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Sling Dynamic Include
Sling Dynamic Include
Sling Dynamic Include
Sling Dynamic Include
Sling Dynamic Include
Sling Dynamic Include
Sling Dynamic Include
Sling Dynamic Include
Sling Dynamic Include
Sling Dynamic Include
Sling Dynamic Include
Sling Dynamic Include
Sling Dynamic Include
Sling Dynamic Include
Sling Dynamic Include
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Sling Dynamic Include

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Declarative caching of partially personalized pages.

Declarative caching of partially personalized pages.

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  • Interesting slides about CQ5 caching solutions ! It remains to be tested.
    Thanks !
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  • 1. APACHE SLING & FRIENDS TECH MEETUP BERLIN, 26-28 SEPTEMBER 2012 Sling Dynamic Include declarative caching of partially personalized pages Tomasz Rękawek
  • 2. adaptTo() 2012  Our CQ site contains a lot of static pages  Therefore they can be cached  Unfortunatelly, there is one small dynamic component  Current user info  Latest news  Random article  External content  ... 2 Introduction
  • 3. adaptTo() 2012 3 Geometrixx example – userinfo component
  • 4. adaptTo() 2012  Dispatcher is great in caching static pages  However, even a small dynamic component makes it useless  We want to cache the almost whole page  Selected component should be included dynamically, directly from the CQ 4 Problem
  • 5. adaptTo() 2012  Dispatcher should cache site with some static placeholder  We replace placeholder with the dynamic content after dispatcher serves the site  Helpful Sling feature: we can render only a part of the page using it URL 5 Solution http://localhost:4503/content/geometrixx/en/_jcr_content/userinfo.html
  • 6. adaptTo() 2012  So, we can place some include tag which will be replaced with the component  Include tag types available on different service layers between dispatcher and the client: 6 Solution CQ instance Dispatcher Apache Content delivery network Browser Server side includes Edge site includes AJAX
  • 7. adaptTo() 2012  AJAX is a common solution here  Drawbacks  problems with components containing JS  may not work (smoothly or at all) on mobiles  not SEO friendly  slows down the site  flickering components 7 AJAX
  • 8. adaptTo() 2012  Advantages over AJAX  Transparent for the browser / search engine  Drawbacks  requires developers to have configured additional servers (Apache or Varnish)  developers should be aware of the environment  components should be written in a special way 8 SSI/ESI
  • 9. adaptTo() 2012  Java servlet filter  It affects components with specific resource types only  Replaces it with:  SSI  ESI  AJAX include markup 9 Sling Dynamic Include
  • 10. adaptTo() 2012 10 SDI – how does it work? Filter the include sub-request /content/…/_jcr_content/carousel.html <!--include /content/…/carousel.nocache.html--> Content Pass it Get page Content Component content Filter the request Request component /content/…/_jcr_content/carousel.nocache.html httpd SDI
  • 11. adaptTo() 2012  Approach transparent for the components  and developers as well  Configured using OSGi console  can be disabled on the author / developers instances  include tag type can be easy changed  Support for the nonexisting resources 11 SDI – advantages
  • 12. adaptTo() 2012  Nonexisting (or synthetic) resource – resource without any JCR node  JSP file excerpt: <cq:include path="footer" resourceType="foundation/components/footer"/>  But footer node doesn’t exist  Component is rendered normally, because it doesn’t need any data  However, requesting http://.../_jcr_content/footer.html will return 404  SDI is able to recognize nonexisting resources and render them 12 Nonexisting resources
  • 13. adaptTo() 2012 13 Performance comparison 0 200 400 600 800 1000 1200 1400 1 2 3 4 5 6 7 8 9 10 Dispatcher+SDI Cache disabled Concurrent requests Request/s  Number of requests per second vs number of concurrent requests  Geometrixx site  SDI includes userinfo component  8 threads: 1265 req/s with and 131 req/s without SDI  Basically, it’s a difference between rendering the whole page and a small part of it
  • 14. adaptTo() 2012  SDI is available on our Github  https://github.com/Cognifide  Any questions? 14 Q&A
  • 15. adaptTo() 2012 15 Thanks

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