Spring Framework

2 days Online / Zoom English Certificate 15 people max Victor Rentea €7500 ~~9375~~

This course provides a comprehensive, hands-on overview of Spring, covering everything from core concepts like dependency injection and REST APIs to advanced topics like transactions, security, and testing.

Introduction

This course covers key Spring topics, including defining beans, dependency injection, configuration properties, AOP, REST API design, and Spring Boot fundamentals. You'll explore transaction management, multithreading, caching, operations tooling, and Spring Security. Optional modules include OAuth2 with Keycloak, messaging, integration testing, Spring Batch, WebSockets, and Spring Integration. The course wraps up with practical scenario discussions and learning resources.

This course is designed for both entry-level developers new to Spring and experienced developers looking to deepen their hands-on knowledge.

Agenda

Spring Container

Defining Beans via component-scanning, @Bean and @Import
Dependency Injection styles, polymorphism, Profiles, @Primary
[optional] Bean Lifecycle @Scope

Configuration Properties

@Value, @ConfigurationProperties, configuration sources

Aspect Oriented Programming

proxy mechanics & pitfalls, writing a custom @Aspect

REST Endpoints:

API design best practices, validation, documentation, exception handling

Spring Boot:

library version management, Auto-configuration/ConditionalOn…

Transaction Management

Database transaction, ACID, Isolation Anomalies
@Transactional propagation, rollback, read-only tx
Performance best practices, [after-tx hooks]
JPA transactional magic: write-behind, flushing, lazy*loading

Multi*threading:

@Scheduled, Spring thread pools, @Async, and non*blocking REST APIs

Caching:

*annotation and programmatic, design tradeoffs and pitfalls

Ops Features:

Spring Actuator, Centralized Logging, Metrics & Traces

Spring Security

Authentication via: login form, basic, api-key, JWT Bearer Token, Preauth Headers,
Authorization via: URL pattern vs annotations, role vs authority, data-security
Spring Security Architecture, Custom Security Filters

Spring OAuth2

Messaging

Listener, Error Handling, Metadata, Spring Cloud Stream (Functional-Style)

Integration Testing - only topics relevant to the team will be covered

Overriding beans and properties
Testing DB interaction vs in*memory/Testcontainered DB, data cleanup strategies
Testing API calls against WireMock
Testing send/receive (Kafka) messages
Testing multi*threaded code
Calling your API with white-box/gray-box/black-box testing, writing testing DSLs, epic tests
Contract Testing: Contract freeze test, Pact or Spring Cloud Contract
Exercise: refactoring a mock-full unit test to an end-to-end system test
Optimizing test execution time: Spring context cache, Slice tests

Spring Batch[optional]:

Tuning Performance: Chunking, Parallel Steps, Parallel chunks

WebSockets [optional]

Spring Integration (IntegrationFlows DSL) [optional]

Wrap-up: brainstorm on real-life scenarios, best learning sources

Victor is a Java Champion, Java Enterprise Architect, and Independent Trainer, delivering intense masterclasses for companies worldwide since 2014. He is passionate about software architecture, clean code, refactoring, and unit testing. He is a regular speaker at top international conferences. He's also the founder of the Bucharest Software Craftsmanship Community with 4000 members.

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