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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.
10 spots per session maximum — 9 already taken
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Don't let this gap widen
Without mastery of OpenFeign for consuming REST APIs in Java, developers waste 25-40 hours weekly on debugging faulty client configurations and retry logic failures.
This inefficiency translates to project delays costing companies an average of $150,000 per major release in lost productivity and rushed fixes.
Moreover, 68% of production outages in Java microservices environments are linked to improper API handling, exposing firms to regulatory fines and reputational damage exceeding $500,000 annually.
Every month without proficiency amplifies these risks, stalling innovation and jeopardizing career advancement in competitive IT landscapes.
The Training: Mastering OpenFeign: Effectively Consuming REST APIs in Java 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 Training: Mastering OpenFeign: Effectively Consuming REST APIs in Java 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 Training: Mastering OpenFeign: Effectively Consuming REST APIs in Java 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.
Presentation of OpenFeign, history and positioning, installation in a Spring Boot project, creation of first REST clients, basic configuration (yml/properties), discovery of proxy operation.
HTTP headers manipulation, cookies and dynamic parameters management, use of interceptors and loggers, error handling (fallback, retries, custom exceptions), securing calls (OAuth2, JWT, BasicAuth, HTTPS).
Integration with Eureka and Ribbon for service discovery, fault tolerance management (Hystrix/Resilience4J), unit and integration tests, monitoring and logging strategies (Spring Actuator, Sleuth), refactoring, best practices, and performance optimization.
Target audience
Java developers, software architects, IT professionals wishing to integrate external services via REST API
Prerequisites
Mastery of Java basics, fundamental knowledge of REST APIs and Spring frameworks
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