespace lms::db
LMS_LOG(DB, INFO, "Checking foreign key constraints..."); LMS_LOG(DB, INFO, "Checking foreign key constraints...");
bool foreignKeyConstraintsPassed{ checkDbForeignKeyConstraints(*connection, [&](std::string_view table, long long rowId, std::string_view referredTable) { const bool foreignKeyConstraintsPassed{ checkDbForeignKeyConstraints(*connection, [&](std::string_view table, long long rowId, std::string_view referredTable) {
LMS_LOG(DB, ERROR, "Foreign key constraint failed in table '" << table << "', rowid = " << rowId << ", referred table = '" << referredTable << "'"); LMS_LOG(DB, ERROR, "Foreign key constraint failed in table '" << table << "', rowid = " << rowId << ", referred table = '" << referredTable << "'");
}) }; }) };
src/libs/database/impl/Db.hpp
+2 -2
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@@ -36,8 +36,6 @@ namespace lms::db
public: public:
Db(const std::filesystem::path& dbPath, std::size_t connectionCount); Db(const std::filesystem::path& dbPath, std::size_t connectionCount);
Session& getTLSSession() override;
void executeSql(const std::string& sql); void executeSql(const std::string& sql);
private: private:
@@ -46,6 +44,8 @@ namespace lms::db
friend class Session; friend class Session;
Session& getTLSSession() override;
core::RecursiveSharedMutex& getMutex() { return _sharedMutex; } core::RecursiveSharedMutex& getMutex() { return _sharedMutex; }
Wt::Dbo::SqlConnectionPool& getConnectionPool() { return *_connectionPool; } Wt::Dbo::SqlConnectionPool& getConnectionPool() { return *_connectionPool; }
src/libs/database/impl/QueryPlanRecorder.cpp
+112
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@@ -0,0 +1,112 @@
/*
* Copyright (C) 2025 Emeric Poupon
*
* This file is part of LMS.
*
* LMS 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 3 of the License, or
* (at your option) any later version.
*
* LMS 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 LMS. If not, see <http://www.gnu.org/licenses/>.
*/
#include "QueryPlanRecorder.hpp"
#include <memory>
#include <mutex>
#include <Wt/Dbo/SqlStatement.h>
#include <Wt/Dbo/Transaction.h>
#include "core/ILogger.hpp"
namespace lms::db
{
std::unique_ptr<IQueryPlanRecorder> createQueryPlanRecorder()
{
return std::make_unique<QueryPlanRecorder>();
}
QueryPlanRecorder::QueryPlanRecorder()
{
LMS_LOG(DB, INFO, "Recording database query plans");
}
QueryPlanRecorder::~QueryPlanRecorder() = default;
void QueryPlanRecorder::visitQueryPlans(const QueryPlanVisitor& visitor) const
{
const std::shared_lock lock{ _mutex };
for (const auto& [query, plan] : _queryPlans)
visitor(query, plan);
}
void QueryPlanRecorder::recordQueryPlanIfNeeded(Wt::Dbo::Session& session, const std::string& query)
{
{
const std::shared_lock lock{ _mutex };
if (_queryPlans.contains(query))
return;
}
Wt::Dbo::Transaction transaction{ session };
Wt::Dbo::SqlConnection* connection{ transaction.connection() };
auto statement{ connection->prepareStatement("EXPLAIN QUERY PLAN " + query) };
statement->execute();
std::map<int, std::string> entries{ { 0, "" } };
std::map<int, std::vector<int>> relationships;
std::string detail;
while (statement->nextRow())
{
detail.clear();
int id{};
int parent{};
int unused{};
if (statement->getResult(0, &id)
&& statement->getResult(1, &parent)
&& statement->getResult(2, &unused)
&& statement->getResult(3, &detail, static_cast<int>(detail.capacity())))
{
entries.emplace(id, detail);
relationships[parent].push_back(id);
}
}
// format
std::string result;
std::function<void(int, unsigned)> formatQuery = [&](int id, unsigned level) -> void {
for (std::size_t i{}; i < level; ++i)
result += '\t';
result += entries.at(id);
result += '\n';
auto itChildren = relationships.find(id);
if (itChildren == relationships.end())
return;
for (int child : itChildren->second)
formatQuery(child, level + 1);
};
formatQuery(0, 0);
{
const std::unique_lock lock{ _mutex };
_queryPlans.try_emplace(query, std::move(result));
}
}
} // namespace lms::db
src/libs/database/impl/QueryPlanRecorder.hpp
+48
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@@ -0,0 +1,48 @@
/*
* Copyright (C) 2025 Emeric Poupon
*
* This file is part of LMS.
