JVM summit, virtual threads, stacks applicatives, licences, déterminisme et LLMs, quantification, deux outils de l'épisode et bien plus encore.
Enregistré le 13 septembre 2024
Téléchargement de l'épisode LesCastCodeurs-Episode–315.mp3
News
Langages
Netflix utilise énormément Java et a rencontré un problème avec les Virtual Thread dans Java 21. Les ingénieurs de Netflix analysent ce problème dans cet article : https://netflixtechblog.com/java–21-virtual-threads-dude-wheres-my-lock–3052540e231d
- Les threads virtuels peuvent améliorer les performances mais posent des défis.
- Un problème de locking a été identifié : les threads virtuels se bloquent mutuellement.
- Cela entraîne des performances dégradées et des instabilités.
- Netflix travaille à résoudre ces problèmes et à tirer pleinement parti des threads virtuels.
Une syntax pour indiquer qu'un type est nullable ou null-restricted arriverait dans Java https://bugs.openjdk.org/browse/JDK–8303099
- Foo! interdirait null
- Foo? indiquerait que null est accepté
- Foo?[]! serait un tableau non-null de valeur nullable
- Il y a aussi des idées de syntaxe pour initialiser les tableaux null-restricted
- JEP: https://openjdk.org/jeps/8303099
Les vidéos du JVM Language Summit 2024 sont en ligne https://www.youtube.com/watch?v=OOPSU4LnKg0&list=PLX8CzqL3ArzUEYnTa6KYORRbP3nhsK0L1
- Project Leyden Update
- Project Babylon - Code Reflection
- Valhalla - Where Are We?
- An Opinionated Overview on Static Analysis for Java Rethinking Java String Concatenation
- Code Reflection in Action - Translating Java to SPIR-V Java in 2024
- Type Specialization of Java Generics - What If Casts Have Teeth ? (avec notre Rémi Forax national !)
- aussi tip or tail pour tout l'ecosysteme
- quelques liens sur Babylon: Code reflection pour exprimer des langages etranger (SQL) dans Java: https://openjdk.org/projects/babylon/ et sont example en emulation de LINQ https://openjdk.org/projects/babylon/articles/linq
Librairies
Micronaut sort sa version 4.6 https://micronaut.io/2024/08/26/micronaut-framework–4–6–0-released/
- essentiellement une grosse mise à jour de tonnes de modules avec les dernières versions des dépendances
Microprofile 7 faire quelques changements et evolution incompatibles https://microprofile.io/2024/08/22/microprofile–7–0-release/#general
- enleve Metrics et remplace avec Telemetry (metrics, log et tracing)
- Metrics reste une spec mais standalone
- Microprofile 7 depende de Jakarta Core profile et ne le package plus
- Microprofile OpenAPI 4 et Telemetry 2 amenent des changements incompatibles
Quarkus 3.14 avec LetsEncrypt et des serialiseurs JAckson sans reflection https://quarkus.io/blog/quarkus–3–14–1-released/
- Hibernate ORM 6.6
- Serialisateurs JAckson sans reflection
- installer des certificats letsencrypt simplement (notamment avec la ligne de commande qui aide
- sympa notamment avec ngrok pour faire un tunnel vers son localhost
- retropedalage sur
@QuarkusTestResourcevs@WithTestResourcesuite aux retour de OOME et lenteur des tests mieux isolés
Les logs structurées dans Spring Boot 3.4 https://spring.io/blog/2024/08/23/structured-logging-in-spring-boot–3–4
- Les logs structurées (souvent en JSON) vous permettent de les envoyer facilement vers des backends comme Elastic, AWS CloudWatch…
- Vous pouvez les lier à du reporting et de l'alerting.
- Spring Boot 3.4 prend en charge la journalisation structurée par défaut. Il prend en charge les formats Elastic Common Schema (ECS) et Logstash, mais il est également possible de l'étendre avec vos propres formats.
- Vous pouvez également activer la journalisation structurée dans un fichier. Cela peut être utilisé, par exemple, pour imprimer des journaux lisibles
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