    /**********************************************************************************************
     * This example code is provided for illustrative purposes only and provided 'AS IS' without
     * warranty of any kind.
     *
     * Copyright ©2014 Chrysler Group LLC.  All Rights Reserved.  All information contained herein is,
     * and remains the property of Chrysler Group LLC and its suppliers, if any.  The intellectual and
     * technical concepts contained herein are proprietary to Chrysler Group LLC and its suppliers
     * and may be covered by U.S. and Foreign Patents, patents in process, and are protected by trade
     * secret or copyright law. Dissemination of this information or reproduction of this material is
     * strictly forbidden unless prior written permission is obtained from Chrysler Group LLC.
     *
     * Chrysler, Jeep, Dodge, Ram, SRT, Mopar and the Pentastar logo are registered trademarks of
     * Chrysler Group LLC. FIAT is a registered trademark of Fiat group Marketing & Corporate
     * Communication S.p.A. used under license by Chrysler Group LLC.
     *********************************************************************************************/
    package com.fca.uconnect.global;

    import java.util.List;

    import com.amazonaws.services.iot.client.AWSIotException;
    import com.amazonaws.services.iot.client.AWSIotMessage;
    import com.amazonaws.services.iot.client.AWSIotMqttClient;
    import com.amazonaws.services.iot.client.AWSIotQos;
    import com.amazonaws.services.iot.client.AWSIotTopic;
    import com.fca.uconnect.global.GlobalUconnectControl.UconnectAny;
    import com.fca.uconnect.global.GlobalUconnectControl.UconnectMessage;
    import com.fca.uconnect.global.GlobalUconnectExtVehicleMessaging.VehicleMessageAck;
    import com.fca.uconnect.global.GlobalUconnectExtVehicleMessaging.VehicleMessageAck.ResponseEnum;
    import com.fca.uconnect.global.GlobalUconnectExtVehicleMessaging.VehicleMessageDispositionPublish;
    import com.fca.uconnect.global.GlobalUconnectExtVehicleMessaging.VehicleMessageDispositionPublish.MessageDispositionEnum;
    import com.google.protobuf.ByteString;
    import com.google.protobuf.ExtensionRegistry;
    import com.google.protobuf.InvalidProtocolBufferException;

    /**
     * This example class demonstrates how to use the AWS IoT mqtt client to send a Uconnect In Vehicle message Acknowledgement to the SDP .
     * This code is only for reference and is furnished without warranty.....
     *
     * @author FCA Global V2C API Team
     *
     */
    public class TBMExampleForVehMessaging {

    	private String clientId; // The clientId is unique to the device and obtained from the client X.509 certificate CN.
    	private int messageId; // The messageId is a sequential number incremented and assigned to each message sent from the client.
    	private AWSIotMqttClient mqttClient; // The mqtt client object from the AWS IoT client library.
    	private AWSIotTopic iotTopic; // The Topic object to subscribe for inbound messages.
    	private ExtensionRegistry extRegistry; // Google protocol buffers extension registry instance.
    	private int correlationId = 0;// The correlationId is a sender messageId so that Sender can recognize the message once its received response.
    	List messages ;//This is for Junit Tests.
    	private Semaphore semaphore;//The semaphore object is used to wait for a response.

    	/**
    	 * Constructor - initialize protocol buffer extension registry for parsing incoming Uconnect Messages.
    	 */
    	public TBMExampleForVehMessaging() {
    		extRegistry = ExtensionRegistry.newInstance();
    		extRegistry.add(GlobalUconnectExtVehicleMessaging.vehicleMessagePublish);
    		this.semaphore = new Semaphore();
    	}

    	/**
    	 * This method generates a Protocol Buffer Uconnect Message given the required inputs for VehicleMessage Ack
    	 * @param response
    	 * @param vehMsgId
    	 * @return
    	 */
    	public UconnectMessage getVehicleMessagingAckMsg(ResponseEnum response,ByteString vehMsgId) {
    		this.messageId++;
    		VehicleMessageAck ackMsg = VehicleMessageAck.newBuilder()
    				.setStatus(response)
    				.setVehicleMessageID(vehMsgId)
    				.setMessageReceiptTimestamp(System.currentTimeMillis())
    				.build();
    		UconnectMessage msg = UconnectMessage.newBuilder()
    			.setTimestamp(System.currentTimeMillis())
    			.setMessageId(messageId)
    			.setCorrelationId(correlationId)
    			.addMessages(UconnectAny.newBuilder().
    			 setExtension(GlobalUconnectExtVehicleMessaging.vehicleMessageAck,ackMsg))
    			.build();
    		return msg;
    	}
    	public UconnectMessage getVehicleMessagingDispPubMsg(long messageDisplayTimestamp,
    			long messageHMIDispositionEventTimestamp,ByteString vehicleMessageID,MessageDispositionEnum dispEnum) {
    		this.messageId++;
    		VehicleMessageDispositionPublish vehDispPubMsg = VehicleMessageDispositionPublish.newBuilder()
    				.setMessageDisplayTimestamp(messageDisplayTimestamp)
    				.setMessageHMIDispositionEventTimestamp(messageHMIDispositionEventTimestamp)
    				.setVehicleMessageID(vehicleMessageID)
    				.setDisposition(dispEnum)
    				.build();
    		UconnectMessage msg = UconnectMessage.newBuilder()
    			.setTimestamp(System.currentTimeMillis())
    			.setMessageId(messageId)
    			.setCorrelationId(correlationId)
    			.addMessages(UconnectAny.newBuilder().
    			 setExtension(GlobalUconnectExtVehicleMessaging.vehicleMessageDispositionPublish, vehDispPubMsg))
    			.build();
    		return msg;
    	}