*
* LMS 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 3 of the License, or
* (at your option) any later version.
*
* LMS 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 LMS. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <map>
#include <shared_mutex>
#include <string>
#include <Wt/Dbo/Session.h>
#include "database/IQueryPlanRecorder.hpp"
namespace lms::db
{
class QueryPlanRecorder : public IQueryPlanRecorder
{
public:
QueryPlanRecorder();
~QueryPlanRecorder() override;
QueryPlanRecorder(const QueryPlanRecorder&) = delete;
QueryPlanRecorder& operator=(const QueryPlanRecorder&) = delete;
void visitQueryPlans(const QueryPlanVisitor& visitor) const override;
void recordQueryPlanIfNeeded(Wt::Dbo::Session& session, const std::string& query);
private:
mutable std::shared_mutex _mutex;
std::map<std::string, std::string> _queryPlans;
};
} // namespace lms::db
src/libs/database/impl/Utils.hpp
+28 -4
View File
@@ -19,22 +19,39 @@
#pragma once #pragma once
#include <functional>
#include <string> #include <string>
#include <string_view> #include <string_view>
#include <Wt/Dbo/Dbo.h> #include <Wt/Dbo/Call.h>
#include <Wt/Dbo/Query.h>
#include <Wt/Dbo/Session.h>
#include <Wt/Dbo/collection.h>
#include <Wt/WDateTime.h> #include <Wt/WDateTime.h>
#include "core/ITraceLogger.hpp" #include "core/ITraceLogger.hpp"
#include "core/Service.hpp"
#include "database/Types.hpp" #include "database/Types.hpp"
#include "QueryPlanRecorder.hpp"
namespace lms::db::utils namespace lms::db::utils
{ {
#define ESCAPE_CHAR_STR "\\" #define ESCAPE_CHAR_STR "\\"
static inline constexpr char escapeChar{ '\\' }; static inline constexpr char escapeChar{ '\\' };
std::string escapeLikeKeyword(std::string_view keywords); std::string escapeLikeKeyword(std::string_view keywords);
Wt::WDateTime normalizeDateTime(const Wt::WDateTime& dateTime);
namespace details
{
template<typename Query>
void recordQueryPlanIfNeeded(const Query& query)
{
if (IQueryPlanRecorder * recorder{ core::Service<IQueryPlanRecorder>::get() })
static_cast<QueryPlanRecorder*>(recorder)->recordQueryPlanIfNeeded(query.session(), query.asString());
}
} // namespace details
template<typename Query> template<typename Query>
void applyRange(Query& query, std::optional<Range> range) void applyRange(Query& query, std::optional<Range> range)
{ {
@@ -82,13 +99,18 @@ namespace lms::db::utils
template<typename Query, typename UnaryFunc> template<typename Query, typename UnaryFunc>
void forEachQueryResult(const Query& query, UnaryFunc&& func) void forEachQueryResult(const Query& query, UnaryFunc&& func)
{ {
details::recordQueryPlanIfNeeded(query);
LMS_SCOPED_TRACE_DETAILED_WITH_ARG("Database", "ForEachQueryResult", "Query", query.asString()); LMS_SCOPED_TRACE_DETAILED_WITH_ARG("Database", "ForEachQueryResult", "Query", query.asString());
