From: Eric Hodel <drbrain@...7.net>
Date: 2005-08-26T17:08:27+09:00
Subject: Re: DRb functions disappearing?

On 26 Aug 2005, at 00:32, Kevin Brown wrote:

> On Friday 26 August 2005 01:14, Eric Hodel wrote:
>
>> On 25 Aug 2005, at 21:49, Kevin Brown wrote:
>>
>>> Here's the output:
>>>
>>> (druby://localhost:9000) ./db/db.rb:999:in `login': undefined
>>> method `login'
>>> for #<DRb::DRbUnknown:0xb72c2fec> (NoMethodError)
>>>
>>
>> ^^^
>> Looks like you're missing a DRbUndumped somewhere.
>>
>> How about some code?
>>
>
> Your wish is my command.
>
> Here's the backend code:
> --START--
> require 'db/db'
> require 'listener'
> require 'drb'
>
> # Initialize Database Connection
> db = DB.new
>
> # Start Listener
> listener = Listener.new(db)
> listener.extend DRb::DRbUndumped
> DRb.start_service('druby://localhost:9000', listener)
>
> puts "DLI server is up and running...\n"
>
> DRb.thread.join
> --END--
>
> DB is a database abstraction layer, listener maps calls to it, only  
> allowing
> access to login for now.
>
> Here's listener, not like it matters much:

The listener isn't involved in the failure, right?

> --START--
> require 'db/db'
> require 'thread'
>
> class Listener
>
>   def initialize(db)
>     @db = db
>     @mutex = Mutex.new
>   end
>
>   def login(user)
>     @db.login(user)
>   end
> end
> --END--
>
> And the client code is in a KDE app, so I won't bore you all with  
> the pile
> there:
> --START--
> require 'Korundum'
> require 'drb'
> require 'errors'
> require 'login'

I don't see require 'db/db' here, so you'll need to add 'include  
DRbUndumped' to db/db if you don't want db/db to live here.

> class Dli < KDE::MainWindow
>   attr_reader :connection
>
>   slots    'newUser()'
>
>   def initialize(name)
>     super(nil, name)
>
>     # Prepare messenger to get to backend.
>     DRb.start_service()
>     @connection = DRbObject.new(nil, 'druby://localhost:9000')
>     user = User.new
>     @connection.login(user)
> --END--
> The connection.login is the "disappearing" method...  And that's  
> all the code
> that has to do with that. :-)
>
> Thanks for the quick reply!
>

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