Option to disable explorer database saving

src/main/java/com/gamingmesh/jobs/Jobs.java

@@ -586,6 +586,7 @@ public final class Jobs extends JavaPlugin {
             getPlayerManager().clearMaps();
             getPlayerManager().clearCache();
 
+            if (Jobs.getGeneralConfigManager().ExploreSaveIntoDatabase)
                 dao.saveExplore();
 //    Do we really need to convert Block protection?
 //    Jobs.getJobsDAO().saveBlockProtection();
@@ -890,9 +891,8 @@ public final class Jobs extends JavaPlugin {
         CMIMessages.consoleMessage(prefix);
         HandlerList.unregisterAll(this);
 
-        if (dao != null) {
+        if (dao != null && Jobs.getGeneralConfigManager().ExploreSaveIntoDatabase)
             dao.saveExplore();
-        }
 
         blockOwnerShipsMaterial.values().forEach(BlockOwnerShip::save);
         ToggleBarHandling.save();

src/main/java/com/gamingmesh/jobs/config/ExploreManager.java

@@ -39,21 +39,21 @@ public class ExploreManager {
     }
 
     public void setExploreEnabled() {
-	if (!exploreEnabled) {
         exploreEnabled = true;
     }
-    }
 
     public void load() {
         if (!exploreEnabled)
             return;
 
+        if (Jobs.getGeneralConfigManager().ExploreSaveIntoDatabase) {
             CMIMessages.consoleMessage("&eLoading explorer data");
             Long time = System.currentTimeMillis();
             Jobs.getJobsDAO().loadExplore();
             int size = getSize();
             CMIMessages.consoleMessage("&eLoaded explorer data" + (size != 0 ? " (&6" + size + "&e)" : " ") + " in " + (System.currentTimeMillis() - time) + " ms");
         }
+    }
 
     public Map<String, Map<String, ExploreRegion>> getWorlds() {
         return worlds;

src/main/java/com/gamingmesh/jobs/config/GeneralConfigManager.java

@@ -107,7 +107,7 @@ public class GeneralConfigManager {
         DisableJoiningJobThroughGui, FireworkLevelupUse, UseRandom, UsePerPermissionForLeaving,
         EnableConfirmation, jobsInfoOpensBrowse, MonsterDamageUse, useMaxPaymentCurve, blockOwnershipTakeOver,
         hideJobsInfoWithoutPermission, UseTaxes, TransferToServerAccount, TakeFromPlayersPayment, AutoJobJoinUse, AllowDelevel, RomanNumbers,
-        BossBarEnabled = false, BossBarShowOnEachAction = false, BossBarsMessageByDefault = false, ExploreCompact, DBCleaningJobsUse, DBCleaningUsersUse,
+        BossBarEnabled = false, BossBarShowOnEachAction = false, BossBarsMessageByDefault = false, ExploreCompact, ExploreSaveIntoDatabase = false, DBCleaningJobsUse, DBCleaningUsersUse,
         DisabledWorldsUse, UseAsWhiteListWorldList, MythicMobsEnabled,
         LoggingUse, payForCombiningItems, BlastFurnacesReassign = false, SmokerReassign = false, payForStackedEntities, payForAbove = false,
         payForEachVTradeItem, allowEnchantingBoostedItems, bossBarAsync = false, preventShopItemEnchanting;
@@ -427,6 +427,11 @@ public class GeneralConfigManager {
             "By setting this to true when there is max amount of players explored a chunk then it will be marked as fully explored and exact players who explored it will not be saved to save some memory");
         ExploreCompact = c.get("Optimizations.Explore.Compact", true);
 
+        c.addComment("Optimizations.Explore.SaveIntoDatabase",
+            "While enabled explored chunk data will be saved into database and will persist over server restarts",
+            "While disabled expored chunk data resets on every server startup which will freeup memory and speedup server startups and stop in some cases");
+        ExploreSaveIntoDatabase = c.get("Optimizations.Explore.SaveIntoDatabase", false);
+
         c.addComment("Logging.Use", "With this set to true all players jobs actions will be logged to database for easy to see statistics",
             "This is still in development and in future it will expand");
         LoggingUse = c.get("Logging.Use", false);

src/main/java/com/gamingmesh/jobs/dao/JobsDAO.java

@@ -2558,6 +2558,8 @@ public abstract class JobsDAO {
         PreparedStatement prest2 = null;
         try {
 
+            CMIMessages.consoleMessage("&e[Jobs] Preparing explorer data save.");
+
             prest2 = conn.prepareStatement("INSERT INTO `" + DBTables.ExploreDataTable.getTableName() + "` (`" + ExploreDataTableFields.worldid.getCollumn()
                 + "`, `" + ExploreDataTableFields.chunkX.getCollumn()
                 + "`, `" + ExploreDataTableFields.chunkZ.getCollumn()
@@ -2570,11 +2572,13 @@ public abstract class JobsDAO {
             Map<String, Map<String, ExploreRegion>> temp = new HashMap<>(Jobs.getExploreManager().getWorlds());
 
             for (Entry<String, Map<String, ExploreRegion>> worlds : temp.entrySet()) {
-                for (Entry<String, ExploreRegion> region : worlds.getValue().entrySet()) {
                 JobsWorld jobsWorld = Util.getJobsWorld(worlds.getKey());
 
                 int id = jobsWorld == null ? 0 : jobsWorld.getId();
-                    if (id != 0)
+                if (id == 0)
+                    continue;
+                
+                for (Entry<String, ExploreRegion> region : worlds.getValue().entrySet()) {
                     for (Entry<Short, ExploreChunk> oneChunk : region.getValue().getChunks().entrySet()) {
                         ExploreChunk chunk = oneChunk.getValue();
                         if (chunk.getDbId() != -1)