AD183 Red Hat Application Development I: Programming in Java EE — Lesson 3: Security, Messaging, Enterprise Services, Configuration, and Integration

Learning Objectives

• Evaluate security, resilience, integration, and exception handling for security, messaging, and enterprise services.
• Apply configuration and integration while preserving reviewable technical evidence.
• Recognize and correct the risk where the design works normally but fails under scale, dependency loss, policy enforcement, or integration delay.

Detailed Topics

• security: apply the concept to a Java team building and deploying a maintainable enterprise application on Red Hat JBoss EAP, record the relevant settings or decisions, and explain the operational consequence.
• messaging: apply the concept to a Java team building and deploying a maintainable enterprise application on Red Hat JBoss EAP, record the relevant settings or decisions, and explain the operational consequence.
• enterprise services: apply the concept to a Java team building and deploying a maintainable enterprise application on Red Hat JBoss EAP, record the relevant settings or decisions, and explain the operational consequence.
• configuration: apply the concept to a Java team building and deploying a maintainable enterprise application on Red Hat JBoss EAP, record the relevant settings or decisions, and explain the operational consequence.
• integration: apply the concept to a Java team building and deploying a maintainable enterprise application on Red Hat JBoss EAP, record the relevant settings or decisions, and explain the operational consequence.

Instructor Demonstration

The instructor demonstrates security, messaging, enterprise services, configuration, and integration by tracing the relevant architecture, commands, configuration, messages, and evidence. The walkthrough highlights how the design works normally but fails under scale, dependency loss, policy enforcement, or integration delay and shows how to isolate the cause without masking dependent issues.

Hands-On Exercise

Introduce a controlled boundary condition and test recovery for Security, Messaging, Enterprise Services, Configuration, and Integration. Add verified outcomes to the Java EE application repository, integration tests, deployment package, and developer handover guide.

1. Confirm the scope, versions, access, dependencies, and success criteria.
2. Perform the workflow while recording commands, settings, output, and platform events.
3. Test one expected case and one controlled exception specific to this lesson.
4. Retest the correction and document ownership, rollback, and follow-up actions.

Scenario Analysis

• Identify which dependency most strongly influences security in the stated scenario.
• Compare two approaches for configuration and explain the security, reliability, and support trade-offs.
• Decide what evidence must be retained in the Java EE application repository, integration tests, deployment package, and developer handover guide before operational acceptance.

Troubleshooting Guidance

Begin with the first observable difference from the expected result. Check security, integration, boundary conditions, and resilience separately, then correlate logs, events, commands, and configuration history. Do not accept the initial assumption that the design works normally but fails under scale, dependency loss, policy enforcement, or integration delay; confirm the cause with a reproducible retest.

Validation Checklist

• The required security, integration, boundary conditions, and resilience were checked and recorded.
• The normal path and a course-specific exception were tested.
• The Java EE application repository, integration tests, deployment package, and developer handover guide links conclusions to commands, configuration, logs, or other objective evidence.
• Corrective actions, rollback steps, ownership, and handover notes are complete.

Lesson Outcome

Learners can apply Security, Messaging, Enterprise Services, Configuration, and Integration, explain the observed Red Hat platform behavior, and support the result with a reviewable Java EE application repository, integration tests, deployment package, and developer handover guide.