Add (Syntactic) Sugar To Your Java
Abstract: kaChing powers the largest social investment site on the web with nearly 500,000 registered users. Our mission is to make the investment world open by offering transparent investment vehicles that directly compete with mutual funds. Over the past year and a half, we have built a large feature set and evolved our software continuously with very short iterations and (almost) no regression. In this talk, I will present our experience building a large test-driven code base from the ground up. Using concrete examples, we will have a look at component based APIs, declarative programming, minimizing the concepts of an API, specific cases of separation of concern and interactions with third-party software. We will look at multiple programming paradigms from languages such as Scala, shell script and Prolog and see how these ideas can be embedded as syntactic sugar in your Java.
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Add (Syntactic) Sugar To Your Java
- 1. Add Sugar to your Java “ how we architected from the ground up for testability, and why” Pascal-Louis Perez – .com Pascal-Louis Perez, kaChing Group Inc. V SYNTACTIC
- 2. .com Pascal-Louis Perez, kaChing Group Inc.
- 3. our system in 30 seconds Pascal-Louis Perez, kaChing Group Inc.
- 7. Growing a Language Pascal-Louis Perez, kaChing Group Inc. expressiveness µ-Java 1 Do not take things for granted 2 Think outside the Language
- 9. It’s a lot of fun! Pascal-Louis Perez, kaChing Group Inc.
- 10. And it can be very geeky! Pascal-Louis Perez, kaChing Group Inc.
- 17. Shell’s “everything is a process” Pascal-Louis Perez, kaChing Group Inc. process stdin args stdout stderr return code
- 19. Queries Pascal-Louis Perez, kaChing Group Inc. query dependencies exception arguments value
- 23. QueryDriver Pascal-Louis Perez, kaChing Group Inc. @ query monitoring retrying transacting injecting scoping V LazyManager
- 35. … or maybe not Pascal-Louis Perez, kaChing Group Inc. portfolio(now, 90) .buyStock(now, "KO", 10, 1) .payInterest(later, fedRateRepository) .sellStock(latest, "KO", 10, 1) .get() what?
- 36. Find Managers Pascal-Louis Perez, kaChing Group Inc. order constraint
- 38. Practice Safe Programming: Use Types Pascal-Louis Perez, kaChing Group Inc. Selector createIndex : Index Index search( Constraint) Constraint getSelector : Selector
- 39. Practice Safe Programming: Use Types Pascal-Louis Perez, kaChing Group Inc. τ Selector <M> createIndex : Index <M> Index <M> search( Constraint <M> ) Constraint <M> getSelector : Selector <M>
- 40. Summary of the Examples Pascal-Louis Perez, kaChing Group Inc. τ @ dependency injection query constructors query driver thunk JsonMarshaller API paths parsing builder pattern family polymorphism ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ µ-Java ✓ what?
Notes de l'éditeur
- - syntactic sugar refers to convenience features implemented at the urface level of a programming language, for instance i++ in Java is a short hand for increment by 1 plus a cast or foreach added in Java 5 to avoid dealing with iterators directly -in our experience, many of the code we write is to some extent an extension of the language , basically creating a Domain Specific Language to solve a particular problem -talk about how we implemented things rather than what we implemented -cover multiple examples , including our platform the QueryEngine -effort of a whole team presented, many contributions and arguments about how things should be built