On 06/10/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> Many thanks for your answer. Suppose I want to create two rows for two
> different tables in a single SNMPSET request. But the handler (CREAT AND
> GO) for two different rows will be different. Suppose the second
> creation fails. Now how we can delete the first row? As execution of
> first handler is finished. Is there any way to return back to the first
> handler?
That's why the Net-SNMP agent uses a multi-pass approach to SET requests.
Please read the section on SET handling in the file AGENT.txt. This
refers to the old v4 MIB module API, but the basic model applies to
the v5 handler-based API as well.
Bottom line, the agent won't move from one pass to the next until
*ALL* the varbinds have been processed. So the agent will do
something like:
handle_table1( RESERVE1 );
handle_table2( RESERVE1 );
handle_table1( RESERVE2 );
handle_table2( RESERVE2 );
handle_table1( ACTION );
handle_table2( ACTION );
handle_table1( COMMIT );
handle_table2( COMMIT );
If any of these fail (say handle_table2(ACTION)), then the agent will
call *both* handlers with the appropriate failure mode:
handle_table1( UNDO );
handle_table2( UNDO );
That's where you'd need to take care of deleting the newly-created row again.
Which helper(s) are you using? Most of the automatically-generated
code ought to include the basic framework to do this.
Dave
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