https://blog.devops-monk.com/tags/async/Recent content in Async on Devops MonkHugoen-usMon, 04 May 2026 00:00:00 +0000https://blog.devops-monk.com/tutorials/java8/completablefuture/Mon, 04 May 2026 00:00:00 +0000https://blog.devops-monk.com/tutorials/java8/completablefuture/The Problem with Future<T> Fetching a product page on an e-commerce site requires at least three data sources: product details, live pricing, and inventory availability. Done sequentially, a 200 ms call to each service adds up to 600 ms. Done in parallel with a properly composed CompletableFuture pipeline, the wall-clock time drops to roughly the slowest of the three — around 200 ms. This article shows exactly how to build that pipeline and everything else you need to write robust async code in Java 8.https://blog.devops-monk.com/tutorials/java11/http-client-api/Mon, 04 May 2026 00:00:00 +0000https://blog.devops-monk.com/tutorials/java11/http-client-api/Why a New HTTP Client? HttpURLConnection — Java’s HTTP API since Java 1.1 — has deep design problems: Mutable shared state makes it error-prone in multithreaded code No built-in HTTP/2 support No built-in async; non-blocking requires manual thread management Clunky API: setDoOutput(true), getOutputStream(), connect() in sequence No support for reactive streams JEP 321 (Java 11) standardised the HTTP Client API that was incubating since Java 9. The new API lives in java.https://blog.devops-monk.com/tutorials/spring-boot/spring-boot-async-virtual-threads/Sun, 03 May 2026 00:00:00 +0000https://blog.devops-monk.com/tutorials/spring-boot/spring-boot-async-virtual-threads/Not every operation needs to complete before the response returns. Sending an email, generating a report, publishing an event — these can run in the background. Async processing keeps request latency low while the work continues. @Async — Fire and Forget @SpringBootApplication @EnableAsync public class OrderServiceApplication { } @Service @Slf4j public class NotificationService { @Async // runs in a separate thread public void sendOrderConfirmation(Order order) { log.info("Sending confirmation for order {}", order.