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From Pratik Paranjape <>
Subject Re: Moving Wave Forward
Date Wed, 29 May 2013 08:20:24 GMT
Hello John,

It was good to see the presentation, thank you for putting it out.
Ambitious but tempting.

I would like to comment and emphasize on couple of things others have
rightly said before:

1) Federation as defined in Wave-protocol is collaboration among the
servers of different organizations to exchange the wave/wavelets e.g. Wave
server under domain acmedotcom communicating with wave server under
zuludotcom, in real time. This has always been an implemented feature of
the wave code base and was one of the first features released by the Google
team. Protocol evolution was left open ended for changing requirements
depending on adoption.

If I understood correctly, you are using the word federation as in allowing
different devices communicating with each other. This feature is really a
byproduct of good server design. All communication WILL have to go through
server. As long as the server endpoints and data models are well defined,
its possible for anyone to write a client and represent the fetched data in
any desired format. In other words, Federation at its core : Any device can
federate with any other, is actually adoption dependent and will not
require special design for Wave. Encouraging development of host of such
clients. possibly providing samples, can definitely be a point.

2) Even though there are several spots for serious improvements in wave
code ( mostly because of the new technologies and current Browser landscape
especially atuned to a product like wave: new editors, reactive servers
like node and play!, faster databases like mongo and redis), it will be
unwise to throw away the code and start from scratch (Reference:
Deprecating Java Code in slides ). Its not a small project by any
consideration and as Michael pointed out, unless there is sudden inflow of
a number of developers, its not going to be easy to make big changes even
for a commercial entity. Best way would be to put up issues one by one and
go through solving them (as the team is doing currently). Re-design and new
architecture, which is undeniably necessary, will have to evolve through
this path.

Hello Michael,

> The current codebase is largely a proof of concept.  It has some
> potential, but I think most of us would agree that some time spent
> re-architecting how we want things to work and morphing the code base into
> that (or rewriting it) would be in the projects best interests.  Again if
> we have a roadmap and people who feel strongly about working on those
> areas, we can divide and concours.

Thanks for acknowledging
Coming from someone who has been involved with Wave since very early, it
makes the point official. It will indeed first step to prepare a road map
and get agreement on a list of necessary changes. I had posted a list in
one of the earlier messages.
Of course as Upayavira has pointed out, everything of it will depend on the
developer interest, which is not up to the same level as proposed changes
at this moment.

Wishing best for Wave.

Pratik Paranjape

On Wed, May 29, 2013 at 9:10 AM, John Blossom <> wrote:

