Hey Glenn,
For something this complex I think an event emitter may be better suited.
--
Pedro
On Monday, February 25, 2013 at 9:57 AM, Glenn Block wrote:
> Hello all
>
> Let's assume you have an API that results in a batch of HTTP calls which fire
> async and which are not sequential. A constraint of the API is that any
> errors that occur during the calls need to get returned to the user.
>
> How have you customarily designed this?
>
> One idea was something like the following
>
> function send(message, callback) {
> }
>
> where callback is function(error, results) {
> }
>
> In this case error if not null is a JSON object with a collection of child
> objects with the errors.
>
> An alternative idea I had was to have an additional completion callback per
> item.
>
> so:
>
> function send(message, completionCallback, itemCallback) {
> }
>
> This introduces a callback for each item that is processed. In this case the
> completion callback has a single error if ANY errors occur while the
> itemCallback has individual errors as they occur.
>
> This is useful for cases where you might want to stop further processing if
> the number of errors is very high.
>
> Thoughts / Experiences?
> Glenn
>
>
>
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