Demystifying cache in doctrine ORM
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Applications should be fast regardless of any cache system. However, sometimes we do need to cache data in order to optimise things and deliver a fast response to the clients. This talk covers the different types of cache offered Doctrine ORM (metadata, query, result set, and second level cache), how they work together with the Unit of Work and what we should know before caching all the things.
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Demystifying cache in doctrine ORM
- 7. “ There are two hard things in Computer Science: cache invalidation, naming things, and off-by-one errors Common sense
- 9. “ a hardware or software component that stores data so future requests for that data can be served faster; the data stored in a cache might be the result of an earlier computation, or the duplicate of data stored elsewhere. Cache (computing) - Wikipedia
- 11. Our software Cache External API1. Give me “external.result”
- 12. Our software Cache External API 2. Cache miss 1. Give me “external.result”
- 13. Our software Cache External API 2. Cache miss 3. Give me data1. Give me “external.result”
- 14. Our software Cache External API 2. Cache miss 3. Give me data 4. There you go 1. Give me “external.result”
- 15. Our software Cache External API 2. Cache miss 1. Give me “external.result” 3. Give me data 4. There you go 5. Store “external.result”
- 16. Our software Cache External API 2. Cache miss 1. Give me “external.result” 3. Give me data 4. There you go 5. Store “external.result” 6. Stored!
- 17. Our software Cache External API1. Give me “external.result”
- 18. Our software Cache External API 2. Cache hit! 1. Give me “external.result”
- 23. Template Message ConsumerCampaign 1 1 1 * * * INSERT INTO consumer (name, email) VALUES (“Luís Cobucci”, “luis@me.com”); SET @consumer_id = LAST_INSERT_ID();
- 24. Template Message ConsumerCampaign 1 1 1 * * * INSERT INTO consumer (name, email) VALUES (“Luís Cobucci”, “luis@me.com”); SET @consumer_id = LAST_INSERT_ID(); INSERT INTO template (name, body) VALUES (“Template 1”, “blah… blah… blah…”);
- 25. Template Message ConsumerCampaign 1 1 1 * * * INSERT INTO consumer (name, email) VALUES (“Luís Cobucci”, “luis@me.com”); SET @consumer_id = LAST_INSERT_ID(); INSERT INTO template (name, body) VALUES (“Template 1”, “blah… blah… blah…”); INSERT INTO campaign (title, template_id, message) VALUES (“Test”, LAST_INSERT_ID(), “blah… blah… blah…”);
- 26. Template Message ConsumerCampaign 1 1 1 * * * INSERT INTO consumer (name, email) VALUES (“Luís Cobucci”, “luis@me.com”); SET @consumer_id = LAST_INSERT_ID(); INSERT INTO template (name, body) VALUES (“Template 1”, “blah… blah… blah…”); INSERT INTO campaign (title, template_id, message) VALUES (“Test”, LAST_INSERT_ID(), “blah… blah… blah…”); INSERT INTO message (campaign_id, consumer_id, sent) VALUES (LAST_INSERT_ID(), @consumer_id, FALSE);
- 27. Template Message ConsumerCampaign 1 1 1 * * * INSERT INTO consumer (name, email) VALUES (“Luís Cobucci”, “luis@me.com”); SET @consumer_id = LAST_INSERT_ID(); INSERT INTO template (name, body) VALUES (“Template 1”, “blah… blah… blah…”); INSERT INTO campaign (title, template_id, message) VALUES (“Test”, LAST_INSERT_ID(), “blah… blah… blah…”); INSERT INTO message (campaign_id, consumer_id, sent) VALUES (LAST_INSERT_ID(), @consumer_id, FALSE); Don’t forget to use a transaction!
- 29. declare(strict_types=1); $consumer = new Consumer('Luís Cobucci', 'luis@me.com'); $template = new Template('Template 1', 'blah… blah… blah…'); $campaign = new Campaign($template, 'Test', 'blah… blah… blah…'); $message = new Message($campaign, $consumer, false); $entityManager->persist($consumer); $entityManager->persist($template); $entityManager->persist($campaign); $entityManager->persist($message); $entityManager->flush();
- 30. declare(strict_types=1); $consumer = $entityManager->find('Consumer', 2); $campaign = $entityManager->find('Campaign', 1); $message = new Message($campaign, $consumer, false); $entityManager->persist($message); $entityManager->flush();
- 32. Metadata Result set Query Second Level Cache
- 33. Metadata Result set Query Second Level Cache
- 34. /** @ORMEntity */ class Consumer { /** * @ORMId * @ORMGeneratedValue * @ORMColumn(type="integer") */ private $id; /** @ORMColumn(type="string") */ private $name; /** @ORMColumn(type="string") */ private $email; }
- 35. Metadata Result set Query Second Level Cache
- 36. SELECT consumer FROM Consumer consumer;
- 37. SELECT consumer FROM Consumer consumer; SELECT c0.id AS id_0, c0.name AS name_1, c0.email AS email_2, FROM consumer c0;
- 38. Metadata Result set Query Second Level Cache
- 39. $query = 'SELECT COUNT(m) FROM Message m WHERE m.user = :user'; $count = $entityManager->createQuery($query) ->setParameter('user', 1) ->getSingleScalarResult();
- 40. $query = 'SELECT COUNT(m) FROM Message m WHERE m.user = :user'; $count = $entityManager->createQuery($query) ->setParameter('user', 1) ->useResultCache(true) ->useResultCacheLifeTime(3600) ->getSingleScalarResult();
- 41. Metadata Result set Query Second Level Cache
- 47. /** * @ORMEntity * @ORMCache(usage="NONSTRICT_READ_WRITE") */ class Consumer { // … }
- 48. /** * @ORMEntity * @ORMCache(usage="NONSTRICT_READ_WRITE") */ class Consumer { // … } READ_ONLY NONSTRICT_READ_WRITE READ_WRITE
- 49. /** * @ORMEntity * @ORMCache(usage="NONSTRICT_READ_WRITE") */ class Message { // … /** * @ORMManyToOne(targetEntity="Consumer") * @ORMCache(usage="READ_ONLY") */ private $consumer; // … }
- 50. $query = ‘SELECT m FROM Message m WHERE m.user = :user'; $messages = $entityManager->createQuery($query) ->setParameter('user', 1) ->setCacheable(true) ->getResult();
- 53. Demystifying Luís Cobucci @lcobucci https://goo.gl/oZPuRc cache in Doctrine ORM