    	/**
    	 * This method demonstrates connecting to the AWS IoT mqtt broker and publishing an Vehicle message Ack to the In Vehicle Message topic.
    	 */
    	public void process() {

    		mqttClient = new AWSIotMqttClient("endpoint", clientId, "awsAccessKeyId", "awsSecretAccessKey");
    		try {
    			mqttClient.connect();
    			iotTopic = new AWSIotTopic(clientId+"/IVM/", AWSIotQos.QOS1) {
    				public void onMessage(AWSIotMessage msg) {
    					UconnectMessage msgIn = null;
    					try {
    						msgIn = UconnectMessage.parseFrom(msg.getPayload(),extRegistry);
    					} catch (InvalidProtocolBufferException e) {
    					}
    					if(msgIn.getMessages(0).hasExtension(GlobalUconnectExtVehicleMessaging.vehicleMessagePublish)){
    						semaphore.unlock();// Releasing the lock
    						GlobalUconnectExtVehicleMessaging.VehicleMessagePublish msgToDisplay = msgIn.getMessages(0).getExtension(GlobalUconnectExtVehicleMessaging.vehicleMessagePublish);
    						correlationId = msgIn.getMessageId();
    						ByteString vehMsgId = ByteString.copyFrom(new byte[18]);//This is just an example
    						sendMessage(getVehicleMessagingAckMsg(ResponseEnum.MESSAGE_STAGED_FOR_DISPLAY,vehMsgId));
    						long dispTime = System.currentTimeMillis();

    						try {
    							Thread.sleep(10000);
    						} catch (InterruptedException e) {
    						}
    						long dispositionTime = System.currentTimeMillis();
    						sendMessage(getVehicleMessagingDispPubMsg(dispTime,
    						dispositionTime,vehMsgId,MessageDispositionEnum.MESSAGE_DISPLAY_CANCELLED));
    				}
    			}};
    			mqttClient.subscribe(iotTopic);
    		} catch (AWSIotException ex) {
    			System.out.println("Caught AWS Exception "+ex);
    			ex.printStackTrace();
    		}  catch (Exception e) {
    			e.printStackTrace();
    		}
    		try {
    			this.semaphore.lock();// lock thread
    		} catch (InterruptedException e) {
    		}
    	}
    	/**
    	 * This method publishes the message to VehicleMessaging topic
    	 */
    	public void sendMessage(UconnectMessage msg) {
    		final byte[] msgOut = msg.toByteArray();
    		new Thread(new Runnable() {

    		    @Override
    		public void run() {
    		try {
    			AWSIotMessage message = new
    					MessagePublisherListener("/IVM/"+clientId,AWSIotQos.QOS1,msgOut);
    			mqttClient.publish(message);

    		} catch (AWSIotException e) {
    			System.out.println("Caught Exception "+e);
    						e.printStackTrace();
    					}
    			    }
    			}).start();
    		}

    	/**
    	 * Example main to launch example.
    	 *
    	 * @param args
    	 */
    	public static void main(String[] args) {
    		TBMExampleForVehMessaging example = new TBMExampleForVehMessaging();
    		example.process();
    	}
    }

Here's an example of how Service Connects to AWS IOT MQTT for InVehicleMessaging topics and Send Vehicle Messages and receive Acknowledgement from Vehicle.

