Examples with EventJournalInitialSubscriberState com.hazelcast.internal.journal.EventJournalInitialSubscriberState used on opensource projects

Example 6 with EventJournalInitialSubscriberState

use of com.hazelcast.internal.journal.EventJournalInitialSubscriberState in project hazelcast by hazelcast.

the class AbstractEventJournalBasicTest method allowReadingWithFutureSeq.

@Test
public void allowReadingWithFutureSeq() throws Exception {
    final EventJournalTestContext<String, Integer, EJ_TYPE> context = createContext();
    final EventJournalInitialSubscriberState state = subscribeToEventJournal(context.dataAdapter, partitionId);
    assertEquals(0, state.getOldestSequence());
    assertEquals(-1, state.getNewestSequence());
    assertEventJournalSize(context.dataAdapter, 0);
    final Integer value = RANDOM.nextInt();
    final CountDownLatch latch = new CountDownLatch(1);
    final int startSequence = 1;
    final BiConsumer<ReadResultSet<EJ_TYPE>, Throwable> callback = (response, t) -> {
        if (t == null) {
            latch.countDown();
            assertEquals(1, response.size());
            final EventJournalEventAdapter<String, Integer, EJ_TYPE> journalAdapter = context.eventJournalAdapter;
            final EJ_TYPE e = response.get(0);
            assertEquals(ADDED, journalAdapter.getType(e));
            assertEquals(value, journalAdapter.getNewValue(e));
        } else {
            rethrow(t);
        }
    };
    CompletionStage<ReadResultSet<EJ_TYPE>> callbackStage = readFromEventJournal(context.dataAdapter, startSequence, 1, partitionId, TRUE_PREDICATE, IDENTITY_FUNCTION).whenCompleteAsync(callback);
    assertTrueEventually(() -> {
        context.dataAdapter.put(randomPartitionKey(), value);
        assertTrue(latch.await(200, TimeUnit.MILLISECONDS));
    }, 30);
    // ensure no exception thrown from callback
    callbackStage.toCompletableFuture().join();
}

Example 7 with EventJournalInitialSubscriberState

use of com.hazelcast.internal.journal.EventJournalInitialSubscriberState in project hazelcast by hazelcast.

the class ClientCacheProxy method onInitialize.

@Override
protected void onInitialize() {
    super.onInitialize();
    eventJournalReadResponseDecoder = message -> {
        final CacheEventJournalReadCodec.ResponseParameters params = CacheEventJournalReadCodec.decodeResponse(message);
        final ReadResultSetImpl resultSet = new ReadResultSetImpl<>(params.readCount, params.items, params.itemSeqs, params.nextSeq);
        resultSet.setSerializationService(getSerializationService());
        return resultSet;
    };
    eventJournalSubscribeResponseDecoder = message -> {
        final ResponseParameters resp = CacheEventJournalSubscribeCodec.decodeResponse(message);
        return new EventJournalInitialSubscriberState(resp.oldestSequence, resp.newestSequence);
    };
}

Example 8 with EventJournalInitialSubscriberState

use of com.hazelcast.internal.journal.EventJournalInitialSubscriberState in project hazelcast by hazelcast.

the class AbstractEventJournalBasicTest method nextSequenceProceedsWhenReadFromEventJournalWhileMinSizeIsZero.

@Test
public void nextSequenceProceedsWhenReadFromEventJournalWhileMinSizeIsZero() throws Exception {
    final EventJournalTestContext<String, Integer, EJ_TYPE> context = createContext();
    final int count = 1000;
    assertEventJournalSize(context.dataAdapter, 0);
    for (int i = 0; i < count; i++) {
        context.dataAdapter.put(randomPartitionKey(), i);
    }
    final EventJournalInitialSubscriberState state = subscribeToEventJournal(context.dataAdapter, partitionId);
    assertEquals(500, state.getOldestSequence());
    assertEquals(999, state.getNewestSequence());
    assertEventJournalSize(context.dataAdapter, 500);
    final int startSequence = 0;
    final ReadResultSet<EJ_TYPE> resultSet = readFromEventJournal(context.dataAdapter, startSequence, 1, 0, partitionId, TRUE_PREDICATE, IDENTITY_FUNCTION).toCompletableFuture().get();
    assertEquals(1, resultSet.size());
    assertEquals(1, resultSet.readCount());
    assertNotEquals(startSequence + resultSet.readCount(), resultSet.getNextSequenceToReadFrom());
    assertEquals(501, resultSet.getNextSequenceToReadFrom());
    final long lostCount = resultSet.getNextSequenceToReadFrom() - resultSet.readCount() - startSequence;
    assertEquals(500, lostCount);
}