Norman Rädke <[email protected]> writes:

> In order to resolve this problem i need a shadow copy of table columns
> after successfull read by client application. If the 'live_counter'
> called i inform every collumn and calculate the new value as followed:
>
> new_value = act_value - shadow_value; shadow_value = 0;

There is various types of caching that might be able to help you, but it
would be easiest to create your own rather than use a full stash_cache,
though you certainly could.

But the real issue is that the design of "when this variable is read, do
something" isn't safe.  Consider the case where the manager sends the
GET request, the column is read and the RESPONSE is sent back to the
manager.  But is dropped along the way, so the manager re-issues the GET
request and the results are now affected.

You should probably be using a 'SET' to reset things instead.
-- 
Wes Hardaker
SPARTA, Inc.

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