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| eeicmui at eei.ericsson.s |
 Posted: Fri Aug 06, 1999 9:36 am |
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Guest
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Hi,
I have a doubt about the Atomic SET transaction mechanism
in the SNMP agent.
Suppose I want to modify multiple rows in a single
SET request. I then must write is_set_ok, and undo
operations for this table, right?
The sequence will be:
* For each row call is_set_ok.
* If any one of them returns {error, Column}, then call
undo for each of the previous ones and return error to Manager.
* If all succeed, return success.
Pls. let me know if I'm correct.
tia,
Chandru
--
Random Wodehouse Quote
Jeeves lugged my purple socks out of the drawer as if he were a
vegetarian fishing a caterpillar out of his salad.
Jeeves and the Chump Cyril, My Man Jeeves, 1919
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| mbj at bluetail.com |
| Posted: Mon Aug 16, 1999 7:12 am |
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Guest
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Chandrashekhar <eeicmui_at_eei.ericsson.se> wrote:
> Hi,
>
> I have a doubt about the Atomic SET transaction mechanism
> in the SNMP agent.
> Suppose I want to modify multiple rows in a single
> SET request. I then must write is_set_ok, and undo
> operations for this table, right?
Right. But unless the is_set_ok function modifies some state, you
don't need the undo function.
> The sequence will be:
> * For each row call is_set_ok.
> * If any one of them returns {error, Column}, then call
> undo for each of the previous ones and return error to Manager.
> * If all succeed, return success.
>
> Pls. let me know if I'm correct.
This is correct.
However, there is an (undocumented) feature you can use to change this
behaviour. Which SET transaction mechanism to use is configurable -
you can write your own set mechanism if you don't like the default
one. Check the code for details.
/martin
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