Tutorial: connecting to Cassandra using Spring Boot and spring-data-cassandra.

Starting version 1.3, Spring Boot supports Cassandra auto configuration. That made using spring-cassandra-data even easier.

Prerequisites:

•    Configured Spring Boot project version 1.3 or higher.
•    Cassandra instance. On this instance, create a keyspace movies and in it table movie: 

       Create table movie:

CREATE TABLE movie (
  movieid text,
  name text,
  PRIMARY KEY ((movieid))
)

     and insert a couple of rows:

   insert into movie(movieid, name) values('id1', 'Star Wars');
   insert into movie(movieid, name) values('id2', 'Casablanca');

1. Add spring-data-cassandra dependency for Spring Boot:

   <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-cassandra</artifactId>
    </dependency>

2. Create a Java Bean with mapping to cassandra table:

@Table
public class Movie {
    @PrimaryKey
    private String movieid;

    @Column
    private String name;

        // add getters, setters, equals, hashCode

}

3.  Create Repository Interface for your bean:

 public interface MovieRepository extends TypedIdCassandraRepository<Movie,String> {
}

4.  Add basic  RestController which can be expanded on later:

@RestController
public class MovieController {
    @Autowired
    MovieRepository movieRepository;

    @RequestMapping(value="/movies")
    public Iterable<Movie> getTable1(){
        return movieRepository.findAll();
    }

}

5.  Update resources/application.properties with Cassandra connection details:

spring.data.cassandra.keyspace-name=...
spring.data.cassandra.contact-points=...
spring.data.cassandra.port=...

6.  Add mappingContext bean to your configuration with the package with mapped beans:

    @Bean
    public CassandraMappingContext mappingContext() throws Exception {
        BasicCassandraMappingContext bean = new BasicCassandraMappingContext();
        bean.setInitialEntitySet(CassandraEntityClassScanner.scan(("yourpackage")));

        return bean;
    }

7. Run your app. You should see the following at localhost:8080/movies:

[
  {
    "movieid": "id1",
    "name": "Star Wars"
  },
  {
    "movieid": "id2",
    "name": "Casablanca"
  }
]