Examples with EventMetadata io.zeebe.client.event.EventMetadata used on opensource projects

Example 1 with EventMetadata

use of io.zeebe.client.event.EventMetadata in project zeebe by zeebe-io.

the class EventLogger method main.

public static void main(String[] args) {
    final String brokerContactPoint = "127.0.0.1:51015";
    final Properties clientProperties = new Properties();
    clientProperties.put(ClientProperties.BROKER_CONTACTPOINT, brokerContactPoint);
    final ZeebeClient zeebeClient = new ZeebeClientImpl(clientProperties);
    System.out.println(String.format("> Connecting to %s", brokerContactPoint));
    final String topicName = "default-topic";
    System.out.println(String.format("> Open event subscription from topic '%s'", topicName));
    final TopicSubscription subscription = zeebeClient.topics().newSubscription(topicName).startAtHeadOfTopic().forcedStart().name("logger").handler(event -> {
        final EventMetadata metadata = event.getMetadata();
        System.out.println(String.format(">>> [topic: %d, position: %d, key: %d, type: %s]\n%s\n===", metadata.getPartitionId(), metadata.getPosition(), metadata.getKey(), metadata.getType(), event.getJson()));
    }).open();
    System.out.println("> Opened.");
    // wait for events
    try (Scanner scanner = new Scanner(System.in)) {
        while (scanner.hasNextLine()) {
            final String nextLine = scanner.nextLine();
            if (nextLine.contains("exit")) {
                System.out.println("> Closing...");
                subscription.close();
                zeebeClient.close();
                System.out.println("> Closed.");
                System.exit(0);
            }
        }
    }
}

Example 2 with EventMetadata

use of io.zeebe.client.event.EventMetadata in project zeebe by zeebe-io.

the class RecordingEventHandler method assertTaskEvent.

public void assertTaskEvent(int index, long taskKey, String eventType) throws IOException {
    final List<GeneralEvent> taskEvents = events.stream().filter(e -> e.getMetadata().getType() == TopicEventType.TASK).collect(Collectors.toList());
    final GeneralEvent taskEvent = taskEvents.get(index);
    final EventMetadata eventMetadata = taskEvent.getMetadata();
    assertThat(eventMetadata.getType()).isEqualTo(TopicEventType.TASK);
    assertThat(eventMetadata.getKey()).isEqualTo(taskKey);
    final JsonNode event = objectMapper.readTree(taskEvent.getJson());
    assertThat(event.get("state").asText()).isEqualTo(eventType);
}

Example 3 with EventMetadata

use of io.zeebe.client.event.EventMetadata in project zeebe by zeebe-io.

the class CommandRequestHandler method serialize.

protected void serialize(EventImpl event) {
    int offset = 0;
    headerEncoder.wrap(serializedCommand, offset).blockLength(encoder.sbeBlockLength()).schemaId(encoder.sbeSchemaId()).templateId(encoder.sbeTemplateId()).version(encoder.sbeSchemaVersion());
    offset += headerEncoder.encodedLength();
    encoder.wrap(serializedCommand, offset);
    final EventMetadata metadata = event.getMetadata();
    if (metadata.getKey() < 0) {
        encoder.key(ExecuteCommandRequestEncoder.keyNullValue());
    } else {
        encoder.key(metadata.getKey());
    }
    encoder.partitionId(metadata.getPartitionId()).eventType(EventTypeMapping.mapEventType(metadata.getType())).position(metadata.getPosition());
    offset = encoder.limit();
    final int commandHeaderOffset = offset;
    final int serializedCommandOffset = commandHeaderOffset + commandHeaderLength();
    final ExpandableDirectBufferOutputStream out = new ExpandableDirectBufferOutputStream(serializedCommand, serializedCommandOffset);
    try {
        objectMapper.writeValue(out, event);
    } catch (final Throwable e) {
        throw new RuntimeException("Failed to serialize command", e);
    }
    // can only write the header after we have written the command, as we don't know the length beforehand
    final short commandLength = (short) out.position();
    serializedCommand.putShort(commandHeaderOffset, commandLength, java.nio.ByteOrder.LITTLE_ENDIAN);
    serializedCommandLength = serializedCommandOffset + out.position();
}

Example 4 with EventMetadata

use of io.zeebe.client.event.EventMetadata in project zeebe by zeebe-io.

the class SubscriptionManager method onEvent.

@Override
public boolean onEvent(SubscriptionType type, long subscriberKey, GeneralEventImpl event) {
    final EventMetadata eventMetadata = event.getMetadata();
    final EventSubscribers subscribers;
    if (type == SubscriptionType.TASK_SUBSCRIPTION) {
        subscribers = taskSubscribers;
    } else if (type == SubscriptionType.TOPIC_SUBSCRIPTION) {
        subscribers = topicSubscribers;
    } else {
        subscribers = null;
    }
    Subscriber subscriber = null;
    if (subscribers != null) {
        final int partitionId = eventMetadata.getPartitionId();
        subscriber = subscribers.getSubscriber(partitionId, subscriberKey);
        if (subscriber == null) {
            if (subscribers.isAnySubscriberOpeningOn(partitionId)) {
                // In this case, we postpone the event.
                return false;
            }
        }
    }
    if (subscriber != null && subscriber.isOpen()) {
        event.setTopicName(subscriber.getTopicName());
        return subscriber.addEvent(event);
    } else {
        LOGGER.debug("Ignoring event event {} for subscription [type={}, partition={}, key={}]", event, type, event.getMetadata().getPartitionId(), subscriberKey);
        // ignoring the event is success; don't want to retry it later
        return true;
    }
}