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Nate Drake

2006-Jan-18 01:04 UTC

[Rails] Newbie question about periodically_call_remote

Hi,

I''m new to Ruby on Rails (and Ruby itself).  So far, I''ve been
able to
find answers to most of my questions in the docs or mailing lists.  One 
thing I haven''t been able to find the answer to is how to stop a 
periodically_call_remote call.  My first Rails app is going to be a 
front-end for our Ant-based build system at work.  While the build is 
running, I''d like to give the user status info.  To do this,
I''m using a
scheme I found here: 
http://rails.techno-weenie.net/question/2005/12/24/how_do_you_display_the_progress_of_a_long_running_action
(See post 5).  The problem is, after the build has completed, I''d like 
to stop the periodically_call_remote from executing.  What is the best 
way to do this?

Thanks!

Nate

-- 
Posted via http://www.ruby-forum.com/.

Will Briggs

2006-Jan-18 01:12 UTC

head link

[Rails] Newbie question about periodically_call_remote

Well, (I think) one way to do it would be to have the
periodically_call_remote call in the HTML fragment that is being
refreshed.  In that fragment, check to see if the build is complete,
and if so, omit the call to periodically_call_remote.

I''m a Rails noob and have not done this myself, but I can''t
see any
reason why this wouldn''t work.  Maybe someone with  more AJAX
experience can come up with something better?

-Will


On 1/17/06, Nate Drake <ndrake@gmail.com> wrote:> Hi,
>
> I''m new to Ruby on Rails (and Ruby itself).  So far, I''ve
been able to
> find answers to most of my questions in the docs or mailing lists.  One
> thing I haven''t been able to find the answer to is how to stop a
> periodically_call_remote call.  My first Rails app is going to be a
> front-end for our Ant-based build system at work.  While the build is
> running, I''d like to give the user status info.  To do this,
I''m using a
> scheme I found here:
>
http://rails.techno-weenie.net/question/2005/12/24/how_do_you_display_the_progress_of_a_long_running_action
> (See post 5).  The problem is, after the build has completed, I''d
like
> to stop the periodically_call_remote from executing.  What is the best
> way to do this?
>
> Thanks!
>
> Nate
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

Nate Drake

2006-Jan-19 14:22 UTC

head link

[Rails] Re: Newbie question about periodically_call_remote

Thanks for the reply, Will!  I''ve also run into another issue.  In the 
build method of my controller, I do a IO.popen() to execute ant and 
build our app.  Even though I''m using link_to_remote to call the build 
action, it seems to block the periodically_call_remote I render to the 
client.  Should this work or am I going about this whole thing the wrong 
way?  Would it be better to use drb and have my build action talk to a 
remote app which actually runs the builds?

Below is the code I have now.  Any tips would be greatly appreciated.

Thanks!!

Nate

==== builder_controller.rb:

  def build
    # Session var containing status message to show user
    session["build_status"] = "Starting build..."

    # Session var used to indicate if a build is running
    session["building"] = 1

    session.update

    render :partial => ''status''

    IO.popen("cd /tmp && sleep 60")  # This will execute ant
    Process.wait

    if ($? >> 8) == 0 then
      session["build_status"] = "Built ok"
      session.update
    else
      session["build_status"] = "Build failed."
      session.update
    end

    session["building"] = 0
    session.update

  end

  def printStatus
      render :text => session["build_status"]
  end

==== index.rhtml:
<html>
<head>
  <title>Builder</title>
  <%= javascript_include_tag :defaults %>
</head>
<body>

  <%= link_to_remote( "click here",
      :update => "update",
      :url =>{ :action => "build" }) %>

  <div id="update">
  </div>

  <div id="status">
  </div>

</body>
</html>


==== _status.rhtml:
<p>
  <div>
    <%= periodically_call_remote(
	    :update => "status",
            :url => {:action => "printStatus"}) if
session["building"]
== 1 %>
  </div>
</p>

-- 
Posted via http://www.ruby-forum.com/.

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