Hi devs,
To further fuel this discussion, I will mention some points that are more
or less problematic when removing the notion of virtual mode (checks for
xwiki.isVirtualMode()), since a direct change would leave a some pieces of
code dead (never called) or just need a bit of discussion on them:
1. c.x.x.s.XWikiHibernateBaseStore.initHibernate(XWikiContext context) [1]
That piece of code seems to only run when the wiki is not in virtual mode.
>From what I managed to understand from Thomas [2], it's probably this case:
"in your hibernate configuration if you set a database which is not called
'xwiki'. In virtual mode this configuration is not taken into account and
you have to indicate the name of the database in xwiki.cfg".
I think we need to review this behavior. IMO, we should do take this
configuration into account in virtual mode as well, as long as there is no
other technical impediment. It is a configuration for the main wiki after
all, and it should still be valid.
2. c.x.x.XWiki.onPluginPreferenceEvent(Event event, XWikiDocument doc,
XWikiContext context) [3]
This piece of code seems to reload the plugins if the "plugins" property
changed in XWikiPreferences, but only if the wiki is not in virtual mode. I
think we need to change this to happen for any wiki and the plugins need to
be reloaded only for that specific wiki for which the change happened (if
it is possible).
3. extension.vm - extensionActionButton macro [4]
This UI code decides when to displays the (Un)Install button of an
extension for the current wiki or for the entire farm. Removing the virtual
mode check will always show the (un)install on farm button. I think Marius
had some concerns about his one.
4. distribution.vm - displayMainUiStep_unknownPreviousUI [5]
This code assumes that if virtualMode is true, then the product is XEM,
otherwise it's XE. This is used to propose old version names for the 2
products. Obviously this is needs to be refactored and use a different way
of determining which is which.
5. c.x.x.p.w.WikiManager
public List<Wiki> getAllWikis(XWikiContext context) throws
XWikiException [6]
We have decided that c.x.x.XWiki.getVirtualWikisDatabaseNames will also
return the main wiki's name. However, the WikiManager plugin can not do
this so easily because the main wiki's descriptor may not exist. How could
we handle this, in order to be consistent? Would creating programmatically
the main wiki's descriptor with default values on ApplicationReady event do
any good? Will it do any harm?
Thanks,
Eduard
----------
[1]
https://github.com/xwiki/xwiki-platform/blob/3019c6e0df112adf980641c75aaaffb2f0b17c6f/xwiki-platform-core/xwiki-platform-oldcore/src/main/java/com/xpn/xwiki/store/XWikiHibernateBaseStore.java#L214
[2]
https://github.com/xwiki/xwiki-platform/commit/ce3d9d28aefdb327d407ef179a4c869ccce74478#commitcomment-2679994
[3]
https://github.com/xwiki/xwiki-platform/blob/3019c6e0df112adf980641c75aaaffb2f0b17c6f/xwiki-platform-core/xwiki-platform-oldcore/src/main/java/com/xpn/xwiki/XWiki.java#L6521
[4]
https://github.com/xwiki/xwiki-platform/blob/3019c6e0df112adf980641c75aaaffb2f0b17c6f/xwiki-platform-core/xwiki-platform-web/src/main/webapp/templates/extension.vm#L971
[5]
https://github.com/xwiki/xwiki-platform/blob/3019c6e0df112adf980641c75aaaffb2f0b17c6f/xwiki-platform-core/xwiki-platform-web/src/main/webapp/templates/distribution.vm#L194
[6]
https://github.com/xwiki/xwiki-platform/blob/3019c6e0df112adf980641c75aaaffb2f0b17c6f/xwiki-platform-core/xwiki-platform-wiki-manager/xwiki-platform-wiki-manager-api/src/main/java/com/xpn/xwiki/plugin/wikimanager/WikiManager.java#L223
On Fri, Feb 22, 2013 at 3:48 PM, Eduard Moraru <[email protected]> wrote:
> Hi devs,
>
> To be more precise, the essence of my proposed change [1] is to actually
> always return "true" in the isVirtualMode() method, ignoring any
> configuration and marking the method as @deprecated, to be removed in
> future versions.
>
> Is there any reason not to do this? (Why) Would we want to preserve the
> possibility of going back to a non-virtual mode? (mostly addressed to
> Thomas, but to others as well)
>
> Thanks,
> Eduard
>
> ----------
> [1]
> https://github.com/xwiki/xwiki-platform/commit/ce3d9d28aefdb327d407ef179a4c869ccce74478
>
>
>
>
> On Fri, Feb 22, 2013 at 3:39 PM, Eduard Moraru <[email protected]>wrote:
>
>> Hi devs,
>>
>> As some of you have already noticed and already started providing
>> feedback (thank you), I have pushed a feature branch [1] that proposes the
>> removal of the virtual mode concept (making it enabled and fixed by
>> default).
