this is just some notes in preparation for the slides

Symfony2-in-the-trenches.markdown

Topics

Setup

• PHP requirements: 5.3, ext/intl
• https://github.com/symfony/symfony-sandbox vs. https://github.com/symfony/symfony-bootstrapper vs. ..
• submodules vs. vendor scripts vs. MR
  • submodule cons: not everything is in git (svn, mercurial etc)
  • vendor script cons: risk of things getting out of sync
  • MR cons: not cross platform

Resources

• http://docs.symfony-reloaded.org/master/
• http://symfony2bundles.org
• http://docs.symfony-reloaded.org/master/contributing/community/other.html

Dependency Injection

• http://fabien.potencier.org/article/11/what-is-dependency-injection
• container injection
  • pros: quick to setup, full lazy loading (request, response)
  • cons: dependencies not easily visible, dependencies cannot be customized on a per service basis, unit testing ugly
• constructor injection
  • pros: clear dependencies both in the code and DI config
  • cons: no way to handle optional dependencies, boilerplate code
• setter injection
  • pros: allow's to handle optional dependencies to some degree
  • cons: more boilerplate code, dependency definition cluttered
• interface injection
  • pros: less chance for typos
  • cons: more boilerplate code, dependencies cannot be customized on a per service basis

Symfony2 code flow

• config recommendations
  • config import
  • yaml vs. xml
  • yaml merge key http://yaml.org/type/merge.html
  • xsd
• controllers as service
• base Controller vs. POPO
• request vs. sub-requests (parameter propagation)
• single vs. multiple separate front controllers
  • separation frontend vs. admin not necessary anymore
  • however for large apps it pays to separate code during development
    • step by step updates possible
    • multiple teams working
  • main/MainKernel.php vs. app/main/MainKernel.php

Caching

• structuring controllers for ESI
  • forward() is no longer your performance enemy
  • break up controller actions based on cache settings
• varnish

Deployment

• rsync vs. Debian (https://github.com/liip/sf2debpkg) vs. ..

3rd party Bundles

• FOS\UserBundle
• FOS\AsseticBundle
• FOS\FacebookBundle
• Liip\ViewBundle
• Liip\FunctionalTestBundle
  • functional testing
• Sonata\BaseApplicationBundle
• Sonata\EasyExtendBundle?
• ..