Useful Intro To Reactor Core | Baeldung

1. Introduction to Reactor Core: The article starts by introducing Reactor Core, a Java library that enables reactive programming. It explains how Reactor implements the Reactive Streams Specification, which standardizes how to build asynchronous and event-driven applications.
2. Producing a Stream of Data: It demonstrates how to produce a stream of data using Flux and Mono, providing examples and explaining their roles. This forms the basis for reacting to and processing events in a reactive application.
3. Subscribing and Collecting Elements: The article then discusses subscribing to a stream and collecting elements. It showcases the log output to visualize the flow of data and provides a custom Subscriber implementation to explain different stages of the data flow.
4. Mapping Data and Combining Streams: It covers operating on a stream, including mapping data using functions. Additionally, it demonstrates combining two streams using the zip() function, showing how to create more complex reactive behaviors.
5. Hot Streams and Throttling: The article introduces the concept of hot streams, which are infinite and always running. It also covers throttling, allowing control over the rate at which data is pushed to subscribers, helping manage resources and avoid overwhelming consumers.
6. Concurrency and Scheduling: It explores concurrency by demonstrating how to run code on different threads using the Schedule interface. This aspect enables parallel processing and improves the performance of reactive applications.
7. Conclusion and Further Resources: Finally, the conclusion summarizes the key points covered and directs readers to further resources for more advanced topics and practical applications of Reactor Core in Java projects.

In summary, this article provides a comprehensive overview of Reactor Core, including its basic concepts, stream production, subscription, data processing, handling hot streams, throttling, concurrency, and scheduling. It serves as a foundation for understanding how to build reactive applications using Reactor Core and sets the stage for further exploration into more advanced topics in reactive programming with Java.