ReactiveStreams has gained a lot of attention recently, especially because of its inclusion in JDK 9 in the Flow class.

A number of libraries have been written on top of ReactiveStreams that provide a functional-style API that makes asynchronous processing of a data stream very easy.
Notable examples of such libraries are RxJava 2 and Spring Reactor. ReactiveStreams provides a common API for all these libraries so that they are interoperable, and interoperable with any library that offers a ReactiveStreams API.

It is not uncommon that applications (especially REST applications) need to interact with a HTTP client to either consume or produce a stream of data. The typical example is an application making REST calls to a server and obtaining response content that needs to be transformed using ReactiveStreams APIs.

Another example is having a stream of data that you need to upload to a server using a REST call.

It’s evident that it would be great if there was a HTTP client that provides ReactiveStreams API, and this is what we have done with the Jetty ReactiveStreams HttpClient.

Maven coordinates:

The Jetty ReactiveStreams HttpClient is a tiny wrapper over Jetty’s HttpClient; Jetty’s HttpClient was already fully non-blocking and already had full support for backpressure, so wrapping it with the ReactiveStreams API was fairly simple.

You can find detailed usage examples at the project page on GitHub.

Jetty ReactiveStreams HTTP Client

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