Fix merge + remove direct sql

SpigotCore_Main/src/de/steamwar/core/Core.java

@@ -25,7 +25,7 @@ import de.steamwar.core.events.ChattingEvent;
 import de.steamwar.core.events.ChunkListener;
 import de.steamwar.core.events.PlayerJoinedEvent;
 import de.steamwar.core.events.WorldLoadEvent;
-import de.steamwar.sql.SQL;
+import de.steamwar.sql.Statement;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.java.JavaPlugin;
 
@@ -85,7 +85,7 @@ public class Core extends JavaPlugin{
 	public void onDisable() {
 		ChunkListener.protocol.close();
 		errorHandler.unregister();
-		SQL.close();
+		Statement.close();
 	}
 
 	public static Core getInstance() {

SpigotCore_Main/src/de/steamwar/core/ErrorHandler.java

@@ -19,8 +19,8 @@
 
 package de.steamwar.core;
 
-import de.steamwar.sql.SQL;
 import de.steamwar.sql.SWException;
+import de.steamwar.sql.Statement;
 
 import java.io.ByteArrayOutputStream;
 import java.io.PrintStream;
@@ -83,7 +83,7 @@ public class ErrorHandler extends Handler {
         if(stacktrace.contains("POI data mismatch"))
             return;
 
-        if(!SQL.connectionStable())
+        if(!Statement.connectionStable())
             return;
 
         SWException.log(message, stacktrace);

SpigotCore_Main/src/de/steamwar/sql/BauweltMember.java

@@ -25,8 +25,8 @@ import java.util.UUID;
 
 public class BauweltMember{
 
-    private static final SQL.Statement getMember = new SQL.Statement("SELECT * FROM BauweltMember WHERE BauweltID = ? AND MemberID = ?");
+    private static final Statement getMember = new Statement("SELECT * FROM BauweltMember WHERE BauweltID = ? AND MemberID = ?");
-    private static final SQL.Statement getMembers = new SQL.Statement("SELECT * FROM BauweltMember WHERE BauweltID = ?");
+    private static final Statement getMembers = new Statement("SELECT * FROM BauweltMember WHERE BauweltID = ?");
 
     private final int bauweltID;
     private final int memberID;

SpigotCore_Main/src/de/steamwar/sql/CheckedSchematic.java

@@ -26,10 +26,8 @@ import java.util.UUID;
 
 public class CheckedSchematic {
 
-    private static final SQL.Statement checkHistory = new SQL.Statement("SELECT * FROM CheckedSchematic WHERE NodeId IN (SELECT NodeId FROM SchematicNode WHERE NodeOwner = ?) AND DeclineReason != '' AND DeclineReason != 'Prüfvorgang abgebrochen' AND NodeId is not NULL ORDER BY EndTime DESC");
+    private static final Statement checkHistory = new Statement("SELECT * FROM CheckedSchematic WHERE NodeId IN (SELECT NodeId FROM SchematicNode WHERE NodeOwner = ?) AND DeclineReason != '' AND DeclineReason != 'Prüfvorgang abgebrochen' AND NodeId is not NULL ORDER BY EndTime DESC");
-    private static final SQL.Statement nodeHistory = new SQL.Statement("SELECT * FROM CheckedSchematic WHERE NodeId = ? AND DeclineReason != '' AND DeclineReason != 'Prüfvorgang abgebrochen' ORDER BY EndTime DESC");
+    private static final Statement nodeHistory = new Statement("SELECT * FROM CheckedSchematic WHERE NodeId = ? AND DeclineReason != '' AND DeclineReason != 'Prüfvorgang abgebrochen' ORDER BY EndTime DESC");
-    private static final SQL.Statement insert = new SQL.Statement("INSERT INTO CheckedSchematic (NodeId, NodeName, NodeOwner, Validator, StartTime, EndTime, DeclineReason) VALUES (?, ?, ?, ?, ?, ?, ?)");
-    private static final SQL.Statement setNodeNull = new SQL.Statement("UPDATE CheckedSchematic SET NodeId = NULL WHERE NodeId = ?");
 
     private final Integer node;
     private final int validator;
@@ -57,7 +55,7 @@ public class CheckedSchematic {
                 Timestamp startTime = rs.getTimestamp("StartTime");
                 Timestamp endTime = rs.getTimestamp("EndTime");
                 String declineReason = rs.getString("DeclineReason");
-                lastDeclined.add(new CheckedSchematic(node, validator, startTime, endTime, declineReason, false));
+                lastDeclined.add(new CheckedSchematic(node, validator, startTime, endTime, declineReason));
             }
             return lastDeclined;
         }, node);

SpigotCore_Main/src/de/steamwar/sql/Elo.java

@@ -22,8 +22,8 @@ package de.steamwar.sql;
 public class Elo {
     private Elo(){}
 
-    private static final SQL.Statement get = new SQL.Statement("SELECT Elo FROM Elo WHERE UserID = ? AND GameMode = ?");
+    private static final Statement get = new Statement("SELECT Elo FROM Elo WHERE UserID = ? AND GameMode = ?");
-    private static final SQL.Statement set = new SQL.Statement("INSERT INTO Elo (UserID, GameMode, Elo) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE Elo = VALUES(Elo)");
+    private static final Statement set = new Statement("INSERT INTO Elo (UserID, GameMode, Elo) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE Elo = VALUES(Elo)");
 
     public static int getElo(int userId, String gameMode){
         return get.select(rs -> {

SpigotCore_Main/src/de/steamwar/sql/Event.java

@@ -25,7 +25,7 @@ import java.sql.Timestamp;
 
 public class Event {
 
-    private static final SQL.Statement get = new SQL.Statement("SELECT * FROM Event WHERE EventID = ?");
+    private static final Statement get = new Statement("SELECT * FROM Event WHERE EventID = ?");
 
     private final int eventID;
     private final String eventName;

