From: Sausheong Chang <sausheong@...>
Date: 2009-12-09T23:39:45+09:00
Subject: Re: DRB class in array

Hi

I have a slightly different problem. I have an array stored in the 
object:

class Room
  include DRb::DRbUndumped
  attr_accessor :name
  attr_accessor :game
  attr_accessor :observers

  def initialize(name=nil)
    @game = nil
    @observers = []
    @name = name
  end
end

And the object is stored at the 'server'. At the 'client' I got the 
object and is able to modify the @name instance variable at the 
'server'. However when I tried to add objects to the @observers array it 
doesn't seem to appear at the 'server'. What could be wrong?


Brian Candler wrote:
> Master Marv wrote:
>> if a client modifies the status variable of a class instance in the
>> array it does not get changed.
>> 
>> dump = DRbObject.new nil, ARGV.shift
>> myclass = IEB_wrapper1.new
>> dump.push myclass
>> dump[0].status = "Hello"
>> p dump[0].status => results in "ready" not in "Hello"
>> 
>> how can i modify the status of my class in the array on the drb server?
> 
> class IEB_wrapper1
>   include DRbUndumped
> end
> 
> This means that instead of passing across a *copy* of the object (made 
> using Marshal.dump and load), it will pass across a DRb *proxy object*. 
> All operations made on that proxy are sent across as remote method calls 
> and therefore made on the server.
> 
> I wrote a document called "DrbTutorial" on rubygarden.org, which 
> unfortunately is long since gone. You might be able to find a cached 
> copy somewhere.

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