Examples with DefaultStartQuery org.apache.rya.streams.api.interactor.defaults.DefaultStartQuery used on opensource projects

Example 1 with DefaultStartQuery

use of org.apache.rya.streams.api.interactor.defaults.DefaultStartQuery in project incubator-rya by apache.

the class KafkaRyaStreamsClientFactory method make.

/**
 * Initialize a {@link RyaStreamsClient} that will interact with an instance of Rya Streams
 * that is backed by Kafka.
 *
 * @param ryaInstance - The name of the Rya Instance the client is connected to. (not null)
 * @param kafkaHostname - The hostname of the Kafka Broker.
 * @param kafkaPort - The port of the Kafka Broker.
 * @return The initialized commands.
 */
public static RyaStreamsClient make(final String ryaInstance, final String kafkaHostname, final int kafkaPort) {
    requireNonNull(ryaInstance);
    requireNonNull(kafkaHostname);
    // Setup Query Repository used by the Kafka Rya Streams subsystem.
    final Producer<?, QueryChange> queryProducer = makeProducer(kafkaHostname, kafkaPort, StringSerializer.class, QueryChangeSerializer.class);
    final Consumer<?, QueryChange> queryConsumer = fromStartConsumer(kafkaHostname, kafkaPort, StringDeserializer.class, QueryChangeDeserializer.class);
    final String changeLogTopic = KafkaTopics.queryChangeLogTopic(ryaInstance);
    final QueryChangeLog changeLog = new KafkaQueryChangeLog(queryProducer, queryConsumer, changeLogTopic);
    final QueryRepository queryRepo = new InMemoryQueryRepository(changeLog, SCHEDULER);
    // Create the Rya Streams client that is backed by a Kafka Query Change Log.
    return new RyaStreamsClient(new DefaultAddQuery(queryRepo), new DefaultGetQuery(queryRepo), new DefaultDeleteQuery(queryRepo), new KafkaGetQueryResultStream<>(kafkaHostname, "" + kafkaPort, VisibilityStatementDeserializer.class), new KafkaGetQueryResultStream<>(kafkaHostname, "" + kafkaPort, VisibilityBindingSetDeserializer.class), new DefaultListQueries(queryRepo), new DefaultStartQuery(queryRepo), new DefaultStopQuery(queryRepo)) {

        /**
         * Close the QueryRepository used by the returned client.
         */
        @Override
        public void close() {
            try {
                queryRepo.stopAndWait();
            } catch (final Exception e) {
                log.warn("Couldn't close a QueryRepository.", e);
            }
        }
    };
}