[Bug 25484] New: provide a way to tell the AM to reload connection managers

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=25484

           Summary: provide a way to tell the AM to reload connection
                    managers
           Product: Telepathy
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: tp-spec
        AssignedTo: telepathy-bugs at lists.freedesktop.org
        ReportedBy: simon.mcvittie at collabora.co.uk


A bug in MC:

1) have an MSN account, but don't have butterfly installed
2) MC starts, sees the MSN account and flags it as invalid, because the CM is
missing
3) butterfly is reinstalled

At this point, MC doesn't know that the CM has been installed, so the MSN
account remains invalid.

We should either mandate that MC uses inotify() (or something) to pick up new
CMs, or provide API by which package managers (e.g. dpkg postinst scripts, RPM
%post snippets) can tell MC to re-list CMs.

Alberto has proposed the following API in MC:

o.f.T.AM.I.Reloadable.DRAFT
    The Reloadable interface provides a way to reload accounts.

    method Reload ()

        Request the reloading of all accounts. The AccountManager SHOULD
        attempt the reloading of all accounts and emit AccountValidityChanged
        for all those accounts whose validity has changed as a result of the
        reloading.

which is vague enough to be used for any other reload-like operations that
we're interested in in future (reloading .client files, reloading the file that
contains accounts, etc.).

This method isn't ideal (ideally MC could auto-detect all interesting events),
but it's harmless - a minimal implementation would be to do nothing - so I
don't oppose its addition. The fact that dbus-daemon is meant to inotify for
new services, but seems to be unreliable at doing so, indicates that the ideal
of auto-detecting new things might not be feasible.

My inclination would be that if we accept this method, we should put it on the
core AccountManager interface when it's undrafted, rather than keeping a
separate interface.


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