Making High-Performance Caching Easy with ColdFusion

Adobe ColdFusion has high-performance caching built-in. This presentation covers how to unlock the power of caching in your ColdFusion apps.

Transcript

1. Making High–Performance Caching Easy with ColdFusion Brian Klaas Johns Hopkins Bloomberg School of Public Health bklaas@jhsph.edu @brian_klaas
2. Our Story Graham Gaches @ Flickr
3. It’s never fast enough.
5. 1 Second
6. 10 Seconds
7. .5 / 7
8. Caching is but one of 100 solutions.
9. Caching is easy. Eviction is the challenge.
10. Refer to the CF Docs Query caching Page caching Fragment caching ORM caching
11. Object Caching
12. Ehcache Adobe CF 9+ Railo 3.2+
13. memcached OpenBD (and Wikipedia, Flickr, Craigslist)
14. Core Functions cachePut() cacheGet() cacheRemove() [isNull()]
15. Basic Code Flow Create the name of the item in the cache cacheGet(name of the item in the cache) isNull(results of getting the item in the cache)? Yes: Do the hard work cachePut(results of the hard work) No: Use the cached version
16. Query Caching in CF 10 All cached queries go in Ehcache Use cacheID attribute in <cfquery> for reference
17. Basic Code Flow Create the name of the item in the cache cacheGet(name of the item in the cache) isNull(results of getting the item in the cache)? Yes: Do the hard work cachePut(results of the hard work) No: Use the cached version
18. Basic Example <cffunction name="getCourse" returntype="course"> <cfargument name="courseID" type="numeric" required="yes" /> <cfset var courseNameInCache = "course" & arguments.courseID /> <cfset var cachedCourseInfo = cacheGet(courseNameInCache) /> <cfset var course = 0 /> <cfif isNull(cachedCourseInfo)> <cfset course = variables.courseService.getCourse(arguments.courseID) /> <cfset cachePut(courseNameInCache, course) /> <cfelse> <cfset course = cachedCourseInfo /> </cfif> <cfreturn course /> </cffunction>
19. Basic Problems Robert Sikora @ Flickr
20. Pick good cache IDs
21. cacheGetAllIds() !
22. Ehcache Monitor
23. Avoiding the Dogpile
24. <cflock> verb @ Flickr
25. By default, Ehcache shares the same JVM as CF. !
26. The 4GB Limit 4
27. Where to Cache UnprobableView @ Flickr
28. You have to know your system.
29. Customer Session Objects Example
30. Consistency
31. You know your data. You know when it changes. Plan for eviction appropriately.
32. Heavy Composition Example
33. External Data Example Jonah G.S. @ Flickr
34. Reports Example ~queequeg~ @ Flickr
35. One More Problem chrishams @ Flickr
36. On Server/App Start pobre.ch @ Flickr
37. Scheduled Tasks
38. Ehcache Autodiscovery
39. Configuring Ehcache autodiscovery [CF root]/lib/ehcache.xml, add: <cacheManagerPeerListenerFactory class="org.terracotta.ehcachedx.monitor.probe.Probe PeerListenerFactory" properties="monitorAddress=[IP address of server], monitorPort=9889, memoryMeasurement=true" /> Just before <defaultCache>. Restart CF.
40. And One More Problem raanai @ Flickr
41. And One More Problem Simple admin tool to clear caches.
42. End Result
43. Rob Brooks-Bilson’s Blog http://rob.brooks-bilson.com/
44. Session Evaluation www.cfobjective.com/sessions/
45. Thank you! Brian Klaas Johns Hopkins Bloomberg School of Public Health bklaas@jhsph.edu @brian_klaas www.iterateme.com