@Override
public boolean offer(T event) throws FalconException {
Session session;
try {
session = getSession();
TextMessage msg = session.createTextMessage(event.toString());
msg.setLongProperty(
ScheduledMessage.AMQ_SCHEDULED_DELAY, event.getDelay(TimeUnit.MILLISECONDS));
msg.setStringProperty("TYPE", event.getType().name());
producer.send(msg);
LOG.debug(
"Enqueued Message: {} with delay {} milli sec",
event.toString(),
event.getDelay(TimeUnit.MILLISECONDS));
return true;
} catch (Exception e) {
LOG.error("Unable to offer event: {} to ActiveMQ", event, e);
throw new FalconException("Unable to offer event:" + event + " to ActiveMQ", e);
}
}
@Override
public T take() throws FalconException {
try {
TextMessage textMessage = (TextMessage) consumer.receive();
T event =
new RerunEventFactory<T>()
.getRerunEvent(textMessage.getStringProperty("TYPE"), textMessage.getText());
LOG.debug("Dequeued Message: {}", event.toString());
return event;
} catch (Exception e) {
LOG.error("Error getting the message from ActiveMQ", e);
throw new FalconException("Error getting the message from ActiveMQ: ", e);
}
}
public void invoke(T message) throws EndpointException {
MessageProducer messageProducer = null;
Message jmsMessage = null;
try {
messageProducer = session.createProducer(destination);
if (message instanceof FlowEvent) {
jmsMessage = this.convertToMessage(((FlowEvent) message).getPayload());
// carry the event identifier if available
this.managedEventIdentifierService.setEventIdentifier(
((FlowEvent<String, ?>) message).getIdentifier(), jmsMessage);
} else {
jmsMessage = this.convertToMessage(message);
}
// pass original message to getMessageProperties to allow overridding classes to implement
// custom processing
// and set whatever comes back as properties on the message
setMessageProperties(jmsMessage, getMessageProperties(message));
// allow programmatic overrride of properties
if (customMessagePropertyProvider != null) {
setMessageProperties(jmsMessage, customMessagePropertyProvider.getProperties(message));
}
// publish message
messageProducer.send(jmsMessage);
if (logger.isDebugEnabled()) {
logger.debug("Published [" + message.toString() + "]");
}
} catch (JMSException e) {
throw new EndpointException(e);
} finally {
if (messageProducer != null) {
try {
messageProducer.close();
messageProducer = null;
} catch (JMSException e) {
logger.error("Failed to close session", e);
}
}
}
}