forEachResult(query.resultList(), std::forward<UnaryFunc>(func)); forEachResult(query.resultList(), std::forward<UnaryFunc>(func));
} }
template<typename T, typename Query> template<typename T, typename Query>
std::vector<T> fetchQueryResults(const Query& query) std::vector<T> fetchQueryResults(const Query& query)
{ {
details::recordQueryPlanIfNeeded(query);
LMS_SCOPED_TRACE_DETAILED_WITH_ARG("Database", "FetchQueryResults", "Query", query.asString()); LMS_SCOPED_TRACE_DETAILED_WITH_ARG("Database", "FetchQueryResults", "Query", query.asString());
auto collection{ query.resultList() }; auto collection{ query.resultList() };
@@ -98,6 +120,8 @@ namespace lms::db::utils
template<typename Query> template<typename Query>
std::vector<typename QueryResultType<Query>::type> fetchQueryResults(const Query& query) std::vector<typename QueryResultType<Query>::type> fetchQueryResults(const Query& query)
{ {
details::recordQueryPlanIfNeeded(query);
LMS_SCOPED_TRACE_DETAILED_WITH_ARG("Database", "FetchQueryResults", "Query", query.asString()); LMS_SCOPED_TRACE_DETAILED_WITH_ARG("Database", "FetchQueryResults", "Query", query.asString());
auto collection{ query.resultList() }; auto collection{ query.resultList() };
@@ -107,6 +131,8 @@ namespace lms::db::utils
template<typename Query> template<typename Query>
auto fetchQuerySingleResult(const Query& query) auto fetchQuerySingleResult(const Query& query)
{ {
details::recordQueryPlanIfNeeded(query);
LMS_SCOPED_TRACE_DETAILED_WITH_ARG("Database", "FetchQuerySingleResult", "Query", query.asString()); LMS_SCOPED_TRACE_DETAILED_WITH_ARG("Database", "FetchQuerySingleResult", "Query", query.asString());
return query.resultValue(); return query.resultValue();
} }
@@ -183,6 +209,4 @@ namespace lms::db::utils
call.run(); call.run();
} }
} }
Wt::WDateTime normalizeDateTime(const Wt::WDateTime& dateTime);
} // namespace lms::db::utils } // namespace lms::db::utils
src/libs/database/impl/objects/Artwork.cpp
+1
View File
@@ -18,6 +18,7 @@
*/ */
#include "database/objects/Artwork.hpp" #include "database/objects/Artwork.hpp"
#include <Wt/Dbo/WtSqlTraits.h> #include <Wt/Dbo/WtSqlTraits.h>
#include "database/Session.hpp" #include "database/Session.hpp"
src/libs/database/include/database/IQueryPlanRecorder.hpp
+39
View File
@@ -0,0 +1,39 @@
/*
* Copyright (C) 2025 Emeric Poupon
*
* This file is part of LMS.
*
* LMS 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 3 of the License, or
* (at your option) any later version.
*
* LMS 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 LMS. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <functional>
#include <memory>
namespace lms::db
{
// Due to technical limitations, query plans are recorded globally across all databases.
// As a result, this class is implemented as a singleton rather than being owned per DB instance.
