Manifold basics in a nutshell.pdf

Manifold is a great library created by Zach Tellman. It provides a very powerful toolkit for asynchronous programming in Clojure. This tech talk is a high-level overview of manifolds main abstractions with examples of common use cases.

Transcript

1. Manifold basics in nutshell maksym.vovchuk@appsflyer.com
2. What is manifold? Manifold provides basic building blocks for asynchronous programming, and can be used as a translation layer between libraries which use similar but incompatible abstractions.
3. Manifolds main abstractions • deferred - represents a single asynchronous value. • stream - represents an ordered sequence of asynchronous values.
4. Deferreds
5. Deferreds You also can define a specific deferred:
6. Futures
7. What is Dirigiste? Dirigiste provides a fast, richly instrumented version of a java.util.concurrent.ExecutorService, and provides a means to feed that instrumentation into a control mechanism that can grow or shrink the pool as needed. Default implementations that optimize the pool size for thread utilization are provided.
8. Chaining deferreds
9. Catching exceptions in `d/chain`
10. [Deferred] -> Deferred<[]> transformation
11. [Deferred] -> Deferred<[]> transformation
12. What if I don’t like callbacks?
13. What if I don’t like callbacks? Looks BAD
14. What if I don’t like callbacks? Use `d/let-flow`!
15. Streams
16. Streams
17. Streams
18. Connecting streams
19. Would create a flow like: All messages from s2 and s3 would be propagated to s1.
20. Stream transformations Manifold provides wide variety of transformations which can be applied to streams: E.T.C
21. Event bus
22. Event bus This would create a flow model like:
23. Event bus
24. Event bus
25. Manifold as translation layer
26. Manifold as translation layer
27. Useful links: Zach Tellmans GH - https://github.com/ztellman/ Manifold rationale - https://aleph.io/manifold/rationale.html Manifold docs - https://aleph.io/codox/manifold/index.html Aleph docs - https://aleph.io/ Dirigiste - https://github.com/ztellman/dirigiste “Everything Will Flow” ZT talk - https://youtu.be/1bNOO3xxMc0
28. Outro: - Clojure is cool (don’t be afraid to use it). - Manifold is a pretty simple while efficient tool to write asynchronous code.
29. maksym.vovchuk@appsflyer.com
30. maksym.vovchuk@appsflyer.com Questions?