.

config.yml

@@ -29,6 +29,12 @@ show-message-when-using-chest-and-sorting-is-enabled: false
 # logs out and back in and then uses a chest again.
 show-message-again-after-logout: true
 
+# should we check for updates on server startup?
+# when enabled, a message is printed in the console if a new
+# version has been found, and OPs will be notified when they
+# join the server
+check-for-updates: true
+
 ##########################
 ##### Sorting Method #####
 ##########################

src/de/jeffclan/JeffChestSort/JeffChestSortPlugin.java

@@ -31,12 +31,17 @@ public class JeffChestSortPlugin extends JavaPlugin {
 		JeffChestSortCommandExecutor commandExecutor = new JeffChestSortCommandExecutor(this);
 		this.getCommand("chestsort").setExecutor(commandExecutor);
 		
+		if(getConfig().getBoolean("check-for-updates",true)) {
+			updateChecker.checkForUpdate();
+		}
+		
 		@SuppressWarnings("unused")
 		Metrics metrics = new Metrics(this);
 		
 		//metrics.addCustomChart(new Metrics.SimplePie("bukkit_version", () -> getServer().getBukkitVersion()));
 		metrics.addCustomChart(new Metrics.SimplePie("sorting_method", () -> sortingMethod));
 		metrics.addCustomChart(new Metrics.SimplePie("config_version", () ->  Integer.toString(getConfig().getInt("config-version",0))));
+		metrics.addCustomChart(new Metrics.SimplePie("check_for_updates", () ->  Boolean.toString(getConfig().getBoolean("check-for-updates",true))));
 		metrics.addCustomChart(new Metrics.SimplePie("show_message_when_using_chest", () ->  Boolean.toString(getConfig().getBoolean("show-message-when-using-chest"))));
 		metrics.addCustomChart(new Metrics.SimplePie("show_message_again_after_logout", () ->  Boolean.toString(getConfig().getBoolean("show-message-again-after-logout"))));
 		metrics.addCustomChart(new Metrics.SimplePie("sorting_enabled_by_default", () -> Boolean.toString(getConfig().getBoolean("sorting-enabled-by-default"))));
@@ -55,7 +60,7 @@ public class JeffChestSortPlugin extends JavaPlugin {
 			getLogger().warning("========================================================");
 		}
 		
-		updateChecker.checkForUpdate();
+		
 	}
 	
 	@Override
@@ -80,6 +85,7 @@ public class JeffChestSortPlugin extends JavaPlugin {
 		getConfig().addDefault("show-message-when-using-chest-and-sorting-is-enabled", false);
 		getConfig().addDefault("show-message-again-after-logout", true);
 		getConfig().addDefault("sorting-method", "{itemsFirst},{name},{color}");
+		getConfig().addDefault("check-for-updates", true);
 	}
 	
 	void unregisterPlayer(Player p) {

src/de/jeffclan/JeffChestSort/JeffChestSortUpdateChecker.java

@@ -18,13 +18,16 @@ public class JeffChestSortUpdateChecker {
 
 	String latestVersionLink = "https://api.jeff-media.de/chestsort/chestsort-latest-version.txt";
 	String downloadLink = "https://www.spigotmc.org/resources/1-13-chestsort.59773/";
-	private String currentVersion;
-	private String latestVersion;
+	private String currentVersion = "undefined";
+	private String latestVersion = "undefined";
 
 	public void sendUpdateMessage(Player p) {
+		if(!latestVersion.equals("undefined")) {
 		if (!currentVersion.equals(latestVersion)) {
 			p.sendMessage(ChatColor.GRAY + "There is a new version of " + ChatColor.GOLD + "ChestSort" + ChatColor.GRAY
-					+ " available. Please download at " + downloadLink);
+					+ " available.");
+					p.sendMessage(ChatColor.GRAY + "Please download at " + downloadLink);
+		}
 		}
 	}
 
@@ -41,17 +44,20 @@ public class JeffChestSortUpdateChecker {
 
 			String inputLine = reader.readLine().trim();
 
-			currentVersion = plugin.getDescription().getVersion().trim();
 			latestVersion = inputLine;
+			currentVersion = plugin.getDescription().getVersion().trim();
 
-			plugin.getLogger().info("Latest : " + inputLine);
-			plugin.getLogger().info("Current: " + currentVersion);
+			
 			if (latestVersion.equals(currentVersion)) {
 				plugin.getLogger().info("You are using the latest version of ChestSort.");
 			} else {
+				plugin.getLogger().warning("========================================================");
 				plugin.getLogger().warning("There is a new version of ChestSort available!");
+				plugin.getLogger().warning("Latest : " + inputLine);
+				plugin.getLogger().warning("Current: " + currentVersion);
 				plugin.getLogger().warning("Please update to the newest version. Download:");
 				plugin.getLogger().warning(downloadLink);
+				plugin.getLogger().warning("========================================================");
 			}
 
 			reader.close();