DO040 – Red Hat Agile Integration Technical Overview — Lesson 2: API-Centered Integration, Service Composition, Contracts, and Lifecycle

Learning Objectives

• Configure the main services, objects, and controls involved in API products, service composition, and contracts.
• Apply versioning and API lifecycle while preserving reviewable technical evidence.
• Recognize and correct the risk where a valid command creates the wrong outcome because variables, identity, or sequencing are incorrect.

Detailed Topics

• API products: apply the concept to an enterprise integration team modernizing tightly coupled middleware into reusable cloud-native services, record the relevant settings or decisions, and explain the operational consequence.
• service composition: apply the concept to an enterprise integration team modernizing tightly coupled middleware into reusable cloud-native services, record the relevant settings or decisions, and explain the operational consequence.
• contracts: apply the concept to an enterprise integration team modernizing tightly coupled middleware into reusable cloud-native services, record the relevant settings or decisions, and explain the operational consequence.
• versioning: apply the concept to an enterprise integration team modernizing tightly coupled middleware into reusable cloud-native services, record the relevant settings or decisions, and explain the operational consequence.
• API lifecycle: apply the concept to an enterprise integration team modernizing tightly coupled middleware into reusable cloud-native services, record the relevant settings or decisions, and explain the operational consequence.

Instructor Demonstration

The instructor demonstrates api-centered integration, service composition, contracts, and lifecycle by tracing the relevant architecture, commands, configuration, messages, and evidence. The walkthrough highlights how a valid command creates the wrong outcome because variables, identity, or sequencing are incorrect and shows how to isolate the cause without masking dependent issues.

Hands-On Exercise

Implement the core workflow and compare expected versus observed behavior for API-Centered Integration, Service Composition, Contracts, and Lifecycle. Add verified outcomes to the agile integration capability map, modernization options, governance model, and phased transformation plan.

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 API products in the stated scenario.
• Compare two approaches for versioning and explain the security, reliability, and support trade-offs.
• Decide what evidence must be retained in the agile integration capability map, modernization options, governance model, and phased transformation plan before operational acceptance.

Troubleshooting Guidance

Begin with the first observable difference from the expected result. Check configuration, permissions, sequencing, and functional behavior separately, then correlate logs, events, commands, and configuration history. Do not accept the initial assumption that a valid command creates the wrong outcome because variables, identity, or sequencing are incorrect; confirm the cause with a reproducible retest.

Validation Checklist

• The required configuration, permissions, sequencing, and functional behavior were checked and recorded.
• The normal path and a course-specific exception were tested.
• The agile integration capability map, modernization options, governance model, and phased transformation plan 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 API-Centered Integration, Service Composition, Contracts, and Lifecycle, explain the observed Red Hat platform behavior, and support the result with a reviewable agile integration capability map, modernization options, governance model, and phased transformation plan.