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

Example 1 with DefaultAddQuery

use of org.apache.rya.streams.api.interactor.defaults.DefaultAddQuery 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);
            }
        }
    };
}

Example 2 with DefaultAddQuery

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

the class AddQueryCommand method execute.

@Override
public void execute(final String[] args) throws ArgumentsException, ExecutionException {
    requireNonNull(args);
    // Parse the command line arguments.
    final AddParameters params = new AddParameters();
    try {
        new JCommander(params, args);
    } catch (final ParameterException e) {
        throw new ArgumentsException("Could not add a new query because of invalid command line parameters.", e);
    }
    // Create the Kafka backed QueryChangeLog.
    final String bootstrapServers = params.kafkaIP + ":" + params.kafkaPort;
    final String topic = KafkaTopics.queryChangeLogTopic(params.ryaInstance);
    final QueryChangeLog queryChangeLog = KafkaQueryChangeLogFactory.make(bootstrapServers, topic);
    // The AddQuery command doesn't use the scheduled service feature.
    final Scheduler scheduler = Scheduler.newFixedRateSchedule(0L, 5, TimeUnit.SECONDS);
    final QueryRepository queryRepo = new InMemoryQueryRepository(queryChangeLog, scheduler);
    // Execute the add query command.
    try {
        final AddQuery addQuery = new DefaultAddQuery(queryRepo);
        try {
            final Boolean isActive = Boolean.parseBoolean(params.isActive);
            final Boolean isInsert = Boolean.parseBoolean(params.isInsert);
            // If the query's results are meant to be written back to Rya, make sure it creates statements.
            if (isInsert) {
                final boolean isConstructQuery = QueryInvestigator.isConstruct(params.query);
                final boolean isInsertQuery = QueryInvestigator.isInsertWhere(params.query);
                if (isConstructQuery) {
                    System.out.println("WARNING: CONSTRUCT is part of the SPARQL Query API, so they do not normally\n" + "get written back to the triple store. Consider using an INSERT, which is\n" + "part of the SPARQL Update API, in the future.");
                }
                if (!(isConstructQuery || isInsertQuery)) {
                    throw new ArgumentsException("Only CONSTRUCT queries and INSERT updates may be inserted back to the triple store.");
                }
            }
            final StreamsQuery query = addQuery.addQuery(params.query, isActive, isInsert);
            System.out.println("Added query: " + query.getSparql());
        } catch (final RyaStreamsException e) {
            throw new ExecutionException("Unable to add the query to Rya Streams.", e);
        }
    } catch (final MalformedQueryException e) {
        throw new ArgumentsException("Could not parse the provided query.", e);
    }
}