/**
* Publish / send a message to an MQTT server
*
* @param topicName the name of the topic to publish to
* @param qos the quality of service to delivery the message at (0,1,2)
* @param payload the set of bytes to send to the MQTT server
* @throws MqttException
*/
public void publish(String topicName, int qos, byte[] payload) throws MqttException {
// Connect to the MQTT server
// issue a non-blocking connect and then use the token to wait until the
// connect completes. An exception is thrown if connect fails.
log("Connecting to " + brokerUrl + " with client ID " + client.getClientId());
IMqttToken conToken = client.connect(conOpt, null, null);
conToken.waitForCompletion();
log("Connected");
String time = new Timestamp(System.currentTimeMillis()).toString();
log("Publishing at: " + time + " to topic \"" + topicName + "\" qos " + qos);
// Construct the message to send
MqttMessage message = new MqttMessage(payload);
message.setQos(qos);
// Send the message to the server, control is returned as soon
// as the MQTT client has accepted to deliver the message.
// Use the delivery token to wait until the message has been
// delivered
IMqttDeliveryToken pubToken = client.publish(topicName, message, null, null);
pubToken.waitForCompletion();
log("Published");
// Disconnect the client
// Issue the disconnect and then use a token to wait until
// the disconnect completes.
log("Disconnecting");
IMqttToken discToken = client.disconnect(null, null);
discToken.waitForCompletion();
log("Disconnected");
}
private boolean sendInfectionMessage(boolean entering) {
if (mqttClient != null && mqttClient.isConnected()) {
try {
JSONArray a = gameDatabase.findAllVirusDataAsJson();
JSONObject o = new JSONObject();
if (entering) o.put("entering", currentTopic);
o.put("sender", clientId);
o.put("viruses", a);
String payload = o.toString();
Log.d(LOG_TAG, "publishing to " + currentTopic + ": " + payload);
IMqttDeliveryToken token =
mqttClient.publish(currentTopic, new MqttMessage(payload.getBytes()));
token.setActionCallback(
new IMqttActionListener() {
@Override
public void onSuccess(IMqttToken asyncActionToken) {
sendEnterMessage = false;
}
@Override
public void onFailure(IMqttToken asyncActionToken, Throwable exception) {}
});
return true;
} catch (MqttException e) {
//
} catch (JSONException e) {
Log.e(LOG_TAG, "JSONException", e);
}
}
return false;
}
@Override
public void deliveryComplete(IMqttDeliveryToken topic) {
log.info(
"Published topic: '"
+ topic.getTopics()[0]
+ "' successfully to client: '"
+ topic.getClient().getClientId()
+ "'");
}
/** @see MqttCallback#deliveryComplete(IMqttDeliveryToken) */
public void deliveryComplete(IMqttDeliveryToken token) {
// Called when a message has been delivered to the
// server. The token passed in here is the same one
// that was passed to or returned from the original call to publish.
// This allows applications to perform asynchronous
// delivery without blocking until delivery completes.
//
// This sample demonstrates asynchronous deliver and
// uses the token.waitForCompletion() call in the main thread which
// blocks until the delivery has completed.
// Additionally the deliveryComplete method will be called if
// the callback is set on the client
//
// If the connection to the server breaks before delivery has completed
// delivery of a message will complete after the client has re-connected.
// The getPendinTokens method will provide tokens for any messages
// that are still to be delivered.
try {
log("Delivery complete callback: Publish Completed " + token.getMessage());
} catch (Exception ex) {
log("Exception in delivery complete callback" + ex);
}
}
public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {
log.info("message delivered .. : " + iMqttDeliveryToken.toString());
}
@Override
public void deliveryComplete(IMqttDeliveryToken token) {
LOG.log(Level.INFO, "Delivery complete of message id:{0}", token.getMessageId());
}
/**
* A completed deliver does not guarantee that the message is received by the service because
* devices send messages with Quality of Service (QoS) 0. <br>
* The message count represents the number of messages that were sent by the device without an
* error on from the perspective of the device.
*
* @param token MQTT delivery token
*/
public void deliveryComplete(IMqttDeliveryToken token) {
final String METHOD = "deliveryComplete";
LoggerUtility.fine(CLASS_NAME, METHOD, "token " + token.getMessageId());
messageCount++;
}