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Identifying Objects

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Robert Bruce Carleton-4

Identifying Objects

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I have an application where I escalate alert instances up through an instance hierarchy. This is probably a FAQ, but I'd like to clearly identify the instances that generate these alerts. Is there some kind of message I can run on an instance, to retrieve an identifier, that can be stored in the alert?

TIA,

--Bruce

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Tim Felgentreff

Re: Identifying Objects

On 03/29/2012 04:12 AM, Robert Carleton wrote:
> I have an application where I escalate alert instances up through an instance hierarchy. This is probably a FAQ, but I'd like to clearly identify the instances that generate these alerts. Is there some kind of message I can run on an instance, to retrieve an identifier, that can be stored in the alert?
>
> TIA,
>
> --Bruce
>
>

Not sure what you mean, if the object id works for you, send #asOop

Bert Freudenberg

Re: Identifying Objects

In reply to this post by Robert Bruce Carleton-4

On 29.03.2012, at 04:12, Robert Carleton wrote:
> I have an application where I escalate alert instances up through an instance hierarchy. This is probably a FAQ, but I'd like to clearly identify the instances that generate these alerts. Is there some kind of message I can run on an instance, to retrieve an identifier, that can be stored in the alert?
>
> TIA,
>
> --Bruce

Why not keep a reference to the instance itself?

- Bert -

Robert Bruce Carleton-4

Re: Identifying Objects

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On Mar 29, 2012, at 7:59 AM, Bert Freudenberg wrote:

> On 29.03.2012, at 04:12, Robert Carleton wrote:
>> I have an application where I escalate alert instances up through an instance hierarchy. This is probably a FAQ, but I'd like to clearly identify the instances that generate these alerts. Is there some kind of message I can run on an instance, to retrieve an identifier, that can be stored in the alert?
>>
>> TIA,
>>
>> --Bruce
>
>
> Why not keep a reference to the instance itself?
>
> - Bert -
>
>
>

Coincidentally, I was just testing that.

Thanks,

--Bruce

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Levente Uzonyi-2

Re: Identifying Objects

In reply to this post by Tim Felgentreff

On Thu, 29 Mar 2012, Tim Felgentreff wrote:

> On 03/29/2012 04:12 AM, Robert Carleton wrote:
>> I have an application where I escalate alert instances up through an instance hierarchy. This is probably a FAQ, but I'd like to clearly identify the instances that generate these alerts. Is there some kind of message I can run on an instance, to retrieve an identifier, that can be stored in the alert?
>>
>> TIA,
>>
>> --Bruce
>>
>>
>
> Not sure what you mean, if the object id works for you, send #asOop
>
>

It's not a good idea to use #asOop in Squeak, since there is no unique and
immutable identifier of the objects. This method works great (except for
the case when #become: is being used) for smalltalks which use an object
table.
As others suggested, using the object itself (optionally wrapped in a
WeakArray) is the best solution.

Levente

Robert Bruce Carleton-4

Re: Identifying Objects

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On Mar 30, 2012, at 5:33 AM, Levente Uzonyi wrote:

> On Thu, 29 Mar 2012, Tim Felgentreff wrote:
>
>> On 03/29/2012 04:12 AM, Robert Carleton wrote:
>>> I have an application where I escalate alert instances up through an instance hierarchy. This is probably a FAQ, but I'd like to clearly identify the instances that generate these alerts. Is there some kind of message I can run on an instance, to retrieve an identifier, that can be stored in the alert?
>>>
>>> TIA,
>>>
>>> --Bruce
>>>
>>>
>>
>> Not sure what you mean, if the object id works for you, send #asOop
>>
>>
>
> It's not a good idea to use #asOop in Squeak, since there is no unique and
> immutable identifier of the objects. This method works great (except for the case when #become: is being used) for smalltalks which use an object table.
> As others suggested, using the object itself (optionally wrapped in a WeakArray) is the best solution.
>
>
> Levente

Levente,

Thanks for your comments. I went with using a reference to the instance. That works for my application.

Best,

--Bruce

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