Skip to main content

Yet Another Event System?

Image
By
In my 9 years of consulting and implementing Tridion, I never wrote the same code twice... Kudos, Tridion -- you awesome beast! But every now and then I find myself needing the same low level handlers and I end up copy pasting them from somewhere.

For example, with Event Systems I always prefer putting the configuration in a System Component in Tridion. I put it maybe in the current Publication metadata or current Folder/Structure Group meta. I always end up writing the same code to handle the reading of this Component, checking for modifications, caching it for a few minutes, then making the configuration values available inside some object model.

Recently, this annoyed me enough to write an Event System base-project that takes care of this once and for all... Enter the Yet Another Event System framework. Functional requirements:

  • Rapid development -- provide a base ready to be used in actual Event System development
  • System Component is in free format -- provide a consistent API to parse it to object model and extract configuration values from it
  • Read System Components from various places:
    • Publication meta
    • specific Folder/SG meta
    • current Folder/SG meta
  • Allow caching of the Configuration Component such that performance is not hindered by too many reads, parses, updates of the System Component
    • Configurable caching time interval
  • Allow searching for System Component recursively (configurable) into the parent Folder/SG
  • Allow merging of values from several System Components found/specified -- this one is great for BluePrinting. Different Configuration Component can be created in different Publications, then they can simply be used in a lower Publication, localized or not and their values are merged/overridding previous values
  • Easy deployment -- file-system only, don't bother with GAC!
Next post will present the actual code and provide some samples.
Labels:

Comments

Post a Comment

Popular posts from this blog

Running sp_updatestats on AWS RDS database

By
Part of the maintenance tasks that I perform on a MSSQL Content Manager database is to run stored procedure sp_updatestats . exec sp_updatestats However, that is not supported on an AWS RDS instance. The error message below indicates that only the sa  account can perform this: Msg 15247 , Level 16 , State 1 , Procedure sp_updatestats, Line 15 [Batch Start Line 0 ] User does not have permission to perform this action. Instead there are several posts that suggest using UPDATE STATISTICS instead: https://dba.stackexchange.com/questions/145982/sp-updatestats-vs-update-statistics I stumbled upon the following post from 2008 (!!!), https://social.msdn.microsoft.com/Forums/sqlserver/en-US/186e3db0-fe37-4c31-b017-8e7c24d19697/spupdatestats-fails-to-run-with-permission-error-under-dbopriveleged-user , which describes a way to wrap the call to sp_updatestats and execute it under a different user: create procedure dbo.sp_updstats with execute as 'dbo' as...
1 comment
Read more

I Have Gone Dark

By Unknown
Maybe it's the Holidays, but my mood has gone pretty dark. That is, regarding the look and feel of my computer and Tridion CME, of course. What I did was to dim the lights on the operating system, so I installed Placebo themes for Windows 7 . I went for the Ashtray look -- great name :) My VM looks now like this: But, once you change the theme on Windows, you should 'match' the theme of your applications. Some skin easily, some not. The Office suite has an in-built scheme, which can be set to Black , but it doesn't actually dim the ribbon tool bars -- it looks quite weird. Yahoo Messenger is skinnable, but you can't change the big white panels where you actually 'chat'. Skype is not skinnable at all. For Chrome, there are plenty of grey themes. Now i'm using Pro Grey . But then I got into changing the theme of websites. While very few offer skinnable interfaces (as GMail does), I had to find a way to darken the websites... Enter Stylish -- a pl...
4 comments
Read more

REL Standard Tag Library

By
The RSTL is a library of REL tags providing standard functionality such as iterating collections, conditionals, imports, assignments, XML XSLT transformations, formatting dates, etc. RSTL distributable is available on my Google Code page under  REL Standard Tag Library . Always use the latest JAR . This post describes each RSTL tag in the library explaining its functionality, attributes and providing examples. For understanding the way expressions are evaluated, please read my post about the  Expression Language used by REL Standard Tag Library . <c:choose> / <c:when> / <c:otherwise> Syntax:     <c:choose>         <c:when test="expr1">             Do something         </c:when>         <c:when test="expr2">             Do something else         </c:when...
2 comments
Read more