SpigotCore_Main/src/de/steamwar/sql/EventFight.java

@@ -24,9 +24,9 @@ import java.sql.SQLException;
 
 public class EventFight {
 
-    private static final SQL.Statement get = new SQL.Statement("SELECT * FROM EventFight WHERE FightID = ?");
+    private static final Statement get = new Statement("SELECT * FROM EventFight WHERE FightID = ?");
-    private static final SQL.Statement setResult = new SQL.Statement("UPDATE EventFight SET Ergebnis = ? WHERE FightID = ?");
+    private static final Statement setResult = new Statement("UPDATE EventFight SET Ergebnis = ? WHERE FightID = ?");
-    private static final SQL.Statement setFight = new SQL.Statement("UPDATE EventFight SET Fight = ? WHERE FightID = ?");
+    private static final Statement setFight = new Statement("UPDATE EventFight SET Fight = ? WHERE FightID = ?");
 
     private final int eventID;
     private final int fightID;

SpigotCore_Main/src/de/steamwar/sql/Fight.java

@@ -26,10 +26,10 @@ import java.util.function.Consumer;
 public class Fight {
     private Fight(){}
 
-    private static final SQL.Statement create = new SQL.Statement("INSERT INTO Fight (GameMode, Server, Arena, StartTime, Duration, BlueLeader, RedLeader, BlueSchem, RedSchem, Win, WinCondition) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
+    private static final Statement create = new Statement("INSERT INTO Fight (GameMode, Server, Arena, StartTime, Duration, BlueLeader, RedLeader, BlueSchem, RedSchem, Win, WinCondition) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
-    private static final SQL.Statement lastId = new SQL.Statement("SELECT LAST_INSERT_ID() AS FightID");
+    private static final Statement lastId = new Statement("SELECT LAST_INSERT_ID() AS FightID");
-    private static final SQL.Statement getReplay = new SQL.Statement("SELECT Replay FROM Fight WHERE FightID = ?");
+    private static final Statement getReplay = new Statement("SELECT Replay FROM Fight WHERE FightID = ?");
-    private static final SQL.Statement setReplay = new SQL.Statement("UPDATE Fight SET Replay = ? WHERE FightID = ?");
+    private static final Statement setReplay = new Statement("UPDATE Fight SET Replay = ? WHERE FightID = ?");
 
     public static int create(String gamemode, String arena, Timestamp starttime, int duration, int blueleader, int redleader, Integer blueschem, Integer redschem, int win, String wincondition){
         return create(gamemode, arena, null, starttime, duration, blueleader, redleader, blueschem, redschem, win, wincondition);

SpigotCore_Main/src/de/steamwar/sql/FightPlayer.java

@@ -22,7 +22,7 @@ package de.steamwar.sql;
 public class FightPlayer {
     private FightPlayer(){}
 
-    private static final SQL.Statement create = new SQL.Statement("INSERT INTO FightPlayer (FightID, UserID, Team, Kit, Kills, IsOut) VALUES (?, ?, ?, ?, ?, ?)");
+    private static final Statement create = new Statement("INSERT INTO FightPlayer (FightID, UserID, Team, Kit, Kills, IsOut) VALUES (?, ?, ?, ?, ?, ?)");
 
     public static void create(int fightID, int userID, boolean blue, String kit, int kills, boolean isOut){
         create.update(fightID, userID, blue ? 1 : 2, kit, kills, isOut);

SpigotCore_Main/src/de/steamwar/sql/NodeDownload.java

@@ -27,7 +27,7 @@ import java.time.Instant;
 
 public class NodeDownload {
 
-    private static final SQL.Statement createLink = new SQL.Statement("INSERT INTO NodeDownload (NodeId, Link) VALUES (?, ?) ON DUPLICATE KEY UPDATE Link = VALUES(Link)");
+    private static final Statement createLink = new Statement("INSERT INTO NodeDownload (NodeId, Link) VALUES (?, ?) ON DUPLICATE KEY UPDATE Link = VALUES(Link)");
 
     private static final String BASE = "https://steamwar.de/download.php?schem=";
 

SpigotCore_Main/src/de/steamwar/sql/NodeMember.java

@@ -26,11 +26,11 @@ import java.util.Set;
 
 public class NodeMember {
 
-    private static final SQL.Statement getNodeMember = new SQL.Statement("SELECT * FROM NodeMember WHERE NodeId = ? AND UserId = ?");
+    private static final Statement getNodeMember = new Statement("SELECT * FROM NodeMember WHERE NodeId = ? AND UserId = ?");
-    private static final SQL.Statement getNodeMembers = new SQL.Statement("SELECT * FROM NodeMember WHERE NodeId = ?");
+    private static final Statement getNodeMembers = new Statement("SELECT * FROM NodeMember WHERE NodeId = ?");
-    private static final SQL.Statement getSchematics = new SQL.Statement("SELECT * FROM NodeMember WHERE UserId = ?");
+    private static final Statement getSchematics = new Statement("SELECT * FROM NodeMember WHERE UserId = ?");
-    private static final SQL.Statement createNodeMember = new SQL.Statement("INSERT INTO NodeMember (NodeId, UserId) VALUES (?, ?)");
+    private static final Statement createNodeMember = new Statement("INSERT INTO NodeMember (NodeId, UserId) VALUES (?, ?)");
-    private static final SQL.Statement deleteNodeMember = new SQL.Statement("DELETE FROM NodeMember WHERE NodeId = ? AND UserId = ?");
+    private static final Statement deleteNodeMember = new Statement("DELETE FROM NodeMember WHERE NodeId = ? AND UserId = ?");
 
     public static NodeMember getNodeMember(int node, int member) {
         return getNodeMember.select(rs -> {

