Examples with QueryChange org.apache.rya.streams.api.queries.QueryChange used on opensource projects

Example 16 with QueryChange

use of org.apache.rya.streams.api.queries.QueryChange in project incubator-rya by apache.

the class KafkaQueryChangeLogIT method write10ChangesToChangeLog.

private List<QueryChange> write10ChangesToChangeLog() throws Exception {
    final List<QueryChange> changes = new ArrayList<>();
    for (int ii = 0; ii < 10; ii++) {
        final String sparql = "SOME QUERY HERE_" + ii;
        final UUID uuid = UUID.randomUUID();
        final QueryChange newChange = QueryChange.create(uuid, sparql, true, false);
        changeLog.write(newChange);
        changes.add(newChange);
    }
    return changes;
}

Example 17 with QueryChange

use of org.apache.rya.streams.api.queries.QueryChange in project incubator-rya by apache.

the class DeleteQueryCommandIT method setup.

@Before
public void setup() {
    // Make sure the topic that the change log uses exists.
    final String changeLogTopic = KafkaTopics.queryChangeLogTopic(ryaInstance);
    System.out.println("Test Change Log Topic: " + changeLogTopic);
    kafka.createTopic(changeLogTopic);
    // Setup the QueryRepository used by the test.
    final Producer<?, QueryChange> queryProducer = KafkaTestUtil.makeProducer(kafka, StringSerializer.class, QueryChangeSerializer.class);
    final Consumer<?, QueryChange> queryConsumer = KafkaTestUtil.fromStartConsumer(kafka, StringDeserializer.class, QueryChangeDeserializer.class);
    final QueryChangeLog changeLog = new KafkaQueryChangeLog(queryProducer, queryConsumer, changeLogTopic);
    queryRepo = new InMemoryQueryRepository(changeLog, Scheduler.newFixedRateSchedule(0L, 5, TimeUnit.SECONDS));
}

Example 18 with QueryChange

use of org.apache.rya.streams.api.queries.QueryChange 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);
            }
        }
    };
}