version 1.1.1

minor code style improvements

.gitignore

@@ -2,3 +2,4 @@ lib/
 target/
 *.iml
 .idea/
+bukkit-testserver/

LICENSE.md

@@ -3,9 +3,11 @@
 * src/main/java/de/craftinc/borderprotection/BorderManager.java
 * src/main/java/de/craftinc/borderprotection/Commands.java
 * src/main/java/de/craftinc/borderprotection/Messages.java
+* src/main/java/de/craftinc/borderprotection/PlayerLoginListener.java
 * src/main/java/de/craftinc/borderprotection/PlayerMoveListener.java
 * src/main/java/de/craftinc/borderprotection/PlayerTeleportListener.java
 * src/main/java/de/craftinc/borderprotection/Plugin.java
+* src/main/java/de/craftinc/borderprotection/UpdateHelper.java
 * src/main/resources/plugin.yml
 
 full text of GPLv3 can be found in the file "GPLv3"

pom.xml

@@ -5,7 +5,7 @@
     <groupId>de.craftinc</groupId>
     <artifactId>CraftincBorderProtection</artifactId>
     <packaging>jar</packaging>
-    <version>1.0.2</version>
+    <version>1.1.1</version>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -18,13 +18,53 @@
                 <filtering>true</filtering>
             </resource>
         </resources>
+        <plugins>
+            <plugin>
+                <artifactId>maven-dependency-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>copy-dependencies</goal>
+                        </goals>
+                        <configuration>
+                            <outputDirectory>${project.build.directory}/lib</outputDirectory>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <artifactId>exec-maven-plugin</artifactId>
+                <groupId>org.codehaus.mojo</groupId>
+                <version>1.2.1</version>
+                <executions>
+                    <execution>
+                        <id>Run Test Bukkit Server</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>exec</goal>
+                        </goals>
+                        <configuration>
+                            <executable>${basedir}/scripts/test-deployment.sh</executable>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
     </build>
 
     <dependencies>
         <dependency>
             <groupId>org.bukkit</groupId>
             <artifactId>bukkit</artifactId>
-            <version>RELEASE</version>
+            <version>1.5-R0.1-SNAPSHOT</version>
+            <type>jar</type>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.bukkit</groupId>
+            <artifactId>craftbukkit</artifactId>
+            <version>1.5-R0.1-SNAPSHOT</version>
             <type>jar</type>
             <scope>compile</scope>
         </dependency>

