From: Johnny Morrice <spoon@...>
Date: 2011-04-05T22:43:14+09:00
Subject: Re: Seeking advice

On Tue, 5 Apr 2011 22:22:17 +0900
Alex Rothbard <alex323@gmail.com> wrote:

> What is the best way to allow the user of the library to specify a
> transport at runtime? 

Use factory pattern

The user should call something like

MyProject::Transport::ThriftFactory.build

Then they don't need to find the transport themselves.
But it should be obvious what ThriftFactory returns.

The following might be how you would do it, up to you really :)

# I don't know what this is about, so I'm calling your class Foo here
class Foo

   # My Foo transports all the data to the yard
   def initialize(transport)
      @t = transport
      @grid = @t::Grid.new
    end

end

# Factory to build the Foo which uses the Thrift Transporter
class ThriftFactory

   # Users can make Foos that transport with Thrift without having to
   # find the Thrift themselves
   def build
      Foo.new MyProject::Transport::Thrift
   end

end