    /**********************************************************************************************
     * 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 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.DRM.AppDrm;
    import com.fca.uconnect.global.GlobalUconnectControl.DRM.AppDrm.DRMContent;
    import com.fca.uconnect.global.GlobalUconnectControl.DRM.AppDrm.DRMRegistration;
    import com.fca.uconnect.global.GlobalUconnectControl.DRM.AppDrm.DRMRegistration.OperationEnum;
    import com.fca.uconnect.global.GlobalUconnectControl.DRM.AppDrm.DRMRegistration.RegistrationStatusEnum;
    import com.fca.uconnect.global.GlobalUconnectControl.DRMService;
    import com.fca.uconnect.global.GlobalUconnectControl.DRM;
    import com.fca.uconnect.global.GlobalUconnectControl.UconnectAny;
    import com.fca.uconnect.global.GlobalUconnectControl.UconnectMessage;
    import com.fca.uconnect.global.GlobalUconnectExtAOTA.DiscrepancyCheck;
    import com.fca.uconnect.global.GlobalUconnectExtAOTA.UpdateStatusNotification;
    import com.fca.uconnect.global.GlobalUconnectExtAOTA.UpdateStatusNotification.StatusEnum;
    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 AOTA message to the SDP and wait for a response message.
     * This code is only for reference and is furnished without warranty.....
     *
     * @author FCA Global V2C API Team
     *
     */
    public class TBMExampleForAOTA {

    	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 boolean receivedResponse = false; // flag to wait for the response as part of this example.
    	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.
    	/**
    	 * Constructor - initialize protocol buffer extension registry for parsing incoming Uconnect Messages.
    	 */
    	public TBMExampleForAOTA() {
    		extRegistry = ExtensionRegistry.newInstance();
    		extRegistry.add(GlobalUconnectExtAOTA.applicationUpdateNotification);
    		extRegistry.add(GlobalUconnectExtAOTA.initiateDiscrepancyCheck);
    	}
    	public void disconnect(){
    		try {
    			mqttClient.disconnect();
    		} catch (AWSIotException e) {
    			e.printStackTrace();
    		}
    	}
    	/**
    	 * This method generates a Protocol Buffer Uconnect Message given the required inputs for AOTA Response.
    	 *
    	 * @return
    	 */
    	public UconnectMessage getAOTARespMsg(StatusEnum repsonse){
    			messageId++;
    			UpdateStatusNotification respMsg = UpdateStatusNotification.newBuilder()
    					.setStatus(repsonse)
    					.build();
    		UconnectMessage msg = UconnectMessage.newBuilder()
    			.setTimestamp(System.currentTimeMillis())
    			.setMessageId(messageId)
    			.setCorrelationId(correlationId)
    			.addMessages(UconnectAny.newBuilder().
    			 setExtension(GlobalUconnectExtAOTA.updateStatusNotification, respMsg))
    			.build();

    		return msg;
    	}

    	public UconnectMessage getDescCheckMsg(){
    		messageId++;
    		DRMRegistration regiMsg = DRMRegistration.newBuilder()
    				.setOperation(OperationEnum.RESET)
    				.setRegistrationStatus(RegistrationStatusEnum.BASIC_STAGE)
    				.build();
    		//Only few fields added in this example
    				DRMService drmService = DRMService.newBuilder()
    						.setAppIdentifier("APPIDENTIFIER")
    						.setEmailId("EMAILID")
    						.setFileName("FILENAME")
    						.setInstallerType("INSTALLER TYPE")
    						.build();
    		DRMContent drmContent = DRMContent.newBuilder()
    				.setDrmService(0, drmService)
    				.setApplicationType("APPTYPE")
    				.setMsisdn("MSISDN")
    				.build();
    		AppDrm appDrm = AppDrm.newBuilder()
    				.setDrmRegistration(regiMsg)
    				.setAmsDRM(drmContent)
    				.build();
    		DRM drm = DRM.newBuilder()
    				.setAppDrm(appDrm)
    				.build();
    		DiscrepancyCheck descCheckMsg = DiscrepancyCheck.newBuilder()
    				.setDrm(drm)
    				.build();

    	UconnectMessage msg = UconnectMessage.newBuilder()
    		.setTimestamp(System.currentTimeMillis())
    		.setMessageId(messageId)
    		.setCorrelationId(correlationId)
    		.addMessages(UconnectAny.newBuilder().
    		 setExtension(GlobalUconnectExtAOTA.discrepancyCheck, descCheckMsg))
    		.build();
    	return msg;
    }
    	/**
    	 * This method demonstrates connecting to the AWS IoT mqtt broker and publishing an AOTA message to the AOTA topic.
    	 */
    	public void process() {

    		mqttClient = new AWSIotMqttClient("endpoint", clientId, "awsAccessKeyId", "awsSecretAccessKey");
    		try {
    			mqttClient.connect();

    			iotTopic = new AWSIotTopic(clientId+"/AOTA/", AWSIotQos.QOS1) {
    				public void onMessage(AWSIotMessage msg) {
    					UconnectMessage msgIn = null;
    					try {
    						msgIn = UconnectMessage.parseFrom(msg.getPayload(),extRegistry);
    					} catch (InvalidProtocolBufferException e) {
    						e.printStackTrace();
    					}
    					if(msgIn.getMessages(0).hasExtension(GlobalUconnectExtAOTA.initiateDiscrepancyCheck)){
    						//receive Initiate  and send DRM to SDP
    						correlationId=msgIn.getMessageId();
    						sendMessage(getDescCheckMsg());
    					}else if ((msgIn.getMessages(0).hasExtension(GlobalUconnectExtAOTA.applicationUpdateNotification))){