>>
>> I have also gone trough the code in xwiki-platform and removed, in the
>> feature branch, dead code (code branches that will never be reached because
>> of this change). Some tests were also adapted to the new change. I have
>> also tried a build of xwiki-platform with these changes and it built
>> successfully.
>>
>> First of all, I want to make sure that we agree on the change, since
>> Thomas already mentioned that he does not agree (but I need more details).
>>
>> Second, if we agree, please take the time to look over the changes
>> (particularly in the modules that you each have experience in) and double
>> check that the logic of the code was not altered in any way.
>>
>> I will not be merging this branch until I get a general green light from
>> the committers, and until everybody is happy :)
>>
>> Please share your opinion both on this mail and/or on the specific
>> changes in the github commits.
>>
>> Thanks,
>> Eduard
>>
>> ----------
>> [1]
>> https://github.com/xwiki/xwiki-platform/commits/feature-deprecate-virtual-mode
>>
>>
>>
>> On Mon, Feb 18, 2013 at 4:53 PM, Thomas Mortagne <
>> [email protected]> wrote:
>>
>>> On Mon, Feb 18, 2013 at 3:48 PM, Thomas Mortagne
>>> <[email protected]> wrote:
>>> > On Mon, Feb 18, 2013 at 3:38 PM, Eduard Moraru <[email protected]>
>>> wrote:
>>> >> Hi Thomas,
>>> >>
>>> >> On Mon, Feb 18, 2013 at 3:45 PM, Thomas Mortagne
>>> >> <[email protected]>wrote:
>>> >>
>>> >>> On Mon, Feb 18, 2013 at 2:07 PM, Eduard Moraru <[email protected]
>>> >
>>> >>> wrote:
>>> >>> > Hi devs,
>>> >>> >
>>> >>> > According to the Roadmap of 5.0 [1][2] we will be deprecating the
>>> virtual
>>> >>> > mode API and moving to a virtual-by-default mode instead.
>>> >>> >
>>> >>> > The idea is that the multiwiki environment should be the default
>>> and,
>>> >>> > anyone wanting to use the single-wiki mode (as XE was doing in the
>>> past),
>>> >>> > will simply not create any subwiki. It is just pointless to have 2
>>> >>> products
>>> >>> > for such a simple fact and it also confuses users that have
>>> downloaded
>>> >>> and
>>> >>> > started to use one product and later on realise that they needed
>>> the
>>> >>> other.
>>> >>> > Also, when installing the wiki-manager and/or workspace
>>> extension(s)
>>> >>> > (because you might want to create subwikis/workspaces), there will
>>> be no
>>> >>> > need to stop the wiki, enable-virtual mode and restart it; all
>>> will be
>>> >>> > doable in the browser.
>>> >>> >
>>> >>> > Therefore, I`m sending this mail to ask your opinion about this
>>> topic, in
>>> >>> > case you might have something to say against it, and also to
>>> brainstorm
>>> >>> on
>>> >>> > the required changes and implications on existing code so that the
>>> >>> > transition is as smooth and invisible as possible.
>>> >>> >
>>> >>> > Proposed changes:
>>> >>> > - Remove "xwiki.virtual" from xwiki.cfg(.vm)
>>> >>> > -- remove the usage of the "$xwikiCfgVirtual" maven property from
>>> >>> > xwiki-platform (, xwiki-enteprise and xwiki-manager)
>>> >>> > - Deprecate boolean com.xpn.xwiki.XWiki.isVirtualMode() (and the
>>> >>> api.XWiki
>>> >>> > version)
>>> >>> > -- change its code to
>>> ((getVirtualWikisDatabaseNames(context).size() ==
>>> >>> 1)
>>> >>> > ? true : false) until it is removed by the deprecation process.
>>> >>>
>>> >>> -1. It means that you are going to be in non virtual mode when
>>> >>> starting XEM which is very wrong and the complete opposite of what we
>>> >>> want here. We should deprecate and don't touch it's implementation in
>>> >>> any way other that returning true by default instead of false when
>>> >>> there is nothing in the configuration. Again as you said the goal is
>>> >>> to be in virtual mode by default, period. If the UI want to do
>>> >>> something different when there is only one wiki the UI should test if
>>> >>> there is only one wiki but breaking all extensions counting on the
>>> >>> virtual mode is very bad API breakage.
