In this chapter, we looked at the various ways to add resilience to our application. First, we covered possible error scenarios involving the producer and the subscriber. Next, we looked at how Reactor performs error handling under each of those conditions. This enabled us to configure the required error handling in Reactor, by using the various operations that are offered. Reactor allows us to configure fallback values for the thrown exceptions by using onErrorReturn and onErrorResume operators. We also configured timeouts and retry machines, using the available operators, in order to generate timely responses. Finally, we configured error handling in WebClient. In a nutshell, we explored the possible ways to configure error handlers in Reactor.
Hands-On Reactive Programming with Reactor
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Hands-On Reactive Programming with Reactor
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Overview of this book
Reactor is an implementation of the Java 9 Reactive Streams specification, an API for asynchronous data processing. This specification is based on a reactive programming paradigm, enabling developers to build enterprise-grade, robust applications with reduced complexity and in less time. Hands-On Reactive Programming with Reactor shows you how Reactor works, as well as how to use it to develop reactive applications in Java.
The book begins with the fundamentals of Reactor and the role it plays in building effective applications. You will learn how to build fully non-blocking applications and will later be guided by the Publisher and Subscriber APIs. You will gain an understanding how to use two reactive composable APIs, Flux and Mono, which are used extensively to implement Reactive Extensions. All of these components are combined using various operations to build a complete solution.
In addition to this, you will get to grips with the Flow API and understand backpressure in order to control overruns. You will also study the use of Spring WebFlux, an extension of the Reactor framework for building microservices.
By the end of the book, you will have gained enough confidence to build reactive and scalable microservices.
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Current Title:
Hands-On Reactive Programming with Reactor
Table of Contents (13 chapters)
Preface
Free Chapter
Getting Started with Reactive Streams
The Publisher and Subscriber APIs in a Reactor
Data and Stream Processing
Processors
SpringWebFlux for Microservices
Dynamic Rendering
Flow Control and Backpressure
Handling Errors
Execution Control
Testing and Debugging
Assessments
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