Drupal SetupĪs mentioned, the first thing you'll need to do is to install Drupal. For this third thing, we will use GraphQL and Apollo. We’re now at the point where we can use all of the classes provided by the Drupal Doctrine Cache library and Doctrine Cache in our module.There are 3 things you'll need to build this: Drupal, React and something that can bind those two together, meaning that it can fetch the data from Drupal and make it available in React. Using the CacheProvider for a Static and Persistent Cache For site implementations, it’s worth reading the Composer Manager documentation to learn how to configure folder paths and so on. When you enable your module with Drush, Composer Manager will download the library automatically and put it in the vendor folder. You can add it later by editing composer.json or using composer require. When you get to the step to define dependencies (you can modify them later), add capgemini/drupal_doctrine_cache to require the library.For the package name, use drupal/my_module_name. Run composer init to create your initial composer.json file.Open up a terminal, and change to the module directory.In the info file, depend on Composer Manager: dependencies = composer_manager.Create a Drupal module with an info file and a module file (I’ve put an example module in a sandbox).Install Composer if you haven’t installed it yet.For modules that get posted on, I like to use Composer Manager since it will handle managing Composer libraries when different contributed modules are all using Composer on the same site. The first step is to set up your module so that it requires the Drupal Doctrine Cache library. Adding Drupal Doctrine Cache with Composer If you’re not using Composer, this makes a great (and simple) example of how you can start to use modern PHP libraries in your existing Drupal 7 project. What does all this mean? If you’re already using Composer in your Drupal projects, you can easily use these classes to simplify any of your caching code. All that matters is you can reliably save, fetch, and delete cached data with a consistent interface. Calling code doesn't need to have any knowledge of these changes. Or, the persistent Drupal cache could be removed if it turned out not to improve performance. In fact, as someone using the cache object directly, you might not even know that a static cache exists! For example, the ChainCache could be updated to also persist data in a local APC cache. If you update the database (and invalidate your cached data), you can clear the static and persistent caches with a simple $cache->delete(). On top of that, ChainCache handles saving and deleting entries through the entire chain automatically. As a developer, caching data in memory in a static cache is no different than caching it in MySQL, Redis, or anything else. When fetching data, it goes through them in order until it finds the object you’re looking for. The class takes an array of CacheProvider classes that can be used to cache data. ChainCache gives us a consistent API for all of the usual cache operations. That’s no fun at all.Īfter some searching for a different project, I found the Drupal Doctrine Cache project and thought "what if I could chain the static and Drupal cache calls automatically?" - and of course, it’s already done with Doctrine’s ChainCache class. I end up searching for A Beginner's Guide to Caching Data in Drupal 7 and checking it’s examples against my code. Lately, that has been when I’ve needed to cache data from remote web services. If there’s one thing in programming that drives me up the wall, it’s patterns that I use once every few months, such that I almost remember what to do but inevitably forget some key detail.
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