reactive-couchbase's Introduction

reactive-couchbase

Spring Data Couchbase is currently using the synchronous Couchbase Java SDK 1.x. Java SDK 2 offers batching which greatly improves the performances: http://docs.couchbase.com/developer/java-2.1/documents-bulk.html

But the Java SDK 2.x is pretty low level. It lakes a high level repository like Spring Data, while Spring Data lakes Asynchronous operations on Observables. This Couchbase repository implementation tries to fit both worlds:

Asynchronous through RxJava,
High level API which is easy to use.

Pre-requisites:

Maven
Java JDK 8
Lombok (see http://projectlombok.org/)

Observable Couchbase repository made easy:

final AsyncRepositoryFactory factory = ...;
final AsyncRepository<Person> repository = factory.create(Person.class);

// findAll() returns Observable<Person>
repository.findAll().forEach(person -> System.out.println(person.getFirstname()));

As well as sequential repository:

final SyncRepositoryFactory factory = ...;
final SyncRepository<Person> repository = factory.create(Person.class);

final List<Person> persons = repository.findAll();

Person entity using Jackson Json processor:

@Value
@Builder
public class Person implements ReactiveEntity {
  String id;
  String firstname;
  String lastname;

  @JsonCreator
  Person(
      @JsonProperty("id") final String id,
      @JsonProperty("firstname") final String firstname,
      @JsonProperty("lastname") final String lastname) {
    super();
    this.id = checkNotNull(id);
    this.firstname = checkNotNull(firstname);
    this.lastname = checkNotNull(lastname);
  }
}

Spring Configuration:

@Configuration
public class CouchbaseConfig {

  @Bean
  @Autowired
  ASyncRepository<Person> asyncPersonRepository(final ASyncRepositoryFactory factory) {
    return factory.create(Person.class);
  }
  
  @Bean
  @Autowired
  SyncRepository<Person> syncPersonRepository(final SyncRepositoryFactory factory) {
    return factory.create(Person.class);
  }
}

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