SpigotCore_Main/src/de/steamwar/sql/PersonalKit.java

@@ -31,11 +31,11 @@ import java.util.Objects;
 
 public class PersonalKit {
 
-    private static final SQL.Statement getKits = new SQL.Statement("SELECT * FROM PersonalKit WHERE UserID = ? AND GameMode = ?");
+    private static final Statement getKits = new Statement("SELECT * FROM PersonalKit WHERE UserID = ? AND GameMode = ?");
-    private static final SQL.Statement getKit = new SQL.Statement("SELECT * FROM PersonalKit WHERE UserID = ? AND GameMode = ? AND Name = ?");
+    private static final Statement getKit = new Statement("SELECT * FROM PersonalKit WHERE UserID = ? AND GameMode = ? AND Name = ?");
-    private static final SQL.Statement getKitInUse = new SQL.Statement("SELECT * FROM PersonalKit WHERE UserID = ? AND GameMode = ? AND InUse = 1");
+    private static final Statement getKitInUse = new Statement("SELECT * FROM PersonalKit WHERE UserID = ? AND GameMode = ? AND InUse = 1");
-    private static final SQL.Statement delete = new SQL.Statement("DELETE FROM `PersonalKit` WHERE UserID = ? AND GameMode = ? AND Name = ?");
+    private static final Statement delete = new Statement("DELETE FROM `PersonalKit` WHERE UserID = ? AND GameMode = ? AND Name = ?");
-    private static final SQL.Statement update = new SQL.Statement("INSERT INTO PersonalKit (UserID, GameMode, Name, Inventory, Armor, InUse) VALUES (?, ?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE Inventory = VALUES(Inventory), Armor = VALUES(Armor), Name = VALUES(Name), InUse = VALUES(InUse)");
+    private static final Statement update = new Statement("INSERT INTO PersonalKit (UserID, GameMode, Name, Inventory, Armor, InUse) VALUES (?, ?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE Inventory = VALUES(Inventory), Armor = VALUES(Armor), Name = VALUES(Name), InUse = VALUES(InUse)");
 
     private final int userID;
     private String name;
@@ -74,8 +74,7 @@ public class PersonalKit {
         if(armor == null) {
             armor = new ItemStack[]{null, null, null, null};
         }
-        SQL.update("INSERT INTO PersonalKit (UserID, GameMode, Name, Inventory, Armor) VALUES (?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE Inventory = VALUES(Inventory), Armor = VALUES(Armor), Name = VALUES(name)",
+        update.update(userID, gamemode, name, saveInvConfig("Inventory", inventory), saveInvConfig("Armor", armor), true);
-                userID, gamemode, name, saveInvConfig("Inventory", inventory), saveInvConfig("Armor", armor));
         return get(userID, gamemode, name);
     }
 

SpigotCore_Main/src/de/steamwar/sql/SQL.java

@@ -1,201 +0,0 @@
-/* 
-    This file is a part of the SteamWar software.
-    
-    Copyright (C) 2020  SteamWar.de-Serverteam
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU Affero General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-    GNU Affero General Public License for more details.
-
-    You should have received a copy of the GNU Affero General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
-*/
-
-package de.steamwar.sql;
-
-import com.mysql.jdbc.exceptions.jdbc4.CommunicationsException;
-import de.steamwar.core.Core;
-import org.bukkit.configuration.file.YamlConfiguration;
-
-import java.io.File;
-import java.sql.*;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.logging.Level;
-
-
-public class SQL {
-	private SQL(){}
-
-	private static Connection con;
-	private static final String URL;
-	private static final String USER;
-	private static final String PASSWORD;
-
-	static {
-		File file = new File(Core.getInstance().getDataFolder(), "MySQL.yml");
-		YamlConfiguration config = YamlConfiguration.loadConfiguration(file);
-
-		if(!file.exists())
-			throw new SecurityException("SQL-ConfigFile not found!");
-
-		URL = "jdbc:mysql://" + config.getString("HOST") + ":" + config.getString("PORT") + "/" + config.getString("DATABASE");
-		USER = config.getString("USER");
-		PASSWORD = config.getString("PASSWORD");
-
-		connect();
-	}
-
-	private static void connect() {
-		try {
-			con = DriverManager.getConnection(URL + "?useServerPrepStmts=true", USER, PASSWORD);
-		} catch (SQLException e) {
-			throw new SecurityException("Could not start SQL connection", e);
-		}
-	}
-
-	public static void close() {
-		for (Statement statement : Statement.statements) {
-			try {
-				statement.st.close();
-			} catch (SQLException e) {
-				Core.getInstance().getLogger().log(Level.INFO, "Could not close statement", e);
-			}
-		}
-
-		try {
-			con.close();
-		} catch (SQLException e) {
-			Core.getInstance().getLogger().log(Level.INFO, "Could not close SQL connection", e);
-		}
-	}
-
-	private static void reset() {
-		close();
-		connect();
-
-		try {
-			for (Statement statement : Statement.statements) {
-				statement.init();
-			}
-		} catch (SQLException ex) {
-			throw new SecurityException("Could not reprepare SQL Statements", ex);
-		}
-	}
-
-	public static boolean connectionStable() {
-		try {
-			return !con.isClosed();
-		} catch (SQLException e) {
-			return false;
-		}
-	}
-
-	@Deprecated
-	static void update(String qry, Object... objects) {
-		try {
-			prepare(qry, objects).executeUpdate();
-		} catch (SQLException e) {
-			reset();
-			throw new SecurityException("Could not execute SQL statement", e);
-		}
-	}
-
-	@Deprecated
-	static ResultSet select(String qry, Object... objects) {
-		try {
-			return prepare(qry, objects).executeQuery();
-		} catch (SQLException e) {
-			reset();
-			throw new SecurityException("Could not execute SQL statement", e);
-		}
-	}
-
-	@Deprecated
-	static Blob blob() {
-		try {
-			return con.createBlob();
-		} catch (SQLException e) {
-			reset();
-			throw new SecurityException("Could not execute SQL statement", e);
-		}
-	}
-
-	@Deprecated
-	private static PreparedStatement prepare(String qry, Object... objects) throws SQLException {
-		PreparedStatement st = con.prepareStatement(qry);
-		for(int i = 0; i < objects.length; i++){
-			st.setObject(i+1, objects[i]);
-		}
-		return st;
-	}
-
-	public static class Statement {
-		private static final List<Statement> statements = new ArrayList<>();
-
-		private final String sql;
-		private PreparedStatement st;
-
-		Statement(String sql) {
-			this.sql = sql;
-			statements.add(this);
-			try {
-				init();
-			} catch (SQLException e) {
-				throw new SecurityException("Could not init statement", e);
-			}
-		}
-
-		private synchronized void init() throws SQLException {
-			st = con.prepareStatement(sql);
-		}
-
-		<T> T select(ResultSetUser<T> user, Object... objects) {
-			return prepare(() -> {
-				ResultSet rs = st.executeQuery();
-				T result = user.use(rs);
-				rs.close();
-				return result;
-			}, objects);
-		}
-
-		void update(Object... objects) {
-			prepare(st::executeUpdate, objects);
-		}
-
-		private synchronized <T> T prepare(SQLRunnable<T> runnable, Object... objects) {
-			try {
-				try {
-					setObjects(objects);
-					return runnable.run();
-				} catch (CommunicationsException e) {
-					reset();
-					setObjects(objects);
-					return runnable.run();
-				}
-			} catch (SQLException e) {
-				throw new SecurityException("Could not execute SQL statement", e);
-			}
-		}
-
-		private void setObjects(Object... objects) throws SQLException {
-			for (int i = 0; i < objects.length; i++) {
-				st.setObject(i + 1, objects[i]);
-			}
-		}
-
-		interface ResultSetUser<T> {
-			T use(ResultSet rs) throws SQLException;
-		}
-
-		private interface SQLRunnable<T> {
-			T run() throws SQLException;
-		}
-	}
-}

