The Red Hat Certified Enterprise Microservices Developer (EX283) exam tests your skills and knowledge to develop reliable, performant JEE applications in a microservices-style environment. The exam focuses on using the Microprofile APIs to develop microservices enterprise Java applications. By passing this exam, you become a Red Hat Certified Enterprise Microservices Developer, which also counts toward becoming a Red Hat® Certified Architect (RHCA®). This exam is based on Eclipse MicroProfile 1.3.
Who Can Benefit
JEE developers who wish to demonstrate their skills and abilities using Java to develop advanced, microservices-oriented enterprise applications.
Prerequisites
- Attend Red Hat Application Development II: Implementing Microservice Architectures (JB283)
- Pass Red Hat Certified Enterprise Application Developer Exam (EX183) or have equivalent industry JEE experience
- Be familiar with using Red Hat® JBoss® Developer Studio in a Red Hat® Enterprise Linux environment
- Have a solid background with JEE, including a knowledge and understanding of the core Java concepts and APIs. For example, exceptions, annotations, and the collections API are all required during the exam
- Some familiarity with Openshift is beneficial
Preparation
Red Hat encourages you to consider taking Red Hat Application Development II: Implementing Microservice Architectures (JB283) to help prepare. Attendance in these classes is not required; students can choose to take just the exam. While attending Red Hat classes can be an important part of one's preparation to take this exam, attending class does not guarantee success on the exam. Previous experience, practice, and native aptitude are also important determinants of success. Many books and other resources on system administration for Red Hat's products are available. Red Hat does not officially endorse any as preparation guides for its exam. Nevertheless, you may find additional reading deepens understanding and can prove helpful.
Exam format
This exam is a hands-on, practical exam that requires you to undertake real-world development tasks. Internet access is not provided during the exam, and you will not be permitted to bring any hard copy or electronic documentation into the exam. This prohibition includes notes, books, or any other material. MicroProfile specification and related documentation is available during the exam.
Provide and obtain configuration properties through several environment-aware sources both internal and external to the application and made available through dependency injection or lookup using Configuration for Microprofile
- Externalize data into configured values
- Inject configured values into beans using the @Inject and the @ConfigProperty qualifier
- Access or create a certain configuration
- Understand default and custom ConfigSource and ConfigSource ordering
- Understand and implement converters
Separate execution logic from business logic using Microprofile Fault Tolerance
- Understand the relationship to MicroProfile Config
- Understand async vs. sync execution type and know the default
- Use @Timeout
- Understand retry policies and apply using @Retry
- Understand and define fallback
- Understand and apply CircuitBreaker and Bulkhead
- Understand and set up fault tolerance configuration
Probe the state of a computing node from another machine using MicroProfile Health Check
- Understand and implement the Health Check interface and Health Check Response
- Construct human-friendly Health Check Response
- Understand protocol and wireformat
Export monitoring data to management agents using Microprofile Metrics
- Understand difference with Health Check
- Understand and use three sets of sub-resource (scopes): base, vendor, and application
- Understand tags (labels), metric registry, and @Metric
- Understand metadata and why it is best practice
- Expose metrics via REST API
- Know required metrics
- Understand application metrics programming model
MicroProfile Interoperable JWT RBAC: OpenID Connect (OIDC)–based JSON Web Tokens (JWTs) for role-based access control (RBAC) of microservice endpoints
- Understand security tokens in RESTful services and token-based authentication
- Use JWT bearer tokens to protect services
- Mark a JAX-RS application as requiring MP-JWT access control
- Map MP-JWT tokens to Java EE Container APIs
