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

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