    						correlationId=msgIn.getMessageId();
    						sendMessage(getAOTARespMsg(StatusEnum.SUCCESS));
    					}
    				}
    			};
    			mqttClient.subscribe(iotTopic);
    		} catch (AWSIotException ex) {
    			System.out.println("Caught AWS Exception "+ex);
    			ex.printStackTrace();
    		}
    	}
    	/**
    	 * This method publishes the message to AOTA topic
    	 */
    	public void sendMessage(UconnectMessage msg) {
    		final byte[] msgOut = msg.toByteArray();
    		new Thread(new Runnable() {

    		    @Override
    		public void run() {
    		try {
    			mqttClient.publish("/AOTA/"+clientId, AWSIotQos.QOS1, msgOut);
    		} catch (AWSIotException e) {
    			System.out.println("Caught Exception "+e);
    						e.printStackTrace();
    					}
    			    }
    			}).start();
    		}
    	/**
    	 * Example main to launch example.
    	 *
    	 */
    	public static void main(String[] args) {
    		TBMExampleForAOTA example = new TBMExampleForAOTA();
    		example.process();
    	}
    }

Here's an example of how SDP Connects to AWS IOT MQTT for AOTA topics.

Service Example Code (SDP):

    package com.fca.uconnect.global;

    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.GlobalUconnectExtAOTA.ApplicationUpdateNotification;
    import com.fca.uconnect.global.GlobalUconnectExtAOTA.InitiateDiscrepancyCheck;
    import com.google.protobuf.ExtensionRegistry;

    public class SDPExampleForAOTA {
    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.

    public SDPExampleForAOTA() {
    	extRegistry = ExtensionRegistry.newInstance();
    	extRegistry.add(GlobalUconnectExtAOTA.discrepancyCheck);
    	extRegistry.add(GlobalUconnectExtAOTA.updateStatusNotification);
    }
    //Disconnects MQTT
    public void disconnect(){
    	try {
    		mqttClient.disconnect();
    	} catch (AWSIotException e) {
    		e.printStackTrace();
    	}
    }
    public UconnectMessage getInitiateDescMsg(){
    	messageId++;
    	InitiateDiscrepancyCheck descCheckmsg = InitiateDiscrepancyCheck.newBuilder()
    			.build();
    	UconnectMessage msg = UconnectMessage.newBuilder()
    			.setTimestamp(System.currentTimeMillis())
    			.setMessageId(messageId)
    			.addMessages(UconnectAny.newBuilder().
    			 setExtension(GlobalUconnectExtAOTA.initiateDiscrepancyCheck, descCheckmsg))
    			.build();

    		return msg;
    }
    public UconnectMessage getAppUpdateNotifyMsg(String appId,String description,long expireTime,
    			int size,String version,String checkSum,String url) {
    	messageId++;

    	ApplicationUpdateNotification updateNotifyMsg = ApplicationUpdateNotification.newBuilder()
    			.setAppId(appId)
    			.setDescription(description)
    			.setExpireDate(expireTime)
    			.setPackageSize(size)
    			.setChecksum(checkSum)
    			.setVersion(version)
    			.setUrl(url)
    			.build();

    	UconnectMessage msg = UconnectMessage.newBuilder()
    		.setTimestamp(System.currentTimeMillis())
    		.setMessageId(messageId)
    		.addMessages(UconnectAny.newBuilder().
    		 setExtension(GlobalUconnectExtAOTA.applicationUpdateNotification, updateNotifyMsg))
    		.build();

    	return msg;
    }

    public void process() {
    	mqttClient = new AWSIotMqttClient("endpoint", clientId, "awsAccessKeyId", "awsSecretAccessKey");
    try {
    mqttClient.connect();
     iotTopic = new AWSIotTopic("/AOTA/#",AWSIotQos.QOS1){
    	public void onMessage(AWSIotMessage msg) {
    try {
    	UconnectMessage	msgIn = UconnectMessage.parseFrom(msg.getPayload(),extRegistry);
    	if(msgIn.getMessages(0).hasExtension(GlobalUconnectExtAOTA.discrepancyCheck)){
    		//Receive Discrepancy Check Message
    		//send app update
    		long expireTime = System.currentTimeMillis()+1000000;
    		sendMessage(getAppUpdateNotifyMsg("APPID","DESCRPTION",expireTime,32,"VERSION","CHECKSUM","URL"));
        }

    } catch( Exception ex) {
    	ex.printStackTrace();
    	System.out.println("Err processing message: "+ex+", try parsing AOTA.");
    }
    }
    };
    mqttClient.subscribe(iotTopic);
    sendMessage(getInitiateDescMsg());

    } 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 {
    	mqttClient.publish(clientId+"/AOTA/", AWSIotQos.QOS1, msgOut);
    } catch (AWSIotException e) {
    	System.out.println("Caught Exception "+e);
    				e.printStackTrace();
    			}
    	    }
    	}).start();
    }
    public static void main(String[] args) {
    	SDPExampleForAOTA m = new SDPExampleForAOTA();
    	m.process();
    }
    }

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

Download Client Example Code here

Download Service Example Code here