GUACAMOLE-102: Initial addition of connection weight to JDBC authentication extension

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/001-create-schema.sql

@@ -34,7 +34,6 @@ CREATE TABLE `guacamole_connection_group` (
   `max_connections_per_user` int(11),
   `enable_session_affinity`  boolean NOT NULL DEFAULT 0,
 
-
   PRIMARY KEY (`connection_group_id`),
   UNIQUE KEY `connection_group_name_parent` (`connection_group_name`, `parent_id`),
 
@@ -65,6 +64,10 @@ CREATE TABLE `guacamole_connection` (
   -- Concurrency limits
   `max_connections`          int(11),
   `max_connections_per_user` int(11),
+  
+  -- Connection weight
+  `connection_weight`        int(11),
+
 
   PRIMARY KEY (`connection_id`),
   UNIQUE KEY `connection_name_parent` (`connection_name`, `parent_id`),

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/upgrade/upgrade-pre-0.9.12.sql

@@ -0,0 +1,25 @@
+--
+-- Licensed to the Apache Software Foundation (ASF) under one
+-- or more contributor license agreements.  See the NOTICE file
+-- distributed with this work for additional information
+-- regarding copyright ownership.  The ASF licenses this file
+-- to you under the Apache License, Version 2.0 (the
+-- "License"); you may not use this file except in compliance
+-- with the License.  You may obtain a copy of the License at
+--
+--   http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing,
+-- software distributed under the License is distributed on an
+-- "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+-- KIND, either express or implied.  See the License for the
+-- specific language governing permissions and limitations
+-- under the License.
+--
+
+--
+-- Add per-user password set date
+--
+
+ALTER TABLE guacamole_connection
+    ADD COLUMN connection_weight int(11);

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/java/org/apache/guacamole/auth/mysql/MySQLEnvironment.java

@@ -87,6 +87,11 @@ public class MySQLEnvironment extends JDBCEnvironment {
      */
     private int DEFAULT_MAX_CONNECTIONS = 0;
 
+    /**
+     * The default value for the connection weight for a connection in
+     * a balancing group.
+    private int DEFAULT_CONNECTION_WEIGHT = 0;
+
     /**
      * The default value for the default maximum number of connections to be
      * allowed to any one connection group. Note that, as long as the legacy
@@ -194,6 +199,14 @@ public class MySQLEnvironment extends JDBCEnvironment {
         );
     }
 
+    @Override
+    public int getDefaultConnectionWeight() throws GuacamoleException {
+        return getProperty(
+            MySQLGuacamoleProperties.MYSQL_DEFAULT_CONNECTION_WEIGHT,
+            DEFAULT_CONNECTION_WEIGHT
+        );
+    }
+
     @Override
     public int getDefaultMaxGroupConnections() throws GuacamoleException {
         return getProperty(

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/java/org/apache/guacamole/auth/mysql/MySQLGuacamoleProperties.java

@@ -174,6 +174,18 @@ public class MySQLGuacamoleProperties {
 
     };
 
+    /**
+     * The connection weight for connections in balancing groups.
+     */
+    public static final IntegerGuacamoleProperty
+            MYSQL_DEFAULT_CONNECTION_WEIGHT =
+            new IntegerGuacamoleProperty() {
+       
+        @Overide
+        public String getName() { return "mysql-default-connection-weight"; }
+
+    };
+
     /**
      * The maximum number of concurrent connections to allow to any one
      * connection group by an individual user. Zero denotes