/**
* Publish the Device management response to IBm IoT Foundation
*
* <p>This method is used by the library to respond to each of the Device Management commands from
* IBM IoT Foundation
*
* @param topic Topic where the response to be published
* @param payload the Payload
* @param qos The Quality Of Service
* @throws MqttException
*/
public void publish(DeviceTopic topic, JsonObject payload, int qos) throws MqttException {
final String METHOD = "publish3";
JsonObject jsonPubMsg = new JsonObject();
jsonPubMsg.addProperty("topic", topic.getName());
jsonPubMsg.add("qos", new JsonPrimitive(qos));
jsonPubMsg.add("payload", payload);
publishQueue.add(jsonPubMsg);
LoggerUtility.log(
Level.FINE,
CLASS_NAME,
METHOD,
": Queued Topic(" + topic + ") qos=" + qos + " payload (" + payload.toString() + ")");
}
private void publish(JsonObject jsonPubMsg) throws MqttException, UnsupportedEncodingException {
final String METHOD = "publish1";
String topic = jsonPubMsg.get("topic").getAsString();
int qos = jsonPubMsg.get("qos").getAsInt();
JsonObject payload = jsonPubMsg.getAsJsonObject("payload");
LoggerUtility.log(
Level.FINE,
CLASS_NAME,
METHOD,
": Topic(" + topic + ") qos=" + qos + " payload (" + payload.toString() + ")");
MqttMessage message = new MqttMessage();
message.setPayload(payload.toString().getBytes("UTF-8"));
message.setQos(qos);
publish(DeviceTopic.get(topic), message);
}
protected IMqttDeliveryToken publish(DeviceTopic topic, MqttMessage message)
throws MqttException {
final String METHOD = "publish";
IMqttDeliveryToken token = null;
LoggerUtility.fine(CLASS_NAME, METHOD, "Topic(" + topic + ")");
while (true) {
if (isConnected()) {
try {
if (this.mqttAsyncClient != null) {
token = mqttAsyncClient.publish(topic.getName(), message);
} else if (mqttClient != null) {
mqttClient.publish(topic.getName(), message);
}
} catch (MqttException ex) {
String payload = null;
try {
payload = new String(message.getPayload(), "UTF-8");
} catch (UnsupportedEncodingException e1) {
}
if (this.mqttAsyncClient.isConnected() == false) {
LoggerUtility.log(
Level.WARNING,
CLASS_NAME,
METHOD,
" Connection Lost retrying to publish MSG :"
+ payload
+ " on topic "
+ topic
+ " every 5 seconds");
// wait for 5 seconds and retry
try {
Thread.sleep(5 * 1000);
continue;
} catch (InterruptedException e) {
}
} else {
throw ex;
}
}
if (isConnected() == false) {
LoggerUtility.log(
Level.WARNING,
CLASS_NAME,
METHOD,
"MQTT got disconnected " + "after publish to Topic(" + topic + ")");
}
return token;
} else {
LoggerUtility.warn(
CLASS_NAME,
METHOD,
": Will not publish to topic(" + topic + ") because MQTT client is not connected.");
try {
Thread.sleep(5 * 1000);
continue;
} catch (InterruptedException e) {
}
}
}
}