Caching cleared up with PSR-6 at Laravel Barcelona

In this talk we will explain what PSR-6 is, why it is designed like it is, and how to use it. From the provided interfaces, the virtual package on Packagist.org, to the implementations available. Everything will be explained for both beginners and more experienced developers. We will dive into implementations, cache stampede protection, all using libraries we can find on Packagist.org. We will also show how to start using it today in our current applications by using adapters. The entire talk will be accompanied with code samples and live demos, showing both working and failing caching systems.

Audience feedback can be found here: http://www.meetup.com/Laravel-Barcelona/events/230894870/

Transcript

1. Caching with PSR-6 Laravel Barcelona ! @hannesvdvreken @laravelbcn
2. Hi, my name is Hannes.
3. "
4. madewithlove.be 20 × "&'()*
6. PSR-6 Caching in PHP anno 2016
7. 1. Intro 2. Caching in 2015 3. Hello PSR-6 4. Practical
8. 1. Intro what is caching?
9. WHAT IS CACHING Speeding up your app
10. WHAT IS CACHING 1. Execute slow task 2.Remember result 3.Use stored value
11. WHAT IS CACHING Should not cause app failure
12. WHAT IS CACHING - EXAMPLES • HTTP Request • Slow DB call • Process image/zip/…
13. WHAT IS CACHING Should not cause app failure
14. WHAT IS CACHING geocode IP check cache store result check cache
15. WHAT IS CACHING Should not cause app failure
16. WHAT IS CACHING At different layers: User-Agent Webserver (Varnish/Nginx) Application Opcache
17. WHAT IS CACHING Should not cause app failure
18. 2. Caching in 2015 the state of caching (pre PSR-6)
19. APPLICATION CACHING IN 2015 1. Libraries do it 2.Frameworks do it 3.Cache libs do it
20. APPLICATION CACHING IN 2015 Frameworks & cache libs have their own: - interfaces - support for caching systems
21. APPLICATION CACHING IN 2015 Adapters everywhere!
22. APPLICATION CACHING IN 2015 If no adapter available - Write your own - Store in different cache stores
23. 3. Hello PSR-6 what does that mean?
24. INTRODUCING PSR-6 Finalised & accepted in December 2015
25. INTRODUCING PSR-6 Repository - Entity
26. INTRODUCING PSR-6 use Psr\Cache\CacheItemPoolInterface; use Psr\Cache\CacheItemInterface; $item = $pool->getItem($key); $item->getKey();
27. INTRODUCING PSR-6 Lemme see that code
28. INTRODUCING PSR-6 Don’t instantiate your own Items. $item = $pool->getItem(‘key’) ->set($value) ->expiresAfter(3600); $pool->save($item);
29. INTRODUCING PSR-6 Item is an entity, it’s not immutable, but the Key is
30. INTRODUCING PSR-6 CacheItemInterface has no getExpiresAt
31. INTRODUCING PSR-6 Pool has support for multi-actions $pool->getItems($keys); $pool->saveDeferred($item); $pool->commit();
32. INTRODUCING PSR-6 Repository - Entity model allows extensions
33. INTRODUCING PSR-6 Cache features: - Stampede protection: Parallel incoming requests executing long process to update cache value
34. INTRODUCING PSR-6 Cache features: - Stampede protection - Taggable cache $item->addTags(['cat-1']); $pool->clearTags(['cat-1']);
35. INTRODUCING PSR-6 Cache features: - Stampede protection - Taggable cache - Hierarchical cache $pool->delete('tree/*');
36. 4. Practical who uses it, and how can I use it?
39. START USING IT Integration tests for implementations: cache/integration-tests
41. START USING IT class PoolIntegrationTest extends CachePoolTest { public function createCachePool() { return new CachePool(); } }
42. START USING IT - UPGRADE Upgrade paths
43. START USING IT - UPGRADE Libraries
44. START USING IT - UPGRADE Libraries (next major versions) have a PSR-6 caching decorator
46. START USING IT - UPGRADE Frameworks
47. START USING IT - UPGRADE Start using PSR-6 enabled libraries with adapters for current FW’s implementation.
48. START USING IT - UPGRADE Example: Laravel PSR-6 bridge
50. 1. Intro 2. Caching in 2015 3. Hello PSR-6 4. Practical RECAP
52. Hello PSR-16
53. Thank you! https:/ /joind.in/talk/xxxxx @hannesvdvreken @laravelbcn
54. Questions & discussions @hannesvdvreken @laravelbcn