Summary of Intro To Reactor Core | Baeldung

• The article starts by introducing the reader to the Reactor Core library and its role in enabling reactive programming in Java. It emphasizes that while Java 8 Stream API provides similar functionality, they are not identical and might require some adjustments when transitioning from one to another.
• It then explains the Reactive Streams Specification, highlighting how Reactor implements it and provides a foundation for understanding the library's workings.
• The next section demonstrates adding Maven dependencies for Reactor and Logback-classic, ensuring proper logging for better understanding the flow of data.
• The article continues by showing how to produce a stream of data using Flux and Mono, explaining their roles and providing examples of creating simple streams.
• It then discusses subscribing to a stream and collecting elements, showcasing the log output to visualize the flow of data. The article also explains theSubscriber interface and provides a custom implementation to demonstrate the different stages of the flow.
• A comparison is made between Reactive and Java 8 Streams, emphasizing the push model of Reactive versus the pull model of Streams. It also mentions the concept of backpressure, where subscribers can control the amount of data received from an upstream.
• The article then explores operating on a stream, including mapping data and combining multiple streams using the zip() function. It provides examples and explains how these operations can be applied to react to incoming events.
• Later, it discusses hot streams, which are infinite and always running, in contrast to cold streams that have a fixed length. It introduces ConnectableFlux, which allows creating hot streams by converting cold ones. Throttling is also covered, showing how to control the rate at which data is pushed to subscribers.
• Concurrency is another important aspect addressed in the article. It demonstrates how to run code on different threads using the Schedule interface and provides examples of subscribing on a parallel thread.
• Finally, the conclusion summarizes the key points covered in the article and directs readers to further resources for more advanced topics and applications of Reactor Core.