SpigotCore_Main/src/de/steamwar/sql/SWException.java

@@ -25,7 +25,7 @@ import org.bukkit.entity.Player;
 public class SWException {
     private SWException(){}
 
-    private static final SQL.Statement insert = new SQL.Statement("INSERT INTO Exception (server, message, stacktrace) VALUES (?, ?, ?)");
+    private static final Statement insert = new Statement("INSERT INTO Exception (server, message, stacktrace) VALUES (?, ?, ?)");
 
     public static void log(String message, String stacktrace){
         message += "\n";

SpigotCore_Main/src/de/steamwar/sql/Schematic.java

@@ -33,7 +33,7 @@ import java.util.UUID;
 @Deprecated
 public class Schematic {
 
-    private static final SQL.Statement getSchemsOfType = new SQL.Statement("SELECT DISTINCT s.SchemID, s.SchemName, s.SchemOwner, s.Item, s.SchemType, s.Rank, s.SchemFormat FROM Schematic s LEFT JOIN SchemMember sm ON sm.SchemName = s.SchemName AND sm.SchemOwner = s.SchemOwner WHERE s.SchemType = ? AND (s.SchemOwner = ? OR sm.Member = ?) ORDER BY s.SchemName");
+    private static final Statement getSchemsOfType = new Statement("SELECT DISTINCT s.SchemID, s.SchemName, s.SchemOwner, s.Item, s.SchemType, s.Rank, s.SchemFormat FROM Schematic s LEFT JOIN SchemMember sm ON sm.SchemName = s.SchemName AND sm.SchemOwner = s.SchemOwner WHERE s.SchemType = ? AND (s.SchemOwner = ? OR sm.Member = ?) ORDER BY s.SchemName");
 
     private final SchematicNode node;
 

SpigotCore_Main/src/de/steamwar/sql/SchematicNode.java

@@ -21,8 +21,6 @@ package de.steamwar.sql;
 
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
 import de.steamwar.core.Core;
-import de.steamwar.core.VersionedCallable;
-import de.steamwar.core.VersionedRunnable;
 import de.steamwar.core.WorldEditWrapper;
 import org.bukkit.entity.Player;
 
@@ -35,38 +33,37 @@ import java.sql.SQLException;
 import java.sql.Timestamp;
 import java.time.Instant;
 import java.util.*;
-import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.Predicate;
 import java.util.zip.GZIPInputStream;
 
