This document discusses Spring topics related to beans, annotations, and dependency injection. It covers bean scopes like singleton and prototype, common annotations like @Component, @Service, and @Repository, dependency injection annotations like @Autowired and @Qualifier, options for dependency injection configuration through XML or annotations, and bean lifecycle methods using XML init/destroy or annotation equivalents @PostConstruct and @PreDestroy.

1. SPRING – TOPICS
Diogo Salaberri

2. BEANS SCOPE
 Singleton
 One instance;
 Shared Beans;
 Don’t hold state;
 Prototype
 Many instances;
 More memory costs;
 Hold state;

3. ANNOTATIONS
 @Component
 Defines a Bean;
 @Service
 Defines a Service Bean;
 @Repository
 Defines a Repository Bean

4. ANNOTATIONS
 @Autowired
 Defines a Dependency;
 Required True / False;
 @Qualifier
 Guide on a Dependency Injection;

5. DEPENDENCY INJECTION
ANNOTATIONS OR XML
 XML
 One point to control injections;
 Extensibility;
 Increase mistakes chances (Typing/Configurations);
 Annotations
 Productivity;
 Practicity;
 Simplicity;

6. BEAN LIFECYCLE
 XML
 init-method property
 Some preparations
 destroy-method property
 Clean up work
 Annotation
 @PostConstruct
 Some preparations
 @PreDestroy
 Clean up work

7. SPRING – TOPICS - OBRIGADO
Diogo Bonoto Salaberri