From: michael.moen@...
Date: 2006-07-26T00:50:07+09:00
Subject: Re: druby - How to close connection from client?

Martin Boese wrote:
> I need to disconnect explicitly from a druby client.
>
> My code is like:
>
> DRb.start_service
> @drb = DRbObject.new(nil, 'druby://localhost:7777')
> @drb.dosomething(param1, param2, param3)
> ..(here I'd like to disconnect!!)...
>
>
> Background:
> I am using druby to communicate between a Rails application running on
> lighttpd/FreeBSD6 and a server-script running on the same box with different
> user rights.

Martin- I'm doing something similar but using Rinda as a middle man.
What I did was create a singleton class to handle the conenction, one
connection stays open and gets reused.

Here's what the client looks like.

#!/usr/bin/env ruby -w

require 'rinda/ring'
require 'uuidtools'
require 'rinda'
require 'search_result'

class SearchClient
  private_class_method :new
  @@tuple_space = nil

  def self.create
    if @@tuple_space.nil?
      DRb.start_service
      @@tuple_space = Rinda::TupleSpaceProxy.new(DRbObject.new(nil,
RINDA_MASTER))
    end
    @@tuple_space
  end

  def self.user_search(opts)
    retries = 0
    begin
      opts[:uuid] = UUID.random_create.to_s
      puts "outgoing => uuid: #{opts[:uuid]}\nopts: #{opts}"
      SearchClient.create.write([:UserSearch, DRb.uri, opts],
RINDA_TIMEOUT)
      tuple = SearchClient.create.take([:UserSearchResults,
opts[:uuid], nil], RINDA_TIMEOUT)
      SearchResult.new tuple[2]
    rescue DRb::DRbConnError
      # handle connection closed
    rescue
      @@tuple_space = nil
      raise 'Connection Error'
    end
  end
end