Library6: ThymeLeaf Web Project RestTemplate (data from API Rest)

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ThymeLeaf Web Project RestTemplate (data from API Rest)

Base project

• Base project:

  • @Entity book from Library1 and JPA-H2: library6server
  • POJO book from Library5 and TH: library6client
  • POM
  • ThymeLeaf dependency
  • DataBase H2: Library6server
    • First-time CREATE DDL : First-time CREATE DDL option (after that UPDATE) in application.properties
  • Application.properties
  • @Service, @CrudRepository JPA 2.0
  • @Test JUnit Jupiter

• To work from base-project

  • Architectrure Server (Spring Boot) <API REST> Client (Spring Boot)
  • RestTemplate class :** Synchronous client to perform HTTP requests**, exposing a simple, template method API over underlying HTTP client libraries such as:
    • the JDK HttpURLConnection,
    • Apache HttpComponents,
    • ReponseEntity,
    • HttpEntity
    • and others.
  • WebClient to replace RestTemplate : on-blocking, reactive client to perform HTTP requests, exposing a fluent, reactive API over underlying HTTP client libraries such as Reactor Netty.

New tools

• Architectrure : both Spring Boot projects, different ports: 8080/8086

  

• RestTemplate :

      public Iterable<Book> getAllBooks() {
  
          ResponseEntity<List<Book>> response = restTemplate.exchange(
             "http://localhost:8080/api/books", HttpMethod.GET,
             null,
             new ParameterizedTypeReference<List<Book>>() {
              });
  
          List<Book> books = response.getBody();
       return books;
       }
  

Versions

• version 1.0 : very basic project Server

• version 1.0 : very basic project Client

• version 1.1 : create and update at client