Reactive streams started as an initiative to provide a standard of handling data streams in an asynchronous mode by regulating the push of the data using back-pressure. The original site of the project is http://www.reactive-streams.org/.

Reactive streams are now implemented in JDK 9 in the java.util.concurrent package.

The aim of the definition of reactive streams is to define the interface that can handle the propagation of the generated data in a totally asynchronous way without the need on the receiving side to buffer the unlimited created data. When data is created in a stream and is made available to be worked on the worker that gets the data, has to be fast enough to handle all the data that is generated. The capacity should be high enough to handle the highest production. Some intermediate buffers may handle peaks, but if there is no control that stops or delays production when the consumer is at the top of its capacity, the system will fail. Reactive system interfaces...