This version is still in development and is not considered stable yet. For the latest stable version, please use Spring Data KeyValue 3.5.5!

Map Repositories

Map repositories reside on top of the KeyValueTemplate. Using the default PredicateQueryCreator allows deriving query and sort expressions from the given method name, as the following example shows:

@Configuration
@EnableMapRepositories
class KeyValueConfig {

}

interface PersonRepository implements CrudRepository<Person, String> {
    List<Person> findByLastname(String lastname);
}

Configuring the QueryEngine

It is possible to change the QueryEngine and use a custom one instead of the default. The EnableMapRepositories annotation allows to configure the by supplying a QueryEngineFactory as well as the QueryCreator via according attributes. Please mind that the QueryEngine needs to be able to process queries created by the configured QueryCreator.

Storage Backend Configuration

KeySpaceStore provides a simple storage facade that can be used along with the keySpaceStoreRef attribute of EnableMapRepositories to set the bean reference to the actual storage, overriding mapType settings.

@Configuration
@EnableMapRepositories(keySpaceStoreRef = "store") (1)
public class MapDbConfiguration {

	@Bean
	KeySpaceStore store(DB db) { (1)

		return new KeySpaceStore() {

			@Override
			public Map<Object, Object> getKeySpace(String keyspace) {
				return db.hashMap(keyspace, ...
			}

			@Override
			public void clear() {
				//
			}

		};
	}

}

1	reference the `KeySpaceStore` by bean name.