Mine optimization

src/engine/workthreads/MineThread.java

@@ -23,43 +23,45 @@ public class MineThread  implements Runnable {
     @Override
     public void run() {
         LocalDateTime nextPulse = LocalDateTime.now().withMinute(0).withSecond(0).withNano(0);
-        while (true){
-            if(LocalDateTime.now().isAfter(nextPulse)) {
-                for (Mine mine : Mine.getMines()) {
+        while (true) {
+            LocalDateTime now = LocalDateTime.now();
 
-                    if(nextPulse.getHour() == 2 && nextPulse.getMinute() == 0){
+            if (now.isAfter(nextPulse)) {
+                for (Mine mine : Mine.getMines()) {
+                    // Reset mine at 4:00 AM
+                    if (nextPulse.getHour() == 4 && nextPulse.getMinute() == 0) {
                         mine.wasClaimed = false;
                         mine.hasProduced = false;
-
                     }
-                    Building mineTower = BuildingManager.getBuilding(mine.getBuildingID());
 
-                    if (mineTower == null)
+                    Building mineTower = BuildingManager.getBuilding(mine.getBuildingID());
+                    if (mineTower == null) {
                         continue;
+                    }
 
-                    int minute = 0;
-                    if (mine.firstThirty == false)
-                        minute = 30;
-
-                    LocalDateTime openTime = LocalDateTime.now().withHour(mine.liveTime).withMinute(minute).withSecond(0);
+                    int minute = mine.firstThirty ? 0 : 30;
+                    LocalDateTime openTime = now.withHour(mine.liveTime).withMinute(minute).withSecond(0).withNano(0);
                     LocalDateTime closeTime = openTime.plusMinutes(29);
 
-                    //current time is after start time and before close time, open mine window
-                    if (LocalDateTime.now().isAfter(openTime.minusMinutes(1)) && !mine.wasClaimed && !mine.wasOpened) {
+                    if (!mine.wasClaimed && !mine.wasOpened && now.isAfter(openTime.minusMinutes(1))) {
                         mineWindowOpen(mine);
                         continue;
                     }
-                    if (mine.isActive) {
-
-                        if (LocalDateTime.now().isAfter(closeTime) && mineTower.getRank() > 0)
-                            mineWindowClose(mine); //mine was never knocked down, close window
 
-                        if (LocalDateTime.now().isAfter(closeTime) && mineTower.getRank() < 1 && mine.lastClaimer != null)
-                            mineWindowClose(mine); //mine was knocked down and was claimed, close window
+                    if (mine.isActive && now.isAfter(closeTime)) {
+                        if (mineTower.getRank() > 0 || (mineTower.getRank() < 1 && mine.lastClaimer != null)) {
+                            mineWindowClose(mine);
+                        }
                     }
                 }
                 nextPulse = nextPulse.plusMinutes(30);
             }
+
+            try {
+                Thread.sleep(1000);  // Avoid busy-waiting
+            } catch (InterruptedException e) {
+                Thread.currentThread().interrupt();
+            }
         }
     }