Radio Liferay

Welcome to Radio Liferay, a peek into what is going on in Liferay from the people doing it themselves.


Latest Broadcast

Radio Liferay Episode 60: Performance and Permissions with Preston Crary

  An episode on the "Per" things: Performance and Permissions. I spoke to Preston Crary, who amazingly was not mad at me for losing an earlier recording.

We're talking about these (and more) topics

  • We open with the attention to detail that's required for working on performance tuning and some short conversation about this topic.
  • Sadly, there's not often a single silver bullet, but many areas of dust.
  • Sometimes the fastest code is not the most optimal
  • Continuing with Preston's work on Permissions:
  • ResourceBlock is deprecated, and there's an easy migration path
  • The usecase for Resources, ResourcePermission, and ResourceBlocks (as they're not at all visible on the UI)
  • Preston's way through Liferay from Support to working on the topics that he's now working on
  • The new API for Permissions - and the documentation is also done already (as of me writing this article, not yet published, but available on github - should be a matter of days or hours)
  • Should you implement your own permission system? (and how the answer to this question might change in 7.1)
  • Upgrades are being performance tuned. I smell a future episode coming up. Paging the team that is working on this area
  • The remarkable memory savings that refactoring the UserBag introduced
  • What happend during login
  • Passwords are PBKDF2WithHmacSHA1/160/128000 hashed, a deliberately expensive password hashing algorithm.
  • LPS-75747 and an update to my hardball question: Document Library's default.xml is still in core, can't be updated through a module, just through an ext.

Follow @RadioLiferay, Preston and me (@olafk) on twitter.

You'll find this episode - and make sure that you don't miss any of the future episodes - by subscribing to You can also subscribe on itunes.: Just search for "Radio Liferay" or just "Liferay" in the podcast directory. Make sure to write a review for the podcast directory of your choice - or find everything about Radio Liferay on

Or just download the MP3 here:

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Threaded Replies Author Date
Clicked the link to and Chrome... Dante Wang March 28, 2018 8:37 PM
Whoops, sorry - Something went wrong in the... Olaf Kock April 3, 2018 1:05 AM

Clicked the link to and Chrome warned me about invalid cert...
Posted on 3/28/18 8:37 PM.
Whoops, sorry - Something went wrong in the reconfiguration of that server. Non-https works for now, it's just a forwarder to anyways...
Thanks for letting me know
Posted on 4/3/18 1:05 AM in reply to Dante Wang.

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Radio Liferay Episode 33: Jari Järvelä, Janne Hietala on Valamis

 About a month ago I had the opportunity to talk to Jari Järvelä and Janne Hietala from Arcusys. They both head Valamis, an E-Learning solution on Liferay that later (end-of-August) won the Liferay App Contest. Unfortunately, a lot of work as well as my summer vacation kept me from releasing this podcast earlier (well, for me it was not quite unfortunate that I had a vacation)

Here are our topics:

  • the history of name changes, starting with "JSCORM"
  • The meaning and origin of the name
  • The release schedule (they met the schedule that we discussed during the recording, released end-of-August)
  • Features that have been added throughout the history of the project.
  • The version released in August now has a Curriculum Portlet that combines different courses into a Learning Path.
  • SCORM, the prevalent standard for exchanging E-Learning information. This standard is typically used as distribution format for commercial courses and Valamis supports SCORM 1.2.
  • We talked about Liferay Certification being available "soon" - that was true at the time when we recorded the podcast, it's actually available now
  • License, Availability and Price (hint: LGPL, and there's professional support available)
  • There's a steady team working full-time on Valamis.
  • Design aspects: The Arcusys Team really cares about design aspects, both in the software, as well as in their presentations.
  • Geography for beginners, we talk about finish climate, ice-fishing, and "where is Finland"
  • If you want to try Valamis without installing it yourself, just try it on their homepage: A demo environment is available
  • Picking up my favourite code demo, sevencogs, from my last-year's symposium presentation "Well Hidden Features"
  • The experience of publishing on Marketplace, PACL and PACL differences between application servers
  • Future Features and Release Plans (e.g. Tin Can API)
  • How to evolve from a Learning Management System to a Learning Portal
  • The principle of Aiming High
  • There's no shortage of standards to implement
  • The team is working with a school in Afghanistan to provide what might be the first e-learning system in an afghan school, also connecting them to finnish schools and students.
  • Upcoming Symposiums, Portal Solutions Forum, DevCon
  • Since we recorded, Valamis won the Liferay Marketplace App Contest

Follow Jari, Janne, RadioLiferay or me on twitter

Again, shoutout and big thank you to Auphonic for postproduction help. This is a fantastic service!

You'll find this episode - and make sure that you don't miss any of the future episodes - by subscribing to You can also subscribe on itunes.: Just search for "Radio Liferay" or just "Liferay" in the podcast directory.

download audio file

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Thank youOlaf for professional production. If... Janne Hietala September 24, 2013 9:41 AM
Well, any time - it's been a fun production... Olaf Kock September 25, 2013 1:47 AM

Thank youOlaf for professional production. If someone wants to ask any questions regarding the episode or Valamis, I am happy to answer emoticon
Posted on 9/24/13 9:41 AM.
Well, any time - it's been a fun production (despite the connection drops that I had to edit out ;) ). Sorry for sitting on it for too long. With what happened during that one month, it's almost worth a new episode...
Posted on 9/25/13 1:47 AM in reply to Janne Hietala.