#704 Implement reloading via injector

- Create interfaces Reloadable and SettingsDependent to recognize reloadable classes
- Iterate through instances in injector to reload

src/main/java/fr/xephi/authme/command/executable/authme/ReloadCommand.java

@@ -4,7 +4,11 @@ import fr.xephi.authme.AuthMe;
 import fr.xephi.authme.ConsoleLogger;
 import fr.xephi.authme.command.CommandService;
 import fr.xephi.authme.command.ExecutableCommand;
+import fr.xephi.authme.datasource.DataSource;
+import fr.xephi.authme.initialization.AuthMeServiceInitializer;
 import fr.xephi.authme.output.MessageKey;
+import fr.xephi.authme.settings.NewSetting;
+import fr.xephi.authme.settings.properties.DatabaseSettings;
 import org.bukkit.command.CommandSender;
 
 import javax.inject.Inject;
@@ -18,10 +22,25 @@ public class ReloadCommand implements ExecutableCommand {
     @Inject
     private AuthMe plugin;
 
+    @Inject
+    private AuthMeServiceInitializer initializer;
+
+    @Inject
+    private NewSetting settings;
+
+    @Inject
+    private DataSource dataSource;
+
     @Override
     public void executeCommand(CommandSender sender, List<String> arguments, CommandService commandService) {
         try {
-            plugin.reload();
+            settings.reload();
+            // We do not change database type for consistency issues, but we'll output a note in the logs
+            if (!settings.getProperty(DatabaseSettings.BACKEND).equals(dataSource.getType())) {
+                ConsoleLogger.info("Note: cannot change database type during /authme reload");
+                sender.sendMessage("Note: cannot change database type during /authme reload");
+            }
+            initializer.performReloadOnServices();
             commandService.send(sender, MessageKey.CONFIG_RELOAD_SUCCESS);
         } catch (Exception e) {
             sender.sendMessage("Error occurred during reload of AuthMe: aborting");