I asked a question on meta about hiding the "hot network questions" element on stackoverflow.com. One of the comment replies was that the "hot network questions" is basically a way for Stack Overflow to keep me on the site longer even to the point of distracting me from why I originally came here...
Hey guys, i've got a CQRS question that i think might potentially be a duplicate, but i couldnt find any questions here relating specifically to what i was facing, is there anyone else here with a working knowledge of cqrs?
So my general understanding is that 'Queries don't modify data' and 'Commands don't return data (aside from metadata). I'm in a situation where we have an exposed endpoint that does address lookups based on postcode, so is a clear candidate for a query. However because we do our lookups through a third party that costs us for each lookup. So what we do is we first look at the db for a cached copy, return that if it exists, or we go to the third party if our cached version is stale.
However, if we go to the third party for the lookup then we want to immediately cache the result to make sure any subsequent lookups dont cost. But this means that it is modifying data.
so this doesnt seem to be either a command or a query, by traditional definitions, and we dont want to seperate the lookup from the save because we never want it to be possible to do a lookup without recaching, as this would be expensive
am i approaching this from the wrong angle, or missing something obvious?
@SimonForsberg That's the view i was taking to it, though i was quite liberal with the word caching, as its essentially just updating the db record with the latest information, and i wasnt sure what side of the 'is or isnt modification' line that that fell
do you think that would be an ontopic question to ask on this site?
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