On node conserve, then, we sometimes had written a node to our Elasticsearch host (in the event it is released)

or removed they from machine (if unpublished); Elasticsearch deals with upgrading an existing record or deleting a non-existent record without problems. Before writing down the node, though, we tailor-made they much. We had a need to cleaning most of the content, restructure it, merge industries, pull irrelevant sphere, an such like. All of that was accomplished regarding the travel when creating the nodes out to Elasticsearch.

Another notice about this: for efficiency factors, and also to eliminate competition ailments whenever saving nodes, we deferred the specific running to Drupal’s waiting line program. That perfectly stopped battle circumstances around being able to access nodes during node conserve and kept the consumer software quick and receptive.

There is another necessity: considering that the inbound information was actually typically incomplete we had a need to in addition transfer information from RottenTomatoes.com. Regarding we created a two covering program: a person is a generic PHP package making use of the Guzzle library that conveyed Rotten Tomatoes information as PHP stuff, whilst the additional after that bridges that system generate Drupal nodes inhabited from Rotten Tomatoes data. We subsequently matched up Rotten Tomatoes videos and ratings using customer’s origin facts and allowed editors to decide to use data from Rotten Tomatoes in favor of their in which appropriate. That data ended up being merged in through the indexing techniques aswell, very once information is in Elasticsearch it doesn’t matter in which they originated from. We additionally exposed Critic Evaluations to Elasticsearch as well so as that client programs could discover feedback of motion pictures and user ratings before you buy.

Incoming requests from customer software never strike Drupal. They only actually ever smack the Silex app servers.

The Silex app doesn’t even have to accomplish a great deal. When it comes down to line format we selected the Hypertext software code, or HAL. HAL is a simple JSON-based hypermedia format used by Drupal 8, Zend Appagility, as well as others, and it is an IETF draft specification. What’s more, it enjoys an extremely sturdy PHP library offered we managed to utilize. Since Elasticsearch already shops and profits JSON it had been trivial to map objects from Elasticsearch into HAL. The heavy lifting was simply in drawing and affixing the best hypermedia backlinks and embedded prices. Keywords along with other look queries are merely passed to Elasticsearch and results accustomed weight the best reports.

Finally, we wrapped the HAL object up in Symfony’s Response item, put all of our HTTP caching variables and ETags, and sent the message returning.

A huge benefit of the split-architecture is that rotating up a Silex example is actually insignificant. There is no important setup beyond determining the Elasticsearch server to make use of, and most code was heaved down via author. That means rotating up multiple instances of the API servers for redundancy, high-availability, or results try which has no perform. We did not need certainly to fret, though; the API try read-only, therefore with appropriate use of HTTP headers and a basic Varnish servers in front of it the API is interestingly snappy.

The Upshot

A large part of Drupal’s readiness as a CMS try recognizing it isn’t the be-all end-all answer to all difficulties.

For Ooyala as well as its consumers, Drupal had been great for managing information, but not for serving a web API. However, Palantir’s comprehension of the coming Drupal 8 release and its particular reliance from the Symfony pipeline let us combine Drupal with Silex – in fact it is an excellent option for providing a Web API however everything hot for dealing with and curating contents. In the end, Palantir chose the right tool for the task, together with project gained from this considerably.

Ooyala presently has a strong and reliable API that is able to offer clients programs we never ever even moved ourselves; Ooyala’s people bring what they want; end users have a fast and receptive internet solution powering their news solutions. And also, Palantir had the opportunity to get our very own possession dirty with another member of the Symfony family – a good investment that’ll pay-off lasting with Drupal 8 therefore the raising rise in popularity of Symfony inside the PHP ecosystem.

Just the thing for Ooyala; perfect for Palantir; great for the community.

Picture by Todd Lappin “Above Suburbia” under CC BY-NC 2.0, altered with greeen overlay in addition to choice of arrows.

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