3.0.0-RC0 release preparations #6536

Version 3.0.0-RC0 - June 25, 2019 (Maven)

This is an early release for 3.0.0 to verify the release process still works for the new artifact location.

This release note does not detail the changes since 2.2.x. Please check out the wiki page What's different in 3.0 from time to time for the details and migration guide.

API changes

• Add eager truncation to bounded replay() to avoid item retention (3.x: Add eager truncation to bounded replay() to avoid item retention #6532)
• Add X.fromSupplier() (3.x: Add X.fromSupplier() #6529)
• Add concatMap with Scheduler guaranteeing where the mapper function runs (3.x: Add concatMap with Scheduler guaranteeing where the mapper runs #6538)
• Add startWithItem & startWithIterable (3.x: disambiguate startWith+1 to startWithItem & startWithIterable #6530)
• ConnectableFlowable/ConnetableFlowable redesign (3.x: ConnectableFlowable/ConnetableObservabe redesign #6519)
• Merge as() into to() (3.x: Merge as() into to() #6514)
• Change Maybe.defaultIfEmpty() to return Single (3.x: Various small API changes and removals #6517)
• Widen functional interface throws, replace Callable with Supplier in operator signatures (3.x: Widen functional interface throws, replace Callable with Supplier #6511)
• Promote Beta/Experimental operators to Standard (3.x: Promote Beta/Experimental to Standard #6537)
• Remove getValues() from some subjects/processors (3.x: remove getValues() from some subjects/processors #6516)
• Remove methods from test consumers, make internal versions (3.x: Remove methods from test consumers, make internal versions #6526)
• Remove replay(Scheduler) and its overloads (3.x: remove no-arg dematerialize(); remove replay(Scheduler) variants #6539)
• Remove dematerialize() (3.x: remove no-arg dematerialize(); remove replay(Scheduler) variants #6539)
• Remove startWith(T|Iterable) (3.x: disambiguate startWith+1 to startWithItem & startWithIterable #6530)
• Remove as() (3.x: Merge as() into to() #6514)
• Remove Maybe.toSingle(T) (3.x: Various small API changes and removals #6517)
• Remove Flowable.subscribe(4 args) (3.x: Various small API changes and removals #6517)
• Remove Observable.subscribe(4 args) (3.x: Various small API changes and removals #6517)
• Remove Single.toCompletable() (3.x: Various small API changes and removals #6517)
• Remove Completable.blockingGet() (3.x: Various small API changes and removals #6517)

Behavior changes

• Make using() resource disposal order consistent with eager-mode (3.x: Make using() resource disposal order consistent with eager-mode #6534)
• ConnectableFlowable/ConnetableFlowable redesign (3.x: ConnectableFlowable/ConnetableObservabe redesign #6519)
• Add eager truncation to bounded replay() to avoid item retention (3.x: Add eager truncation to bounded replay() to avoid item retention #6532)

Bugfixes

• Fix concatMapDelayError not continuing on fused inner source crash (3.x: Fix concatMapDelayError not continuing on fused inner source crash #6523)
• Sync up with 2.2.10 snapshot (3.x: Sync up with 2.2.10 snapshot #6507)
• Merge in changes from 2.x since the initial branching (3.x: Merge in changes from 2.x since the initial branching #6498)

Documentation enhancements

• Clarify create emitters are per consumer (3.x: JavaDocs: clarify create emitters are per consumer #6535)
• Add marbles to X.fromSupplier (3.x: add marbles to X.fromSupplier #6531)
• Sync up with 2.2.10 snapshot (3.x: Sync up with 2.2.10 snapshot #6507)
• Merge in changes from 2.x since the initial branching (3.x: Merge in changes from 2.x since the initial branching #6498)

Other

• Remove Changes.md (3.x: Remove Changes.md #6533)
• Remove test from testXXX method names, create a validator (3.x: remove test from testXXX method names, create a validator #6525)
• Sync up with 2.2.10 snapshot (3.x: Sync up with 2.2.10 snapshot #6507)
• Merge in changes from 2.x since the initial branching (3.x: Merge in changes from 2.x since the initial branching #6498)