scripts/minecraft.sh

@@ -0,0 +1,160 @@
+#!/bin/bash
+
+SCRIPT_DIR=$(readlink -f $(dirname "$0"))
+SERVICE='craftbukkit*.jar'
+#USERNAME="minecraft"
+CPU_COUNT=2
+BUKKIT="$SCRIPT_DIR/../target/lib/$SERVICE"
+INVOCATION="java -Xmx1000M -Xms300M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=$CPU_COUNT -XX:+AggressiveOpts -jar $BUKKIT nogui"
+MCPATH="$SCRIPT_DIR/../bukkit-testserver"
+
+if [ ! -d "$MCPATH" ]; then
+    mkdir -p "$MCPATH"
+fi
+
+ME=$(whoami)
+as_user() {
+    #if [ $ME == $USERNAME ] ; then
+        bash -c "$1"
+    #else
+        #su - $USERNAME -c "$1"
+    #fi
+}
+
+mc_start() {
+    if ps ax | grep -v grep | grep -v -i SCREEN | grep "craftbukkit" > /dev/null
+    then
+        echo "Tried to start but $SERVICE was already running!"
+    else
+        echo "$SERVICE was not running... starting."
+        cd "$MCPATH"
+        as_user "cd "$MCPATH" && screen -dmS minecraft $INVOCATION"
+        sleep 7
+        if ps ax | grep -v grep | grep -v -i SCREEN | grep "craftbukkit" > /dev/null
+        then
+            echo "$SERVICE is now running."
+        else
+            echo "Could not start $SERVICE."
+        fi
+    fi
+}
+
+mc_stop() {
+    if ps ax | grep -v grep | grep -v -i SCREEN | grep "craftbukkit" > /dev/null
+    then
+        echo "$SERVICE is running... stopping."
+        as_user "screen -p 0 -S minecraft -X eval 'stuff \"save-all\"\015'"
+        sleep 2
+        as_user "screen -p 0 -S minecraft -X eval 'stuff \"stop\"\015'"
+        sleep 6
+    else
+        echo "$SERVICE was not running."
+    fi
+    if ps ax | grep -v grep | grep -v -i SCREEN | grep "craftbukkit" > /dev/null
+    then
+        echo "$SERVICE could not be shut down... still running."
+    else
+        echo "$SERVICE is shut down."
+    fi
+}
+
+mc_save() {
+    if ps ax | grep -v grep | grep -v -i SCREEN | grep "craftbukkit" > /dev/null
+    then
+        echo "$SERVICE is running... saving."
+        as_user "screen -p 0 -S minecraft -X eval 'stuff \"save-all\"\015'"
+    else
+        echo "$SERVICE was not running."
+    fi
+}
+
+mc_reload() {
+    if ps ax | grep -v grep | grep -v -i SCREEN | grep "craftbukkit" > /dev/null
+    then
+        echo "$SERVICE is running... reloading."
+        as_user "screen -p 0 -S minecraft -X eval 'stuff \"reload\"\015'"
+    else
+        echo "$SERVICE was not running."
+    fi
+}
+
+mc_reload_or_start() {
+    if ps ax | grep -v grep | grep -v -i SCREEN | grep "craftbukkit" > /dev/null
+    then
+        echo "$SERVICE was already running! Doing a reload now!"
+        mc_reload
+    else
+        echo "$SERVICE was not running... starting."
+        cd "$MCPATH"
+        as_user "cd \"$MCPATH\" && screen -dmS minecraft $INVOCATION"
+        sleep 7
+        if ps ax | grep -v grep | grep -v -i SCREEN | grep "craftbukkit" > /dev/null
+        then
+            echo "$SERVICE is now running."
+        else
+            echo "Could not start $SERVICE."
+        fi
+    fi
+}
+
+mc_ddidderr_admin() {
+    if ps ax | grep -v grep | grep -v -i SCREEN | grep "craftbukkit" > /dev/null
+    then
+        echo "$SERVICE is running... making ddidder to admin and reloading permissions."
+        as_user "screen -p 0 -S minecraft -X eval 'stuff \"pex user ddidderr group set admin\"\015'"
+        as_user "screen -p 0 -S minecraft -X eval 'stuff \"pex reload\"\015'"
+    else
+        echo "$SERVICE was not running."
+    fi
+}
+
+case "$1" in
+    start)
+        echo "Starting Minecraft..."
+        mc_start
+        echo "DONE"
+        ;;
+    stop)
+        echo "Stopping Minecraft..."
+        as_user "screen -p 0 -S minecraft -X eval 'stuff \"say SERVER SHUTTING DOWN!\"\015'"
+        mc_stop
+        echo "DONE"
+        ;;
+    restart)
+        as_user "screen -p 0 -S minecraft -X eval 'stuff \"say SERVER REBOOT IN 10 SECONDS.\"\015'"
+        $0 stop
+        sleep 1
+        $0 start
+        ;;
+    reload)
+        mc_reload
+        ;;
+    reload_or_start)
+        echo "Starting or reloading Minecraft..."
+        mc_reload_or_start
+        echo "DONE"
+        ;;
+    ddidderr_admin)
+        mc_ddidderr_admin
+        ;;
+    connected)
+        as_user "screen -p 0 -S minecraft -X eval 'stuff \"who\"\015'"
+        sleep 2s
+        tac "$MCPATH"/server.log | grep -m 1 "Connected"
+        ;;
+    status)
+        if ps ax | grep -v grep | grep -v -i SCREEN | grep "craftbukkit" > /dev/null
+        then
+            echo "$SERVICE is running."
+        else
+            echo "$SERVICE is not running."
+        fi
+        ;;
+    save)
+        mc_save
+        ;;
+    *)
+        echo "Usage: /etc/init.d/minecraft {start|stop|restart|connected|status}"
+        exit 1
+        ;;
+esac

