On Thu, Aug 11, 2022 at 2:37 PM Robert Engels <reng...@ix.netcom.com> wrote:
> I don’t think that is relevant. It is very difficult to do chaining with > Go’s error model. You can pass a shared context to every node and store the > error in the context and protect against concurrent access. It’s doable but > not easy. > > Map/reduce and most functional patterns are easily represented using > chains. > > But like I said, I would use panic/recover in the framework to make it > easier. > I recently worked on a concurrent data pipeline to process a stream of data packages. Error handling was done with an error channel. Each stage of the pipeline had to prepare an error message capturing the current context, cause of the error, etc., and then write to the error channel before processing the next entry. > > > > On Aug 11, 2022, at 3:27 PM, Jan Mercl <0xj...@gmail.com> wrote: > > > > > On Thu, Aug 11, 2022, 21:36 Robert Engels <reng...@ix.netcom.com> wrote: > >> I’d say it certainly highlights a problem with Go’s error model. >> Exceptions would fit nicely here - instead it seems you needed to ignore >> all error handling - because chaining is impossible with error returns. >> > > It's okay if someone prefers the way Java does things, but the best thing > about Go is IMHO that it is not Java. And I still hope it stays away from > becoming Java as long as possible. > > >> A streams api with panic/recover is needed. >> >> On Aug 11, 2022, at 12:55 PM, K. Alex Mills <k.alex.mi...@gmail.com> >> wrote: >> >> >> Hello Gophers, >> >> I recently had an opportunity to try out Go generics on a small >> pipelines package >> <https://pkg.go.dev/github.com/splunk/go-genlib/pipelines>, along with >> some of my coworkers. >> >> The overall goal of this package is to provide helpers for separating >> concurrency from the core logic of the computation. The result was intended >> for I/O bound computations, and so it's likely inappropriate for managing >> short-lived goroutines. It takes a functional programming approach, >> providing helpers with familiar names seen in other APIs like Map, FlatMap, >> OptionMap, etc. One feature which I am particularly happy with is that >> concurrency concerns like worker pool size and channel buffers are >> configurable with minimal disruption to the rest of the code. >> >> Take a look at the library >> <https://pkg.go.dev/github.com/splunk/go-genlib/pipelines> and its >> accompanying blog post <https://kalexmills.com/journal/pipelines/>. I'm >> open to any of your thoughts, suggestions, and issue reports. >> >> Sincerely, >> >> K. 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