I have created a custom ExecutorService. ExecutorService executor = new ThreadPoolExecutor (0, maxPoolSize, keepAliveTime, timeUnit, new LinkedBlockingDeque<> ()); to which I submit my tasks. Future
result = executor.submit ( () -> "test"); As you can see, the executor returns a meager Future; I'd much rather have a CompletableFuture. First, we are calling the supplyAsync () method which takes a Supplier and returns a new CompletableFuture. Then we are then transforming the result to an uppercase string by calling thenApply () method. In the end, we just print the value on the console using thenAccept () that takes a Consumer as the argument. 
Advanced Java CompletableFuture Features Introducing Completion Stage Methods YouTube
2.1. Factory Methods of the Executors Class. The easiest way to create ExecutorService is to use one of the factory methods of the Executors class. For example, the following line of code will create a thread pool with 10 threads: ExecutorService executor = Executors.newFixedThreadPool ( 10 ); In this article, we'll discuss Java's CompletableFuture and the thread pool it leverages. We'll explore the differences between its async and non-async methods and learn how to maximize the potential of the CompletableFuture API. 2. Non-Async Methods. CompletableFuture offers an extensive API consisting of more than 50 methods. 1. I have tried complex usecases which can be done by CompletableFuture can be done by ExecutorService as well. That includes, handling exceptions as well. The only difference I can see between them is, CompletableFuture gives better readability and convenience during coding. Is there any practical advantage / use-case that one can solve using. The below example takes the completed CompletableFuture from example #1, which bears the result string "message" and applies a function that converts it to uppercase: 7. 1. static void.
A Guide To CompletableFuture in Java with Examples Asynchronous Operations in Java Geekific
ListenableFuture and CompletableFuture are built on top of Java's Future interface. The former is part of Google's Guava library, whereas the latter is part of Java 8. As we know, the Future interface doesn't provide callback functionality. ListenableFuture and CompletableFuture both fill this gap. In this tutorial, we'll learn callback. Let's explore how we can take advantage of asynchronous operations from ExecutorService and CompletableFuture to run tasks in parallel. 1. Create ExecutorService #. Let's first create a new thread pool that reuses some fixed number of threads. ExecutorService executorService = Executors.newFixedThreadPool(10); Java ExecutorService - Part 1 - Introduction (YouTube video) — if you didn't understand ExecutorService from my article; Java CompletableFuture Tutorial with Examples (article) — if you want to master CompletableFuture. Thank you for reading this article! I hope you learned something from it. If you did, please provide some feedback. CompletableFuture. CompletableFuture is a powerful and flexible concurrency API introduced in Java 8 that combines the best features of the Future and Promise APIs. It provides a non-blocking, fluent API for chaining multiple asynchronous operations, and it can be used in combination with the Executor framework for greater control over the. 
Applying Basic Java CompletableFuture Features YouTube
On top of it, we can also provide the Thread pool in which these tasks need to be run like below: ExecutorService executorService = Executors.newFixedThreadPool (3); Integer finalResult. Alternatives to CompletableFuture in Java. While CompletableFuture is a powerful tool for handling asynchronous tasks, it's not the only way to manage them in Java. Two other key approaches include using the Future interface and the ExecutorService class. Exploring the Future Interface
In Java, CompletableFuture and ExecutorService are two popular classes that allow asynchronous execution of code. CompletableFuture is a class introduced in Java 8 that represents a future result. 3. Using completeOnTimeout () The completeOnTimeout () method resolves the CompletableFuture with a default value if the task doesn't finish within the specified time. With this method, we can set the default value to return when a timeout occurs. This method returns the CompletableFuture on which this method is invoked. 
CompletableFuture in Java 8 (Part 1) YouTube
CompletableFuture is a class in java.util.concurrent package that implements the Future and CompletionStage Interface. It represents a future result of an asynchronous computation. It can be thought of as a container that holds the result of an asynchronous operation that is being executed in a different thread. Some methods of CompletableFuture class. CompletableFuture is a class that implements two interface.. First, this is the Future interface. Second, this is the CompletionStage interface.; The fact that the CompletableFuture is also an implementation of this Future object, is making CompletableFuture and Future compatible Java objects.CompletionStage adds methods to chain tasks.
