How to use

getType

method

in

org.axonframework.eventhandling.DomainEventMessage

/**
 * Construct a new event entry from a published domain event message to enable storing the event or sending it to a
 * remote location.
 * <p>
 * The given {@code serializer} will be used to serialize the payload and metadata in the given {@code
 * eventMessage}. The type of the serialized data will be the same as the given {@code contentType}.
 *
 * @param eventMessage The event message to convert to a serialized event entry
 * @param serializer   The serializer to convert the event
 * @param contentType  The data type of the payload and metadata after serialization
 */
public AbstractSnapshotEventEntry(DomainEventMessage<?> eventMessage, Serializer serializer, Class<T> contentType) {
  super(eventMessage, serializer, contentType);
  type = eventMessage.getType();
  aggregateIdentifier = eventMessage.getAggregateIdentifier();
  sequenceNumber = eventMessage.getSequenceNumber();
}

/**
 * Construct a new event entry from a published domain event message to enable storing the event or sending it to a
 * remote location.
 * <p>
 * The given {@code serializer} will be used to serialize the payload and metadata in the given {@code eventMessage}.
 * The type of the serialized data will be the same as the given {@code contentType}.
 *
 * @param eventMessage The event message to convert to a serialized event entry
 * @param serializer   The serializer to convert the event
 * @param contentType  The data type of the payload and metadata after serialization
 */
public AbstractDomainEventEntry(DomainEventMessage<?> eventMessage, Serializer serializer, Class<T> contentType) {
  super(eventMessage, serializer, contentType);
  type = eventMessage.getType();
  aggregateIdentifier = eventMessage.getAggregateIdentifier();
  sequenceNumber = eventMessage.getSequenceNumber();
}

/**
 * Initialize a DomainEventMessage originating from an aggregate.
 *
 * @param trackingToken Tracking token of the event
 * @param delegate      Delegate domain event containing other event data
 */
public GenericTrackedDomainEventMessage(TrackingToken trackingToken, DomainEventMessage<T> delegate) {
  this(trackingToken, delegate.getType(), delegate.getAggregateIdentifier(), delegate.getSequenceNumber(),
     delegate, delegate.getTimestamp());
}

@Override
public <T> Message<T> convertToOutboundMessage(EventMessage<T> event) {
  Map<String, Object> headers = new HashMap<>();
  event.getMetaData().forEach(headers::put);
  headers.put(MESSAGE_ID, event.getIdentifier());
  if (event instanceof DomainEventMessage) {
    headers.put(AGGREGATE_ID, ((DomainEventMessage) event).getAggregateIdentifier());
    headers.put(AGGREGATE_SEQ, ((DomainEventMessage) event).getSequenceNumber());
    headers.put(AGGREGATE_TYPE, ((DomainEventMessage) event).getType());
  }
  return new GenericMessage<>(event.getPayload(), new SettableTimestampMessageHeaders(headers, event.getTimestamp().toEpochMilli()));
}

/**
 * Generate defaults headers to recognise an event message.
 *
 * @param message          event message.
 * @param serializedObject payload.
 * @return headers
 */
public static Map<String, Object> defaultHeaders(EventMessage<?> message,
                         SerializedObject<?> serializedObject) {
  Assert.notNull(message, () -> "Event message cannot be null");
  Assert.notNull(serializedObject, () -> "Serialized Object cannot be null");
  Assert.notNull(serializedObject.getType(), () -> "SerializedObject Type cannot be null");
  HashMap<String, Object> headers = new HashMap<>();
  headers.put(MESSAGE_ID, message.getIdentifier());
  headers.put(MESSAGE_TYPE, serializedObject.getType().getName());
  headers.put(MESSAGE_REVISION, serializedObject.getType().getRevision());
  headers.put(MESSAGE_TIMESTAMP, message.getTimestamp());
  if (message instanceof DomainEventMessage) {
    headers.put(AGGREGATE_ID, ((DomainEventMessage<?>) message).getAggregateIdentifier());
    headers.put(AGGREGATE_SEQ, ((DomainEventMessage<?>) message).getSequenceNumber());
    headers.put(AGGREGATE_TYPE, ((DomainEventMessage<?>) message).getType());
  }
  return Collections.unmodifiableMap(headers);
}

preparedStatement.setString(2, snapshot.getAggregateIdentifier());
preparedStatement.setLong(3, snapshot.getSequenceNumber());
preparedStatement.setString(4, snapshot.getType());
writeTimestamp(preparedStatement, 5, snapshot.getTimestamp());
preparedStatement.setString(6, payload.getType().getName());

preparedStatement.setString(2, event.getAggregateIdentifier());
preparedStatement.setLong(3, event.getSequenceNumber());
preparedStatement.setString(4, event.getType());
writeTimestamp(preparedStatement, 5, event.getTimestamp());
preparedStatement.setString(6, payload.getType().getName());

/**
 * Construct a new event entry from a published domain event message to enable storing the event or sending it to a
 * remote location.
 * <p>
 * The given {@code serializer} will be used to serialize the payload and metadata in the given {@code eventMessage}.
 * The type of the serialized data will be the same as the given {@code contentType}.
 *
 * @param eventMessage The event message to convert to a serialized event entry
 * @param serializer   The serializer to convert the event
 * @param contentType  The data type of the payload and metadata after serialization
 */
public AbstractDomainEventEntry(DomainEventMessage<?> eventMessage, Serializer serializer, Class<T> contentType) {
  super(eventMessage, serializer, contentType);
  type = eventMessage.getType();
  aggregateIdentifier = eventMessage.getAggregateIdentifier();
  sequenceNumber = eventMessage.getSequenceNumber();
}