class IQueryPlanRecorder
{
public:
virtual ~IQueryPlanRecorder() = default;
using QueryPlanVisitor = std::function<void(std::string_view query, std::string_view plan)>;
virtual void visitQueryPlans(const QueryPlanVisitor& visitor) const = 0;
};
std::unique_ptr<IQueryPlanRecorder> createQueryPlanRecorder();
} // namespace lms::db
src/lms/CMakeLists.txt
+3 -1
View File
@@ -14,10 +14,12 @@ add_executable(lms
ui/State.cpp ui/State.cpp
ui/Tooltip.cpp ui/Tooltip.cpp
ui/Utils.cpp ui/Utils.cpp
ui/admin/debug/Database.cpp
ui/admin/debug/Tracing.cpp
ui/admin/DebugToolsView.cpp
ui/admin/InitWizardView.cpp ui/admin/InitWizardView.cpp
ui/admin/MediaLibrariesView.cpp ui/admin/MediaLibrariesView.cpp
ui/admin/MediaLibraryModal.cpp ui/admin/MediaLibraryModal.cpp
ui/admin/TracingView.cpp
ui/admin/ScannerController.cpp ui/admin/ScannerController.cpp
ui/admin/ScannerReportResource.cpp ui/admin/ScannerReportResource.cpp
ui/admin/ScanSettingsView.cpp ui/admin/ScanSettingsView.cpp
src/lms/main.cpp
+5
View File
@@ -33,6 +33,7 @@
#include "core/SystemPaths.hpp" #include "core/SystemPaths.hpp"
#include "core/WtLogger.hpp" #include "core/WtLogger.hpp"
#include "database/IDb.hpp" #include "database/IDb.hpp"
#include "database/IQueryPlanRecorder.hpp"
#include "database/Session.hpp" #include "database/Session.hpp"
#include "image/Image.hpp" #include "image/Image.hpp"
#include "services/artwork/IArtworkService.hpp" #include "services/artwork/IArtworkService.hpp"
@@ -315,6 +316,10 @@ namespace lms
core::IOContextRunner ioContextRunner{ ioContext, getThreadCount(), "Misc" }; core::IOContextRunner ioContextRunner{ ioContext, getThreadCount(), "Misc" };
core::Service<db::IQueryPlanRecorder> queryPlanRecorder;
if (config->getBool("db-record-query-plans", false))
queryPlanRecorder.assign(db::createQueryPlanRecorder());
// Connection pool size must be twice the number of threads: we have at least 2 io pools with getThreadCount() each and they all may access the database // Connection pool size must be twice the number of threads: we have at least 2 io pools with getThreadCount() each and they all may access the database
auto database{ db::createDb(config->getPath("working-dir", "/var/lms") / "lms.db", getThreadCount() * 2) }; auto database{ db::createDb(config->getPath("working-dir", "/var/lms") / "lms.db", getThreadCount() * 2) };
{ {
src/lms/ui/LmsApplication.cpp
+14 -9
View File
@@ -30,6 +30,7 @@
#include "core/ITraceLogger.hpp" #include "core/ITraceLogger.hpp"
#include "core/Service.hpp" #include "core/Service.hpp"
#include "database/IDb.hpp" #include "database/IDb.hpp"
#include "database/IQueryPlanRecorder.hpp"
#include "database/Session.hpp" #include "database/Session.hpp"
#include "database/objects/Artist.hpp" #include "database/objects/Artist.hpp"
#include "database/objects/Cluster.hpp" #include "database/objects/Cluster.hpp"
@@ -51,11 +52,11 @@
#include "NotificationContainer.hpp" #include "NotificationContainer.hpp"
#include "PlayQueue.hpp" #include "PlayQueue.hpp"
#include "SettingsView.hpp" #include "SettingsView.hpp"
#include "admin/DebugToolsView.hpp"
#include "admin/InitWizardView.hpp" #include "admin/InitWizardView.hpp"
#include "admin/MediaLibrariesView.hpp" #include "admin/MediaLibrariesView.hpp"
#include "admin/ScanSettingsView.hpp" #include "admin/ScanSettingsView.hpp"
