public void testSingleNack() throws Exception {
String q = channel.queueDeclare("", false, true, false, null).getQueue();
byte[] m1 = "1".getBytes();
byte[] m2 = "2".getBytes();
basicPublishVolatile(m1, q);
basicPublishVolatile(m2, q);
long tag1 = checkDelivery(channel.basicGet(q, false), m1, false);
long tag2 = checkDelivery(channel.basicGet(q, false), m2, false);
QueueingConsumer c = new QueueingConsumer(secondaryChannel);
String consumerTag = secondaryChannel.basicConsume(q, false, c);
// requeue
channel.basicNack(tag2, false, true);
long tag3 = checkDelivery(c.nextDelivery(), m2, true);
secondaryChannel.basicCancel(consumerTag);
// no requeue
secondaryChannel.basicNack(tag3, false, false);
assertNull(channel.basicGet(q, false));
channel.basicAck(tag1, false);
channel.basicNack(tag3, false, true);
expectError(AMQP.PRECONDITION_FAILED);
}
private long checkDeliveries(QueueingConsumer c, byte[]... messages) throws InterruptedException {
Set<String> msgSet = new HashSet<String>();
for (byte[] message : messages) {
msgSet.add(new String(message));
}
long lastTag = -1;
for (int x = 0; x < messages.length; x++) {
QueueingConsumer.Delivery delivery = c.nextDelivery();
String m = new String(delivery.getBody());
assertTrue("Unexpected message", msgSet.remove(m));
checkDelivery(delivery, m.getBytes(), true);
lastTag = delivery.getEnvelope().getDeliveryTag();
}
assertTrue(msgSet.isEmpty());
return lastTag;
}