Source of file Configuration.php

<?php

namespace Mcfedr\AwsPushBundle\DependencyInjection;

use Symfony\Component\Config\Definition\Builder\TreeBuilder;

use Symfony\Component\Config\Definition\ConfigurationInterface;

/**

 * This is the class that validates and merges configuration from your app/config files

 *

 * To learn more see {@link http://symfony.com/doc/current/cookbook/bundles/extension.html#cookbook-bundles-extension-config-class}

 */

class Configuration implements ConfigurationInterface

{

    /**

     * {@inheritDoc}

     */

    public function getConfigTreeBuilder()

    {

        $treeBuilder = new TreeBuilder();

        $rootNode = $treeBuilder->root('mcfedr_aws_push')

            ->children()

                ->arrayNode("aws")

                    ->children()

                        ->scalarNode("key")->isRequired()->cannotBeEmpty()->end()

                        ->scalarNode("secret")->isRequired()->cannotBeEmpty()->end()

                        ->scalarNode("region")->isRequired()->cannotBeEmpty()->end()

                    ->end()

                ->end()

                ->variableNode("platforms")->end()

                ->booleanNode("debug")->defaultFalse()->end()

                ->scalarNode("topic_arn")->cannotBeEmpty()->end()

            ->end()

        ->end();

        // Here you should define the parameters that are allowed to

        // configure your bundle. See the documentation linked above for

        // more information on that topic.

        return $treeBuilder;

    }

}