#include "admin/ScannerController.hpp" #include "admin/ScannerController.hpp"
#include "admin/TracingView.hpp"
#include "admin/UserView.hpp" #include "admin/UserView.hpp"
#include "admin/UsersView.hpp" #include "admin/UsersView.hpp"
#include "common/Template.hpp" #include "common/Template.hpp"
@@ -75,6 +76,8 @@ namespace lms::ui
const std::string appRoot{ Wt::WApplication::appRoot() }; const std::string appRoot{ Wt::WApplication::appRoot() };
auto res{ std::make_shared<Wt::WMessageResourceBundle>() }; auto res{ std::make_shared<Wt::WMessageResourceBundle>() };
res->use(appRoot + "admin-db");
res->use(appRoot + "admin-debugtools");
res->use(appRoot + "admin-initwizard"); res->use(appRoot + "admin-initwizard");
res->use(appRoot + "admin-medialibraries"); res->use(appRoot + "admin-medialibraries");
res->use(appRoot + "admin-medialibrary"); res->use(appRoot + "admin-medialibrary");
@@ -132,7 +135,7 @@ namespace lms::ui
IdxAdminScanner, IdxAdminScanner,
IdxAdminUsers, IdxAdminUsers,
IdxAdminUser, IdxAdminUser,
IdxAdminTracing, IdxAdminDebugTools,
}; };
void handlePathChange(Wt::WStackedWidget& stack, bool isAdmin) void handlePathChange(Wt::WStackedWidget& stack, bool isAdmin)
@@ -158,7 +161,7 @@ namespace lms::ui
{ "/admin/scanner", IdxAdminScanner, true, Wt::WString::tr("Lms.Admin.ScannerController.scanner") }, { "/admin/scanner", IdxAdminScanner, true, Wt::WString::tr("Lms.Admin.ScannerController.scanner") },
{ "/admin/users", IdxAdminUsers, true, Wt::WString::tr("Lms.Admin.Users.users") }, { "/admin/users", IdxAdminUsers, true, Wt::WString::tr("Lms.Admin.Users.users") },
{ "/admin/user", IdxAdminUser, true, std::nullopt }, { "/admin/user", IdxAdminUser, true, std::nullopt },
{ "/admin/tracing", IdxAdminTracing, true, Wt::WString::tr("Lms.Admin.Tracing.tracing") }, { "/admin/debug-tools", IdxAdminDebugTools, true, Wt::WString::tr("Lms.Admin.DebugTools.debug-tools") },
}; };
LMS_LOG(UI, DEBUG, "Internal path changed to '" << wApp->internalPath() << "'"); LMS_LOG(UI, DEBUG, "Internal path changed to '" << wApp->internalPath() << "'");
@@ -461,11 +464,13 @@ namespace lms::ui
navbar->bindNew<Wt::WAnchor>("scan-settings", Wt::WLink{ Wt::LinkType::InternalPath, "/admin/scan-settings" }, Wt::WString::tr("Lms.Admin.menu-scan-settings")); navbar->bindNew<Wt::WAnchor>("scan-settings", Wt::WLink{ Wt::LinkType::InternalPath, "/admin/scan-settings" }, Wt::WString::tr("Lms.Admin.menu-scan-settings"));
navbar->bindNew<Wt::WAnchor>("scanner", Wt::WLink{ Wt::LinkType::InternalPath, "/admin/scanner" }, Wt::WString::tr("Lms.Admin.menu-scanner")); navbar->bindNew<Wt::WAnchor>("scanner", Wt::WLink{ Wt::LinkType::InternalPath, "/admin/scanner" }, Wt::WString::tr("Lms.Admin.menu-scanner"));
navbar->bindNew<Wt::WAnchor>("users", Wt::WLink{ Wt::LinkType::InternalPath, "/admin/users" }, Wt::WString::tr("Lms.Admin.menu-users")); navbar->bindNew<Wt::WAnchor>("users", Wt::WLink{ Wt::LinkType::InternalPath, "/admin/users" }, Wt::WString::tr("Lms.Admin.menu-users"));
// Hide the entry if the trace logger is not enabled // Hide the entry if no debug service is enabled
if (core::Service<core::tracing::ITraceLogger>::get()) if (core::Service<core::tracing::ITraceLogger>::get()
navbar->bindNew<Wt::WAnchor>("tracing", Wt::WLink{ Wt::LinkType::InternalPath, "/admin/tracing" }, Wt::WString::tr("Lms.Admin.menu-tracing")); || core::Service<db::IQueryPlanRecorder>::get())
