Apache Camel - Create mock endpoint to listen to messages sent from within a processor - apache-camel

Question

I have a route as follows:
from(fromEndpoint).routeId("ticketRoute")
.log("Received Tickets : ${body}")
.doTry()
.process(exchange -> {
List<TradeTicketDto> ticketDtos = (List<TradeTicketDto>) exchange.getIn().getBody();
ticketDtos.stream()
.forEach(t -> solaceMessagePublisher.sendAsText("BOOKINGSERVICE.TICKET.UPDATED", t));
ticketToTradeConverter.convert(ticketDtos)
.forEach(t -> solaceMessagePublisher.sendAsText("BOOKINGSERVICE.TRADE.UPDATED", t));
}).doCatch(java.lang.RuntimeException.class)
.log(exceptionMessage().toString() + " --> ${body}");
solaceMessagePublisher is a utility class in application which performs some action on passed object (second argument) and finally converts it to json string and sends to a jms topic (first argument).
SolaceMessagePublisher.java
public void sendAsText(final String destinationKey, Object payload) {
LOGGER.debug("Sending object as text to %s",destinationKey);
String destinationValue = null;
if (StringUtils.isNotEmpty(destinationKey)) {
destinationValue = properties.getProperty(destinationKey);
}
LOGGER.debug("Identified Destination Value = %s from key %s", destinationValue,destinationKey);
if (StringUtils.isEmpty(destinationValue)) {
throw new BaseServiceException("Invalid destination for message");
}
sendAsTextToDestination(destinationValue, payload);
}
public void sendAsTextToDestination(final String destinationValue, Object payload) {
if (payload == null) {
LOGGER.debug(" %s %s",EMPTY_PAYLOAD_ERROR_MESSAGE, destinationValue);
return;
}
final String message = messageCreator.createMessageEnvelopAsJSON(payload, ContextProvider.getUserInContext());
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Created message = " + message);
}
jmsTemplate.send(destinationValue, new MessageCreator() {
#Override
public Message createMessage(Session session) throws JMSException {
LOGGER.debug("Creating JMS Text Message");
return session.createTextMessage(message);
}
});
}
I am having a problem in creating a mock endpoint to listen to messages sent to this topic. Question is how to listen to the messages sent to a topic which is out of camel context?
I have tried in my Test using mock:jms:endpoint. It doesn't work.
My Test is as below
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(classes = { SiteMain.class })
public class TicketRouteCamelTest extends CamelSpringTestSupport{
#Autowired
protected BaseMessageEnvelopCreator messageCreator;
private static final String MOCK_TICKET_UPDATED_QUEUE = "direct:mockTicketUpdated";
#Before
public void configureMockEndpoints() throws Exception {
//mock input
final AdviceWithRouteBuilder mockRouteAdvice = new AdviceWithRouteBuilder() {
#Override
public void configure() throws Exception {
replaceFromWith(MOCK_TICKET_UPDATED_QUEUE);
}
};
context().getRouteDefinition("ticketRoute").adviceWith(context(), mockRouteAdvice);
}
#Test
public void testTicketRouteWithListOfTickets() throws Exception {
//create test data
TradeTicketDto tradeTicketDto = TradeTestDataHelper.getTradeTicketDto();
//create an exchange and set its body with test data
List<TradeTicketDto> list = new ArrayList<>();
list.add(tradeTicketDto);
list.add(tradeTicketDto);
Exchange requestExchange = ExchangeBuilder.anExchange(context()).build();
requestExchange.getIn().setBody(list);
//create assert on the mock endpoints
MockEndpoint mockTicketUpdatedEndpoint = getMockEndpoint("mock:DEV/bookingservice/ticket/updated");
mockTicketUpdatedEndpoint.expectedBodiesReceived(
messageCreator.createMessageEnvelopAsJSON(list.get(0), ContextProvider.getUserInContext()),
messageCreator.createMessageEnvelopAsJSON(list.get(1), ContextProvider.getUserInContext()) );
MockEndpoint mockTradeUpdatedEndpoint = getMockEndpoint("mock:DEV/bookingservice/trade/updated");
mockTradeUpdatedEndpoint.expectedBodiesReceived(
messageCreator.createMessageEnvelopAsJSON(list.get(0).getTicketInstruments().get(0), ContextProvider.getUserInContext()),
messageCreator.createMessageEnvelopAsJSON(list.get(0).getTicketInstruments().get(1), ContextProvider.getUserInContext()),
messageCreator.createMessageEnvelopAsJSON(list.get(1).getTicketInstruments().get(0), ContextProvider.getUserInContext()),
messageCreator.createMessageEnvelopAsJSON(list.get(1).getTicketInstruments().get(1), ContextProvider.getUserInContext()));
//send test exchange to request mock endpoint
template.send(MOCK_TICKET_UPDATED_QUEUE, requestExchange);
//test the asserts
assertMockEndpointsSatisfied();
}
}
On running test actual bodies received on mockendpont is 0

Answer 1

Mock is NOT a queue for consumers/producers to exchange data. Its a sink for testing purpose where you can setup expectations on the mock.
If you want to simulate a JMS via some kind of other means, then take a look at the stub component: http://camel.apache.org/stub
Its also listed in the bottom of the testing docs at: http://camel.apache.org/testing