R?f. : object inheritance p roblem

[Irina Liakh]

On Tue, Feb 25, 2003 at 03:53:27PM +0100, marc.brun wrote:
> Marc BRUN at MAIF
> 25/02/2003 15:53
> 
> 
> 
> 
> To:     spell at itl.ua @ INTERNET
> cc:      
> 
> 
> Subject:        R?f. : [Nagios-users] object inheritance problem  
> 
> 
> 
> 
> 
> 
> Well, sorry I can't answer technically to your question...
> 
> But I think that what you try to do is against the inheritance
> approach. The son has his father's properties *plus* some
> specificities. You do the contrary.

sorry, but I disagree.
As I understand the idea of object inheritance at all,
and nagios object inheritance in particular (this is
unambiguously described in Nagios documentation),
locally defined variables *override* values, defined in parent,
and *not* *append*.
So, I consider justly my wish to override previously defined
variable with an empty value.


> 
> Anyway, give me your exemple, it could help.

Please.

define host{
	name		generic-host
	parents		xxx
	register	0
}

define host{
	use		generic-host
	host_name	xxx
}

define host{
	use		generic-host
	host_name	aaa
}


I need to exclude parent "xxx" from definition of host xxx.

> 
> Have fun.
> Marc

Thank you for help.

> 
> 
> I've encountered some problem with writing
> config files using object inheritance approach.
> 
> The problem is:
> I have prepared some template object,
> and other object inherits the former one.
> In latter object, I need to redefine some variable to "empty" value
> while this variable is defined as some nonempty value in template.
> 
> Simple putting variable name without value renders a parsing error.
> 
> How can I resolve my problem by means of object inheritance approach,
> or is there any workaround if former not possible?
> 
> 
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