September 2018
Intermediate to advanced
398 pages
9h 43m
English
Content preview from Scala Programming Projects
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Implementing processRepeatedly
We are now ready to implement the algorithm of our BatchProducer application, which will loop repeatedly over processOneBatch. We are not going to write an integration test for it, as it merely assembles other parts that have been tested. Ideally, in a production system, you should write an end-to-end test that would start the application and connect to a fake REST server.
Here is the implementation of processRepeatedly:
def processRepeatedly(initialJsonTxs: IO[Dataset[Transaction]], jsonTxs: IO[Dataset[Transaction]]) (implicit appContext: AppContext): IO[Unit] = { import appContext._ for { beforeRead <- currentInstant firstEnd = beforeRead.minusSeconds(ApiLag.toSeconds) firstTxs <- initialJsonTxs firstStart ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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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.