 public class SchematicNode {
 
-    private static final SQL.Statement createNode = new SQL.Statement("INSERT INTO SchematicNode (NodeName, NodeOwner, ParentNode, NodeType, NodeItem) VALUES (?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE NodeName = VALUES(NodeName), ParentNode = VALUES(ParentNode), NodeItem = VALUES(NodeItem), NodeType = VALUES(NodeType), NodeItem = VALUES(NodeItem)");
+    private static final Statement createNode = new Statement("INSERT INTO SchematicNode (NodeName, NodeOwner, ParentNode, NodeType, NodeItem) VALUES (?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE NodeName = VALUES(NodeName), ParentNode = VALUES(ParentNode), NodeItem = VALUES(NodeItem), NodeType = VALUES(NodeType), NodeItem = VALUES(NodeItem)");
-    private static final SQL.Statement getSchematicNode_Null = new SQL.Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeOwner = ? AND NodeName = ? AND ParentNode is NULL");
+    private static final Statement getSchematicNode_Null = new Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeOwner = ? AND NodeName = ? AND ParentNode is NULL");
-    private static final SQL.Statement getSchematicNode = new SQL.Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeOwner = ? AND NodeName = ? AND ParentNode = ?");
+    private static final Statement getSchematicNode = new Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeOwner = ? AND NodeName = ? AND ParentNode = ?");
-    private static final SQL.Statement getSchematicsInNode_Null = new SQL.Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE ParentNode is NULL");
+    private static final Statement getSchematicsInNode_Null = new Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE ParentNode is NULL");
-    private static final SQL.Statement getSchematicsInNode = new SQL.Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE ParentNode = ?");
+    private static final Statement getSchematicsInNode = new Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE ParentNode = ?");
-    private static final SQL.Statement getDirsInNode_Null = new SQL.Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE ParentNode is NULL AND NodeType is NULL");
+    private static final Statement getDirsInNode_Null = new Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE ParentNode is NULL AND NodeType is NULL");
-    private static final SQL.Statement getDirsInNode = new SQL.Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE ParentNode = ? AND NodeType is NULL");
+    private static final Statement getDirsInNode = new Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE ParentNode = ? AND NodeType is NULL");
-    private static final SQL.Statement getSchematicDirectory_Null = new SQL.Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeName = ? AND ParentNode is NULL");
+    private static final Statement getSchematicDirectory_Null = new Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeName = ? AND ParentNode is NULL");
-    private static final SQL.Statement getSchematicDirectory = new SQL.Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeName = ? AND ParentNode = ?");
+    private static final Statement getSchematicDirectory = new Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeName = ? AND ParentNode = ?");
-    private static final SQL.Statement getSchematicNodeO_Null = new SQL.Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeName = ? AND ParentNode is NULL");
+    private static final Statement getSchematicNodeO_Null = new Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeName = ? AND ParentNode is NULL");
-    private static final SQL.Statement getSchematicNodeO = new SQL.Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeName = ? AND ParentNode = ?");
+    private static final Statement getSchematicNodeO = new Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeName = ? AND ParentNode = ?");
-    private static final SQL.Statement getSchematicNodeId = new SQL.Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeId = ?");
+    private static final Statement getSchematicNodeId = new Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeId = ?");
-    private static final SQL.Statement getAllSchemsOfTypeOwner = new SQL.Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeOwner = ? AND NodeType = ?");
+    private static final Statement getAllSchemsOfTypeOwner = new Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeOwner = ? AND NodeType = ?");
-    private static final SQL.Statement getAllSchemsOfType = new SQL.Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeType = ?");
+    private static final Statement getAllSchemsOfType = new Statement("SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeType = ?");
-    private static final SQL.Statement getAccessibleByUser = new SQL.Statement("SELECT s.NodeId, s.NodeName, s.NodeOwner, s.NodeItem, s.NodeType, s.ParentNode, s.NodeRank, s.NodeFormat, s.LastUpdate FROM SchematicNode s LEFT JOIN NodeMember n ON s.NodeId = n.NodeId WHERE (s.NodeOwner = ? OR n.UserId = ?) AND ((s.NodeOwner = ? AND s.ParentNode IS NULL) OR NOT s.NodeOwner = ?) GROUP BY s.NodeId ORDER BY s.NodeName");
+    private static final Statement getAccessibleByUser = new Statement("SELECT s.NodeId, s.NodeName, s.NodeOwner, s.NodeItem, s.NodeType, s.ParentNode, s.NodeRank, s.NodeFormat, s.LastUpdate FROM SchematicNode s LEFT JOIN NodeMember n ON s.NodeId = n.NodeId WHERE (s.NodeOwner = ? OR n.UserId = ?) AND ((s.NodeOwner = ? AND s.ParentNode IS NULL) OR NOT s.NodeOwner = ?) GROUP BY s.NodeId ORDER BY s.NodeName");
-    private static final SQL.Statement getAccessibleByUserByTypeInNode = new SQL.Statement("WITH RECURSIVE RSNB AS (WITH RECURSIVE RSN as (SELECT s.NodeId, s.NodeName, s.NodeOwner, s.NodeItem, s.NodeType, s.ParentNode, s.NodeRank, s.NodeFormat, s.LastUpdate FROM SchematicNode s LEFT JOIN NodeMember n ON s.NodeId = n.NodeId WHERE (s.NodeOwner = ? OR n.UserId = ?) GROUP BY s.NodeId union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.NodeItem, SN.NodeType, SN.ParentNode, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode AS SN, RSN WHERE SN.ParentNode = RSN.NodeId) SELECT * FROM RSN WHERE NodeType = ? union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.NodeItem, SN.NodeType, SN.ParentNode, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode AS SN, RSNB WHERE SN.NodeId = RSNB.ParentNode)SELECT * FROM RSNB WHERE ParentNode = ?");
+    private static final Statement getAccessibleByUserByTypeInNode = new Statement("WITH RECURSIVE RSNB AS (WITH RECURSIVE RSN as (SELECT s.NodeId, s.NodeName, s.NodeOwner, s.NodeItem, s.NodeType, s.ParentNode, s.NodeRank, s.NodeFormat, s.LastUpdate FROM SchematicNode s LEFT JOIN NodeMember n ON s.NodeId = n.NodeId WHERE (s.NodeOwner = ? OR n.UserId = ?) GROUP BY s.NodeId union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.NodeItem, SN.NodeType, SN.ParentNode, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode AS SN, RSN WHERE SN.ParentNode = RSN.NodeId) SELECT * FROM RSN WHERE NodeType = ? union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.NodeItem, SN.NodeType, SN.ParentNode, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode AS SN, RSNB WHERE SN.NodeId = RSNB.ParentNode)SELECT * FROM RSNB WHERE ParentNode = ?");
