Functional Reactive With Core Java - Voxxed Melbourne
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The document discusses the importance of user interfaces in software development, emphasizing simplicity and developer productivity as key components of creating a positive user experience. Vaadin, a technology that supports building web applications, aims to empower developers by providing tools to create effective user interfaces while promoting a cohesive brand image. The text also touches on functional programming concepts in Java, including the distinction between object-oriented and functional approaches, and introduces various features of Java 8 and beyond.
Functional Reactive With Core Java - Voxxed Melbourne
- 1. F U N C T I O N A L - R E A C T I V E @ S V E N R U P P E R T 5 S T O R Y A N D P H I L O S O P H Y Software is eating the world and what most of us see of it is the user interface. The user interface has become the key component of how the users experience the business behind it. Competition is lost or won due to user experience. Simplicity is king and the users get frustrated by anything ugly, slow or not working on the device they happen to use at the time. We at Vaadin fight for simplicity and invite everyone to join this fight. Together we want to build a user interface that puts a smile on the user’s face. Vaadin is the technology that empowers developers to build the best web-apps for business purposes. Our priority over everything else is developer productivity because we believe that by simplifying the developer experience and saving the developer’s time, they are best able to focus on building great user interfaces. Our brand is what we want everyone to think about us. When everyone - both us and the people around us - have a consistent understanding of what Vaadin is and what we stand for, it enables that image to spread and amplify. This book defines what we want that image to be. It defines what the Vaadin brand is. I hope that You are as excited and proud of living and breathing the Vaadin brand as I am. You are the one who is shaping what everyone thinks about Vaadin - using this brand as a tool and a guideline every day. Let’s fight for simplicity for both the users and the developers! Joonas Lehtinen Founder & CEO Vaadin I N T R O D U C T I O N W I T H C O R E J AVA 8 - 11 A N D B E Y O N D
- 2. S V E N R U P P E R T Developer Advocate @ Vaadin 5 C O D I N G J AVA S I N C E 1 9 9 6 C O N S U LT I N G W O R L D W I D E Public Sector: Military / Government Private Sector: Automotive / Aerospace / SMB / NonProfit / NonGov: World Bank / UN / YPARD / CGIAR D I S T R I B U T E D S Y S T E M S S I N C E 2 0 0 2 J O I N E D VA A D I N 2 0 1 7
- 3. I N T R O D I F F E R E N C E S B E T W E E N O O A N D F P I N J AVA
- 4. 4 @SvenRuppertJava8 - Optional<T> the border between OO and FP in Java is not 100% clear.
- 5. @SvenRuppert S I N C E J AVA 8 Functional Interfaces - basics
- 6. 6 @SvenRuppertJava8 - Functional Interfaces
- 7. 7 @SvenRuppertJava8 - Functional Interfaces
- 8. 8 @SvenRuppertJava8 - Functional Interfaces
- 9. 9 @SvenRuppertJava8 - Functional Interfaces
- 10. 10 @SvenRuppertJava9 - Functional Interfaces Java9 - JEP213
- 11. @SvenRuppert S I N C E J AVA 8 Optional<T>
- 15. Optional<T> - since JDK10 @SvenRuppert
- 16. @SvenRuppert S I N C E J AVA 8 Result<T>
- 17. Optional<T> @SvenRuppert Not symmetric Not async - blocking only Not functional enough Declared final - no inheritance Having ValueTypes in mind We need something
- 18. Result<T> @SvenRuppert Must be easy to transform Optional <-> Result Should work as an Drop-In-Replacement Should connect to the Reactive-World Should be symmetric Must fit functional style / oo style
- 19. Result<T> @SvenRuppert Transform from and to an Optional pos. and neg. available
- 21. @SvenRuppert Handle both ways Async if needed Result<T>
- 22. @SvenRuppert Combine with Value and Transformation Async if needed Result<T>
- 23. @SvenRuppert Combine with Value / Function Async if needed Combine with a function Result<T>
- 24. @SvenRuppert S I N C E J AVA 8 Exceptions
- 35. @SvenRuppert H O W T O U S E F U N C T I O N S … Functions - Basics
- 36. Functions - Java8 36 @SvenRuppert a function is a transformation input -> output (input - type, input value) (output - type, output value)
- 41. 41 @SvenRuppert Compose is not so nice.. but Functions - Java8
- 42. 42 @SvenRuppert Attention : make a semantic equal function !! Functions - Java8
- 43. 43 @SvenRuppertFunctions - Java8 How to get an instance of a function?
- 47. Functions - Java8 - extract the logic ! 47 @SvenRuppert
- 50. @SvenRuppert G E N E R I C B A C K A N D F O R WA R D Currying
- 55. @SvenRuppert P U R E F U N C T I O N A L B E H AV I O R Memoizing
- 67. @SvenRuppert H O W T O D E C I D E ? Case
- 69. @SvenRuppertCase
- 70. @SvenRuppertCase
- 71. @SvenRuppertCase
- 72. @SvenRuppertCase
- 73. @SvenRuppert H O W T O U S E , H O W T O B U I L D Streams
- 74. Streams @SvenRuppert A Stream is active after creation want to define a Stream without starting it maybe creating it interactively we need a function ! Function<T, Stream<R>> Function<Stream<T>, Stream<R>>
- 75. @SvenRuppert H O W R E A C T I V E W I L L S TA R T Observer
- 79. 79 @SvenRuppertObserver key not needed anymore
- 81. @SvenRuppert H O W T O U S E F U N C T I O N S … A S Y N C … CompletableFuture
- 82. 82 @SvenRuppertJava8 - CompletableFuture Process Thread Fiber CompletionStage CompletionStage CompletionStage
- 85. 85 @SvenRuppert Operator 1 Value A Operator 2a Result Value B Value C Java8 - CompletableFuture
- 89. 89 @SvenRuppertJava8 - CompletableFuture Operator 1 Value A Operator 2a Result Value B Value C
- 90. @SvenRuppert H O W T O C R E AT E A G R A P H E A S Y. . CompletableFutureQueue
- 91. 91 @SvenRuppertCompletableFutureQueue CompletableFuture is active after creation want to define a CompletableFuture without starting it maybe creating it interactively we need a function ! Function<T, CompletableFuture<R>> Function< CompletableFuture<T>, CompletableFuture<R>>
- 94. Summary 94 @SvenRuppert places to read more about it https://github.com/functional-reactive
- 95. Summary 95 @SvenRuppert please, follow me ;-) @SvenRuppert Thank You !!!