How to Write Controllable Futures in Scala | Rock the JVM

Written form to keep for later: blog.rockthejv...
This video is for the Scala programmers who are facing the problem of "manually" fulfilling Futures. I give the prototypical example of what happens in practice, when you have a multi-threaded service out of your control, yet you need to use it and extract a sensible API out of it.
I will introduce Promises, how they work, how they fit into the producer-consumer paradigm, and solve the problem at hand.
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[@Krazness]

I started an new job that uses Scala and your videos have helped me tremendously. Thank you

[@rockthejvm]

Glad to have played a small part!

[@vetiarvind]

jeez that was a mind trip for my smooth brain

[@anishkumar-uk6yr]

Feeling Good to see you here I have learned Scala bcz of you

[@mourikogoro9709]

Good tutorial again! But the implementation itself is too messy for just realizing a simple idea, "process a value from Future"?

[@rockthejvm]

The problem the video wants to show is how to deterministically fulfil a Future, not necessarily how to process it.

[@BogdanDimitriu]

This example for Promises seems slightly convoluted, but it eventually drives the idea home. Keep up the good work otherwise ;)

[@rockthejvm]

Glad it eventually clicked!

[@somdevpahari5165]

Hi Daniel, really helpful video. But I have one different scenario. Lets say, I have one batch process which is using Slick. Now by design Slick returns Future. If I want executes Futures in a sequential way and want the main method to wait until all the Futures are executed then what could be the best possible implementation. Right now I am using Await though. If anything other than using Await.

[@rockthejvm]

Use Future.traverse or Future.sequence.

[@jeronimogarcia-loygorri1125]

I can't make the code run and the link to the blog is broken. In the blog index there is this link, also broken (rockthejvm.com/blog/205441/conttrollable-futures). Any help will be appreciated
I learn a lot with you videos.
Thank you

[@d4devotion]

Things have gone very much confusing here Daniel, would have been better to take a simple example to explain why and where need to play with a promise manually.

[@rockthejvm]

That was the goal of the video :(

[@halildogan6435]

Hi Daniel, thanks for the video. I sent you an email regarding your udemy courses. Could you please check it when you have time?