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I need to expose an API A which internally uses another API B. API B accepts an array of product codes and returns their information. That array could have any length but API B will return information of only first 10 product codes and silently discard the rest, i.e. doesn't throw an exception or return an error.

Now while designing API A, how should I go about it? Should I also discard the extra elements silently or throw an exception or return partial information with an error?

I can also split the input in batches and call API B multiple times from API A but each call to API B has to wait for 1 second.

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    What do the clients of API A want? Correct but slow behavior, silent wrong behavior, or an error suggesting they try a smaller query? And maybe there's other choices, if implementation A caches some of API B's results.
    – Erik Eidt
    Commented Oct 15, 2016 at 22:12
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    I wish my customers thought defective code was good. I'd be thought a genius and get a pay raise.
    – radarbob
    Commented Oct 16, 2016 at 3:20

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