BauSystem_Main/src/de/steamwar/bausystem/features/tracer/Trace.java

@@ -237,6 +237,13 @@ public class Trace { // TODO: Add UUID for file saving and so on!
         entityServer.close();
     }
 
+    public void hide() {
+        entityServerMap.forEach((player, entityServer) -> {
+            entityServer.close();
+        });
+        entityServerMap.clear();
+    }
+
     @Override
     public String toString() {
         return "Trace{" +

BauSystem_Main/src/de/steamwar/bausystem/features/tracer/TraceCommand.java

@@ -139,7 +139,7 @@ public class TraceCommand extends SWCommand {
 
     @Register(value = "delete")
     public void delete(@Validator Player player, Trace trace) {
-        // TODO: Reimplement manager.remove(trace);
+        manager.remove(trace);
         BauSystem.MESSAGE.send("TRACE_MESSAGE_DELETE_SPECIFIC", player);
     }
 

BauSystem_Main/src/de/steamwar/bausystem/features/tracer/TraceManager.java

@@ -86,17 +86,18 @@ public class TraceManager implements Listener {
     /**
      * Removes the trace with the given id
      *
-     * @param id id of the trace to be removed
+     * @param trace the trace to be removed
      */
-    public boolean remove(int id) {
+    public boolean remove(Trace trace) {
-        if (id >= nextOpenId) return false;
+        Integer traceId = traces.entrySet().stream()
-        if (traces.get(id) == null) return false;
+                .filter(entry -> entry.getValue() == trace)
-        Trace trace = traces.remove(id);
+                .map(Map.Entry::getKey)
-        showDataPerRegionPerPlayer.get(trace.getRegion()).forEach((player, playerTraceShowData) -> {
+                .findFirst()
-            trace.hide(player);
+                .orElse(null);
-            followerMap.getOrDefault(player, Collections.emptySet()).forEach(trace::hide);
+        if (traceId == null) return false;
-        });
+        traces.remove(traceId);
-        tracesByRegion.get(trace.getRegion()).remove(id);
+        tracesByRegion.getOrDefault(trace.getRegion(), Collections.emptyMap()).remove(traceId);
+        trace.hide();
         return true;
     }