Re: [xwiki-devs] [PROPOSAL] Implement decorators in xwiki-platform-container

On 01/08/2018 12:29 PM, Thomas Mortagne wrote: Nice; just created XWIKI-14948 to deal with this particular interface. We should be able to find more decorators in the near future.

> On Mon, Jan 8, 2018 at 11:51 AM, Clément Aubin <aubincleme(a)gmail.com> wrote: >> Hi devs, >> >> This proposal is related to the following discussion on IRC : >> https://botbot.me/freenode/xwiki/2018-01-08/?msg=95495049&page=5 >> >> Abstract: We currently have an abstraction of the notion of a >> "container" defined in xwiki-platform-container-api [1]. This >> abstraction is very basic, but allows XWiki to support two different >> types of containers : Servlet and Portlet, and maybe support other types >> in the future. >> >> Problem: As those abstractions are very basic, it's quite hard to use >> them without downcasting them. A common example is the following: if I >> want to send a redirection in a Response object [2], I will need either >> to forge my own output that returns the correct HTTP code, with the >> correct header, etc … or I can downcast the given Response to all of its >> possible implementations and, for each implementation, find the correct >> method to use for sending a redirect. >> >> In order to avoid such tricks in the future, we could implement >> decorators that will allow Request and Response implementations to >> handle certain actions. In my previous example, a Response implementing >> RedirectResponse would expose a method `#sendRedirect(String url)`. The >> advantage here is that we don't really need to know on which Response >> implementation we are working on. >> >> WDYT ? >> >> Thanks, >> >> Clément >> >> [1] >> https://github.com/xwiki/xwiki-platform/tree/master/xwiki-platform-core/xwi… >> >> [2] >> https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwi… > > >