From: Eric Hodel <drbrain@...7.net>
Date: 2005-08-17T05:27:31+09:00
Subject: Re: drb client-side proxies

On 16 Aug 2005, at 09:15, Mark Volkmann wrote:

> On 8/15/05, Eric Hodel <drbrain@segment7.net> wrote:
>
>> On 14 Aug 2005, at 12:40, Mark Volkmann wrote:
>>
>>
>>> The source file lib\ruby\1.8\drb\drb.rb defines the class  
>>> DRbObject. I
>>> don't understand the initialize method. Why would I ever want to  
>>> pass
>>> something other than nil for the first parameter? The comment above
>>> the initialize method says that is used to create a proxy/stub for a
>>> local object. Why would I want to do that?
>>>
>>> The typical way to use this is
>>>
>>> proxy = DRbObject.new(nil, url)
>>
>> You can pass DRbObjects across the wire, so you could wrap a local
>> object and pass the DRbObject across the wire to the other side.  If
>> you look around in drb.rb you'll see several places where it is used.
>
> Are you saying that this is a way to force a pass by reference?
> I can also do that with DRbUndumped.
> Are these blocks of code equivalent in what they accomplish?
>
> obj.extend DRbUndumped
> remote_obj.some_method(obj)
>
> remote_obj.some_method(DRbObject.new(obj))

Yes.

DRbUndumped overrides _dump which causes a DRbObject to be created  
wrapping obj.

-- 
Eric Hodel - drbrain@segment7.net - http://segment7.net
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