Álvaro Sánchez-Mariscal
Álvaro is a passionate developer and agile enthusiast with over 22 years of experience. He is now a Principal Member of Technical Staff at Oracle Labs, where he is a Micronaut committer, helping to maintain and evolve the open-source framework.
Álvaro has spoken in 16 different countries at conferences like Devoxx BE/FR/MA, several Voxxed Days, GeeCON, JavaLand, JavaZone, Codemotion and Commit Conf, among others. In his spare time, as well as coding and experimenting with new technologies, he likes to spend time with his wife and children, support CD Leganés football team, and play paddle tennis.
Revealing the magic behind Java annotations
Annotations, introduced in Java 5 two decades ago, have revolutionised how we develop Java applications. Traditional frameworks like Spring and Hibernate rely on runtime annotation processing using reflection to perform tasks such as dependency injection or implement persistence operations. Alternatively, the Java Annotation Processing API, introduced in Java 6 in 2006, allows developers to hook into the compilation phase to process sources and react to annotations present on them. This was leveraged by libraries like Lombok and Dagger, and frameworks such as Micronaut, although their way of processing annotations varies. Other frameworks like Quarkus perform the annotation processing during build time, instead of the compilation time. In this session, Micronaut Framework committer Álvaro Sánchez-Mariscal will explain with examples the different techniques that can be used for both runtime and compile-time processing of annotations, revealing the magic behind popular open-source projects.