Replace default/fallback servers with a server priority list.

api/src/main/java/net/md_5/bungee/api/config/ListenerInfo.java

@@ -1,8 +1,11 @@
 package net.md_5.bungee.api.config;
 
 import java.net.InetSocketAddress;
+import java.util.List;
 import java.util.Map;
+import lombok.AccessLevel;
 import lombok.Data;
+import lombok.Getter;
 
 /**
  * Class representing the configuration of a server listener. Used for allowing
@@ -29,14 +32,10 @@ public class ListenerInfo
      */
     private final int tabListSize;
     /**
-     * Name of the server which users will be taken to by default.
+     * List of servers in order of join attempt. First attempt is the first
+     * element, second attempt is the next element, etc etc.
      */
-    private final String defaultServer;
-    /**
-     * Name of the server which users will be taken when current server goes
-     * down.
-     */
-    private final String fallbackServer;
+    private final List<String> serverPriority;
     /**
      * Whether reconnect locations will be used, or else the user is simply
      * transferred to the default server on connect.
@@ -68,4 +67,29 @@ public class ListenerInfo
      * Whether to enable udp query.
      */
     private final boolean queryEnabled;
+
+    /**
+     * Gets the highest priority server to join.
+     *
+     * @return default server
+     * @deprecated replaced by {@link #serverPriority}
+     */
+    @Deprecated
+    public String getDefaultServer()
+    {
+        return serverPriority.get( 0 );
+    }
+
+    /**
+     * Gets the second highest priority server to join, or else the highest
+     * priority.
+     *
+     * @return fallback server
+     * @deprecated replaced by {@link #serverPriority}
+     */
+    @Deprecated
+    public String getFallbackServer()
+    {
+        return ( serverPriority.size() > 1 ) ? serverPriority.get( 1 ) : getDefaultServer();
+    }
 }