> Dave,
> Thanks, I think that we're on the same page. No doubt that Wave federation
> holds out tremendous promise. Hopefully the Apache community can move
> towards deciding how they'd like to progress towards more advanced goals. I
> welcome any and all suggestions to that end.
> Best,
> John
> On May 28, 2013 11:08 PM, "Dave" <> wrote:
> > John,
> >
> > Sorry, I wasn't trying to say that wiab provides the mobile client that
> > you are looking for, just that the wave federation concepts and their
> > implementation in the wiab server are likely to be a good fit for your
> > usecases. You suggested that the federation paradigms needed a complete
> > re-think for a "mobile-first world", and my understanding is that this
> > isn't the case.
> >
> > So while federation and the "server" component sound like a reasonable
> > fit, the mobile _client_  (supporting off-line access etc.) doesn't exist
> > yet.
> >
> > Over the years there have been a few discussions about formalising the
> > client/server protocols within wiab - but so far there hasn't been the
> > manpower to implement it.
> >
> >
> > Dave
> >
> >
> > On 29/05/13 03:30, John Blossom wrote:
> >
> >> Dave,
> >>
> >> I think that you've captured much of both the paradigm and the paradox.
> >> Wave could - and should - be able to do these things, but in the
> existing
> >> kit you really cannot do it for many of these points, and where it does
> do
> >> it one cannot say that the mobile-Web interface is elegant. In none of
> the
> >> cases, AFAIK, does it deal with the case of people initiating new Waves
> >> offline on a mobile device and adding in applets or shifting to
> different
> >> UIs for the same wave. Also not covered in the mobile client is the
> >> potential for peer-to-peer mobile Wave communication. This will be of
> >> particular importance to "next billion online people" markets. I agree
> >> that
> >> with connectivity, the client may communicate to a primary server for
> >> further downstream federation for specific waves (other servers for
> other
> >> waves, if done properly, if there is not node-to-node credentials, as in
> >> company X only wants to communicate with mobile clients directly). The
> >> email analogy is certainly clear, but Wave federation and client-server
> >> functions need to focus first on getting waves to support multiple Wave
> >> UIs, so that there will be compelling reasons to build out federation
> for
> >> email support, via presentation layer adapters.
> >>
> >> So if the client/server break is/can be formalised in code, then we can
> >> move towards a mobile-capable HTML5/JS client which is efficient,
> robust,
> >> supports multiple UIs on top of the same data sets, and which can have
> >> offline, server-like functions which can enable peer-to-peer federation.
> >>
> >> I may not be completely up to speed on the current architecture's
> status,
> >> but so far the responses that I am receiving seem to confirm where the
> >> architecture needs to adapt to modern requirements and performance
> >> expectations. Hopefully we can all work together to address the huge
> >> opportunities that those requirements present.
> >>
> >> Thanks,
> >>
> >> John
> >>
> >> On Tue, May 28, 2013 at 9:54 PM, Dave <> wrote:
> >>
> >>  John,
> >>>
> >>> I'm not a committer, but I have some familiarity with the wave stack.
> >>>
> >>>
> >>> On 29/05/13 01:23, John Blossom wrote:
> >>>
> >>>  People need their waves to live on their mobile devices, not just on
> >>>> cloud Web servers. After all, email provides local mobile offline
> >>>> capabilities.
> >>>>
> >>>>  I think you might not be 100% up to speed with some of the Wave
> >>> architecture. In an email world, people have mobile off-line access,
> but
> >>> they still use email servers.  The email server often has the
> definitive
> >>> copy of their email [i.e. imap], and mobile just retains a cached copy.
> >>> In
> >>> a mobile world, you still need a permanent server address to deliver
> mail
> >>> to, or send it through.
> >>>
> >>> This is the same with wave:
> >>>
> >>> client <---c---> server <---f---> server <---c---> client
> >>>
> >>> The federation protocol [f] sits between the two servers, and to
> support
> >>> mobile clients you would expect those clients to:
> >>>   - maintain cached waves
> >>>   - allow off-line access to those waves
> >>>   - allow off-line changes to those waves
> >>>   - propagate changes in real-time where possible
> >>>
> >>> In theory a wave server can support different clients. Unfortunately in
> >>> the current wiab codebase, there is only one client - which is the
> >>> bundled
> >>> web-client. The current code base does sort-of have the logical
> >>> client/server separation as outlined above (though some code is shared
> >>> between the server and the client), but there isn't a formally defined
> >>> client protocol [c], or separation of the web-client.
> >>>
> >>> So in a broad sense, to support mobile one would need to:
> >>>   - formalise the client-server protocol [c]
> >>>   - implement that in WIAB (ideally allowing Server and web-client to
> be
> >>> deployed separately)
> >>>   - implement your mobile clients.
> >>>
> >>> Any mobile client would still communicate through a server (as email
> does
> >>> today) allowing (among other things) third parties to interact with
> waves
> >>> whilst _I_ am offline.
> >>>
> >>>
> >>>   So if you are considering the possibility of a mobile-first world,
> you
> >>>
> >>>> really do need to
> >>>> rethink existing Wave federation paradigms seriously.
> >>>>
> >>>>  There may be some corner cases which would need tweaking, but my
> >>> understanding is that the core wave federation paradigms / protocol
> (and
> >>> the wiab federation implementation) suit mobile very well. They were
> >>> explicitly designed to support real-time when online, and disconnected
> >>> access when offline.
> >>>
> >>> Someone please correct anything I've got wrong!
> >>>
> >>> Dave
> >>>
> >>>
> >>>
> >

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