/**
* Initialized a DispatchMessage for the given <code>commandMessage</code>, to be serialized using
* given <code>serializer</code>. <code>expectReply</code> indicates whether the sender will be
* expecting a reply.
*
* @param commandMessage The message to send to the remote segment
* @param serializer The serialize to serialize the message payload and metadata with
* @param expectReply whether or not the sender is waiting for a reply.
*/
public DispatchMessage(
CommandMessage<?> commandMessage, Serializer serializer, boolean expectReply) {
this.commandIdentifier = commandMessage.getIdentifier();
this.expectReply = expectReply;
SerializedObject<byte[]> payload = serializePayload(commandMessage, serializer, byte[].class);
SerializedObject<byte[]> metaData = serializeMetaData(commandMessage, serializer, byte[].class);
payloadType = payload.getType().getName();
payloadRevision = payload.getType().getRevision();
serializedPayload = payload.getData();
serializedMetaData = metaData.getData();
commandName = commandMessage.getCommandName();
}
private EventEntry(Serializer serializer, DomainEventMessage event) {
this.eventIdentifier = event.getIdentifier();
Class<?> serializationTarget = String.class;
if (serializer.canSerializeTo(DBObject.class)) {
serializationTarget = DBObject.class;
}
SerializedObject serializedPayloadObject =
serializePayload(event, serializer, serializationTarget);
SerializedObject serializedMetaDataObject =
serializeMetaData(event, serializer, serializationTarget);
this.serializedPayload = serializedPayloadObject.getData();
this.payloadType = serializedPayloadObject.getType().getName();
this.payloadRevision = serializedPayloadObject.getType().getRevision();
this.serializedMetaData = serializedMetaDataObject.getData();
this.sequenceNumber = event.getSequenceNumber();
this.timestamp = event.getTimestamp().toEpochMilli();
}
@Override
public Document doUpcast(
SerializedObject<Document> intermediateRepresentation, UpcastingContext context) {
// here, we convert the XML format of the old event to that of the new event
Document data = intermediateRepresentation.getData();
Element rootElement = data.getRootElement();
// change the name of the root element to reflect the changed class name
rootElement.setName(NewToDoItemWithDeadlineCreatedEvent.class.getName());
// and add an element for the new "deadline" field
rootElement
.addElement("deadline")
// we set the value of the field to the default value: one day after the event was created
.setText(context.getTimestamp().plusDays(1).toString());
// we return the modified Document
return data;
}