Caching with PSR-6 at PHP Valencia

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.

Transcript

1. Caching with PSR-6 Valencia ! @hannesvdvreken
2. Hi, my name is Hannes.
3. "
4. madewithlove.be
5. PSR-6 Caching in PHP anno 2016
6. 1. Intro 2. Caching in 2015 3. Hello PSR-6 4. Practical
7. 1. Intro what is caching?
8. WHAT IS CACHING Speeding up your app
9. WHAT IS CACHING 1. Execute slow task 2.Remember result 3.Use stored value
10. WHAT IS CACHING Should not cause app failure
11. WHAT IS CACHING - EXAMPLES • HTTP Request • Slow DB call • Process image/zip/…
12. WHAT IS CACHING Should not cause app failure
13. WHAT IS CACHING geocode IP check cache store result check cache
14. WHAT IS CACHING Should not cause app failure
15. WHAT IS CACHING At different layers: User-Agent Webserver (Varnish/Nginx) Application Opcache
16. WHAT IS CACHING Should not cause app failure
17. 2. Caching in 2015 the state of caching (pre PSR-6)
18. APPLICATION CACHING IN 2015 1. Libraries do it 2.Frameworks do it 3.Cache libs do it
19. APPLICATION CACHING IN 2015 Frameworks & cache libs have their own: - interfaces - set of supported caching back-ends
20. APPLICATION CACHING IN 2015 Adapters everywhere!
21. APPLICATION CACHING IN 2015 Framework X cache Framework Y cache Package W cache Cache package Z Adapter W->X Adapter W->Y Adapter W->Z Adapter Y->Z
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. STAMPEDE PROTECTION
35. STAMPEDE PROTECTION
36. STAMPEDE PROTECTION
37. STAMPEDE PROTECTION
38. STAMPEDE PROTECTION
39. STAMPEDE PROTECTION
40. STAMPEDE PROTECTION
41. STAMPEDE PROTECTION
42. STAMPEDE PROTECTION
43. INTRODUCING PSR-6 Cache features: - Stampede protection - Taggable cache $item->addTags(['cat-1']); $pool->clearTags(['cat-1']);
44. INTRODUCING PSR-6 Cache features: - Stampede protection - Taggable cache - Hierarchical cache $pool->delete('tree/*');
45. 4. Practical who uses it, and how can I use it?
48. START USING IT Integration tests for implementations: cache/integration-tests
50. START USING IT class PoolIntegrationTest extends CachePoolTest { public function createCachePool() { return new CustomCachePool(); } }
51. START USING IT - UPGRADE Upgrade paths
52. START USING IT - UPGRADE Libraries
53. START USING IT - UPGRADE Libraries (next major versions) have a PSR-6 caching decorator
55. START USING IT - UPGRADE Frameworks
56. START USING IT - UPGRADE Start using PSR-6 enabled libraries with adapters for current FW’s implementation.
57. START USING IT - UPGRADE Example: Laravel PSR-6 bridge
59. START USING IT - UPGRADE use Madewithlove\IlluminatePsrCacheBridge\Laravel\CacheItemPool; use Illuminate\Contracts\Cache\Repository; $pool = new CacheItemPool( $this->app->make(Repository::class); );
60. 1. Intro 2. Caching in 2015 3. Hello PSR-6 4. Practical RECAP
62. 2016/06/20
63. Bye PSR-6, Hello PSR-16!
64. Thank you! https:/ /joind.in/talk/xxxxx @hannesvdvreken
65. Questions & discussions @hannesvdvreken