scripts/test-deployment.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+SCRIPT_DIR=$(readlink -f $(dirname "$0"))
+
+BUKKIT_DIR="$SCRIPT_DIR/../bukkit-testserver"
+PLUGIN_DIR="$SCRIPT_DIR/../bukkit-testserver/plugins"
+
+# TODO: This is a bad solution! Maven should write necessary information into an extra file.
+ARTIFACT_ID="$(grep -C3 '<groupId>de.craftinc' "$SCRIPT_DIR/../pom.xml" | grep '<artifactId>' | sed 's/\s*<artifactId>//g' | sed 's/<\/artifactId>\s*//g')"
+
+# TODO: This is a bad solution! Maven should write necessary information into an extra file.
+VERSION="$(grep -C3 '<groupId>de.craftinc' "$SCRIPT_DIR/../pom.xml" | grep '<version>' | sed 's/\s*<version>//g' | sed 's/<\/version>\s*//g')"
+
+
+mkdir -p "$PLUGIN_DIR"
+
+cp "$SCRIPT_DIR/../target/$ARTIFACT_ID-$VERSION".jar "$PLUGIN_DIR/$ARTIFACT_ID".jar
+
+echo -e "ddidderr\nmice_on_drugs\nMochaccino" > "$BUKKIT_DIR/ops.txt"
+
+"$SCRIPT_DIR/minecraft.sh" reload_or_start

src/main/java/de/craftinc/borderprotection/Border.java

@@ -122,8 +122,6 @@ public class Border implements ConfigurationSerializable
         map.put(rectPoint2Name, LocationSerializer.serializeLocation(rectPoint2));
         map.put(isActiveKey, isActive);
 
-        System.out.println(map);
-
         return map;
     }
 

src/main/java/de/craftinc/borderprotection/Commands.java

@@ -53,6 +53,29 @@ public class Commands implements CommandExecutor
                 return true;
             }
 
+            // checkversion
+            if ( args.length > 0 && args[0].equalsIgnoreCase("checkversion") )
+            {
+                if ( !sender.hasPermission("craftinc.borderprotection.update") )
+                {
+                    sender.sendMessage(Messages.noPermissionCheckversion);
+                    return false;
+                }
+
+                if ( UpdateHelper.newVersionAvailable() )
+                {
+                    sender.sendMessage(
+                            Messages.updateMessage(UpdateHelper.cachedLatestVersion, UpdateHelper.getCurrentVersion()));
+                    return true;
+                }
+                else
+                {
+                    sender.sendMessage(Messages.noUpdateAvailable);
+                    return true;
+                }
+
+            }
+
             // set
             if ( ( args.length == 2 || args.length == 3 ) && args[0].equalsIgnoreCase("set") )
             {
@@ -71,7 +94,7 @@ public class Commands implements CommandExecutor
                         borderManager.setBorder(( (Player) sender ).getWorld(), Double.parseDouble(args[1]));
                         Border border = Border.getBorders().get(world);
                         sender.sendMessage(Messages.borderCreationSuccessful);
-                        sender.sendMessage(Messages.borderInfo(world.getName(), border.toString()));
+                        sender.sendMessage(Messages.borderInfo(world.getName(), border.toString(), border.isActive()));
                     }
                     catch ( Exception e )
                     {
@@ -86,7 +109,7 @@ public class Commands implements CommandExecutor
                         borderManager.setBorder(( (Player) sender ).getWorld(), args[1], args[2]);
                         Border border = Border.getBorders().get(world);
                         sender.sendMessage(Messages.borderCreationSuccessful);
-                        sender.sendMessage(Messages.borderInfo(world.getName(), border.toString()));
+                        sender.sendMessage(Messages.borderInfo(world.getName(), border.toString(), border.isActive()));
                     }
                     catch ( Exception e )
                     {
@@ -120,20 +143,38 @@ public class Commands implements CommandExecutor
 
