Add ability to disable spark metrics

src/main/java/ru/ruscalworld/fabricexporter/FabricExporter.java

@@ -30,12 +30,15 @@ public class FabricExporter implements ModInitializer {
 
         MetricUpdater metricUpdater = new MetricUpdater(this);
         metricUpdater.registerMetric(new OnlinePlayers());
-        metricUpdater.registerMetric(new TicksPerSecond());
-        metricUpdater.registerMetric(new MillisPerTick());
         metricUpdater.registerMetric(new Entities());
         metricUpdater.registerMetric(new LoadedChunks());
         metricUpdater.registerMetric(new TotalLoadedChunks());
 
+        if (this.getConfig().shouldUseSpark()) {
+            metricUpdater.registerMetric(new TicksPerSecond());
+            metricUpdater.registerMetric(new MillisPerTick());
+        }
+
         Timer timer = new Timer();
 
         ServerLifecycleEvents.SERVER_STARTING.register(this::setServer);

src/main/java/ru/ruscalworld/fabricexporter/config/MainConfig.java

@@ -7,6 +7,7 @@ import java.util.Properties;
 public class MainConfig extends Config {
     private int port;
     private int updateInterval;
+    private boolean useSpark;
 
     public MainConfig(String name) {
         super(name);
@@ -19,6 +20,8 @@ public class MainConfig extends Config {
 
         String updateIntervalString = properties.getProperty("update-interval", "1000");
         this.setUpdateInterval(ConvertUtil.intToStringOrDefault(updateIntervalString, 1000));
+
+        this.setShouldUseSpark(properties.getProperty("use-spark", "true").equalsIgnoreCase("true"));
     }
 
     public int getPort() {
@@ -36,4 +39,12 @@ public class MainConfig extends Config {
     public void setUpdateInterval(int updateInterval) {
         this.updateInterval = updateInterval;
     }
+
+    public boolean shouldUseSpark() {
+        return useSpark;
+    }
+
+    public void setShouldUseSpark(boolean useSpark) {
+        this.useSpark = useSpark;
+    }
 }

src/main/resources/config/exporter.properties

@@ -1,2 +1,3 @@
 server-port=25585
-update-interval=1000
+update-interval=1000
+use-spark=true