HiveDB | an Open Source framework for horizontally partitioning MySQL systems

» Hibernate Support

This is where the bulk of the work for this release has gone. We now directly integrate with Hibernate using Hibernate Shards. Writing an application with HiveDB is as easy as using Hibernate.

List entityClasses = Lists.newList(Continent.class, WeatherReport.class, WeatherEvent.class);
ShardAccessStrategy strategy = new SequentialShardAccessStrategy();
HiveSessionFactory factoryBuilder = new HiveSessionFactoryBuilderImpl( hiveUri, entityClasses, strategy);
WeatherReport report = new WeatherReport();
...
Session session = factoryBuilder.openSession();
Transaction tx = null;
try {
	tx = session.beginTransaction();
	session.saveOrUpdate(report);
} catch( RuntimeException e ) {
	if(tx != null)
		tx.rollback();
} finally {
	session.close();
}

» Simple configuration and installation using Java Annotations

We created automated configuration an installation of the Hive. You can decorate you entity classes or interfaces with our annotations and ConfigurationReader will process them and create the required Hive resources and indexes.

@Resource("WeatherReport")
public interface WeatherReport {
    @PartitionIndex
    String getContinent();

    @EntityId
    Integer getReportId();

    @Index
    Integer getRegionCode();

    @Index(type=IndexType.Data)
    Double getLatitude();

    @Index(type=IndexType.Data)
    Double getLongitude();

    int getTemperature();
}

Just pass the annotated classes into the ConfigurationReader and call install() and your hive is ready to go.

ConfigurationReader reader  = new ConfigurationReader(WeatherReport.class);
reader.install(hiveUri);

» More compact and flexible directory layout

We have added relationships between entities into the directory removing the need for redundant secondary indexes.

» Automated Indexing for Hive entities

If you have annotated your entity classes you can use the HiveIndexer to automatically add or update entries in the directory. Or if you are using Hibernate the HiveSessionFactory will automatically index anything that you save or update.