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Founded by passionate advocates of learning and innovation, Learni set out to make professional training accessible to everyone, everywhere in the world. Our team works in the largest cities such as Paris, Lyon, Marseille, and internationally, to support talents and organizations in their skills development.
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Professional Training training in New York in September 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
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Don't let this gap widen
Sans maîtrise de l'intégration des microservices REST via OpenFeign, 70 % des incidents de production proviennent de communications HTTP défaillantes, multipliant les temps d'arrêt par 3.
Les entreprises perdent en moyenne 85 000 € par incident majeur, avec des développeurs gaspillant 45 % de leur temps en débogage manuel au lieu d'innover.
Ces dysfonctionnements freinent les déploiements, exposent à des failles de sécurité et compromettent la scalabilité, menaçant la compétitivité et votre ascension professionnelle.
Chaque trimestre sans expertise aggrave ces pertes, transformant des projets ambitieux en échecs coûteux.
The OpenFeign : Maîtriser l’intégration des microservices REST (Formation complète) training is delivered in-person or remotely (blended-learning, e-learning, virtual classroom, remote in-person). At Learni, a Qualiopi-certified training organization, each program is designed to maximize skills acquisition, regardless of the training mode chosen.
The trainer alternates between demonstrative, interrogative, and active methods (through practical exercises and/or real-world scenarios). This pedagogical approach ensures concrete and directly applicable learning in the workplace.
To ensure the quality of the OpenFeign : Maîtriser l’intégration des microservices REST (Formation complète) training, Learni provides the following teaching resources:
For in-house training at a location external to Learni, the client ensures and commits to having all necessary teaching materials (IT equipment, internet connection...) for the proper conduct of the training action in accordance with the prerequisites indicated in the communicated training program.
The assessment of skills acquired during the OpenFeign : Maîtriser l’intégration des microservices REST (Formation complète) training is carried out through:
Learni is committed to the accessibility of its professional training programs. All our training programs are accessible to people with disabilities. Our teams are available to adapt teaching methods to your specific needs. Do not hesitate to contact us for any accommodation request.
Learni training programs are available for inter-company and intra-company settings, both in-person and remote. Registration is possible up to 48 business hours before the start of training. Our programs are eligible for OPCO, Pôle emploi, and FNE-Formation funding. Contact us to discuss your training project and funding possibilities.
Présentation d’OpenFeign et de ses usages. Mise en contexte dans une architecture microservices. Créer et configurer un projet Spring Boot employant OpenFeign. Réaliser des premiers clients HTTP type-safe vers des API tierces. Les annotations Feign (@FeignClient, @RequestLine, etc.). Démos, exercices de codage pour appel simple d’API REST.
Configurer les mappings personnalisés, transmettre des paramètres complexes, gérer les payloads JSON/XML. Discovery avec Spring Cloud (Eureka/Consul). Mise en œuvre des timeouts, retries automatiques. Intégration de Circuit Breaker (Hystrix/Resilience4j). Stratégies pour sécuriser les échanges (OAuth2/JWT). Simulations de pannes et de latence réseau. Revue d’expériences réelles, atelier d’intégration.
Target audience
Développeurs Java, architectes logiciels et équipes techniques souhaitant automatiser la communication entre microservices via OpenFeign
Prerequisites
Bonnes connaissances en Java et bases de Spring Boot
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