-    private static final SQL.Statement getAccessibleByUserByTypeInNode_Null = new SQL.Statement("WITH RECURSIVE RSNB AS (WITH RECURSIVE RSN as (SELECT s.NodeId, s.NodeName, s.NodeOwner, s.NodeItem, s.NodeType, s.ParentNode, s.NodeRank, s.NodeFormat, s.LastUpdate FROM SchematicNode s LEFT JOIN NodeMember n ON s.NodeId = n.NodeId WHERE (s.NodeOwner = ? OR n.UserId = ?) GROUP BY s.NodeId union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.NodeItem, SN.NodeType, SN.ParentNode, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode AS SN, RSN WHERE SN.ParentNode = RSN.NodeId) SELECT * FROM RSN WHERE NodeType = ? union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.NodeItem, SN.NodeType, SN.ParentNode, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode AS SN, RSNB WHERE SN.NodeId = RSNB.ParentNode)SELECT * FROM RSNB WHERE ParentNode is null");
+    private static final Statement getAccessibleByUserByTypeInNode_Null = new Statement("WITH RECURSIVE RSNB AS (WITH RECURSIVE RSN as (SELECT s.NodeId, s.NodeName, s.NodeOwner, s.NodeItem, s.NodeType, s.ParentNode, s.NodeRank, s.NodeFormat, s.LastUpdate FROM SchematicNode s LEFT JOIN NodeMember n ON s.NodeId = n.NodeId WHERE (s.NodeOwner = ? OR n.UserId = ?) GROUP BY s.NodeId union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.NodeItem, SN.NodeType, SN.ParentNode, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode AS SN, RSN WHERE SN.ParentNode = RSN.NodeId) SELECT * FROM RSN WHERE NodeType = ? union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.NodeItem, SN.NodeType, SN.ParentNode, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode AS SN, RSNB WHERE SN.NodeId = RSNB.ParentNode)SELECT * FROM RSNB WHERE ParentNode is null");
-    private static final SQL.Statement getAccessibleByUserByType = new SQL.Statement("WITH RECURSIVE RSN as (SELECT s.NodeId, s.NodeName, s.NodeOwner, s.NodeItem, s.NodeType, s.ParentNode, s.NodeRank, s.NodeFormat, s.LastUpdate FROM SchematicNode s LEFT JOIN NodeMember n ON s.NodeId = n.NodeId WHERE (s.NodeOwner = ? OR n.UserId = ?) GROUP BY s.NodeId union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.NodeItem, SN.NodeType, SN.ParentNode, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode AS SN, RSN WHERE SN.ParentNode = RSN.NodeId) SELECT * FROM RSN WHERE NodeType = ?");
+    private static final Statement getAccessibleByUserByType = new Statement("WITH RECURSIVE RSN as (SELECT s.NodeId, s.NodeName, s.NodeOwner, s.NodeItem, s.NodeType, s.ParentNode, s.NodeRank, s.NodeFormat, s.LastUpdate FROM SchematicNode s LEFT JOIN NodeMember n ON s.NodeId = n.NodeId WHERE (s.NodeOwner = ? OR n.UserId = ?) GROUP BY s.NodeId union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.NodeItem, SN.NodeType, SN.ParentNode, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode AS SN, RSN WHERE SN.ParentNode = RSN.NodeId) SELECT * FROM RSN WHERE NodeType = ?");
-    private static final SQL.Statement getAllSchematicsAccessibleByUser = new SQL.Statement("WITH RECURSIVE RSN as (SELECT s.NodeId, s.NodeName, s.NodeOwner, s.NodeItem, s.NodeType, s.ParentNode, s.NodeRank, s.NodeFormat, s.LastUpdate FROM SchematicNode s LEFT JOIN NodeMember n ON s.NodeId = n.NodeId WHERE (s.NodeOwner = ? OR n.UserId = ?) GROUP BY s.NodeId union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.NodeItem, SN.NodeType, SN.ParentNode, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode AS SN, RSN WHERE SN.ParentNode = RSN.NodeId) SELECT * FROM RSN");
+    private static final Statement getAllSchematicsAccessibleByUser = new Statement("WITH RECURSIVE RSN as (SELECT s.NodeId, s.NodeName, s.NodeOwner, s.NodeItem, s.NodeType, s.ParentNode, s.NodeRank, s.NodeFormat, s.LastUpdate FROM SchematicNode s LEFT JOIN NodeMember n ON s.NodeId = n.NodeId WHERE (s.NodeOwner = ? OR n.UserId = ?) GROUP BY s.NodeId union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.NodeItem, SN.NodeType, SN.ParentNode, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode AS SN, RSN WHERE SN.ParentNode = RSN.NodeId) SELECT * FROM RSN");
-    private static final SQL.Statement isSchematicAccessibleForUser = new SQL.Statement("WITH RECURSIVE RSN AS (SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeId = ? union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.ParentNode, SN.NodeType, SN.NodeItem, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode SN, RSN WHERE RSN.ParentNode = SN.NodeId) SELECT COUNT(RSN.NodeId) AS `Accessible` FROM RSN LEFT Join NodeMember NM On NM.NodeId = RSN.NodeId WHERE NodeOwner = ? OR UserId = ? LIMIT 1");
+    private static final Statement isSchematicAccessibleForUser = new Statement("WITH RECURSIVE RSN AS (SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeId = ? union select SN.NodeId, SN.NodeName, SN.NodeOwner, SN.ParentNode, SN.NodeType, SN.NodeItem, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode SN, RSN WHERE RSN.ParentNode = SN.NodeId) SELECT COUNT(RSN.NodeId) AS `Accessible` FROM RSN LEFT Join NodeMember NM On NM.NodeId = RSN.NodeId WHERE NodeOwner = ? OR UserId = ? LIMIT 1");
-    private static final SQL.Statement getAllParentsOfNode = new SQL.Statement("WITH RECURSIVE RSN AS (SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeId = ? UNION SELECT SN.NodeId, SN.NodeName, SN.NodeOwner, SN.ParentNode, SN.NodeType, SN.NodeItem, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode SN, RSN WHERE RSN.ParentNode = SN.NodeId) SELECT * FROM RSN");
+    private static final Statement getAllParentsOfNode = new Statement("WITH RECURSIVE RSN AS (SELECT NodeId, NodeName, NodeOwner, ParentNode, NodeType, NodeItem, NodeRank, NodeFormat, LastUpdate FROM SchematicNode WHERE NodeId = ? UNION SELECT SN.NodeId, SN.NodeName, SN.NodeOwner, SN.ParentNode, SN.NodeType, SN.NodeItem, SN.NodeRank, SN.NodeFormat, SN.LastUpdate FROM SchematicNode SN, RSN WHERE RSN.ParentNode = SN.NodeId) SELECT * FROM RSN");
-    private static final SQL.Statement countNodes = new SQL.Statement("SELECT COUNT(NodeId) AS 'count' FROM SchematicNode");
+    private static final Statement countNodes = new Statement("SELECT COUNT(NodeId) AS 'count' FROM SchematicNode");
-    private static final SQL.Statement updateDB = new SQL.Statement("UPDATE SchematicNode SET NodeName = ?, NodeOwner = ?, ParentNode = ?, NodeItem = ?, NodeType = ?, NodeRank = ? WHERE NodeId = ?");
+    private static final Statement updateDB = new Statement("UPDATE SchematicNode SET NodeName = ?, NodeOwner = ?, ParentNode = ?, NodeItem = ?, NodeType = ?, NodeRank = ? WHERE NodeId = ?");
-    private static final SQL.Statement updateDatabase = new SQL.Statement("UPDATE SchematicNode SET NodeData = ?, NodeFormat = ? WHERE NodeId = ?");
+    private static final Statement updateDatabase = new Statement("UPDATE SchematicNode SET NodeData = ?, NodeFormat = ? WHERE NodeId = ?");
-    private static final SQL.Statement selSchemData = new SQL.Statement("SELECT NodeData FROM SchematicNode WHERE NodeId = ?");
+    private static final Statement selSchemData = new Statement("SELECT NodeData FROM SchematicNode WHERE NodeId = ?");
-    private static final SQL.Statement deleteNode = new SQL.Statement("DELETE FROM SchematicNode WHERE NodeId = ?");
+    private static final Statement deleteNode = new Statement("DELETE FROM SchematicNode WHERE NodeId = ?");
 
