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Adding Spring Data to an existing Spring Boot application

Pragya Keshap answered on February 11, 2023 Popularity 2/10 Helpfulness 1/10

answer Adding Spring Data to an existing Spring Boot application

Adding Spring Data to an existing Spring Boot application

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Redis is principally built as a key/value data store. It’s very fast and very effective at storing huge amounts of key/value data. On top of that, it has sophisticated statistical analysis, time-to-live, and functions.

MongoDB is a document store. It can store multiple levels of nested documents. It also has the ability to create pipelines that process documents and generate aggregated data.

Apache Cassandra provides a table-like structure but has the ability to control consistency as a trade-off with performance.

@SpringBootApplication
public class AccessingDataJpaApplication {

  private static final Logger log = LoggerFactory.getLogger(AccessingDataJpaApplication.class);

  public static void main(String[] args) {
    SpringApplication.run(AccessingDataJpaApplication.class);
  }

  @Bean
  public CommandLineRunner demo(CustomerRepository repository) {
    return (args) -> {
      // save a few customers
      repository.save(new Customer("Jack", "Bauer"));
      repository.save(new Customer("Chloe", "O'Brian"));
      repository.save(new Customer("Kim", "Bauer"));
      repository.save(new Customer("David", "Palmer"));
      repository.save(new Customer("Michelle", "Dessler"));

      // fetch all customers
      log.info("Customers found with findAll():");
      log.info("-------------------------------");
      for (Customer customer : repository.findAll()) {
        log.info(customer.toString());
      }
      log.info("");

      // fetch an individual customer by ID
      Customer customer = repository.findById(1L);
      log.info("Customer found with findById(1L):");
      log.info("--------------------------------");
      log.info(customer.toString());
      log.info("");

      // fetch customers by last name
      log.info("Customer found with findByLastName('Bauer'):");
      log.info("--------------------------------------------");
      repository.findByLastName("Bauer").forEach(bauer -> {
        log.info(bauer.toString());
      });
      // for (Customer bauer : repository.findByLastName("Bauer")) {
      //  log.info(bauer.toString());
      // }
      log.info("");
    };
  }

}

https://spring.io/guides/gs/accessing-data-jpa/

Popularity 2/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java spring-boot spring-data

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Contributed on Feb 11 2023

Pragya Keshap

0 Answers Avg Quality 2/10

Adding Spring Data to an existing Spring Boot application

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