Examples with UpdateMessage org.apache.samza.operators.UpdateMessage used on opensource projects

Example 1 with UpdateMessage

use of org.apache.samza.operators.UpdateMessage in project samza by apache.

the class SendToTableWithUpdateOperatorImpl method handleMessageAsync.

@Override
protected CompletionStage<Collection<KV<K, UpdateMessage<U, V>>>> handleMessageAsync(KV<K, UpdateMessage<U, V>> message, MessageCollector collector, TaskCoordinator coordinator) {
    final UpdateOptions options = spec.getUpdateOptions();
    final CompletableFuture<Void> updateFuture = table.updateAsync(message.getKey(), message.getValue().getUpdate());
    return updateFuture.handle((result, ex) -> {
        if (ex == null) {
            // success, no need to Put a default value
            return false;
        } else if (ex.getCause() instanceof RecordNotFoundException && message.getValue().hasDefault()) {
            // to PUT a default record for the key and then apply the update.
            if (options == UpdateOptions.UPDATE_WITH_DEFAULTS) {
                return true;
            } else {
                throw new SamzaException("Put default failed for update as the Update options was set to " + options + ". Please use UpdateOptions.UPDATE_WITH_DEFAULTS instead.");
            }
        } else {
            throw new SamzaException("Update failed with exception: ", ex);
        }
    }).thenCompose(shouldPutDefault -> {
        if (shouldPutDefault) {
            final CompletableFuture<Void> putFuture = table.putAsync(message.getKey(), message.getValue().getDefault());
            return putFuture.exceptionally(ex -> {
                LOG.warn("PUT default failed due to an exception. Ignoring the exception and proceeding with update. " + "The exception encountered is: ", ex);
                return null;
            }).thenCompose(res -> table.updateAsync(message.getKey(), message.getValue().getUpdate())).exceptionally(ex -> {
                throw new SamzaException("Update after Put default failed with exception: ", ex);
            });
        } else {
            return CompletableFuture.completedFuture(null);
        }
    }).thenApply(result -> Collections.singleton(message));
}

Example 2 with UpdateMessage

use of org.apache.samza.operators.UpdateMessage in project samza by apache.

the class TestRemoteTableEndToEnd method testSendToUpdatesWithoutUpdateOptions.

// Test will fail as we use sendTo with KV<K, UpdateMessage> stream without UpdateOptions
@Test(expected = SamzaException.class)
public void testSendToUpdatesWithoutUpdateOptions() throws Exception {
    // max member id for page views is 10
    final String profiles = Base64Serializer.serialize(generateProfiles(10));
    final RateLimiter readRateLimiter = mock(RateLimiter.class, withSettings().serializable());
    final TableRateLimiter.CreditFunction creditFunction = (k, v, args) -> 1;
    final StreamApplication app = appDesc -> {
        final RemoteTableDescriptor joinTableDesc = new RemoteTableDescriptor<Integer, TestTableData.Profile, Void>("profile-table-1").withReadFunction(InMemoryProfileReadFunction.getInMemoryReadFunction(profiles)).withRateLimiter(readRateLimiter, creditFunction, null);
        final RemoteTableDescriptor outputTableDesc = new RemoteTableDescriptor<Integer, EnrichedPageView, EnrichedPageView>("enriched-page-view-table-1").withReadFunction(new NoOpTableReadFunction<>()).withReadRateLimiterDisabled().withWriteFunction(new InMemoryEnrichedPageViewWriteFunction2("testUpdateWithoutUpdateOptions", false)).withWriteRateLimit(1000);
        final Table<KV<Integer, Profile>> outputTable = appDesc.getTable(outputTableDesc);
        final Table<KV<Integer, Profile>> joinTable = appDesc.getTable(joinTableDesc);
        final DelegatingSystemDescriptor ksd = new DelegatingSystemDescriptor("test");
        final GenericInputDescriptor<PageView> isd = ksd.getInputDescriptor("PageView", new NoOpSerde<>());
        appDesc.getInputStream(isd).map(pv -> new KV<>(pv.getMemberId(), pv)).join(joinTable, new PageViewToProfileJoinFunction()).map(m -> new KV(m.getMemberId(), UpdateMessage.of(m, m))).sendTo(outputTable);
    };
    int numPageViews = 40;
    InMemorySystemDescriptor isd = new InMemorySystemDescriptor("test");
    InMemoryInputDescriptor<PageView> inputDescriptor = isd.getInputDescriptor("PageView", new NoOpSerde<>());
    TestRunner.of(app).addInputStream(inputDescriptor, TestTableData.generatePartitionedPageViews(numPageViews, 4)).run(Duration.ofSeconds(10));
}