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

Example 6 with ChangeLogEntry

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

the class QueryEventWorkGeneratorTest method notifyUpdate_isNotActive.

@Test
public void notifyUpdate_isNotActive() 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", false, false);
    final Thread notifyThread = new Thread(() -> {
        final QueryChange change = QueryChange.update(queryId, false);
        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.stopped("rya", queryId);
        assertEquals(expected, event);
    } finally {
        shutdownSignal.set(true);
        notifyThread.join();
    }
}

Example 7 with ChangeLogEntry

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

the class QueryEventWorkGeneratorTest method notifyCreate.

@Test
public void notifyCreate() 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 created query.
    final UUID queryId = UUID.randomUUID();
    final StreamsQuery query = new StreamsQuery(queryId, "query", true, false);
    final Thread notifyThread = new Thread(() -> {
        final QueryChange change = QueryChange.create(queryId, query.getSparql(), query.isActive(), query.isInsert());
        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 8 with ChangeLogEntry

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

the class QueryEventWorkGeneratorTest method waitsForSubscriptionWork.

@Test
public void waitsForSubscriptionWork() 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);
    final QueryEventWorkGenerator generator = new QueryEventWorkGenerator("rya", latch, queue, 50, TimeUnit.MILLISECONDS, shutdownSignal);
    // A thread that will attempt to notify the generator with a created query.
    final UUID queryId = UUID.randomUUID();
    final StreamsQuery query = new StreamsQuery(queryId, "query", true, false);
    final Thread notifyThread = new Thread(() -> {
        final QueryChange change = QueryChange.create(queryId, query.getSparql(), query.isActive(), query.isInsert());
        final ChangeLogEntry<QueryChange> entry = new ChangeLogEntry<>(0, change);
        generator.notify(entry, Optional.of(query));
    });
    // Start the thread.
    notifyThread.start();
    try {
        // Wait longer than the blocking period and show the thread is still alive and nothing has been added
        // to the work queue.
        Thread.sleep(150);
        assertTrue(notifyThread.isAlive());
        // Count down the latch.
        latch.countDown();
        // 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 9 with ChangeLogEntry

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

the class KafkaQueryChangeLogIT method readFromPosition_positionStartsEnd.

@Test
public void readFromPosition_positionStartsEnd() throws Exception {
    write10ChangesToChangeLog();
    // set the position to some non-0 position
    final TopicPartition partition = new TopicPartition(topic, 0);
    consumer.assign(Lists.newArrayList(partition));
    consumer.seekToEnd(Lists.newArrayList(partition));
    final CloseableIteration<ChangeLogEntry<QueryChange>, QueryChangeLogException> iter = changeLog.readFromPosition(10L);
    int count = 0;
    while (iter.hasNext()) {
        // should be empty
        iter.next();
        count++;
    }
    assertEquals(0, count);
}