/**
* {@inheritDoc} VirtualFirealarm device-type specific implementation to publish data to the
* device. This method calls the {@link #publishToQueue(String, MqttMessage)} method of the
* "MQTTTransportHandler" class.
*/
@Override
public void publishDeviceData(String... publishData) throws TransportHandlerException {
if (publishData.length != 4) {
String errorMsg =
"Incorrect number of arguments received to SEND-MQTT Message. "
+ "Need to be [owner, deviceId, resource{BULB/TEMP}, state{ON/OFF or null}]";
log.error(errorMsg);
throw new TransportHandlerException(errorMsg);
}
String deviceOwner = publishData[0];
String deviceId = publishData[1];
String resource = publishData[2];
String state = publishData[3];
MqttMessage pushMessage = new MqttMessage();
String publishTopic = "wso2/" + VirtualFireAlarmConstants.DEVICE_TYPE + "/" + deviceId;
try {
PublicKey devicePublicKey = VirtualFireAlarmServiceUtils.getDevicePublicKey(deviceId);
PrivateKey serverPrivateKey = SecurityManager.getServerPrivateKey();
String actualMessage = resource + ":" + state;
String encryptedMsg =
VirtualFireAlarmServiceUtils.prepareSecurePayLoad(
actualMessage, devicePublicKey, serverPrivateKey);
pushMessage.setPayload(encryptedMsg.getBytes(StandardCharsets.UTF_8));
pushMessage.setQos(DEFAULT_MQTT_QUALITY_OF_SERVICE);
pushMessage.setRetained(false);
publishToQueue(publishTopic, pushMessage);
} catch (VirtualFireAlarmException e) {
String errorMsg =
"Preparing Secure payload failed for device - ["
+ deviceId
+ "] of owner - "
+ "["
+ deviceOwner
+ "].";
log.error(errorMsg);
throw new TransportHandlerException(errorMsg, e);
}
}
/**
* {@inheritDoc} VirtualFirealarm device-type specific implementation to process incoming
* messages. This is the specific method signature of the overloaded "processIncomingMessage"
* method that gets called from the messageArrived() callback of the "MQTTTransportHandler".
*/
@Override
public void processIncomingMessage(MqttMessage mqttMessage, String... messageParams) {
if (messageParams.length != 0) {
// owner and the deviceId are extracted from the MQTT topic to which the message was received.
// <Topic> = [ServerName/Owner/DeviceType/DeviceId/"publisher"]
String topic = messageParams[0];
String[] topicParams = topic.split("/");
String deviceId = topicParams[2];
if (log.isDebugEnabled()) {
log.debug("Received MQTT message for: [DEVICE.ID-" + deviceId + "]");
}
String actualMessage;
try {
// the hash-code of the deviceId is used as the alias for device certificates during SCEP
// enrollment.
// hence, the same is used here to fetch the device-specific-certificate from the key store.
PublicKey clientPublicKey = VirtualFireAlarmServiceUtils.getDevicePublicKey(deviceId);
PrivateKey serverPrivateKey = SecurityManager.getServerPrivateKey();
// the MQTT-messages from VirtualFireAlarm devices are in the form {"Msg":<MESSAGE>,
// "Sig":<SIGNATURE>}
actualMessage =
VirtualFireAlarmServiceUtils.extractMessageFromPayload(
mqttMessage.toString(), serverPrivateKey, clientPublicKey);
if (log.isDebugEnabled()) {
log.debug("MQTT: Received Message [" + actualMessage + "] topic: [" + topic + "]");
}
if (actualMessage.contains("PUBLISHER")) {
float temperature = Float.parseFloat(actualMessage.split(":")[2]);
try {
PrivilegedCarbonContext.startTenantFlow();
PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
DeviceManagementProviderService deviceManagementProviderService =
(DeviceManagementProviderService)
ctx.getOSGiService(DeviceManagementProviderService.class, null);
if (deviceManagementProviderService != null) {
DeviceIdentifier identifier =
new DeviceIdentifier(deviceId, VirtualFireAlarmConstants.DEVICE_TYPE);
Device device = deviceManagementProviderService.getDevice(identifier);
if (device != null) {
String owner = device.getEnrolmentInfo().getOwner();
ctx.setTenantDomain(MultitenantUtils.getTenantDomain(owner), true);
ctx.setUsername(owner);
if (!VirtualFireAlarmServiceUtils.publishToDAS(deviceId, temperature)) {
log.error("MQTT Subscriber: Publishing data to DAS failed.");
}
}
}
} catch (DeviceManagementException e) {
log.error(
"Failed to retreive the device managment service for device type "
+ VirtualFireAlarmConstants.DEVICE_TYPE,
e);
} finally {
PrivilegedCarbonContext.endTenantFlow();
}
if (log.isDebugEnabled()) {
log.debug("MQTT Subscriber: Published data to DAS successfully.");
}
} else if (actualMessage.contains("TEMPERATURE")) {
String temperatureValue = actualMessage.split(":")[1];
}
} catch (VirtualFireAlarmException e) {
String errorMsg =
"CertificateManagementService failure oo Signature-Verification/Decryption was unsuccessful.";
log.error(errorMsg, e);
}
} else {
String errorMsg =
"MQTT message ["
+ mqttMessage.toString()
+ "] was received without the topic information.";
log.warn(errorMsg);
}
}