Showing posts with label Spring 4. Show all posts

Friday, 13 April 2018

Spring Architecture_V4 | Spring Tutorial | Spring basics | Spring Framework

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Understanding Spring Framework Architecture (Version 4)

Spring Framework 4.0 was a groundbreaking generation of the framework, bringing first-class support for Java 8 features (such as lambda expressions, default methods, and the Date and Time API). It also introduced a dedicated spring-websocket module and modern annotation-driven configurations.

1. Core Container & Java 8 Enhancements

The Core Container serves as the backbone of the framework, delivering essential Dependency Injection (DI) and Inversion of Control (IoC) mechanics:

Core & Beans: Power the foundational bean factory, managing the entire lifecycle and wiring of components.
Context: Expands upon Core and Beans, adding support for @Conditional components, multi-context hierarchies, and enterprise resources.
SpEL (Spring Expression Language): Allows seamless runtime querying and manipulation of bean properties and invocation of custom methods.

2. AOP, Aspects & Instrumentation

Spring 4 continues to provide modular separation of cross-cutting concerns:

Spring AOP: Decouples transversal tasks such as transaction management, logging, and security from primary business logic.
AspectJ Integration: Seamlessly hooks into AspectJ's rich pointcut and weaving ecosystem.
Instrumentation: Delivers class instrumentation and custom classloader support for enterprise deployment servers.

3. Data Access & Modern Integration

The Data Access layer provides unified abstraction over data stores:

JDBC & Transactions: Declarative transaction management with clean JDBC abstraction templates.
ORM & OXM: Integration with modern persistence standards including JPA 2.1, Hibernate, and XML Marshalling.
Messaging & JMS: Introduces key abstractions for messaging protocols and annotation-driven listener containers.

4. Web, REST & WebSocket Architecture

A major milestone in Spring 4 is the expansion of web architectures beyond traditional request-response cycles:

Spring Web MVC: Enhanced @RestController support and asynchronous request handling.
WebSocket Module: Provides dedicated bidirectional, full-duplex communication support using WebSockets and STOMP messaging.