Service Example Code (SDP):

    package com.fca.uconnect.global;
    import java.util.ArrayList;
    import java.util.List;

    import com.amazonaws.services.iot.client.AWSIotException;
    import com.amazonaws.services.iot.client.AWSIotMessage;
    import com.amazonaws.services.iot.client.AWSIotMqttClient;
    import com.amazonaws.services.iot.client.AWSIotQos;
    import com.amazonaws.services.iot.client.AWSIotTopic;
    import com.fca.uconnect.global.GlobalUconnectControl.UconnectAny;
    import com.fca.uconnect.global.GlobalUconnectControl.UconnectMessage;
    import com.fca.uconnect.global.GlobalUconnectExtVehicleMessaging.VehicleMessagePublish;
    import com.fca.uconnect.global.GlobalUconnectExtVehicleMessaging.VehicleMessagePublish.LanguageString;
    import com.fca.uconnect.global.GlobalUconnectExtVehicleMessaging.VehicleMessagePublish.MessageType;
    import com.google.protobuf.ExtensionRegistry;

    public class SDPExampleForVehMessaging {
    private String clientId; // The clientId is unique to the device and obtained from the client X.509 certificate CN.
    private int messageId; // The messageId is a sequential number incremented and assigned to each message sent from the client.
    private AWSIotMqttClient mqttClient; // The mqtt client object from the AWS IoT client library.
    private AWSIotTopic iotTopic; // The Topic object to subscribe for inbound messages.
    private ExtensionRegistry extRegistry; // Google protocol buffers extension registry instance.
    private List messages;//This is for Junit Tests.

    public SDPExampleForVehMessaging() {
    	extRegistry = ExtensionRegistry.newInstance();
    	extRegistry.add(GlobalUconnectExtVehicleMessaging.vehicleMessageAck);
    	extRegistry.add(GlobalUconnectExtVehicleMessaging.vehicleMessageDispositionPublish);
    }
    public UconnectMessage getVehicleMessagingPubMsg(String vin,MessageType messageType,LanguageString lang) {
    	messageId++;
    	VehicleMessagePublish pubMsg = VehicleMessagePublish.newBuilder()
    			.setVin(vin)
    			.setMessageType(messageType)
    			.addMessage(lang)
    			.build();

    	UconnectMessage msg = UconnectMessage.newBuilder()
    		.setTimestamp(System.currentTimeMillis())
    		.setMessageId(messageId)
    		.addMessages(UconnectAny.newBuilder().
    		 setExtension(GlobalUconnectExtVehicleMessaging.vehicleMessagePublish,pubMsg))
    		.build();

    	return msg;
    }

    /**
     * This method demonstrates connecting to the AWS IoT mqtt broker and Subscribing  an Parental Control message to the VehicleMessaging topic.
     */
    public void process() {

    	mqttClient = new AWSIotMqttClient("endpoint", clientId, "awsAccessKeyId", "awsSecretAccessKey");
    try {
    mqttClient.connect();
     iotTopic = new AWSIotTopic("/IVM/#",AWSIotQos.QOS1){
    	public void onMessage(AWSIotMessage msg) {
    try {
    	UconnectMessage	msgIn = UconnectMessage.parseFrom(msg.getPayload(),extRegistry);
    	if(msgIn.getMessages(0).hasExtension(GlobalUconnectExtVehicleMessaging.vehicleMessageAck)){
    		GlobalUconnectExtVehicleMessaging.VehicleMessageAck acknowledgement= msgIn.getMessages(0).getExtension(GlobalUconnectExtVehicleMessaging.vehicleMessageAck);
    		if(messages==null)
    			messages = new ArrayList();
    		messages.add(msgIn.getMessages(0));
    	}
    } catch( Exception ex) {
    	ex.printStackTrace();
    }
    }
    };
    LanguageString lang = LanguageString.newBuilder()
    .setLanguage("ENGLISH")
    .setMessageText("Your Vehicle is Due for Service")
    .build();

    sendMessage(getVehicleMessagingPubMsg("1HGCM82633A004352",MessageType.SERVICE_NOTICE,lang));
    mqttClient.subscribe(iotTopic);

    } catch (AWSIotException e) {
    	System.out.println("Caught Exception "+e);
    	e.printStackTrace();
    }
    }

    public void sendMessage(UconnectMessage msg) {
    final byte[] msgOut = msg.toByteArray();
    new Thread(new Runnable() {
        @Override
    public void run() {
    try {
    	AWSIotMessage message = new
    			MessagePublisherListener(clientId+"/IVM/",AWSIotQos.QOS1,msgOut);
    	mqttClient.publish(message);

    } catch (AWSIotException e) {
    	System.out.println("Caught Exception "+e);
    				e.printStackTrace();
    			}
    	    }
    	}).start();
    }
    public static void main(String[] args) {
    	SDPExampleForVehMessaging m = new SDPExampleForVehMessaging();
    	m.process();
    }
    }

The example code demonstrates how to connect with AWS IoT for publishing and subscribing to the InVehicle Messaging topic.

Download Client Example Code here

Download Service Example Code here