public void deadLetter(Long msgId) {
try {
channel.basicReject(msgId, false);
} catch (Exception e) {
logger.error("could not fail with dead-lettering (when configured) for msgId: " + msgId, e);
reporter.reportError(e);
}
}
public void failWithRedelivery(Long msgId) {
try {
channel.basicReject(msgId, true);
} catch (Exception e) {
logger.error("could not fail with redelivery for msgId: " + msgId, e);
reporter.reportError(e);
}
}
public void ack(Long msgId) {
try {
channel.basicAck(msgId, false);
} catch (Exception e) {
logger.error("could not ack for msgId: " + msgId, e);
reporter.reportError(e);
}
}
public Message nextMessage() {
reinitIfNecessary();
if (consumerTag == null || consumer == null) return Message.NONE;
try {
return Message.forDelivery(consumer.nextDelivery(MS_WAIT_FOR_MESSAGE));
} catch (ShutdownSignalException sse) {
reset();
logger.error("shutdown signal received while attempting to get next message", sse);
reporter.reportError(sse);
return Message.NONE;
} catch (InterruptedException ie) {
/* nothing to do. timed out waiting for message */
logger.debug("interruepted while waiting for message", ie);
return Message.NONE;
} catch (ConsumerCancelledException cce) {
/* if the queue on the broker was deleted or node in the cluster containing the queue failed */
reset();
logger.error("consumer got cancelled while attempting to get next message", cce);
reporter.reportError(cce);
return Message.NONE;
}
}
public void open() {
try {
connection = createConnection();
channel = connection.createChannel();
if (prefetchCount > 0) {
logger.info("setting basic.qos / prefetch count to " + prefetchCount + " for " + queueName);
channel.basicQos(prefetchCount);
}
// run any declaration prior to queue consumption
declarator.execute(channel);
consumer = new QueueingConsumer(channel);
consumerTag = channel.basicConsume(queueName, isAutoAcking(), consumer);
} catch (Exception e) {
reset();
logger.error("could not open listener on queue " + queueName);
reporter.reportError(e);
}
}
