gistfile1.php

<?php
// in a controller
$app->get('/some-page', function() use ($app) {
  $address = $app['session']->getAddress();
  return $app->render('view.html.twig', ['address' => $address]);
});



// in the extended SessionServiceProvider class
protected $app;

public function register(Application $app)
{
  $this->app = $app;

  $app['session.test'] = false;

  $app['session'] = $app->share(function ($app) {
    if (!isset($app['session.storage'])) {
      if ($app['session.test']) {
        $app['session.storage'] = $app['session.storage.test'];
      } else {
        $app['session.storage'] = $app['session.storage.native'];
      }
    }

    if(!isset($app['session.attributebag'])) {
      $app['session.attributebag'] = null;
    }
    if(!isset($app['session.flashbag'])) {
      $app['session.flashbag'] = null;
    }

    return new Session($app['session.storage'], $app['session.attributebag'], $app['session.flashbag'], $app);
  });

  $app['session.storage.handler'] = $app->share(function ($app) {
    return new NativeFileSessionHandler($app['session.storage.save_path']);
  });

  $app['session.storage.native'] = $app->share(function ($app) {
    return new NativeSessionStorage(
      $app['session.storage.options'],
      $app['session.storage.handler']
    );
  });

  $app['session.storage.test'] = $app->share(function() {
    return new MockFileSessionStorage();
  });

  $app['session.storage.options'] = array();
  $app['session.default_locale'] = 'en';
  $app['session.storage.save_path'] = null;
}




// in the extended Session class
public function getAddress()
{
  if(is_null($this->address))
  {
    if(!$data = $this->get('address'))
    {
      // call the API to get current user address
      $data = $this->app['api']->getAddress();
      $this->set('address', $data);
    }
    $this->address = new \mynamespace\Address($data);
  }
  return $this->address;
}