July 2021
Intermediate to advanced
176 pages
4h 14m
English
Content preview from Concurrent Data Processing in ElixirBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Introducing GenStage
GenStage was originally developed by José Valim, the creator of Elixir, and released in July 2016. As he described it in the official announcement:
“GenStage is a new Elixir behaviour for exchanging events with back-pressure between Elixir processes.”
In the previous chapter, we used the GenServer behaviour to build long-running server processes. The GenStage behaviour, as its name suggests, is used to build stages. Stages are also Elixir processes and they’re our building blocks for creating data-processing pipelines.
Stages are simple but very powerful. They can receive events and use them to do some useful work. They can also send events to the next stage in the pipeline. You can do that by connecting stages to each ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.