                 Border border = Border.getBorders().get(world);
 
-                sender.sendMessage(Messages.borderInfo(world.getName(), border.toString()));
+                sender.sendMessage(Messages.borderInfo(world.getName(), border.toString(), border.isActive()));
                 return true;
             }
 
             // on
             if ( args.length == 1 && ( args[0].equalsIgnoreCase("on") || args[0].equalsIgnoreCase("off") ) )
             {
+                if ( !sender.hasPermission("craftinc.borderprotection.set") )
+                {
+                    sender.sendMessage(Messages.noPermissionSet);
+                    return false;
+                }
+
                 World world = ( (Player) sender ).getWorld();
-                if (args[0].equalsIgnoreCase("on")) {
-                    Border.getBorders().get(world).enable();
-                    sender.sendMessage(Messages.borderEnabled);
-                } else {
-                    Border.getBorders().get(world).disable();
-                    sender.sendMessage(Messages.borderDisabled);
+                Border border = Border.getBorders().get(world);
+
+                if ( border != null )
+                {
+                    if ( args[0].equalsIgnoreCase("on") )
+                    {
+                        border.enable();
+                        sender.sendMessage(Messages.borderEnabled);
+                    }
+                    else
+                    {
+                        border.disable();
+                        sender.sendMessage(Messages.borderDisabled);
+                    }
+                }
+                else
+                {
+                    sender.sendMessage(Messages.borderInfoNoBorderSet);
                 }
 
                 // save the new border

src/main/java/de/craftinc/borderprotection/Messages.java

@@ -22,6 +22,8 @@ public class Messages
 {
     private static final String NEWLINE = "\n";
 
+    private static final String pluginName = Plugin.getPlugin().getDescription().getName();
+
     private static String makeCmd( String command, String explanation, String... args )
     {
         StringBuilder sb = new StringBuilder();
@@ -66,13 +68,14 @@ public class Messages
             makeCmd("/cibp get", "shows the borders of the current world");
 
     public static String helpGeneral =
-            ChatColor.GREEN + "CraftInc BorderProtection - Usage:" + NEWLINE +
+            ChatColor.GREEN + pluginName + " - Usage:" + NEWLINE +
             makeCmd("help", "shows this help") +
             makeCmd("get | info", "shows the border of the current world") +
             makeCmd("on | off", "enables/disables the border of the current world") +
             makeCmd("set", "Border rectangle edges will be this far away from point of origin.", "<integer>") +
             makeCmd("set", "Border rectangle is defined by the two points. A point is specified as: x,z",
-                    "<point1>", "<point2>");
+                    "<point1>", "<point2>") +
+            makeCmd("checkversion", "Checks for a newer version.");
 
     public static String borderCreationSuccessful
             = ChatColor.YELLOW + "New border was set " +
@@ -80,22 +83,33 @@ public class Messages
               ChatColor.YELLOW + "!";
 
     public static String commandIssuedByNonPlayer
-            = ChatColor.RED + "Only a player can use CraftInc BorderProtection commands!";
+            = ChatColor.RED + "Only a player can use " + pluginName + " commands!";
 
-    public static String borderInfo( String worldName, String borderDef )
+    public static String borderInfo( String worldName, String borderDef, Boolean isBorderEnabled )
     {
+        String borderEnabled;
+        if (isBorderEnabled)
+        {
+            borderEnabled = ChatColor.GREEN + "enabled";
+        } else {
+            borderEnabled = ChatColor.RED + "disabled";
+        }
 
         return ChatColor.WHITE + "Borders of world " +
                ChatColor.YELLOW + worldName +
                ChatColor.WHITE + ": " +
-               ChatColor.YELLOW + borderDef;
+               ChatColor.YELLOW + borderDef + ChatColor.WHITE + "." + NEWLINE +
+               ChatColor.WHITE + "Border is " + borderEnabled + ChatColor.WHITE + ".";
     }
 
