[Update] Following our Reactor 2.5 introduction, we shifted the version to 3.0 to reflect better the major redesign effort overtaken. A meaningful composition API The former reactor-stream module has been merged into Reactor Core 3.0. Flux and Mono respectively representing 0..N and 0..1 sequence types now cover a solid range of operations for the following categories: Cold-to-Hot or Multicasting : publish, publishNext, cache, multicast... Aggregating/Reducing (Transforming) : buffer, reduce, scan, window, sample... Filtering : filter, exists, single... Conditioning : timeout, take, takeUntil…

Entering Reactive Streams Era Reactor 2.0 development started by the end of 2014, around the same time as Reactive Streams. We were keen on joining the effort and early adopt a backpressure protocol to mitigate our main message-passing limitation: bounded capacity. We delivered in Reactor 2.0 the first attempt to make Reactive Streams implementations of RingBuffer-based schedulers and derived an increasingly popular reactive pattern: Reactive Extensions. Meanwhile, Reactive Streams started getting traction and an entire ecosystem of libraries discussed this transition. The regular concern…