How to use

StreamsQuery

in

org.apache.rya.streams.api.entity

/**
 * Pretty formats a {@link StreamsQuery}.
 *
 * @param query - The query to format. (not null)
 * @return The pretty formatted string.
 * @throws Exception A problem was encountered while pretty formatting the SPARQL.
 */
public static String format(final StreamsQuery query) throws Exception {
  requireNonNull(query);
  // Pretty format the SPARQL query.
  final ParsedQuery parsedQuery = new SPARQLParser().parseQuery(query.getSparql(), null);
  final String prettySparql = new SPARQLQueryRenderer().render(parsedQuery);
  final String[] lines = prettySparql.split("\n");
  // Create the formatted string.
  query.getQueryId();
  query.isActive();
  String.format(" QueryId: %s", query.getQueryId());
  final StringBuilder builder = new StringBuilder();
  builder.append(" Query ID: ").append( query.getQueryId() ) .append("\n");
  builder.append("Is Active: ").append( query.isActive() ).append("\n");
  builder.append("Is Insert: ").append( query.isInsert() ).append("\n");
  builder.append("   SPARQL: ").append( lines[0] ).append("\n");
  for(int i = 1; i < lines.length; i++) {
    builder.append("           ").append(lines[i]).append("\n");
  }
  return builder.toString();
}

private void append(final StringBuilder string, final StreamsQuery query) {
  requireNonNull(string);
  requireNonNull(query);
  string.append("    Streams Query {\n")
     .append("        Query ID: ").append(query.getQueryId()).append(",\n")
     .append("        Is Active: ").append(query.isActive()).append(",\n")
     .append("        SPARQL: ").append(query.getSparql()).append("\n")
     .append("    }");
}

  @Override
  public KafkaStreams make(final String ryaInstance, final StreamsQuery query) throws KafkaStreamsFactoryException {
    requireNonNull(ryaInstance);
    requireNonNull(query);

    // Setup the Kafka Stream program.
    final Properties streamsProps = new Properties();

    // Configure the Kafka servers that will be talked to.
    streamsProps.setProperty(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServersConfig);

    // Use the Query ID as the Application ID to ensure we resume where we left off the last time this command was run.
    streamsProps.put(StreamsConfig.APPLICATION_ID_CONFIG, "RyaStreams-Query-" + query.getQueryId());

    // Always start at the beginning of the input topic.
    streamsProps.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");

    // Setup the topology that processes the Query.
    final String statementsTopic = KafkaTopics.statementsTopic(ryaInstance);
    final String resultsTopic = KafkaTopics.queryResultsTopic(ryaInstance, query.getQueryId());

    try {
      final TopologyBuilder topologyBuilder = topologyFactory.build(query.getSparql(), statementsTopic, resultsTopic, new RandomUUIDFactory());
      return new KafkaStreams(topologyBuilder, new StreamsConfig(streamsProps));
    } catch (final MalformedQueryException | TopologyBuilderException e) {
      throw new KafkaStreamsFactoryException("Could not create a KafkaStreams processing topology for query " + query.getQueryId(), e);
    }
  }
}

final StreamsQuery query = new StreamsQuery(
    queryId,
    change.getSparql().get(),
if(queriesCache.containsKey(queryId)) {
  final StreamsQuery old = queriesCache.get(queryId);
  final StreamsQuery updated = new StreamsQuery(
      old.getQueryId(),
      old.getSparql(),
      change.getIsActive().get(),
      old.isInsert());
  queriesCache.put(queryId, updated);

final StreamsQuery query = new StreamsQuery(
    queryId,
    change.getSparql().get(),
if(queriesCache.containsKey(queryId)) {
  final StreamsQuery old = queriesCache.get(queryId);
  final StreamsQuery updated = new StreamsQuery(
      old.getQueryId(),
      old.getSparql(),
      change.getIsActive().get());
  queriesCache.put(queryId, updated);

  log.info("Rya Instance " + ryaInstance + " created Rya Streams query " + newQueryState + ".");
  final StreamsQuery newQuery = newQueryState.get();
  if(newQuery.isActive()) {
    final QueryEvent executeNewQuery = QueryEvent.executing(ryaInstance, newQuery);
    offerUntilAcceptedOrShutdown(queryWorkQueue, executeNewQuery, blockingValue, blockingUnits, shutdownSignal);
if(newQueryState.isPresent()) {
  final StreamsQuery updatedQuery = newQueryState.get();
  if(updatedQuery.isActive()) {
    log.info("Rya Instance " + ryaInstance + " updated Rya Streams query with ID " +
        updatedQuery.getQueryId() + " to be active.");
    final QueryEvent executeUpdatedQuery = QueryEvent.executing(ryaInstance, updatedQuery);
    offerUntilAcceptedOrShutdown(queryWorkQueue, executeUpdatedQuery, blockingValue, blockingUnits, shutdownSignal);
  } else {
    log.info("Rya Instance " + ryaInstance + " updated Rya Streams query with ID " +
        updatedQuery.getQueryId() + " to be inactive.");
    final QueryEvent stopUpdatedQuery = QueryEvent.stopped(ryaInstance, updatedQuery.getQueryId());
    offerUntilAcceptedOrShutdown(queryWorkQueue, stopUpdatedQuery, blockingValue, blockingUnits, shutdownSignal);

