Saving exceptions to database

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

@@ -36,6 +36,7 @@ public class Core extends JavaPlugin{
 	public void onEnable() {
 		Bukkit.getPluginManager().registerEvents(new PlayerJoinedEvent(), this);
 		Bukkit.getPluginManager().registerEvents(new ChattingEvent(), this);
+		ErrorLogger.init();
 	}
 
 	@Override

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

@@ -0,0 +1,42 @@
+package de.steamwar.core;
+
+import de.steamwar.sql.SWException;
+import org.apache.logging.log4j.Level;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.core.Core;
+import org.apache.logging.log4j.core.*;
+import org.apache.logging.log4j.core.appender.AbstractAppender;
+import org.apache.logging.log4j.core.config.plugins.Plugin;
+import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
+import org.apache.logging.log4j.core.config.plugins.PluginFactory;
+
+@Plugin(name = "ErrorLogger", category = Core.CATEGORY_NAME, elementType = Appender.ELEMENT_TYPE)
+public class ErrorLogger extends AbstractAppender {
+
+    public static void init(){
+        final LoggerContext lc = (LoggerContext) LogManager.getContext(false);
+        ErrorLogger el = ErrorLogger.createAppender("SWErrorLogger");
+        el.start();
+        lc.getConfiguration().addAppender(el);
+        lc.getRootLogger().addAppender(lc.getConfiguration().getAppender(el.getName()));
+        lc.updateLoggers();
+    }
+
+    private ErrorLogger(String name) {
+        super(name, null, null);
+    }
+
+    @PluginFactory
+    public static ErrorLogger createAppender(
+            @PluginAttribute("name") String name) {
+        return new ErrorLogger(name);
+    }
+
+    @Override
+    public void append(LogEvent logEvent) {
+        if(logEvent.getLevel().isLessSpecificThan(Level.WARN))
+            return;
+
+        SWException.log(logEvent);
+    }
+}

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

@@ -0,0 +1,25 @@
+package de.steamwar.sql;
+
+import org.apache.logging.log4j.core.LogEvent;
+import org.bukkit.Bukkit;
+
+public class SWException {
+    private SWException(){}
+
+    public static void log(LogEvent logEvent){
+        String server = SQL.disarmString(Bukkit.getWorlds().get(0).getName());
+        StringBuilder stacktrace = new StringBuilder(logEvent.getSource().toString());
+
+        Throwable throwable = logEvent.getThrown();
+        while(throwable != null){
+            stacktrace.append("\nCaused by ").append(throwable.getMessage());
+
+            for(StackTraceElement ste : throwable.getStackTrace())
+                stacktrace.append("\n").append(ste.toString());
+
+            throwable = throwable.getCause();
+        }
+
+        SQL.update("INSERT INTO Exception (server, message, stacktrace) VALUES ('" + server + "', '" + SQL.disarmString(logEvent.getMessage().getFormattedMessage()) + "', '" + SQL.disarmString(stacktrace.toString()) + "')");
+    }
+}