Clojure reactive programming : design and implement highly reusable reactive applications by integrating different frameworks with Clojure

Description

If you are a Clojure developer who is interested in using Reactive Programming to build asynchronous and concurrent applications, this book is for you. Knowledge of Clojure and Leiningen is required. Basic understanding of ClojureScript will be helpful for the web chapters, although it is not strictly necessary. Cover Copyright Credits About the Author Acknowledgments About the Reviewers www.PacktPub.com Table of Contents Preface Chapter 1: What is Reactive Programming? A taste of Reactive Programming Creating time More colors Making it reactive Exercise 1.1 A bit of history Dataflow programming Object-oriented Reactive Programming The most widely used reactive program The Observer design pattern Functional Reactive Programming Higher-order FRP Signals and events Implementation challenges First-order FRP Asynchronous data flow Arrowized FRP Applications of FRP Asynchronous programming and networkingComplex GUIs and animations Summary Chapter 2: A Look at Reactive Extensions The Observer pattern revisited Observer -- an Iterator's dual Creating observables Custom Observables Manipulating observables Flatmap and friends One more flatmap for the road Error handling OnError Catch Retry Backpressure Sample Backpressure strategies Summary Chapter 3: Asynchronous Programming and Networking Building a stock market monitoring application Rolling averages Identifying problems with our current approach Removing incidental complexity with RxClojureObservable rolling averages Summary Chapter 4: Introduction to core.async Asynchronous programming and concurrency core.async Communicating sequential processes Rewriting the stock market application with core.async Implementing the application code Error handling Backpressure Fixed buffer Dropping buffer Sliding buffer Transducers Transducers and core.async Summary Chapter 5: Creating Your own CES Framework with core.async A minimal CES framework Clojure or ClojureScript? Designing the public API Implementing tokens Implementing event streamsImplementing behaviors Exercises Exercise 5.1 Exercise 5.2 A respondent application CES versus core.async Summary Chapter 6: Building a Simple ClojureScript Game with Reagi Setting up the project Game entities Putting it all together Modeling user input as event streams Working with the active keys stream Reagi and other CES frameworks Summary Chapter 7: The UI as a Function The problem with complex web UIs Enter React.js Lessons from Functional Programming Clojurescript and Om Building a simple Contacts application with Om The Contacts application stateSetting up the Contacts project Application components Om cursors Filling in the blanks Intercomponent communication Creating an agile board with Om The board state Components overview Lifecycle and component local state Remaining components Utility functions Exercises Summary Chapter 8: Futures Clojure futures Fetching data in parallel Imminent -- a composable futures library for Clojure Creating futures Combinators and event handlers The movies example revisited Futures and blocking IO Summary