Redom: Distributed object based server-centric user-friendly web application framework

SASADA_Koichi · January 15, 2013, 4:56pm

Hi all,

Let me introduce a new web-application framework “Redom” by Eki Ko. He
is a master course student at graduate school of The University of
Tokyo.

Redom is a distributed object based server-centric user-friendly web
application framework. Redom enables developers to write all application
logic in Ruby at server side easily using both browser-side and
server-side libraries. Redom provides distributed objects published by
browser in natural Ruby syntax so that developers can access
browser-side objects directly.

In short, you can make a dynamic web application only using server-side
Ruby program with Redom framework.

For example, you can make multi-client chat application in 47 lines
server-side Ruby program. You don’t need to write any client-side
JavaScript program.

github.com

future-azure/redom/blob/master/example/chat/chat.rb

class ChatConnection
  include Redom::Connection

  def j(arg)
    jQuery(arg)
  end

  def receive_chat_msg(event)
    nickname = j("#nickname").attr('value')
    message = j("#message").attr('value')
    j("#message").attr('value', '').focus
    sync{}
    connections.each { |conn|
      conn.async.send_chat_msg("#{escape(nickname)}: #{escape(message)}")
    }
  end

  def send_chat_msg(message)
    j("#chats").prepend j("<div>[#{Time.now.strftime('%H:%M:%S')}] #{message}</div>")
  end

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Feedback is highly welcome.

Thanks,
Koichi

SASADA_Koichi · January 16, 2013, 7:18am

On Tue, Jan 15, 2013 at 9:55 AM, SASADA Koichi [email protected] wrote:

browser-side objects directly.

Thanks,
Koichi

–
// SASADA Koichi at atdot dot net

I deem Redom fully buzzword-compliant.

SASADA_Koichi · January 16, 2013, 7:27am

Nice,

So it’s basically Google Web Toolkit (GWT:
GWT Project) for Ruby; much like
Pyjamas (http://pyjs.org/) is for Python?

How generalised will you be making the client-side, e.g.: will you be
generating a bunch of HTML+JS+CSS files which talks RESTfully with
your Ruby server; that you can then load onto PhoneGap apps?

Or is it more coupled?

Best regards,

Alec T.

PS: And yes Tamouse; gotta love the jargon

SASADA_Koichi · January 16, 2013, 3:09pm

(2013/01/16 15:27), Alec T. wrote:

So it’s basically Google Web Toolkit (GWT:
GWT Project) for Ruby; much like
Pyjamas (http://pyjs.org/) is for Python?

How generalised will you be making the client-side, e.g.: will you be
generating a bunch of HTML+JS+CSS files which talks RESTfully with
your Ruby server; that you can then load onto PhoneGap apps?

GWT (and maybe Pyjamas) compiles some language to javascript.
But redom doesn’t make any JS (and other language) code (*1). All of DOM
operations (and other JS methods) are invoked by RPC from server-side.

example:
Server-side Browser-side
alert(“hello”)
RPC ----------------> alert(“hello”)

document.foo.bar
RPC ----------------> document.foo =>
<--------------
.bar
RPC ----------------> ref1.bar

Yes, it has performance drawback because all operations need
“server->browser” RPC (and also all browser-side events such as mouse
click, etc will be sent to server-side).

We optimize huge RPCs sendig using bulk messaging technique.

*1: we support Ruby to JS compilation using Opal only for performance.

SASADA_Koichi · January 20, 2013, 8:32am

I am running the redom examples (via rackup). The http-server is running
fine, but after the initial screens of the apps, it says ‘socket closed’
in the console-log.

Ubuntu 12.10 / chromium 23.0.1271.97 / ruby-1.9.3-p327 / gems-list
attached

SASADA_Koichi · January 20, 2013, 1:27pm

Durk B. wrote in post #1092907:

I am running the redom examples (via rackup). The http-server is running
fine, but after the initial screens of the apps, it says ‘socket closed’
in the console-log.

Ubuntu 12.10 / chromium 23.0.1271.97 / ruby-1.9.3-p327 / gems-list
attached

Solved by running the redom command separately. Perhaps it was in the
manual…

SASADA_Koichi · January 22, 2013, 12:03am

Thank you for your trying.

The author Eki Ko is busy to write his master thesis
I also Cc’ed this e-mail and your suggestion will apply soon.

Any other comments (productivity and so on) is welcome.

Thanks,
Koichi