This repository is a professional archive of my transition from standalone logic to Enterprise-Grade Distributed Systems. It documents my mastery of the Java EE ecosystem, focusing on the development of the "AquaLink Manager" platform.
I have categorized my enterprise training into the following core competencies, following a decoupled architectural approach:
- Servlets & Lifecycle: Implementation of
HttpServlet,doGet,doPost, andServletConfig. - Dynamic Views:
JSP(JavaServer Pages),JSTL(JSP Standard Tag Library), and Expression Language (EL). - Session Management: Handling state across requests using
HttpSessionandCookies. - Flow Control:
RequestDispatcher(Forward vs. Include) and Response Redirects.
- Weld Container: Managed bean lifecycles and scope management (
@RequestScoped,@ApplicationScoped). - Inversion of Control: Using
@Injectto decouple Controllers from Business Logic. - Configuration: Metadata handling via
beans.xmland Jandex index discovery.
- Hibernate Core:
Entity Mapping,Session Management, and XML/Annotation Configuration. - JPA Standards:
EntityManager,Persistence Context, and@Entitymapping. - Transaction Management: Implementing JTA for Atomic, Consistent, Isolated, and Durable (ACID) transactions.
- Database Sync:
hbm2ddlstrategies (Create/Update) and SQL Schema synchronization.
This project is built using industry-standard specifications to ensure scalability, portability, and enterprise compliance:
- Java Servlet API (JSR 369): For robust HTTP request processing and web container management.
- Contexts and Dependency Injection (CDI - JSR 365): Using Weld to manage the lifecycle of enterprise beans.
- Java Persistence API (JPA - JSR 338): Utilizing Hibernate as the provider for Object-Relational Mapping (ORM).
- Java Transaction API (JTA - JSR 907): For managing distributed transactions and ensuring data integrity across the repository layer.
- Bean Validation (JSR 380): Implementing Hibernate Validator for metadata-driven data integrity and server-side constraints.
- JavaServer Pages (JSR 245): For creating high-performance, platform-independent dynamic web content.
The "aqua-link-manager" project is the culmination of the Java EE modules. It is a production-grade Water Connection Management System featuring:
- Layered Architecture:
Controller->Service->Repository->Database. - Transaction Integrity: Secure data writes using JTA-compliant transaction boundaries.
- Data Transfer: Clean
DTOpatterns for mapping Request data to Entities. - Validation: Enterprise data sanitization using JSR 380 standards.
- Persistence: Full CRUD integration with MySQL 8.0 using JPA and centralized Resource Providers.
- Database: MySQL Workbench, JDBC Drivers, SQL Constraints.
- Design Patterns: MVC (Model-View-Controller), Singleton, DAO, and DTO.
- Server: Apache Tomcat 9.0 configuration and deployment.
- Build Tool: Maven (
pom.xmldependency and lifecycle management). - Logging: Real-time SOP and Error tracking via Tomcat server logs.
aqua-link-manager/
├── src/main/java/com/xworkz/aqualink/
│ ├── controller/ # Servlet Orchestration & Web Flow
│ ├── service/ # Business Logic & Validation
│ ├── repository/ # JPA-based Data Access & JTA Transactions
│ ├── entity/ # Hibernate Mapping Classes
│ └── dto/ # Request/Response Data Transfer Objects
├── src/main/resources/
│ └── META-INF/ # persistence.xml (DB Config)
└── src/main/webapp/
├── WEB-INF/ # beans.xml (CDI) & web.xml
└── views/ # JSP/JSTL Presentation Layer