To improve Java Future, Java 8 provides CompletableFuture which can execute some code whenever its ready. In this article, we’re gonna take a look at new Java 9 CompletableFuture API that supports delay and timeout.
In tradition approach, implementing Data Access Layer makes lots of boilerplate code. Spring Data provides us Spring JPA which supports the ways to write interface for repositories and custom finder methods. The implementation will be done automatically by Spring Framework.
The tutorial shows you how to execute asynchronous query with Spring JPA and PostgreSQL using Spring Boot.
– Java 8 Streams
– How to use Spring JPA MySQL | Spring Boot
– How to use Spring JPA with PostgreSQL | Spring Boot
– How to get streaming results with Spring JPA, Java 8 Stream and PostgreSQL | Spring Boot
– @DataJPATest with Spring Boot
In previous posts, we have concept of how to use CompletableFutures. This tutorial is about combining multiple CompletableFutures, it is one of the most important and useful abilities of Java 8 asynchronous processing.
Exception handling is important in software development, Java 8 CompletableFuture also provides methods to handle errors when they occurs.
Java 8 multithreading programming has an important feature named CompletableFuture.
In previous post about Java Future, we have the concept of a Future object, which can help us make something done while waiting for other things. However, although we can inspect Future objects to see if they’re done, what if we wanna execute some code whenever its ready? We still have to wait until the result is available.
CompletableFuture meets the requirement, and more than that.