[WW-3467] Improve performance for page rendering by refactoring freemarker cache

• Type: Improvement
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.1.5, 2.1.6, 2.1.8, 2.1.8.1
• Fix Version/s: 2.2.1
• Flags: Patch, Important
• Assignee: Lukasz Lenart
• Reporter: Yanming Zhou
• Created: 15/Jul/10 07:21
• Updated: 28/Oct/12 22:08
• Resolved: 17/Jul/10 10:12

Description

currently,struts2 have two inconsistent options about freemarker cache
1.<constant name="struts.freemarker.mru.max.strong.size" value="250" />
this option will used by freemarker.cache.MruCacheStorage

2.<constant name="struts.freemarker.templatesCache" value="true" />
this option will use a internal ConcurrentHashMap in FreemarkerTemplateEngine but not freemarker native cache
my patch deprecated this option and clean those code

also add a option to change default update cache interval (5 seconds)
<constant name="struts.freemarker.templatesCache.updateDelay" value="1800" />

BTW:set devMode to true will disable cache and update immediately

using cache will boost great performance, reduce 400ms to 20ms render a xhtml theme form and some textfield in my test .

I think https://issues.apache.org/jira/browse/WW-2808 could closed by adding a wiki page about how to use freemarker cache

Issue Links

• relates to: WW-3765 Improve performance of FreeMarker Template caching