else {
navbar->bindEmpty("tracing"); navbar->setCondition("if-debug-tools", true);
navbar->bindNew<Wt::WAnchor>("debug-tools", Wt::WLink{ Wt::LinkType::InternalPath, "/admin/debug-tools" }, Wt::WString::tr("Lms.Admin.menu-debug-tools"));
}
} }
// Contents // Contents
@@ -486,7 +491,7 @@ namespace lms::ui
mainStack->addNew<ScannerController>(); mainStack->addNew<ScannerController>();
mainStack->addNew<UsersView>(); mainStack->addNew<UsersView>();
mainStack->addNew<UserView>(); mainStack->addNew<UserView>();
mainStack->addNew<TracingView>(); mainStack->addNew<DebugToolsView>();
} }
explore->getPlayQueueController().setMaxTrackCountToEnqueue(_playQueue->getCapacity()); explore->getPlayQueueController().setMaxTrackCountToEnqueue(_playQueue->getCapacity());
src/lms/ui/admin/DebugToolsView.cpp
+36
View File
@@ -0,0 +1,36 @@
/*
* Copyright (C) 2024 Emeric Poupon
*
* This file is part of LMS.
*
* LMS 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 3 of the License, or
* (at your option) any later version.
*
* LMS 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 LMS. If not, see <http://www.gnu.org/licenses/>.
*/
#include "DebugToolsView.hpp"
#include "admin/debug/Database.hpp"
#include "debug/Database.hpp"
#include "debug/Tracing.hpp"
namespace lms::ui
{
DebugToolsView::DebugToolsView()
: Wt::WTemplate{ Wt::WString::tr("Lms.Admin.DebugTools.template") }
{
addFunction("tr", &Wt::WTemplate::Functions::tr);
bindNew<Tracing>("tracing");
bindNew<Database>("db");
}
} // namespace lms::ui
src/lms/ui/admin/DebugToolsView.hpp
+31
View File
@@ -0,0 +1,31 @@
/*
* Copyright (C) 2024 Emeric Poupon
*
* This file is part of LMS.
*
* LMS 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 3 of the License, or
* (at your option) any later version.
*
* LMS 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 LMS. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <Wt/WTemplate.h>
namespace lms::ui
{
class DebugToolsView : public Wt::WTemplate
{
public:
DebugToolsView();
};
} // namespace lms::ui
src/lms/ui/admin/debug/Database.cpp
+91
View File
@@ -0,0 +1,91 @@
/*
* Copyright (C) 2024 Emeric Poupon
*
* This file is part of LMS.
*
* LMS 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 3 of the License, or
* (at your option) any later version.
*
* LMS 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 LMS. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Database.hpp"
#include <Wt/Http/Response.h>
#include <Wt/Utils.h>
#include <Wt/WDateTime.h>
#include <Wt/WPushButton.h>
#include <Wt/WResource.h>
#include "core/ITraceLogger.hpp"
#include "core/String.hpp"
#include "database/IQueryPlanRecorder.hpp"
namespace lms::ui
{
namespace
{
class QueryPlansReportResource : public Wt::WResource
{
public:
QueryPlansReportResource(const db::IQueryPlanRecorder& recorder)
: _recorder{ recorder }
{
}
~QueryPlansReportResource()
{
beingDeleted();
}
QueryPlansReportResource(const QueryPlansReportResource&) = delete;
QueryPlansReportResource& operator=(const QueryPlansReportResource&) = delete;
private:
void handleRequest(const Wt::Http::Request&, Wt::Http::Response& response)
{
response.setMimeType("application/text");
auto encodeHttpHeaderField = [](const std::string& fieldName, const std::string& fieldValue) {
