使用 Spring 连接到 Cassandra

@Configuration
public class AppConfig {

	/*
	 * Use the standard Cassandra driver API to create a com.datastax.oss.driver.api.core.CqlSession instance.
	 */
	public @Bean CqlSession session() {
		return CqlSession.builder().withKeyspace("mykeyspace").build();
	}
}

@Configuration
public class FactoryBeanAppConfig {

	/*
	 * Factory bean that creates the com.datastax.oss.driver.api.core.CqlSession instance
	 */
	@Bean
	public CqlSessionFactoryBean session() {

		CqlSessionFactoryBean session = new CqlSessionFactoryBean();
		session.setContactPoints("localhost");
		session.setKeyspaceName("mykeyspace");

		return session;
	}
}

@Configuration
@EnableCassandraRepositories(basePackages = { "org.springframework.data.cassandra.example" })
public class CassandraConfig {

	@Bean
	public CqlSessionFactoryBean session() {

		CqlSessionFactoryBean session = new CqlSessionFactoryBean();
		session.setContactPoints("localhost");
		session.setKeyspaceName("mykeyspace");

		return session;
	}

	@Bean
	public SessionFactoryFactoryBean sessionFactory(CqlSession session, CassandraConverter converter) {

		SessionFactoryFactoryBean sessionFactory = new SessionFactoryFactoryBean();
		sessionFactory.setSession(session);
		sessionFactory.setConverter(converter);
		sessionFactory.setSchemaAction(SchemaAction.NONE);

		return sessionFactory;
	}

	@Bean
	public CassandraMappingContext mappingContext() {
		return new CassandraMappingContext();
	}

	@Bean
	public CassandraConverter converter(CqlSession cqlSession, CassandraMappingContext mappingContext) {

		MappingCassandraConverter cassandraConverter = new MappingCassandraConverter(mappingContext);
		cassandraConverter.setUserTypeResolver(new SimpleUserTypeResolver(cqlSession));

		return cassandraConverter;
	}

	@Bean
	public CassandraOperations cassandraTemplate(SessionFactory sessionFactory, CassandraConverter converter) {
		return new CassandraTemplate(sessionFactory, converter);
	}
}

@Configuration
public class CassandraConfiguration extends AbstractCassandraConfiguration {

	/*
	 * Provide a contact point to the configuration.
	 */
	@Override
	public String getContactPoints() {
		return "localhost";
	}

	/*
	 * Provide a keyspace name to the configuration.
	 */
	@Override
	public String getKeyspaceName() {
		return "mykeyspace";
	}
}

@Configuration
public class CustomizedCassandraConfiguration extends AbstractCassandraConfiguration {

	/*
	 * Customize the CqlSession through CqlSessionBuilder.
	 */
	@Override
	protected SessionBuilderConfigurer getSessionBuilderConfigurer() {

		Path connectBundlePath = …;

		return builder -> builder
				.withCloudSecureConnectBundle(Path.of(connectBundlePath));
	}

	/*
	 * Provide a keyspace name to the configuration.
	 */
	@Override
	public String getKeyspaceName() {
		return "mykeyspace";
	}

}