akka/akka-core

add possibility to BroadcastHub to retry last N records for every new consumer

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#23,816 opened on Oct 17, 2017

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 (1 comment) (0 reactions) (0 assignees)Scala (3,547 forks)batch import
3 - in progresshelp wantedt:stream

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Description

BroadcastHub is a class to create a sink for a dynamic set of consumers. In my case speed of data publishing is not so fast and I should retry last N records to every new consumer, so users will see records in any time.

Contributor guide

Research direction
Study the BroadcastHub implementation in Akka Streams, understand how it manages consumers and buffers, then design a mechanism to replay the last N elements to new consumers.
Tech stack
scala
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
ScalaAkkaAkka Streams
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40