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

Example 1 with QueryChange

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

the class QueryEventWorkGeneratorTest method notifyUpdate_isActive.

@Test
public void notifyUpdate_isActive() throws Exception {
    // The signal that will kill the notifying thread.
    final AtomicBoolean shutdownSignal = new AtomicBoolean(false);
    // The queue generated work is offered to.
    final BlockingQueue<QueryEvent> queue = new ArrayBlockingQueue<>(1);
    // The listener that will perform the QueryEventWorkGenerator work.
    final CountDownLatch latch = new CountDownLatch(1);
    latch.countDown();
    final QueryEventWorkGenerator generator = new QueryEventWorkGenerator("rya", latch, queue, 50, TimeUnit.MILLISECONDS, shutdownSignal);
    // A thread that will attempt to notify the generator with an update query change.
    final UUID queryId = UUID.randomUUID();
    final StreamsQuery query = new StreamsQuery(queryId, "query", true, false);
    final Thread notifyThread = new Thread(() -> {
        final QueryChange change = QueryChange.update(queryId, true);
        final ChangeLogEntry<QueryChange> entry = new ChangeLogEntry<>(0, change);
        generator.notify(entry, Optional.of(query));
    });
    // Start the thread.
    notifyThread.start();
    try {
        // Show work was added to the queue and the notifying thread died.
        final QueryEvent event = queue.poll(500, TimeUnit.MILLISECONDS);
        final QueryEvent expected = QueryEvent.executing("rya", new StreamsQuery(queryId, query.getSparql(), query.isActive(), query.isInsert()));
        assertEquals(expected, event);
    } finally {
        shutdownSignal.set(true);
        notifyThread.join();
    }
}

Example 2 with QueryChange

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

the class QueryEventWorkGeneratorTest method notifyDelete.

@Test
public void notifyDelete() throws Exception {
    // The signal that will kill the notifying thread.
    final AtomicBoolean shutdownSignal = new AtomicBoolean(false);
    // The queue generated work is offered to.
    final BlockingQueue<QueryEvent> queue = new ArrayBlockingQueue<>(1);
    // The listener that will perform the QueryEventWorkGenerator work.
    final CountDownLatch latch = new CountDownLatch(1);
    latch.countDown();
    final QueryEventWorkGenerator generator = new QueryEventWorkGenerator("rya", latch, queue, 50, TimeUnit.MILLISECONDS, shutdownSignal);
    // A thread that will attempt to notify the generator with a deleted query.
    final UUID queryId = UUID.randomUUID();
    final Thread notifyThread = new Thread(() -> {
        final QueryChange change = QueryChange.delete(queryId);
        final ChangeLogEntry<QueryChange> entry = new ChangeLogEntry<>(0, change);
        generator.notify(entry, Optional.empty());
    });
    // Start the thread.
    notifyThread.start();
    try {
        // Show work was added to the queue and the notifying thread died.
        final QueryEvent event = queue.poll(500, TimeUnit.MILLISECONDS);
        final QueryEvent expected = QueryEvent.stopped("rya", queryId);
        assertEquals(expected, event);
    } finally {
        shutdownSignal.set(true);
        notifyThread.join();
    }
}

Example 3 with QueryChange

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

the class RunQueryCommandIT method setup.

@Before
public void setup() {
    // Make sure the topic that the change log uses exists.
    final String changeLogTopic = KafkaTopics.queryChangeLogTopic("" + ryaInstance);
    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));
    // Initialize the Statements Producer and the Results Consumer.
    stmtProducer = KafkaTestUtil.makeProducer(kafka, StringSerializer.class, VisibilityStatementSerializer.class);
    resultConsumer = KafkaTestUtil.fromStartConsumer(kafka, StringDeserializer.class, VisibilityBindingSetDeserializer.class);
}

Example 4 with QueryChange

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

the class KafkaQueryChangeLogIT method multipleClients.

@Test
public void multipleClients() throws Exception {
    // Create a second KafkaQueryChangeLog objects that connect to the same change log.
    final Producer<?, QueryChange> producer2 = KafkaTestUtil.makeProducer(rule, StringSerializer.class, QueryChangeSerializer.class);
    final Consumer<?, QueryChange> consumer2 = KafkaTestUtil.fromStartConsumer(rule, StringDeserializer.class, QueryChangeDeserializer.class);
    try (final KafkaQueryChangeLog changeLog2 = new KafkaQueryChangeLog(producer2, consumer2, topic)) {
        // Show both of them report empty.
        assertFalse(changeLog.readFromStart().hasNext());
        assertFalse(changeLog2.readFromStart().hasNext());
        // Write a change to the first log.
        final QueryChange change = QueryChange.create(UUID.randomUUID(), "query", true, false);
        changeLog.write(change);
        // Show it's in the first log.
        assertEquals(change, changeLog.readFromStart().next().getEntry());
        // Show it is also seen in the second log.
        assertEquals(change, changeLog2.readFromStart().next().getEntry());
    }
}

Example 5 with QueryChange

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

the class KafkaQueryChangeLogIT method readFromPosition_positionStartsBegining.

@Test
public void readFromPosition_positionStartsBegining() throws Exception {
    final List<QueryChange> expected = write10ChangesToChangeLog().subList(5, 10);
    // set the position to some non-0 position
    final TopicPartition partition = new TopicPartition(topic, 0);
    consumer.assign(Lists.newArrayList(partition));
    consumer.seekToBeginning(Lists.newArrayList(partition));
    final CloseableIteration<ChangeLogEntry<QueryChange>, QueryChangeLogException> iter = changeLog.readFromPosition(5L);
    final List<QueryChange> actual = new ArrayList<>();
    while (iter.hasNext()) {
        final ChangeLogEntry<QueryChange> entry = iter.next();
        actual.add(entry.getEntry());
    }
    assertEquals(expected, actual);
}