Develop Web Services and Microservices with Java — Lesson 4: Automated Testing, Containers, Deployment, Observability, and Operations

Learning Objectives

• Explain the purpose and operating context of unit, integration, contract, component, negative, and performance tests.
• Apply containerization, configuration, health probes, and deployment strategies and logs, metrics, traces, correlation, alarms, and dependency visibility in a controlled environment.
• Validate outcomes and troubleshoot risks involving release evidence, rollback, support ownership, API documentation, and runbook.

Detailed Topics

• unit, integration, contract, component, negative, and performance tests
• containerization, configuration, health probes, and deployment strategies
• logs, metrics, traces, correlation, alarms, and dependency visibility
• release evidence, rollback, support ownership, API documentation, and runbook

Instructor Demonstration

Demonstrate unit, integration, contract, component, negative, and performance tests for a customer and order integration exposed through REST, SOAP, and independently deployable Java services; capture the exact configuration, code, command, transaction, query, dashboard, model, schedule, or report evidence that proves the expected result.

Hands-On Exercise

Complete a controlled Develop Web Services and Microservices with Java exercise covering containerization, configuration, health probes, and deployment strategies and logs, metrics, traces, correlation, alarms, and dependency visibility; introduce an exception involving release evidence, rollback, support ownership, API documentation, and runbook, diagnose it from evidence, apply the smallest reversible correction, and rerun acceptance checks.

1. Confirm scope, prerequisites, identities, dependencies, data, risks, and expected outcome.
2. Perform the course-specific configuration, development, administration, analysis, or business-process workflow.
3. Capture commands, settings, records, logs, screenshots, reports, metrics, or test results.
4. Compare the observed result with acceptance criteria and document corrective or preventive action.

Scenario Analysis

• Identify the technical or business decision and the stakeholders affected by it.
• Compare security, performance, reliability, compliance, cost, usability, and support trade-offs.
• Define rollback, recovery, communication, evidence, ownership, and escalation requirements.

Troubleshooting Guidance

Diagnose issues involving unit, integration, contract, component, negative, and performance tests, containerization, configuration, health probes, and deployment strategies, logs, metrics, traces, correlation, alarms, and dependency visibility, release evidence, rollback, support ownership, API documentation, and runbook without making an unverified production change. Separate symptoms from causes, gather time-correlated evidence, test a reversible hypothesis, validate the correction, and record recurrence controls.

Validation Checklist

• The requirement, environment, inputs, dependencies, and expected result are documented.
• The result is reproducible and supported by product-specific evidence.
• Normal, boundary, failure, security, performance, and operational conditions are reviewed.
• Exceptions, rollback, ownership, support actions, and the next improvement priority are recorded.

Lesson Outcome

Learners can apply Automated Testing, Containers, Deployment, Observability, and Operations in a realistic Develop Web Services and Microservices with Java scenario and defend the result with documented evidence.