mqtt.setTracer(new Tracer() {
@Override
public void onReceive(MQTTFrame frame) {
LOG.info("Client received:\n" + frame);
if (frame.messageType() == PUBLISH.TYPE) {
PUBLISH publish = new PUBLISH();
try {
publish.decode(frame);
} catch (ProtocolException e) {
fail("Error decoding publish " + e.getMessage());
}
publishList.add(publish);
}
}
@Override
public void onSend(MQTTFrame frame) {
LOG.info("Client sent:\n" + frame);
}
});
final BlockingConnection connection = mqtt.blockingConnection();
connection.connect();
// create overlapping subscriptions with different QoSs
QoS[] qoss = { QoS.AT_MOST_ONCE, QoS.AT_LEAST_ONCE, QoS.EXACTLY_ONCE };
final String TOPIC = "TopicA/";
// publish retained message
connection.publish(TOPIC, TOPIC.getBytes(), QoS.EXACTLY_ONCE, true);
String[] subs = { TOPIC, "TopicA/#", "TopicA/+" };
for (int i = 0; i < qoss.length; i++) {
connection.subscribe(new Topic[] { new Topic(subs[i], qoss[i]) });
}
// publish non-retained message
connection.publish(TOPIC, TOPIC.getBytes(), QoS.EXACTLY_ONCE, false);
int received = 0;
Message msg = connection.receive(5000, TimeUnit.MILLISECONDS);
do {
assertNotNull(msg);
assertEquals(TOPIC, new String(msg.getPayload()));
msg.ack();
int waitCount = 0;
while (publishList.size() <= received && waitCount < 10) {
Thread.sleep(1000);
waitCount++;
}
msg = connection.receive(5000, TimeUnit.MILLISECONDS);
} while (msg != null && received++ < subs.length * 2);
assertEquals("Unexpected number of messages", subs.length * 2, received + 1);
// make sure we received distinct ids for QoS != AT_MOST_ONCE, and 0 for
// AT_MOST_ONCE
for (int i = 0; i < publishList.size(); i++) {
for (int j = i + 1; j < publishList.size(); j++) {
final PUBLISH publish1 = publishList.get(i);
final PUBLISH publish2 = publishList.get(j);
boolean qos0 = false;
if (publish1.qos() == QoS.AT_MOST_ONCE) {
qos0 = true;
assertEquals(0, publish1.messageId());
}
if (publish2.qos() == QoS.AT_MOST_ONCE) {
qos0 = true;
assertEquals(0, publish2.messageId());
}
if (!qos0) {
assertNotEquals(publish1.messageId(), publish2.messageId());
}
}
}
connection.unsubscribe(subs);