Enterprise Java Development with GlassFish & JasperReports — Lesson 2: JPA, Transactions, EJB, REST Services, Validation, and Application Design

Learning Objectives

• Trace prerequisites, dependencies, ownership, and failure conditions for jpa, transactions, ejb, rest services, validation, and application design.
• Configure the course-specific workflow while collecting evidence at each material checkpoint.
• Defend the solution against security, compliance, reliability, performance, and support expectations.

Detailed Topics

• JPA
• Transactions
• EJB
• REST Services
• Validation
• Application Design
• business ownership, prerequisites, data, roles, and acceptance criteria for jpa, transactions, ejb, rest services, validation, and application design
• security, controls, integration, performance, and support implications for jpa, transactions, ejb, rest services, validation, and application design

Instructor Demonstration

Demonstrate jpa, transactions, ejb, rest services, validation, and application design within an enterprise Java application deployed to GlassFish that produces governed JasperReports from transactional data and survives production load. Use representative data and capture domain and resource configuration, deployed application status, transaction tests, REST responses, compiled report templates, exported reports, logs, and load results so the result can be independently checked.

Hands-On Exercise

Build or execute a controlled Enterprise Java Development with GlassFish & JasperReports exercise focused on jpa, transactions, ejb, rest services, validation, and application design. Introduce one realistic failure related to resource misconfiguration, transaction failures, insecure services, report-query bottlenecks, broken parameters, memory pressure, and deployment drift; isolate the cause, apply a reversible correction, and rerun the acceptance checks.

1. Record the requirement, environment, identities, dependencies, data, controls, and expected result.
2. Perform the lesson workflow and capture evidence before and after each material change.
3. Test normal, boundary, failure, security, reconciliation, and operational conditions relevant to the topic.
4. Document the root cause, correction, rollback, owner, support action, and next improvement priority.

Scenario Analysis

• Establish the current state, desired state, constraints, and tolerance for disruption.
• Compare alternate implementation or diagnostic approaches and their rollback implications.
• Document the decision, evidence, exceptions, follow-up actions, and measurable improvement target.

Troubleshooting Guidance

When jpa, transactions, ejb, rest services, validation, and application design does not produce the expected result, first confirm scope, effective dates, identities, data context, and recent changes. Review the Oracle-specific logs, reports, traces, calculations, workflow history, or transaction status relevant to the lesson. Test one reversible hypothesis at a time and verify that the correction does not create resource misconfiguration, transaction failures, insecure services, report-query bottlenecks, broken parameters, memory pressure, and deployment drift elsewhere in the process.

Validation Checklist

• Prerequisites, ownership, data context, settings, and expected outcomes are documented.
• The workflow is reproducible and supported by domain and resource configuration, deployed application status, transaction tests, REST responses, compiled report templates, exported reports, logs, and load results.
• Security, controls, data quality, integration, performance, recovery, and support conditions are reviewed.
• Exceptions, corrective action, rollback, approvals, monitoring, and handover are recorded.

Lesson Outcome

Learners can apply JPA, Transactions, EJB, REST Services, Validation, and Application Design in a realistic Enterprise Java Development with GlassFish & JasperReports situation and defend the result with course-specific evidence.