I did something like this here:
https://github.com/brunoga/workerpool
I do not store the context anywhere, I pass it to my Start() method and it
passes it down to any place I need it.
On Fri, Feb 16, 2018 at 1:05 PM andrey mirtchovski <mirtchov...@gmail.com>
wrote:
> While trying to retrofit context.Context within a
> worker-pool-patterned package, where work is sent down a channel to be
> picked up by number of worker goroutines.
>
> I'm running against the mantra of "Do not store Contexts inside a struct
> type".
>
> For example, I want to put a timeout on the amount of time spent
> waiting to write on a channel, plus the time it takes for my write to
> be consumed on the other end (the time the requests spends enqueued on
> the channel buffer). How would I go about doing that without embedding
> a context.Context inside my write?
>
> A typical example, here is how i would do it without the channel send:
>
> func p(ctx context.Context, req Request) {
> ctx, _ = context.WithTimeout(ctx, Timeout)
> select {
> case <-ctx.Done:
> // timed out
> default:
> worker(ctx, req) // will use ctx to determine if timeout expired
> }
> }
>
> With a channel I may do something like:
>
> func c(req Request, in chan Request) {
> in <- req
> <-out
> }
>
> func worker(in chan Request) {
> for _, v := range in {
> // i want to cancel here if 'v' has lived past its timeout
> // or do work if not
> }
> }
>
> And I want to have a meaningful way to measure enqueue time before req
> is consumed by a worker in the second example.
>
> Hopefully that makes sense.
>
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