004: The RxJava show with Dan Lew (Part 2)

In this episode of Fragmented, Donn and Kaushik continue their conversation with Dan Lew on RxJava. In the final part of this 2 part series, they talk about many useful RxJava operators and other intricacies of using RxJava in Android.

Show Notes

RxJava Operators:

• Observable.just [reactivex.io]
• Observable.from [reactivex.io]
• Observable.defer [reactivex.io]
  • Using defer to handle “Old, Slow Code” [blog.danlew.net]
• Observable.map [reactivex.io]
• Observable.flatmap [reactivex.io]
  • map vs flatmap (alchemist and cheese shredding analogy [reddit])
• Observable.zip [reactivex.io]
• Observable.combineLatest [reactivex.io]
• Observable. switchMap [reactivex.io]
• Observable.distinctUntilChanged [reactivex.io]
• Observable.lift explanation [reactivex.io]
• Observable.compose
  • Don’t break the chain (using compose) [blog.danlew.net]
• Observable.filter [reactivex.io]
• Observable.take [reactivex.io]
• subscribeOn vs observeOn [stackoverflow.com]
• Understanding debounce, buffer, debouncedBuffer [nerds.weddingpartyapp.com]

RxJava Components:

• Subjects: when is it appropriate to use [.net but still applies][davesexton.com][19](http://davesexton.com/blog/post/To-Use-Subject-Or-Not-To-Use-Subject.aspx)]
• Implementing an event bus using RxJava [nerds.weddingpartyapp.com]
• RxJava plugins [github.com]
  • RxJavaDebug plugin - for hooking to start/end/error [github.com]
• .toBlocking() [reactivx.io]
• Composite Subscriptions [reactivex.io]

Retrolambda

• Retrolambda library [github.com]
• Retrolambda gradle plugin [github.com]
• Common Issue with Retrolambda (NoClassDefFoundError) [github.com]

Hot  vs Cold observables - From the RxJs wiki [github.com]

• uses js instead of java, but concepts are the same and this is the best explanation I’ve found so far.

RxJava wiki on Backpressure [github.com]:

• Ring buffer size: System.setProperty("rx.ring-buffer.size", "128");
• Issue with changing buffer ring size [github.com]
• It’s 16 on Android, down from 1024 originally. :P So it’s actually 64x smaller.

Awesome picks:

Dan Lew:

• Simple Made Easy (talk by Rich Hickey creator of Clojure) [infohq]
• Victor by Trello (SVG assets) [github.com]

Donn:

• Realm Object Database [realm.io]

Kaushik:

• Therapeutic Refactoring (talk by Katrina Owen) [youtube.com]

Contact

Dan Lew

• @danlew42 [twitter.com]
• Dan Lew’s blog [danlew.net]

Donn Felker

• @donnfelker [twitter.com]
• donnfelker.com

Kaushik Gopal

• @kaushikgopal [twitter.com]
• kaush.co