Page History

...

Before using DCAE SDK, please take a moment and read Project Reactor documentation and . You should also skim through methods available in Flux and Mono. It can save you many wasted minutes/hours of thinking how to implement the functionality by your own instead of using already implemented method.

Some general notes:

• Do not block in any of handlers which are passed to operators defined by Reactor. The library uses few Schedulers (think thread-pools) which are suitable for different jobs. More details can be found in the documentation. If possible try to use non-blocking APIs.
• Most of operators support back-pressure. That means that a demand for new messages will be signalized from downstream subscribers. For instance if you have a flux.flatMap(this::doThis).map(this::doThat).subscribe() then if doThis is very slow it will not request many items from source flux and it will emit items at it's own pace for doThat to process. So usually there will be no buffering nor blocking needed between flux and doThis.
• (Almost) nothing will happen without subscribing to the Flux/Mono. These reactive streams are lazy, so the demand will be signaled only when subscription is being made ie. by means of subscribe or block* methods.
• If you are going to go fully-reactive then you should probably not call subscribe/block anywhere in your code. For instance, when using Reactor Netty or Spring Web Flux you should return Mono/Flux from your core methods and it will be subscribed somewhere by the library you are using.

...