Introduction

This course focuses on Enterprise JavaBeans (EJB) and Java Persistence API (JPA) within the context of J2EE applications. It provides a comprehensive understanding of how EJB facilitates the development of robust, scalable enterprise applications, while JPA simplifies database interactions. Participants will learn the practical use of EJB and JPA for creating modular, transactional, and data-driven applications, along with best practices for integrating these technologies into J2EE systems.

Prerequisites

• Basic Java Knowledge: Understanding of Java programming, object-oriented principles, and core libraries.
• J2EE Basics: Familiarity with Java EE concepts, including Servlets, JSP, and JDBC.
• Relational Database Knowledge: Understanding of database concepts like tables, relationships, SQL queries, and normalization.
• Basic Understanding of Web Technologies: Familiarity with HTTP, HTML, and web applications.

Table of Contents

1. Introduction to EJB and JPA
1.1. Overview of J2EE and its Components
1.2. Understanding Enterprise JavaBeans (EJB)
1.3. Introduction to Java Persistence API (JPA)
1.4. EJB and JPA in J2EE Application Development
1.5. Key Benefits of EJB and JPA in Enterprise Applications

2. Enterprise JavaBeans (EJB): Core Concepts
2.1. What is EJB?
2.2. Types of EJBs: Session Beans, Message-Driven Beans, and Entity Beans
2.3. EJB Architecture and Lifecycle
2.4. EJB Annotations and Deployment Descriptors
2.5. Handling Transactions in EJB

3. Session Beans in EJB
3.1. Stateless Session Beans
3.2. Stateful Session Beans
3.3. Singleton Session Beans
3.4. EJB Context and Dependency Injection (CDI)
3.5. EJB Security and Interceptors

4. Message-Driven Beans
4.1. Introduction to Message-Driven Beans
4.2. JMS and MDB Integration
4.3. Asynchronous Message Processing
4.4. MDB Transaction Management and Error Handling
4.5. Use Cases for Message-Driven Beans

5. Java Persistence API (JPA) Basics
5.1. Overview of JPA and ORM (Object-Relational Mapping)
5.2. Setting Up JPA in J2EE Applications
5.3. JPA Annotations and Mapping Entities to Relational Tables
5.4. Understanding Entity Manager and Persistence Context
5.5. JPA Query Language (JPQL) and Criteria API

6. Managing Data with JPA
6.1. Basic CRUD Operations with JPA
6.2. Mapping Relationships in JPA (One-to-One, One-to-Many, Many-to-Many)
6.3. Cascading Operations in JPA
6.4. Optimistic and Pessimistic Locking in JPA
6.5. JPA and Transactions

7. EJB and JPA Integration
7.1. Using JPA in Stateless and Stateful Session Beans
7.2. Combining EJB Transactions with JPA Persistence
7.3. Injection of Entity Manager into EJB
7.4. Best Practices for Combining EJB and JPA
7.5. Handling Complex Transactions in EJB and JPA

8. Advanced EJB and JPA Techniques
8.1. EJB Timers and Scheduling Tasks
8.2. EJB Interceptors and Listeners
8.3. JPA Advanced Querying: Named Queries and Native SQL
8.4. Implementing Pagination and Sorting with JPA
8.5. Performance Optimization with JPA and EJB

9. Testing and Debugging EJB and JPA Applications
9.1. Unit Testing EJBs with JUnit
9.2. Mocking and Testing JPA Entities
9.3. Debugging EJB and JPA Issues
9.4. Best Practices for Testing EJB Applications
9.5. Monitoring and Profiling EJB and JPA Performance

10. Deploying EJB and JPA Applications
10.1. Preparing EJB and JPA Applications for Production
10.2. Packaging EJB and JPA for Deployment
10.3. Configuring Application Servers for EJB and JPA
10.4. Troubleshooting Deployment Issues
10.5. Using Containers (Docker) for EJB and JPA Deployments

11. Security Considerations in EJB and JPA
11.1. Securing EJB Applications with Java EE Security
11.2. Role-Based Access Control (RBAC) in EJB
11.3. Securing JPA Data and Transactions
11.4. Using JAAS for Authentication and Authorization
11.5. Auditing and Logging in EJB and JPA

12. Conclusion and Future of EJB and JPA in J2EE Applications
12.1. Recap of Key Concepts in EJB and JPA
12.2. Evolving Trends in Enterprise Java Development
12.3. Modern Alternatives and Trends: Spring, Microservices
12.4. Preparing for Real-World EJB and JPA Applications
12.5. Resources for Further Learning and Certification

Conclusion

This course offers an in-depth exploration of EJB and JPA within the context of J2EE application development. Participants will gain practical knowledge of building enterprise-grade applications using these technologies, focusing on best practices for session beans, message-driven beans, and persistence management with JPA. From securing enterprise systems to integrating EJB and JPA with modern frameworks, this course equips developers with the essential skills to build scalable, maintainable, and secure enterprise applications.