On Fri, Mar 9, 2012 at 4:47 PM, Jerome Velociter <[email protected]> wrote:
> On Fri, Mar 9, 2012 at 3:26 PM, Marius Dumitru Florea
> <[email protected]> wrote:
>> On Fri, Mar 9, 2012 at 4:10 PM, Vincent Massol <[email protected]> wrote:
>>>
>>> On Mar 9, 2012, at 3:02 PM, Denis Gervalle wrote:
>>>
>>>> On Fri, Mar 9, 2012 at 14:54, Marius Dumitru Florea <
>>>> [email protected]> wrote:
>>>>
>>>>> Hi devs,
>>>>>
>>>>> Some time ago Jerome Velociter raised a vote [1] for adding a JSON
>>>>> Velocity Tool. The vote passed but the tool wasn't committed. I'd like
>>>>> to do it know (for 4.0M1) with two changes:
>>>>>
>>>>> 1. Use Jackson [2] instead of json-lib [3] because it has a more recent
>>>>> release
>>>>>
>>>>
>>>> Isn't  json-lib already a dependency available, should we use another one ?
>>>
>>> +1 to use only one json lib in xwiki! :)
>>
>> Fine.. since json-lib is already used in public API
>> (com.xpn.xwiki.plugin.packaging.PackageAPI) I'll stick with it.
>
> Jackson is considered faster, by several orders. Some articles/threads
> that talks about it :
> - 
> http://www.lshift.net/blog/2011/12/28/benchmarking-simple-json-generation-in-java
> - http://www.sencha.com/forum/archive/index.php/t-94883.html
>

> It can be a case for Jackson : if we are to use that tool for
> generating livetable values, performance is a big deal.

That's my use case. I want to refactor the macros from
XWiki.LiveTableResultsMacros to generate the "JSON" in memory (using
actually plain Java data types like maps and lists/arrays) so that I
can adjust it before the response is send to the client. This way I
can avoid duplicating the code from XWiki.LiveTableResultsMacros just
to add a new property to the generated JSON or to modify the value of
an existing property.

Since json-lib is used only in xwiki-platform-oldcore by the package
plugin I think it's fine to:

* use Jackson in JSONTool
* when we refactor the package plugin into a component (if we still
needed it at that point) we can also change the code to use Jackson. I
can add a comment in the pom for this so that we don't forget about
it.

WDYT?

I'm +1 for this.

Thanks,
Marius

>
> my 2 cents
>
> Jerome
>
>
>>
>> Thanks,
>> Marius
>>
>>>
>>> Thanks
>>> -Vincent
>>>>
>>>>
>>>>> 2. Add only the toJSON method for now because we can use
>>>>> $escapetool.javascript to accomplish the same result as toValueString
>>>>>
>>>>> Reply quickly if you are against it.
>>>>>
>>>>> Thanks,
>>>>> Marius
>>>>>
>>>>> [1] http://www.mail-archive.com/[email protected]/msg11395.html
>>>>> [2] http://jackson.codehaus.org/
>>>>> [3] http://json-lib.sourceforge.net/
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>
>
> --
> Jérôme Velociter
> Winesquare
> http://www.winesquare.net/
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