feat(Core/Metrics): implement real time statistic visualization (#8663)

src/server/worldserver/Main.cpp

@@ -37,6 +37,7 @@
 #include "GitRevision.h"
 #include "IoContext.h"
 #include "MapMgr.h"
+#include "Metric.h"
 #include "MySQLThreading.h"
 #include "ObjectAccessor.h"
 #include "OpenSSLCrypto.h"
@@ -288,6 +289,22 @@ int main(int argc, char** argv)
 
     LoadRealmInfo(*ioContext);
 
+    sMetric->Initialize(realm.Name, *ioContext, []()
+    {
+        METRIC_VALUE("online_players", sWorld->GetPlayerCount());
+        METRIC_VALUE("db_queue_login", uint64(LoginDatabase.QueueSize()));
+        METRIC_VALUE("db_queue_character", uint64(CharacterDatabase.QueueSize()));
+        METRIC_VALUE("db_queue_world", uint64(WorldDatabase.QueueSize()));
+    });
+
+    METRIC_EVENT("events", "Worldserver started", "");
+
+    std::shared_ptr<void> sMetricHandle(nullptr, [](void*)
+    {
+        METRIC_EVENT("events", "Worldserver shutdown", "");
+        sMetric->Unload();
+    });
+
     // Loading modules configs
     sConfigMgr->PrintLoadedModulesConfigs();
 

src/server/worldserver/worldserver.conf.dist

@@ -31,6 +31,7 @@
 #    LOGGING SYSTEM SETTINGS
 #    PACKET SPOOF PROTECTION SETTINGS
 #    DEBUG
+#    METRIC SETTINGS
 #
 ###################################################################################################
 
@@ -3821,3 +3822,58 @@ Debug.Arena = 0
 
 #
 ###################################################################################################
+
+###################################################################################################
+# METRIC SETTINGS
+#
+# These settings control the statistics sent to the metric database (currently InfluxDB)
+#
+#    Metric.Enable
+#        Description: Enables statistics sent to the metric database.
+#        Default:     0 - (Disabled)
+#                     1 - (Enabled)
+#
+
+Metric.Enable = 0
+
+#
+#    Metric.Interval
+#        Description: Interval between every batch of data sent in seconds
+#        Default:     10 seconds
+#
+
+Metric.Interval = 10
+
+#
+#    Metric.ConnectionInfo
+#        Description: Connection settings for metric database (currently InfluxDB).
+#        Example:     "hostname;port;database"
+#        Default:     "127.0.0.1;8086;worldserver"
+#
+
+Metric.ConnectionInfo = "127.0.0.1;8086;worldserver"
+
+#
+#    Metric.OverallStatusInterval
+#        Description: Interval between every gathering of overall worldserver status data in seconds
+#        Default:     1 second
+#
+
+Metric.OverallStatusInterval = 1
+
+#
+#  Metric threshold values: Given a metric "name"
+#    Metric.Threshold.name
+#        Description: Skips sending statistics with a value lower than the config value.
+#                     If the threshold is commented out, the metric will be ignored.
+#                     Only metrics logged with METRIC_DETAILED_TIMER in the sources are affected.
+#                     Disabled by default. Requires WITH_DETAILED_METRICS CMake flag.
+#
+#        Format:      Value as integer
+#
+
+#Metric.Threshold.world_update_sessions_time = 100
+#Metric.Threshold.worldsession_update_opcode_time = 50
+
+#
+###################################################################################################