Spring

Overview

• Bean
• Configuration: provide beans
• Autowire: auto create beans depend on
• Component scan: auto discover component create as bean.
• Autoconfiguartion: spring boot can determine what component need to be configured and wired together.

Application

• @SpringBootApplication
• @SpringBootConfiguration
• @EnableAutoConfiguration
• @ComponentScan: @Component, @Controller, @Service

Framework

• core container
• dependency injectionframework.
• spring data: JPA
• security

Web

• RequestMapping, GetMapping etc
• Model: is an object that ferries data between a controller and whatever view is charged with rendering that data.
• PostMapping
  • @Valid and Errors // kotlin need @filed or @get before annotations
• WebMvcConfigurer: shortcut for view without model

Data

• /resources/schema.sql will be execute automaticlly create schema, /resources/data.sql automaticlly create data

JDBC (Java Database Connectivity)

• JdbcTemplate: query
• Model: data class
• ModelRepository: query one and all, save
• @Repository JdbcModelRepository:

JPA (Java Persistence API)

• @Entity data class Model
• @Id, @ManyToMany etc
• @NotNull validation annotation
• CrudRepository: automaticlly implemetion

Security

• alt: shiro

Spring Security

• auto configuration
• WebSecurityConfigurerAdapter: add login form
• User store: override configure
  • in-memory: testing
  • JDBC
  • LDAP
  • custom services
• authentication
  • User: UserDetails
  • getAuthorities

Configuration properties

• environment abstraction

REST

• RestContorller
• @PathVariable: url param
• @RequestBody: body param

Consume REST Api

• RestTemplate: sync
• WebClient: async