     public static SchematicNode createSchematic(int owner, String name, Integer parent) {
         return createSchematicNode(owner, name, parent, SchematicType.Normal.toDB(), "");
@@ -118,7 +115,7 @@ public class SchematicNode {
         if (parent != null && parent == 0) {
             parent = null;
         }
-        SQL.Statement.ResultSetUser<SchematicNode> user = rs -> {
+        Statement.ResultSetUser<SchematicNode> user = rs -> {
             while (rs.next()) {
                 SchematicNode node = new SchematicNode(rs);
                 return node;
@@ -135,7 +132,7 @@ public class SchematicNode {
     public static List<SchematicNode> getSchematicNodeInNode(Integer parent) {
         if(parent != null && parent == 0)
             parent = null;
-        SQL.Statement.ResultSetUser<List<SchematicNode>> user = rs -> {
+        Statement.ResultSetUser<List<SchematicNode>> user = rs -> {
             List<SchematicNode> nodes = new ArrayList<>();
             while (rs.next())
                 nodes.add(new SchematicNode(rs));
@@ -151,7 +148,7 @@ public class SchematicNode {
     public static List<SchematicNode> getSchematicDirectoryInNode(Integer parent) {
         if(parent != null && parent == 0)
             parent = null;
-        SQL.Statement.ResultSetUser<List<SchematicNode>> user = rs -> {
+        Statement.ResultSetUser<List<SchematicNode>> user = rs -> {
             List<SchematicNode> nodes = new ArrayList<>();
             while (rs.next())
                 nodes.add(new SchematicNode(rs));
@@ -167,7 +164,7 @@ public class SchematicNode {
     public static SchematicNode getSchematicDirectory(String name, Integer parent) {
         if(parent != null && parent == 0)
             parent = null;
-        SQL.Statement.ResultSetUser<SchematicNode> user = rs -> {
+        Statement.ResultSetUser<SchematicNode> user = rs -> {
             while (rs.next()) {
                 SchematicNode node = new SchematicNode(rs);
                 if(node.isDir())
@@ -186,7 +183,7 @@ public class SchematicNode {
     public static SchematicNode getSchematicNode(String name, Integer parent) {
         if(parent != null && parent == 0)
             parent = null;
-        SQL.Statement.ResultSetUser<SchematicNode> user = rs -> {
+        Statement.ResultSetUser<SchematicNode> user = rs -> {
             while (rs.next()) {
                 return new SchematicNode(rs);
             }
@@ -208,7 +205,7 @@ public class SchematicNode {
     }
 
