W3C home > Mailing lists > Public > public-mobileok-checker@w3.org > April 2009

Re: mobileOK Checker library overhaul: changes committed

From: Yeliz Yesilada <yesilady@cs.man.ac.uk>
Date: Tue, 14 Apr 2009 15:24:02 +0100
Message-Id: <1B80430C-2437-428E-8110-11A249CD2D47@cs.man.ac.uk>
Cc: public-mobileok-checker <public-mobileok-checker@w3.org>
To: Francois Daoust <fd@w3.org>
Great. I will be there as well :) so see you in Madrid.

On 14 Apr 2009, at 15:20, Francois Daoust wrote:

> Thanks,
> Yes, I will be at the WWW2009 conference next week, so we can  
> definitely meet there to talk about the Checker.
> Francois.
> Yeliz Yesilada wrote:
>> Hi Francois,
>> Thanks so much for re-factoring the code. We really appreciate  
>> your time. I will download the code and have a look. If I have any  
>> question, I will let you know.
>> Btw, will you be at the WWW2009 conference next week in Madrid?
>> Yeliz.
>> On 10 Apr 2009, at 15:07, Francois Daoust wrote:
>>> Hi,
>>> As agreed, I put my initial plan to make the library truly  
>>> extensible [1] into action. I had to make a few adjustments to  
>>> make it work. There was no real way to divide the work, so I just  
>>> went ahead and did it. I just committed the changes.
>>> The new version passes the test suite (or rather it does not, but  
>>> tests that fail actually reveal bugs of the previous version, see  
>>> bugs 6797 [2] and 6798 [3]), but I would not call it a fully  
>>> stable version at this point. I put a list of TODOs in the code,  
>>> mostly related to the way "unusual" cases are handled. Most of  
>>> them were actually already TODOs in the former version.
>>> I'll probably do a series of small commits in the upcoming days.  
>>> Code review and comments welcome!
>>> Most of the classes that composed the preprocessing step are now  
>>> gone, replaced by a new hierarchy of classes. One thing to  
>>> realize is that the *actual* code is the same as before. I just  
>>> re-factored it a bit (maybe more than just a bit).
>>> I re-generated the Javadoc of the library. It contains a more  
>>> detailed description of how things now work:
>>> http://dev.w3.org/2007/mobileok-ref/docs/org/w3c/mwi/mobileok/ 
>>> basic/package-summary.html#package_description
>>> TesterConfiguration
>>> -----
>>> This is where changes in the way the Checker retrieves, decodes  
>>> and parses resources can be introduced.
>>> This is also where the list of tests the Checker is to run on the  
>>> moki representation should go.
>>> The MobileOKConfiguration static class generates the mobileOK- 
>>> compliant configuration profile, used by default.
>>> moki schema
>>> -----
>>> I haven't changed anything in the moki schema (yet).
>>> The re-factoring revealed a small number of slight  
>>> inconsistencies. Nothing to really worry about. I'll raise  
>>> another thread on that for later updates.
>>> Multi-threading
>>> -----
>>> This was not the goal of the re-factoring, and I haven't checked  
>>> the impact yet, but the new version should be much more efficient  
>>> in terms of multi-threading. Previous version downloaded  
>>> stylesheets using multi-threading, then images, then objects and  
>>> then links. The new version retrieves all resources in parallel  
>>> (except for objects that require some special treatment to match  
>>> our wonderful object element processing rule).
>>> Also, the previous version had no limit in terms of threads,  
>>> leading to situations where 150 threads could be running  
>>> concurrently to retrieve resources. That sounded a bit aggressive  
>>> and inefficient. I set a maximum limit of 5 threads at a time.  
>>> Most of the resources associated with a given resource are likely  
>>> to come from the same origin.
>>> Adding support for the file scheme
>>> -----
>>> See how this can be done at the end of the description in the  
>>> Javadoc:
>>> http://dev.w3.org/2007/mobileok-ref/docs/org/w3c/mwi/mobileok/ 
>>> basic/package-summary.html#package_description
>>> In the end, I don't think that adding a new test outcome is  
>>> actually required. Support for the file scheme would be done in a  
>>> plug-in, separated from the library. In practice, the Checker  
>>> would run a configuration that is not the mobileOK configuration.  
>>> By definition, a global PASS outcome when the configuration is  
>>> not the mobileOK configuration does not mean anything about the  
>>> mobileOK-ness of the tested resource.
>>> One minor point: the AbstractXSLTTestTimplementation class cannot  
>>> be derived easily in plug-ins tests for the time being, because  
>>> the class searches the styleseet in the xslt subfolder of the JAR.
>>> Version number?
>>> -----
>>> Given that many classes changed and that the new version is not  
>>> backward compatible (in terms of classes, that is), I wonder how  
>>> the new version shall be named: 1.1? 2.0?
>>> Thanks,
>>> Francois.
>>> [1] http://lists.w3.org/Archives/Public/public-mobileok-checker/ 
>>> 2009Mar/0010.html
>>> [2] bug 6797: http://www.w3.org/Bugs/Public/show_bug.cgi?id=6797
>>> [3] bug 6798: http://www.w3.org/Bugs/Public/show_bug.cgi?id=6798
>>> [For tracking purpose, this is somewhat related to ACTION-916]
Received on Tuesday, 14 April 2009 14:24:42 UTC

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