>>> >>>
>>> >>
>>> >> I agree. The isVirtualMode check was supposed to tell you if "there
>>> can be
>>> >> more than one wiki", while I was suggesting to transform it to "are
>>> there
>>> >> currently more than one wikis?", which is obviously not equivalent.
>>> >>
>>> >>
>>> >>> >
>>> >>> > Possibly needed changes:
>>> >>> > - Add main wiki default descriptor to xwiki-enterprise-ui (so that
>>> >>> > getVirtualWikisDatabaseNames includes the main wiki and also to
>>> avoid DNS
>>> >>> > issues (?) caused by how we handle virtual mode)
>>> >>>
>>> >>> This is useless IMO:
>>> >>> * the fact that getVirtualWikisDatabaseNames does not return the main
>>> >>> wiki when there is no descriptor for it is a bug that should be fixed
>>> >>>
>>> >>
>>> >> Ok. I have created the jira issue for it:
>>> >> http://jira.xwiki.org/browse/XWIKI-8829
>>> >>
>>> >> Also, on the same topic, I think that we should also expose the
>>> >> getVirtualWikisDatabaseNames method in api.XWiki. Maybe we should
>>> rename it
>>> >> to something simpler like api.XWiki.getAllWikis() or
>>> getAllWikiNames().
>>> >
>>> > Yes, "getVirtualWikisDatabaseNames" is not very nice.
>>>
>>> This name is also pretty wrong btw since that's wiki names and not
>>> database names which could be very different.
>>>
>>> >
>>> >>
>>> >>
>>> >>> * I don't see how having a descriptor with localhost in it will help
>>> >>> in any way not having DNS issue, it's not helping much in XEM it's
>>> not
>>> >>> going to be better in XE. IMO the right solution is to fallback on
>>> >>> main wiki by default when the wiki is unknown instead of sending a
>>> >>> redirect to some URL which cannot work and only allow to enable this
>>> >>> redirect URL as an option
>>> >>>
>>> >>
>>> >> Ok, so we comment out xwiki.virtual.redirect in xwiki.cfg and, by
>>> default,
>>> >> redirect to the main wiki's Main.WebHome.
>>> >
>>> > I carefully chose "fallback" and not "redirect" because a real
>>> > redirect is impossible here since no URL will really be right or the
>>> > main wiki. The idea would be to do exactly the same thing we do with
>>> > IP, www.*,.
>>> >
>>> >>
>>> >> An existing jira issue that is very related to this topic is
>>> >> http://jira.xwiki.org/browse/XWIKI-479 We could reuse that.
>>> >
>>> > Yes we can reuse it but not follow the proposal in the comments.
>>> >
>>> >>
>>> >> Thanks,
>>> >> Eduard
>>> >>
>>> >>>
>>> >>> > -- or have it generated programmatically at startup if it does not
>>> exist
>>> >>> > (might be safer this way, since people might be using a different
>>> UI than
>>> >>> > xwiki-enterprise-ui)
>>> >>> >
>>> >>> > I will start working on this locally and see if I can spot other
>>> issues,
>>> >>> > but please share your thoughts.
>>> >>> >
>>> >>> > Thanks,
>>> >>> > Eduard
>>> >>> >
>>> >>> > ----------
>>> >>> > [1] http://markmail.org/message/o6adfbscpidnn7zr
>>> >>> > [2] http://jira.xwiki.org/browse/XWIKI-8822
>>> >>> > _______________________________________________
>>> >>> > devs mailing list
>>> >>> > [email protected]
>>> >>> > http://lists.xwiki.org/mailman/listinfo/devs
>>> >>>
>>> >>>
>>> >>>
>>> >>> --
>>> >>> Thomas Mortagne
>>> >>> _______________________________________________
>>> >>> devs mailing list
>>> >>> [email protected]
>>> >>> http://lists.xwiki.org/mailman/listinfo/devs
>>> >>>
>>> >> _______________________________________________
>>> >> devs mailing list
>>> >> [email protected]
>>> >> http://lists.xwiki.org/mailman/listinfo/devs
>>> >
>>> >
>>> >
>>> > --
>>> > Thomas Mortagne
>>>
>>>
>>>
>>> --
>>> Thomas Mortagne
>>> _______________________________________________
>>> devs mailing list
>>> [email protected]
>>> http://lists.xwiki.org/mailman/listinfo/devs
>>>
>>
>>
>
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