Hello Nicolas,
Nicolas Malin <nicolas.ma...@nereide.fr> writes:
> This thread about a "simple" problem highlights the difficulty for a
> plugin to extend the framework on different elements. Since many years
> I search different solution to how surcharge correctly the framework
> and it was not easy :)
This is indeed a desirable but hard problem to solve.
> Maybe I have two different solutions, based on theidea to usethemodel
> pattern toload all plugin surcharge at the ofbiz start like services
> and entities
> * The first, load all screen engine modelsin memory at start, but I
> fearthatit would be too expensive on memory (load unnecessary screens)
> * The second, create an'extend model' who permit to surcharge all
> screen engine model elements,andload it on ofbiz start and when we
> load a model, we check on extend model if the element have surcharge
> to apply just before settingit as immutable and put it in cache.
>
> example :
> <extend-form location='component://party/widget/PartyForms.xm'
> name='ViewPartyGroup'>
> <field name="partyId" >
> <hyperlink description="Goto my plugin with : ${parameters.partyId}"
> target="/myplugin/control/viewprofile" target-type="inter-app"
> target-window="blank_">
> <parameter param-name="partyId"/>
> </hyperlink>
> </field>
> </extend-form>
I find the “extend” term confusing in that case, because AIUI extending
is more about defining a new thing by inheriting from what is extended.
If I understand the semantics of your example correctly, it is more
about monkey patching [1]
‘component://party/widget/PartyForms.xml#ViewPartyGroup' than to create
an extended of version of it. Is that a correct interpretation?
If my interpretation is correct, it is not clear what should happen when
multiple plugings modify/patch the same form?
> With this, we would have a plugin that can surcharge a screen, a form,
> a menu without changingnothing in the framework, identify clearly what
> change has been made and a failure support when the extend can't be
> applied.
>
> Currently I didn't found a solution to surcharge ftl.
>
> If you feel that it's a good way to explore, I will start a new thread.
I guess I have started the thread :-)
[1] https://en.wikipedia.org/wiki/Monkey_patch
--
Mathieu Lirzin
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