/**
 * Construct a new event entry from a published domain event message to enable storing the event or sending it to a
 * remote location.
 * <p>
 * The given {@code serializer} will be used to serialize the payload and metadata in the given {@code
 * eventMessage}. The type of the serialized data will be the same as the given {@code contentType}.
 *
 * @param eventMessage The event message to convert to a serialized event entry
 * @param serializer   The serializer to convert the event
 * @param contentType  The data type of the payload and metadata after serialization
 */
public AbstractSnapshotEventEntry(DomainEventMessage<?> eventMessage, Serializer serializer, Class<T> contentType) {
  super(eventMessage, serializer, contentType);
  type = eventMessage.getType();
  aggregateIdentifier = eventMessage.getAggregateIdentifier();
  sequenceNumber = eventMessage.getSequenceNumber();
}

/**
 * Initialize a DomainEventMessage originating from an aggregate.
 *
 * @param trackingToken Tracking token of the event
 * @param delegate      Delegate domain event containing other event data
 */
public GenericTrackedDomainEventMessage(TrackingToken trackingToken, DomainEventMessage<T> delegate) {
  this(trackingToken, delegate.getType(), delegate.getAggregateIdentifier(), delegate.getSequenceNumber(),
     delegate, delegate.getTimestamp());
}

/**
 * Generate defaults headers to recognise an event message.
 *
 * @param message          event message.
 * @param serializedObject payload.
 * @return headers
 */
public static Map<String, Object> defaultHeaders(EventMessage<?> message,
                         SerializedObject<?> serializedObject) {
  Assert.notNull(message, () -> "Event message cannot be null");
  Assert.notNull(serializedObject, () -> "Serialized Object cannot be null");
  Assert.notNull(serializedObject.getType(), () -> "SerializedObject Type cannot be null");
  HashMap<String, Object> headers = new HashMap<>();
  headers.put(MESSAGE_ID, message.getIdentifier());
  headers.put(MESSAGE_TYPE, serializedObject.getType().getName());
  headers.put(MESSAGE_REVISION, serializedObject.getType().getRevision());
  headers.put(MESSAGE_TIMESTAMP, message.getTimestamp());
  if (message instanceof DomainEventMessage) {
    headers.put(AGGREGATE_ID, ((DomainEventMessage<?>) message).getAggregateIdentifier());
    headers.put(AGGREGATE_SEQ, ((DomainEventMessage<?>) message).getSequenceNumber());
    headers.put(AGGREGATE_TYPE, ((DomainEventMessage<?>) message).getType());
  }
  return Collections.unmodifiableMap(headers);
}

/**
 * Constructor used to create a new event entry to store in Mongo.
 *
 * @param serializer Serializer to use for the event to store
 * @param events     The events contained in this commit
 */
public CommitEntry(List<? extends DomainEventMessage<?>> events, Serializer serializer) {
  DomainEventMessage firstEvent = events.get(0);
  DomainEventMessage lastEvent = events.get(events.size() - 1);
  firstSequenceNumber = firstEvent.getSequenceNumber();
  firstTimestamp = formatInstant(firstEvent.getTimestamp());
  lastTimestamp = formatInstant(lastEvent.getTimestamp());
  lastSequenceNumber = lastEvent.getSequenceNumber();
  aggregateIdentifier = lastEvent.getAggregateIdentifier();
  lastEventIdentifier = lastEvent.getIdentifier();
  aggregateType = lastEvent.getType();
  eventEntries = new EventEntry[events.size()];
  for (int i = 0, eventsLength = events.size(); i < eventsLength; i++) {
    DomainEventMessage event = events.get(i);
    eventEntries[i] = new EventEntry(event, serializer);
  }
}

preparedStatement.setString(2, event.getAggregateIdentifier());
preparedStatement.setLong(3, event.getSequenceNumber());
preparedStatement.setString(4, event.getType());
writeTimestamp(preparedStatement, 5, event.getTimestamp());
preparedStatement.setString(6, payload.getType().getName());

preparedStatement.setString(2, snapshot.getAggregateIdentifier());
preparedStatement.setLong(3, snapshot.getSequenceNumber());
preparedStatement.setString(4, snapshot.getType());
writeTimestamp(preparedStatement, 5, snapshot.getTimestamp());
preparedStatement.setString(6, payload.getType().getName());

/**
 * Constructor used to create a new event entry to store in Mongo.
 *
 * @param event      The actual DomainEvent to store
 * @param serializer Serializer to use for the event to store
 */
public EventEntry(DomainEventMessage<?> event, Serializer serializer) {
  aggregateIdentifier = event.getAggregateIdentifier();
  aggregateType = event.getType();
  sequenceNumber = event.getSequenceNumber();
  eventIdentifier = event.getIdentifier();
  Class<?> serializationTarget = String.class;
  if (serializer.canSerializeTo(DBObject.class)) {
    serializationTarget = DBObject.class;
  }
  SerializedObject<?> serializedPayloadObject = event.serializePayload(serializer, serializationTarget);
  SerializedObject<?> serializedMetaDataObject = event.serializeMetaData(serializer, serializationTarget);
  serializedPayload = serializedPayloadObject.getData();
  payloadType = serializedPayloadObject.getType().getName();
  payloadRevision = serializedPayloadObject.getType().getRevision();
  serializedMetaData = serializedMetaDataObject.getData();
  timestamp = formatInstant(event.getTimestamp());
}