RxJava v3.0.0-RC2 Release Notes
Release Date: 2019-08-20 // over 4 years ago-
๐ Version 3.0.0-RC2 - August 20, 2019 (Maven)
๐ This is an early release for 3.0.0 to allow preparations for the breaking API changes and cleanups.
Please check out the wiki page What's different in 3.0 from time to time for the details and migration guide.
Major change
๐ฆ After considering several factors, the components of RxJava 3 have been moved to a new base package to avoid class file conflicts due to having v2 and v3 in the same project. The new base package is
io.reactivex.rxjava3
and the base types will live inio.reactivex.rxjava3.core
:Name v2 v3 ๐ฆ Base package io.reactivex
Flowable
io.reactivex.Flowable
io.reactivex.rxjava3.core.Flowable
PublishSubject
io.reactivex.subjects.PublishSubject
io.reactivex.rxjava3.subjects.PublishSubject
ConnectableObservable
io.reactivex.observables.ConnectableObservable
io.reactivex.rxjava3.observables.ConnectableObservable
Function
io.reactivex.functions.Function
io.reactivex.rxjava3.functions.Function
etc. Flowable
s of the two versions can talk to each other without bridges because both implement the Reactive Streams' interfaces such asPublisher
:io.reactivex.Flowable.range(1, 10) .flatMap(v -\> io.reactivex.rxjava3.core.Flowable.just(v \* 10)) .subscribeWith(new io.reactivex.rxjava3.subscribers.TestSubscriber\<\>()) .assertResult(10, 20, 30, 40, 50, 60, 70, 80, 90, 100);
The other reactive types do not share such base interfaces (they have their own respective copies) and will require bridges, likely provided via 3rd party libraries as with v1->v2 or v1->v3 bridges.
Dependency changes
- โฌ๏ธ Upgrade to Reactive Streams 1.0.3-RC1 (#6621)
API changes
- Widen throws on the
XOnSubscribe
interfaces (#6579)
Behavior changes
- Constrain upstream requests of
elementAt
andfirst
operators (#6620)
๐ Bugfixes
- ๐ Fix
switchMaps
inconsistency swallowing errors when cancelled (#6572) - ๐ Fix
ObservableBlockingSubscribe
compares TERMINATED with wrong object (#6577) - ๐ Fix truncation bugs in
replay()
andReplaySubject
/Processor
(#6582) - ๐ Fix
mergeWith
not cancelling the other source if the main errors (#6598) - ๐ Fix
refCount
not resetting when termination triggers cross-cancel (#6609) - ๐ Fix many operators swallowing undeliverable exceptions (#6612)
- ๐ Fix
switchMap
incorrect sync-fusion & error management (#6616)
๐ Documentation enhancements
๐ No changes in this release.
Other