// This implements RFC 5987
return fieldName + "*=UTF-8''" + Wt::Utils::urlEncode(fieldValue);
};
const std::string cdp{ encodeHttpHeaderField("filename", "LMS_db_query_plans_" + core::stringUtils::toISO8601String(Wt::WDateTime::currentDateTime()) + ".txt") };
response.addHeader("Content-Disposition", "attachment; " + cdp);
_recorder.visitQueryPlans([&](std::string_view query, std::string_view plan) {
response.out() << query << '\n';
response.out() << plan << "\n-------------------------\n";
});
}
const db::IQueryPlanRecorder& _recorder;
};
} // namespace
Database::Database()
: Wt::WTemplate{ Wt::WString::tr("Lms.Admin.DebugTools.Db.template") }
{
addFunction("tr", &Wt::WTemplate::Functions::tr);
Wt::WPushButton* dumpBtn{ bindNew<Wt::WPushButton>("export-query-plans-btn", Wt::WString::tr("Lms.Admin.DebugTools.Db.export-query-plans")) };
if (const auto* recorder{ core::Service<db::IQueryPlanRecorder>::get() })
{
Wt::WLink link{ std::make_shared<QueryPlansReportResource>(*recorder) };
link.setTarget(Wt::LinkTarget::NewWindow);
dumpBtn->setLink(link);
}
else
dumpBtn->setEnabled(false);
}
} // namespace lms::ui
src/lms/ui/admin/TracingView.hpp → src/lms/ui/admin/debug/Database.hpp
+2 -2
View File
@@ -23,9 +23,9 @@
namespace lms::ui namespace lms::ui
{ {
class TracingView : public Wt::WTemplate class Database : public Wt::WTemplate
{ {
public: public:
TracingView(); Database();
}; };
} // namespace lms::ui } // namespace lms::ui
src/lms/ui/admin/TracingView.cpp → src/lms/ui/admin/debug/Tracing.cpp
+5 -4
View File
@@ -17,7 +17,7 @@
* along with LMS. If not, see <http://www.gnu.org/licenses/>. * along with LMS. If not, see <http://www.gnu.org/licenses/>.
*/ */
#include "TracingView.hpp" #include "Tracing.hpp"
#include <Wt/Http/Response.h> #include <Wt/Http/Response.h>
#include <Wt/Utils.h> #include <Wt/Utils.h>
@@ -73,12 +73,12 @@ namespace lms::ui
}; };
} // namespace } // namespace
TracingView::TracingView() Tracing::Tracing()
: Wt::WTemplate{ Wt::WString::tr("Lms.Admin.Tracing.template") } : Wt::WTemplate{ Wt::WString::tr("Lms.Admin.DebugTools.Tracing.template") }
{ {
addFunction("tr", &Wt::WTemplate::Functions::tr); addFunction("tr", &Wt::WTemplate::Functions::tr);
Wt::WPushButton* dumpBtn{ bindNew<Wt::WPushButton>("export-btn", Wt::WString::tr("Lms.Admin.Tracing.export-current-buffer")) }; Wt::WPushButton* dumpBtn{ bindNew<Wt::WPushButton>("export-btn", Wt::WString::tr("Lms.Admin.DebugTools.Tracing.export-current-buffer")) };
if (auto traceLogger{ core::Service<core::tracing::ITraceLogger>::get() }) if (auto traceLogger{ core::Service<core::tracing::ITraceLogger>::get() })
{ {
@@ -89,4 +89,5 @@ namespace lms::ui
else else
dumpBtn->setEnabled(false); dumpBtn->setEnabled(false);
} }
} // namespace lms::ui } // namespace lms::ui
src/lms/ui/admin/debug/Tracing.hpp
+31
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@@ -0,0 +1,31 @@
/*
* Copyright (C) 2024 Emeric Poupon
*
* This file is part of LMS.
*
* LMS 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 3 of the License, or
* (at your option) any later version.
*
* LMS 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 LMS. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <Wt/WTemplate.h>
namespace lms::ui
{
class Tracing : public Wt::WTemplate
{
public:
Tracing();
};
} // namespace lms::ui