Introduction

This course explores the transformation of traditional J2EE applications into modern microservices-based architectures, focusing on the cloud transition. Participants will learn how to break down monolithic J2EE applications into loosely coupled, scalable microservices, and leverage cloud platforms to enhance scalability, flexibility, and resilience. The course also covers the challenges and best practices in migrating to cloud-native environments, including the integration of containerization, orchestration tools, and microservices design patterns.

Prerequisites

• Basic Java Knowledge: Understanding of Java programming concepts and object-oriented principles.
• J2EE Basics: Familiarity with Java EE technologies such as Servlets, JSP, EJB, and JDBC.
• Cloud Fundamentals: Basic understanding of cloud computing concepts, such as IaaS, PaaS, and SaaS.
• Containerization Knowledge: Familiarity with Docker and container-based development.

Table of Contents

1. Introduction to J2EE and Microservices
1.1. Overview of J2EE Architecture and Features
1.2. Understanding Microservices Architecture
1.3. Benefits of Transitioning from J2EE to Microservices
1.4. Cloud-Native Architecture: Key Concepts
1.5. Challenges in Migrating from Monolithic to Microservices

2. J2EE Monolithic Applications and Their Limitations
2.1. Characteristics of Monolithic J2EE Applications
2.2. Scalability, Maintainability, and Performance Issues
2.3. Limitations in Adapting to Modern Business Needs
2.4. Why Microservices are the Future of Application Development

3. Key Concepts in Microservices
3.1. What Makes an Application “Microservice”
3.2. Advantages of Microservices Over Monolithic Architectures
3.3. Designing Microservices: Domain-Driven Design (DDD)
3.4. Decentralized Data Management in Microservices
3.5. Service Communication and Interoperability

4. Cloud Platforms for Microservices Deployment
4.1. Overview of Major Cloud Providers (AWS, Azure, Google Cloud)
4.2. Choosing the Right Cloud Model for Microservices
4.3. Benefits of Cloud-Native Development for Microservices
4.4. Leveraging Cloud Services (Databases, Messaging, CI/CD)
4.5. Introduction to Cloud Orchestration Tools (Kubernetes, Docker Swarm)

5. Migrating J2EE Applications to Microservices
5.1. Breaking Down Monolithic Applications into Microservices
5.2. Identifying Services and Dependencies in J2EE Applications
5.3. Refactoring Business Logic for Microservices
5.4. Migrating Database Models to Microservices
5.5. Handling Transactions and Data Consistency

6. Containerization with Docker for Microservices
6.1. Introduction to Docker and Containers
6.2. Containerizing J2EE Applications and Microservices
6.3. Building Docker Images for Microservices
6.4. Using Docker Compose for Multi-Service Applications
6.5. Best Practices for Managing Containers in the Cloud

7. Orchestration and Service Management with Kubernetes
7.1. Overview of Kubernetes and its Role in Microservices
7.2. Setting Up Kubernetes Clusters in the Cloud
7.3. Managing Microservices with Kubernetes
7.4. Service Discovery, Load Balancing, and Scaling
7.5. Deploying J2EE-based Microservices on Kubernetes

8. Integrating Microservices with Legacy J2EE Applications
8.1. Hybrid Architecture: Integrating Microservices with J2EE
8.2. API Gateways for Managing Legacy and Microservices Communication
8.3. Event-Driven Architecture for Microservices Integration
8.4. Using Messaging Systems (Kafka, RabbitMQ) for Microservices Communication
8.5. Maintaining Data Consistency Between Legacy and Microservices

9. Security and Monitoring in Microservices Architectures
9.1. Securing Microservices: Authentication and Authorization
9.2. Implementing API Security for Microservices
9.3. Centralized Logging and Monitoring with ELK Stack
9.4. Managing Microservices Health and Performance
9.5. Continuous Security Practices in the Cloud

10. Continuous Integration and Continuous Deployment (CI/CD)
10.1. Introduction to CI/CD for Microservices
10.2. Setting Up a CI/CD Pipeline for Cloud-Based Microservices
10.3. Automating Testing and Deployment for Microservices
10.4. Blue-Green Deployments and Canary Releases
10.5. Monitoring and Rollback Strategies in CI/CD

11. Best Practices and Design Patterns for Cloud-Native Microservices
11.1. Microservices Design Patterns (API Gateway, Circuit Breaker)
11.2. Event Sourcing and CQRS in Microservices
11.3. Decoupling Microservices with Event-Driven Architecture
11.4. Best Practices for Service Discovery and Communication
11.5. Handling Fault Tolerance and Resiliency

12. Conclusion and Future Trends in Cloud and Microservices
12.1. Key Takeaways for Transitioning from J2EE to Microservices
12.2. Scaling Microservices in the Cloud: Challenges and Solutions
12.3. Future Trends in Cloud-Native Applications and Microservices
12.4. Preparing for the Evolving Cloud Landscape
12.5. Resources for Further Learning and Certification

Conclusion

This course provides a comprehensive roadmap for transforming traditional J2EE applications into microservices architectures suitable for deployment in the cloud. By leveraging containerization, orchestration tools like Kubernetes, and cloud-native patterns, participants will learn how to create scalable, resilient, and maintainable microservices-based applications. The course also emphasizes security, monitoring, and the importance of CI/CD pipelines for seamless operations in the cloud. Students will be equipped with the skills to navigate the challenges of modernizing legacy applications while maintaining high standards of performance and security.