     public static String borderInfoNoBorderSet =
-            ChatColor.YELLOW + "No border here.";
+            ChatColor.YELLOW + "No border in this world.";
 
     public static String noPermissionSet =
-            ChatColor.RED + "Sorry, you don't have permission to set the border.";
+            ChatColor.RED + "Sorry, you don't have permission to change the border.";
+
+    public static String noPermissionCheckversion =
+            ChatColor.RED + "Sorry, you don't have permission to check for new versions.";
 
     public static String borderEnabled =
             ChatColor.YELLOW + "Border enabled.";
@@ -108,4 +122,17 @@ public class Messages
 
     public static String borderEnableDisableException =
             ChatColor.RED + "Error: Could not save border state on server. After the next reload this border state will be lost!";
+
+    public static String updateMessage( String newVersion, String curVersion )
+    {
+        return ChatColor.RED + pluginName + ": New version available!" + NEWLINE +
+               ChatColor.YELLOW + "Current version: " + ChatColor.WHITE + curVersion + NEWLINE +
+               ChatColor.YELLOW + "New version: " + ChatColor.WHITE + newVersion + NEWLINE +
+               ChatColor.YELLOW + "Please visit:" + NEWLINE +
+               ChatColor.AQUA + "http://dev.bukkit.org/server-mods/craftinc-borderprotection" + NEWLINE +
+               ChatColor.YELLOW + "to get the latest version!";
+    }
+
+    public static String noUpdateAvailable =
+            ChatColor.YELLOW + "No updates available.";
 }

src/main/java/de/craftinc/borderprotection/PlayerLoginListener.java

@@ -0,0 +1,51 @@
+/*  Craft Inc. BorderProtection
+    Copyright (C) 2013  Paul Schulze
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+package de.craftinc.borderprotection;
+
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerLoginEvent;
+
+public class PlayerLoginListener implements Listener
+{
+    @SuppressWarnings("unused")
+    @EventHandler(priority = EventPriority.LOWEST)
+    public void onPlayerLogin( PlayerLoginEvent e )
+    {
+        final Player player = e.getPlayer();
+
+        if ( e.getPlayer().hasPermission("craftinc.borderprotection.update") )
+        {
+            if ( UpdateHelper.newVersionAvailable() )
+            {
+                // Schedule a task which delays 20 ticks (1 second) and then sends a message to the player
+                Bukkit.getScheduler().scheduleSyncDelayedTask(Plugin.getPlugin(), new Runnable()
+                {
+                    @Override
+                    public void run()
+                    {
+                        player.sendMessage(Messages.updateMessage(UpdateHelper.cachedLatestVersion,
+                                                                  UpdateHelper.getCurrentVersion()));
+                    }
+                }, 20L);
+            }
+        }
+    }
+}

src/main/java/de/craftinc/borderprotection/PlayerMoveListener.java

@@ -56,9 +56,15 @@ public class PlayerMoveListener implements Listener
     }
 
     @SuppressWarnings("unused")
-    @EventHandler(priority = EventPriority.NORMAL)
+    @EventHandler(priority = EventPriority.HIGHEST)
     public void onPlayerMove( PlayerMoveEvent e )
     {
+        // do nothing if the event is already cancelled
+        if (e.isCancelled())
+        {
+            return;
+        }
+
         // do nothing if player has the ignoreborders permission
         if ( e.getPlayer().hasPermission("craftinc.borderprotection.ignoreborders") )
         {

src/main/java/de/craftinc/borderprotection/PlayerTeleportListener.java

@@ -33,9 +33,15 @@ public class PlayerTeleportListener implements Listener
     }
 
     @SuppressWarnings("unused")
-    @EventHandler(priority = EventPriority.LOWEST)
+    @EventHandler(priority = EventPriority.HIGHEST)
     public void onPlayerMove( PlayerTeleportEvent e )
     {
+        // do nothing if the event is already cancelled
+        if (e.isCancelled())
+        {
+            return;
+        }
+
         // do nothing if player has the ignoreborders permission
         if ( e.getPlayer().hasPermission("craftinc.borderprotection.ignoreborders") )
         {

src/main/java/de/craftinc/borderprotection/Plugin.java

@@ -46,16 +46,20 @@ public class Plugin extends JavaPlugin
         Plugin.cibpPlugin = this;
 