  final String id1 = query1.getQueryId().toString();
  final String id2 = query2.getQueryId().toString();
  return id1.compareTo(id2);
});

final String sparql = query.get().getSparql();
final TopologyBuilder topologyBuilder;
try {

@CliCommand(value = STREAM_QUERIES_START_CMD, help = "Start processing a SPARQL query using the Rya Streams subsystem.")
public String startQuery(
    @CliOption(key= {"queryId"}, mandatory = true, help = "The ID of the query to start processing.")
    final String queryId) {
  final RyaStreamsClient streamsClient = state.getShellState().getRyaStreamsCommands().get();
  try {
    // Ensure the query exists.
    final UUID id = UUID.fromString(queryId);
    final java.util.Optional<StreamsQuery> streamsQuery = streamsClient.getGetQuery().getQuery(id);
    if(!streamsQuery.isPresent()) {
      throw new RuntimeException("No Rya Streams query exists for ID " + queryId);
    }
    // Ensure it isn't already started.
    if(streamsQuery.get().isActive()) {
      return "That query is already running.";
    }
    // Start it.
    streamsClient.getStartQuery().start(id);
    return "The query will be processed by the Rya Streams subsystem.";
  } catch (final RyaStreamsException e) {
    throw new RuntimeException("Unable to start the Query.", e);
  }
}

.forEach(query -> {
  final QueryEvent queryEvent = query.isActive() ?
      QueryEvent.executing(ryaInstance, query) : QueryEvent.stopped(ryaInstance, query.getQueryId());
  log.debug("LogEventWorker - offering: " + queryEvent);

@Override
public void startQuery(final String ryaInstance, final StreamsQuery query) throws QueryExecutorException {
  requireNonNull(ryaInstance);
  requireNonNull(query);
  checkState(state() == State.RUNNING, "The service must be RUNNING to execute this method.");
  lock.lock();
  try {
    // Make sure the Statements topic exists for the query.
    final Set<String> topics = Sets.newHashSet(
        KafkaTopics.statementsTopic(ryaInstance),
        KafkaTopics.queryResultsTopic(ryaInstance, query.getQueryId()));
    // Make sure the Query Results topic exists for the query.
    // Since this is running in the JVM, the properties are left empty
    //   so the cleanup.policy will default to delete to reduce memory usage.
    createKafkaTopic.createTopics(topics, 1, 1, Optional.empty());
    // Setup the Kafka Streams job that will execute.
    final KafkaStreams streams = streamsFactory.make(ryaInstance, query);
    streams.start();
    // Mark which Rya Instance the Query ID is for.
    ryaInstanceById.put(query.getQueryId(), ryaInstance);
    // Add the Query ID to the collection of running queries for the Rya instance.
    idByRyaInstance.put(ryaInstance, query.getQueryId());
    // Add the running Kafka Streams job for the Query ID.
    byQueryId.put(query.getQueryId(), streams);
  } catch (final KafkaStreamsFactoryException e) {
    throw new QueryExecutorException("Could not start query " + query.getQueryId(), e);
  } finally {
    lock.unlock();
  }
}

@CliCommand(value = STREAM_QUERIES_STOP_CMD, help = "Stop processing a SPARQL query using the Rya Streams subsystem.")
public String stopQuery(
    @CliOption(key= {"queryId"}, mandatory = true, help = "The ID of the query to stop processing.")
    final String queryId) {
  final RyaStreamsClient streamsClient = state.getShellState().getRyaStreamsCommands().get();
  try {
    // Ensure the query exists.
    final UUID id = UUID.fromString(queryId);
    final java.util.Optional<StreamsQuery> streamsQuery = streamsClient.getGetQuery().getQuery(id);
    if(!streamsQuery.isPresent()) {
      throw new RuntimeException("No Rya Streams query exists for ID " + queryId);
    }
    // Ensure it isn't already stopped.
    if(!streamsQuery.get().isActive()) {
      return "That query is already stopped.";
    }
    // Stop it.
    streamsClient.getStopQuery().stop(id);
    return "The query will no longer be processed by the Rya Streams subsystem.";
  } catch (final RyaStreamsException e) {
    throw new RuntimeException("Unable to start the Query.", e);
  }
}

return "The added query's ID is " + streamsQuery.getQueryId();