From: Eric Hodel <drbrain@...7.net>
Date: 2007-10-12T01:10:34+09:00
Subject: Re: question DRb class definition share or not share


On Oct 11, 2007, at 08:45 , Jack wrote:

> Just go through ruby cookbook & only tutorial for any DRb stuff. But I
> need help explain below example that I don't understand why DRbUndump
> is not needed. On some of the samples, I see class definition is
> defined in a separate file and was 'require' by both client & server.
> But in this case, the class definition is embedded in server side
> code.
>
> The below code works. I would think variable 'ro' in client represent
> a proxy. So on the server side, the class definiton probably need to
> include DRbUndump. Can anyone explain to my confusion?

This is exactly right.  DRbUndumped forces the creation of a proxy  
object on the client.

> # client
> require 'drb'
> DRb.start_service
> ro = DRbObject.new(nil, 'druby://localhost:7777')
> print ro.songname
>
> #server
> #!/usr/local/bin/ruby
> require 'drb'
>
> class SongNameServer
>     def initialize(str)
>         @filename = str
>     end
>     def songname
>         f = File.new(@filename)
>         return f.readline
>     end
> end
>
> DRb.start_service("druby://localhost:7777", SongNameServer.new("/tmp/
> songname"))
> puts DRb.uri
>
> DRb.thread.join
>

--
Poor workers blame their tools. Good workers build better tools. The
best workers get their tools to do the work for them. -- Syndicate Wars