Java SE: Exploiting Modularity and Other New Features Ed 1.1 — Lesson 2: Modular Services, Layering, Packaging, Runtime Images, and Migration

Technical Scope

• service provider interfaces, ServiceLoader, consumers, and providers
• modular JARs, multi-release JARs, compatibility, and version boundaries
• jlink custom runtime images, launchers, size, and deployment validation
• incremental migration, automatic modules, test strategy, and rollback

Instructor Demonstration

Demonstrate service provider interfaces, ServiceLoader, consumers, and providers within a legacy Java application decomposed into explicit modules, upgraded to modern language and API features, tested for compatibility, and packaged for reliable deployment, then capture the exact configuration, command, transaction, report, trace, or code evidence that proves the expected result.

Applied Workshop

Implement a controlled workshop covering modular JARs, multi-release JARs, compatibility, and version boundaries and jlink custom runtime images, launchers, size, and deployment validation, then test a failure, exception, or business-control scenario involving incremental migration, automatic modules, test strategy, and rollback.

1. Confirm the environment, identities, data, dependencies, controls, and expected result.
2. Complete the product-specific configuration, development, analysis, or business-process task.
3. Capture commands, configuration, output, logs, transactions, reports, or test evidence.
4. Explain the operational, security, performance, data-quality, or business trade-off.

Validation Standard

The Modular Services, Layering, Packaging, Runtime Images, and Migration result must be reproducible, traceable to approved inputs, and consistent with expected Oracle product or business-process behavior.

• The intended target, scope, and ownership are verified.
• The result is supported by reproducible evidence and expected-value checks.
• Security, performance, reliability, data quality, and support impact are reviewed.
• Unexpected behavior is investigated before acceptance or release.

Failure Analysis

Diagnose issues in service provider interfaces, ServiceLoader, consumers, and providers, modular JARs, multi-release JARs, compatibility, and version boundaries, jlink custom runtime images, launchers, size, and deployment validation, or incremental migration, automatic modules, test strategy, and rollback without making an unverified production change.

Learners isolate the smallest proven cause, apply a reversible correction, rerun validation, and record the preventive action.

Practical Outcome

Complete a validated implementation or analysis for Modular Services, Layering, Packaging, Runtime Images, and Migration and defend the result with documented evidence.