         BorderManager borderManager = new BorderManager();
+
+        // create listeners
         PlayerMoveListener playerMoveListener = new PlayerMoveListener(borderManager);
         PlayerTeleportListener playerTeleportListener = new PlayerTeleportListener(borderManager);
+        PlayerLoginListener playerLoginListener = new PlayerLoginListener();
 
         // commands
         Commands commandExecutor = new Commands(borderManager);
         getCommand("cibp").setExecutor(commandExecutor);
 
-        // listeners
+        // register listeners
         PluginManager pm = this.getServer().getPluginManager();
         pm.registerEvents(playerMoveListener, this);
         pm.registerEvents(playerTeleportListener, this);
+        pm.registerEvents(playerLoginListener, this);
     }
 }

src/main/java/de/craftinc/borderprotection/UpdateHelper.java

@@ -0,0 +1,98 @@
+/*  Craft Inc. BorderProtection
+    Copyright (C) 2013  Paul Schulze
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+package de.craftinc.borderprotection;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLConnection;
+
+public class UpdateHelper
+{
+    /**
+     * The URL from which the Plugin tries to get the latest version.
+     */
+    @SuppressWarnings("FieldCanBeLocal")
+    private static final String updateUrl = "http://www.craftinc.de/plugins/update/craftinc-borderprotection";
+
+    /**
+     * The latest version which was seen on last check.
+     */
+    public static String cachedLatestVersion = null;
+
+
+    /**
+     * Gets the latest version from the updateURL and returns it as <code>String</code>.
+     *
+     * @return latest version as <code>String</code>.
+     */
+    @SuppressWarnings("StringBufferMayBeStringBuilder")
+    public static String getLatestVersion()
+    {
+        // StringBuffer is thread-safe. Don't know if this is really important here, but safe is safe :).
+        StringBuffer s = new StringBuffer();
+        try
+        {
+            URLConnection c = new URL(updateUrl).openConnection();
+            BufferedReader br = new BufferedReader(new InputStreamReader(c.getInputStream()));
+            String inputLine;
+            while ( ( inputLine = br.readLine() ) != null )
+            {
+                s.append(inputLine);
+            }
+            br.close();
+        }
+        catch ( MalformedURLException e )
+        {
+            Plugin.getPlugin().getLogger().warning("Could not check for latest version. Update URL is malformed.");
+        }
+        catch ( IOException e )
+        {
+            Plugin.getPlugin().getLogger().warning("Could not check for latest version. Update URL was not readable.");
+        }
+
+        // update cached latest version
+        cachedLatestVersion = s.toString();
+
+        return s.toString();
+    }
+
+
+    /**
+     * Gets the current version of this plugin directly from the plugin.yml version entry.
+     *
+     * @return current version as <code>String</code>.
+     */
+    public static String getCurrentVersion()
+    {
+        return Plugin.getPlugin().getDescription().getVersion();
+    }
+
+
+    /**
+     * Checks if a newer version is available.
+     *
+     * @return Boolean
+     */
+    public static Boolean newVersionAvailable()
+    {
+        return !getCurrentVersion().equals(getLatestVersion());
+    }
+
+}

src/main/resources/plugin.yml

@@ -17,6 +17,7 @@
 name: Craft Inc. BorderProtection
 main: de.craftinc.borderprotection.Plugin
 version: ${project.version}
+softdepend: [Multiverse-Core]
 authors: [ddidderr, mice_on_drugs]
 website: http://www.craftinc.de/plugins/borderprotection
 
@@ -32,3 +33,6 @@ permissions:
   craftinc.borderprotection.ignoreborders:
     default: op
     description: Allows to be everywhere on the map (ignoring the borders).
+  craftinc.borderprotection.update:
+    default: op
+    description: Allows to get notified on login, when a new update is available.