Examples with TopicMetadataListener org.apache.flink.connector.pulsar.sink.writer.topic.TopicMetadataListener used on opensource projects

Example 1 with TopicMetadataListener

use of org.apache.flink.connector.pulsar.sink.writer.topic.TopicMetadataListener in project flink by apache.

the class PulsarSinkBuilder method setTopics.

/**
 * Set a pulsar topic list for flink sink. Some topic may not exist currently, consuming this
 * non-existed topic wouldn't throw any exception.
 *
 * @param topics The topic list you would like to consume message.
 * @return this PulsarSinkBuilder.
 */
public PulsarSinkBuilder<IN> setTopics(List<String> topics) {
    checkState(metadataListener == null, "setTopics couldn't be set twice.");
    // Making sure the topic should be distinct.
    List<String> topicSet = distinctTopics(topics);
    this.metadataListener = new TopicMetadataListener(topicSet);
    return this;
}

Example 2 with TopicMetadataListener

use of org.apache.flink.connector.pulsar.sink.writer.topic.TopicMetadataListener in project flink by apache.

the class PulsarSinkBuilder method build.

/**
 * Build the {@link PulsarSink}.
 *
 * @return a PulsarSink with the settings made for this builder.
 */
public PulsarSink<IN> build() {
    // Change delivery guarantee.
    DeliveryGuarantee deliveryGuarantee = configBuilder.get(PULSAR_WRITE_DELIVERY_GUARANTEE);
    if (deliveryGuarantee == DeliveryGuarantee.NONE) {
        LOG.warn("You haven't set delivery guarantee or set it to NONE, this would cause data loss. Make sure you have known this shortcoming.");
    } else if (deliveryGuarantee == DeliveryGuarantee.EXACTLY_ONCE) {
        LOG.info("Exactly once require flink checkpoint and your pulsar cluster should support the transaction.");
        configBuilder.override(PULSAR_ENABLE_TRANSACTION, true);
        configBuilder.override(PULSAR_SEND_TIMEOUT_MS, 0L);
        if (!configBuilder.contains(PULSAR_WRITE_TRANSACTION_TIMEOUT)) {
            LOG.warn("The default pulsar transaction timeout is 3 hours, make sure it was greater than your checkpoint interval.");
        } else {
            Long timeout = configBuilder.get(PULSAR_WRITE_TRANSACTION_TIMEOUT);
            LOG.warn("The configured transaction timeout is {} mille seconds, make sure it was greater than your checkpoint interval.", timeout);
        }
    }
    if (!configBuilder.contains(PULSAR_PRODUCER_NAME)) {
        LOG.warn("We recommend set a readable producer name through setProducerName(String) in production mode.");
    }
    checkNotNull(serializationSchema, "serializationSchema must be set.");
    if (serializationSchema instanceof PulsarSchemaWrapper && !Boolean.TRUE.equals(configBuilder.get(PULSAR_WRITE_SCHEMA_EVOLUTION))) {
        LOG.info("It seems like you want to send message in Pulsar Schema." + " You can enableSchemaEvolution for using this feature." + " We would use Schema.BYTES as the default schema if you don't enable this option.");
    }
    // Topic metadata listener validation.
    if (metadataListener == null) {
        if (topicRouter == null) {
            throw new NullPointerException("No topic names or custom topic router are provided.");
        } else {
            LOG.warn("No topic set has been provided, make sure your custom topic router support empty topic set.");
            this.metadataListener = new TopicMetadataListener();
        }
    }
    // Topic routing mode validate.
    if (topicRoutingMode == null) {
        LOG.info("No topic routing mode has been chosen. We use round-robin mode as default.");
        this.topicRoutingMode = TopicRoutingMode.ROUND_ROBIN;
    }
    if (messageDelayer == null) {
        this.messageDelayer = MessageDelayer.never();
    }
    // This is an unmodifiable configuration for Pulsar.
    // We don't use Pulsar's built-in configure classes for compatible requirement.
    SinkConfiguration sinkConfiguration = configBuilder.build(SINK_CONFIG_VALIDATOR, SinkConfiguration::new);
    return new PulsarSink<>(sinkConfiguration, serializationSchema, metadataListener, topicRoutingMode, topicRouter, messageDelayer);
}

Example 3 with TopicMetadataListener

use of org.apache.flink.connector.pulsar.sink.writer.topic.TopicMetadataListener in project flink by apache.

the class PulsarWriterTest method writeMessageWithoutGuarantee.

@ParameterizedTest
@EnumSource(value = DeliveryGuarantee.class, names = { "AT_LEAST_ONCE", "NONE" })
void writeMessageWithoutGuarantee(DeliveryGuarantee guarantee) throws Exception {
    String topic = randomAlphabetic(10);
    operator().createTopic(topic, 8);
    SinkConfiguration configuration = sinkConfiguration(guarantee);
    PulsarSerializationSchema<String> schema = pulsarSchema(STRING);
    TopicMetadataListener listener = new TopicMetadataListener(singletonList(topic));
    RoundRobinTopicRouter<String> router = new RoundRobinTopicRouter<>(configuration);
    FixedMessageDelayer<String> delayer = MessageDelayer.never();
    MockInitContext initContext = new MockInitContext();
    PulsarWriter<String> writer = new PulsarWriter<>(configuration, schema, listener, router, delayer, initContext);
    writer.flush(false);
    writer.prepareCommit();
    writer.flush(false);
    writer.prepareCommit();
    String message = randomAlphabetic(10);
    writer.write(message, CONTEXT);
    writer.flush(false);
    Collection<PulsarCommittable> committables = writer.prepareCommit();
    if (guarantee != EXACTLY_ONCE) {
        assertThat(committables).isEmpty();
    } else {
        assertThat(committables).hasSize(1);
        PulsarCommittable committable = committables.stream().findFirst().orElseThrow(IllegalArgumentException::new);
        TransactionCoordinatorClient coordinatorClient = operator().coordinatorClient();
        coordinatorClient.commit(committable.getTxnID());
    }
    String consumedMessage = operator().receiveMessage(topic, STRING).getValue();
    assertEquals(consumedMessage, message);
}