     public static List<SchematicNode> getAccessibleSchematicsOfTypeInParent(int owner, String schemType, Integer parent) {
-        SQL.Statement.ResultSetUser<List<SchematicNode>> user = rs -> {
+        Statement.ResultSetUser<List<SchematicNode>> user = rs -> {
             List<SchematicNode> nodes = new ArrayList<>();
             while (rs.next()) {
                 nodes.add(new SchematicNode(rs));

SpigotCore_Main/src/de/steamwar/sql/Statement.java

@@ -0,0 +1,159 @@
+/*
+    This file is a part of the SteamWar software.
+
+    Copyright (C) 2020  SteamWar.de-Serverteam
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+package de.steamwar.sql;
+
+import com.mysql.jdbc.exceptions.jdbc4.CommunicationsException;
+import de.steamwar.core.Core;
+import org.bukkit.configuration.file.YamlConfiguration;
+
+import java.io.File;
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.logging.Level;
+
+public class Statement {
+
+    private static final String URL;
+    private static final String USER;
+    private static final String PASSWORD;
+
+    private static Connection con;
+
+    private static final List<Statement> statements = new ArrayList<>();
+
+    static {
+        File file = new File(Core.getInstance().getDataFolder(), "MySQL.yml");
+        YamlConfiguration config = YamlConfiguration.loadConfiguration(file);
+
+        if(!file.exists())
+            throw new SecurityException("SQL-ConfigFile not found!");
+
+        URL = "jdbc:mysql://" + config.getString("HOST") + ":" + config.getString("PORT") + "/" + config.getString("DATABASE");
+        USER = config.getString("USER");
+        PASSWORD = config.getString("PASSWORD");
+
+        Statement.connect();
+    }
+
+    private static void connect() {
+        try {
+            con = DriverManager.getConnection(URL + "?useServerPrepStmts=true", USER, PASSWORD);
+        } catch (SQLException e) {
+            throw new SecurityException("Could not start SQL connection", e);
+        }
+    }
+
+    public static void close() {
+        for (Statement statement : statements) {
+            try {
+                statement.st.close();
+            } catch (SQLException e) {
+                Core.getInstance().getLogger().log(Level.INFO, "Could not close statement", e);
+            }
+        }
+
+        try {
+            con.close();
+        } catch (SQLException e) {
+            Core.getInstance().getLogger().log(Level.INFO, "Could not close SQL connection", e);
+        }
+    }
+
+    private static void reset() {
+        close();
+        connect();
+
+        try {
+            for (Statement statement : statements) {
+                statement.init();
+            }
+        } catch (SQLException ex) {
+            throw new SecurityException("Could not reprepare SQL Statements", ex);
+        }
+    }
+
+    public static boolean connectionStable() {
+        try {
+            return !con.isClosed();
+        } catch (SQLException e) {
+            return false;
+        }
+    }
+
+    private final String sql;
+    private PreparedStatement st;
+
+    Statement(String sql) {
+        this.sql = sql;
+        try {
+            init();
+        } catch (SQLException e) {
+            throw new SecurityException("Could not init statement", e);
+        }
+        statements.add(this);
+    }
+
+    private synchronized void init() throws SQLException {
+        st = con.prepareStatement(sql);
+    }
+
+    <T> T select(ResultSetUser<T> user, Object... objects) {
+        return prepare(() -> {
+            ResultSet rs = st.executeQuery();
+            T result = user.use(rs);
+            rs.close();
+            return result;
+        }, objects);
+    }
+
+    void update(Object... objects) {
+        prepare(st::executeUpdate, objects);
+    }
+
+    private synchronized <T> T prepare(SQLRunnable<T> runnable, Object... objects) {
+        try {
+            try {
+                setObjects(objects);
+                return runnable.run();
+            } catch (CommunicationsException e) {
+                reset();
+                setObjects(objects);
+                return runnable.run();
+            }
+        } catch (SQLException e) {
+            throw new SecurityException("Could not execute SQL statement", e);
+        }
+    }
+
+    private void setObjects(Object... objects) throws SQLException {
+        for (int i = 0; i < objects.length; i++) {
+            st.setObject(i + 1, objects[i]);
+        }
+    }
+
+    interface ResultSetUser<T> {
+        T use(ResultSet rs) throws SQLException;
+    }
+
+    private interface SQLRunnable<T> {
+        T run() throws SQLException;
+    }
+}

SpigotCore_Main/src/de/steamwar/sql/SteamwarUser.java

@@ -28,9 +28,9 @@ import java.util.*;
 
 public class SteamwarUser {
 
-	private static final SQL.Statement getId = new SQL.Statement("SELECT * FROM UserData WHERE id = ?");
+	private static final Statement getId = new Statement("SELECT * FROM UserData WHERE id = ?");
-	private static final SQL.Statement getUUID = new SQL.Statement("SELECT * FROM UserData WHERE UUID = ?");
+	private static final Statement getUUID = new Statement("SELECT * FROM UserData WHERE UUID = ?");
-	private static final SQL.Statement getName = new SQL.Statement("SELECT * FROM UserData WHERE lower(UserName) = ?");
+	private static final Statement getName = new Statement("SELECT * FROM UserData WHERE lower(UserName) = ?");
 
 	private static final Map<UUID, SteamwarUser> byUUID = new HashMap<>();
 	private static final Map<String, SteamwarUser> byName = new HashMap<>();

SpigotCore_Main/src/de/steamwar/sql/Team.java

@@ -26,8 +26,8 @@ import java.util.List;
 
 public class Team {
 
-    private static final SQL.Statement get = new SQL.Statement("SELECT * FROM Team WHERE TeamID = ?");
+    private static final Statement get = new Statement("SELECT * FROM Team WHERE TeamID = ?");
-    private static final SQL.Statement getMembers = new SQL.Statement("SELECT id FROM UserData WHERE Team = ?");
+    private static final Statement getMembers = new Statement("SELECT id FROM UserData WHERE Team = ?");
 
     private final int teamId;
     private final String teamKuerzel;

SpigotCore_Main/src/de/steamwar/sql/TeamTeilnahme.java

@@ -26,9 +26,9 @@ import java.util.Set;
 public class TeamTeilnahme {
     private TeamTeilnahme(){}
 
-    private static final SQL.Statement byEventTeam = new SQL.Statement("SELECT * FROM TeamTeilnahme WHERE TeamID = ? AND EventID = ?");
+    private static final Statement byEventTeam = new Statement("SELECT * FROM TeamTeilnahme WHERE TeamID = ? AND EventID = ?");
-    private static final SQL.Statement byEvent = new SQL.Statement("SELECT * FROM TeamTeilnahme WHERE EventID = ?");
+    private static final Statement byEvent = new Statement("SELECT * FROM TeamTeilnahme WHERE EventID = ?");
-    private static final SQL.Statement byTeam = new SQL.Statement("SELECT * FROM TeamTeilnahme WHERE TeamID = ?");
+    private static final Statement byTeam = new Statement("SELECT * FROM TeamTeilnahme WHERE TeamID = ?");
 
     public static boolean nimmtTeil(int teamID, int eventID){
         return byEventTeam.select(ResultSet::next, teamID, eventID);

SpigotCore_Main/src/de/steamwar/sql/UserConfig.java

@@ -24,9 +24,9 @@ import java.util.UUID;
 public class UserConfig {
     private UserConfig() {}
 
-    private static final SQL.Statement get = new SQL.Statement("SELECT Value FROM UserConfig WHERE User = ? AND Config = ?");
+    private static final Statement get = new Statement("SELECT Value FROM UserConfig WHERE User = ? AND Config = ?");
-    private static final SQL.Statement set = new SQL.Statement("INSERT INTO UserConfig (User, Config, Value) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE Value = VALUES(Value)");
+    private static final Statement set = new Statement("INSERT INTO UserConfig (User, Config, Value) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE Value = VALUES(Value)");
-    private static final SQL.Statement delete = new SQL.Statement("DELETE FROM UserConfig WHERE User = ? AND Config = ?");
+    private static final Statement delete = new Statement("DELETE FROM UserConfig WHERE User = ? AND Config = ?");
 
     public static String getConfig(UUID player, String config) {
         return getConfig(SteamwarUser.get(player).getId(), config);