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IBM® WebSphere® Front cover Building Smarter Planet Solutions with MQTT and IBM WebSphere MQ Telemetry Introduces MQTT and includes scenarios that demonstrate its capabilities Provides a quick guide to getting started with MQTT Includes typical usage patterns and guidance on scaling a solution Valerie Lampkin Weng Tat Leong Leonardo Olivera Sweta Rawat Nagesh Subrahmanyam Rong Xiang ibm.com/redbooks International Technical Support Organization Building Smarter Planet Solutions with MQTT and IBM WebSphere MQ Telemetry September 2012 SG24-8054-00 Note: Before using this information and the product it supports, read the information in “Notices” on page vii. First Edition (September 2012) This edition applies to Version 7, Release 1 of WebSphere MQ. © Copyright International Business Machines Corporation 2012. All rights reserved. Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Notices . vii Trademarks . viii Preface . ix The team who wrote this book . ix Primary authors. ix Additional authors . .x Additional contributors . xi Now you can become a published author, too! . xi Comments welcome. xii Stay connected to IBM Redbooks publications . xii Chapter 1. Overview of MQTT . 1 1.1 Building a Smarter Planet . 2 1.1.1 Internet of Things . 2 1.1.2 Smarter Planet . 3 1.1.3 Telemetry and the Internet . 4 1.2 MQTT and WebSphere MQ Telemetry . 4 1.2.1 MQ Telemetry Transport. 4 1.2.2 WebSphere MQ Telemetry . 5 1.2.3 Basic concepts of MQTT. 6 1.2.4 Comparison between MQTT and HTTP . 7 1.2.5 MQTT and Eclipse Paho. 8 1.2.6 MQTT and open source . 10 1.3 Benefits of using MQTT . 12 1.4 Where to use MQTT . 14 1.4.1 Example implementations of MQTT . 14 1.4.2 Machine-to-machine . 17 1.4.3 MQTT and sensors . 18 Chapter 2. Getting started with MQTT. 21 2.1 Clients and brokers used in this book . 22 2.1.1 MQTT clients. 22 2.1.2 MQTT brokers. 23 2.2 Scenario used in this book . 24 2.2.1 Business challenge . 24 2.2.2 MQTT-enabled solution . 25 2.3 MQTT concepts. 26 2.3.1 MQTT messaging . 26 2.3.2 Client programming. 27 2.4 MQTT brokers . 28 2.4.1 Really Small Message Broker. 29 2.4.2 Mosquitto . 30 2.4.3 WMQTT Utility. 33 2.5 Building a sample MQTT application with freely available software . 35 2.5.1 Preparation . 35 2.5.2 Building the sample MQTT application . 36 2.5.3 Publisher and subscriber in Java . 37 2.5.4 Publisher and subscriber in C . 45 © Copyright IBM Corp. 2012. All rights reserved. iii Chapter 3. Using MQTT with IBM WebSphere MQ Telemetry . 55 3.1 Installing, configuring, and managing WebSphere MQ Telemetry . 56 3.1.1 Before you begin. 56 3.1.2 Installing WebSphere MQ . 57 3.1.3 Verifying the installation of WebSphere MQ Telemetry . 59 3.1.4 Configuring a queue manager for WebSphere MQ Telemetry . 65 3.1.5 Authorizing MQTT clients to access WebSphere MQ. 72 3.1.6 Enabling the security features of WebSphere MQ for telemetry channels . 74 3.1.7 Configuring WebSphere MQ to send messages to MQTT clients . 76 3.1.8 Performance considerations for WebSphere MQ Telemetry . 77 3.2 Building a simple solution using WebSphere MQ Telemetry . 80 3.2.1 Solution overview . 80 3.2.2 Solution implementation . 81 3.3 WebSphere MQ classes for Java Message Service . 98 3.3.1 Sample applications . 99 3.3.2 Troubleshooting . 105 3.4 WebSphere MQ Telemetry daemon for devices . 105 3.4.1 Installing and configuring the WebSphere MQ Telemetry daemon for devices . 107 3.4.2 WebSphere MQ Telemetry daemon for devices bridges . 107 3.4.3 Sample implementations of WebSphere MQ Telemetry daemon for devices. 109 3.5 Troubleshooting WebSphere MQ Telemetry. 122 3.5.1 Location of logs and error files . 123 3.5.2 Tracing the telemetry service . 124 Chapter 4. Integrating MQTT . 127 4.1 Integrate MQTT with IBM WebSphere Message Broker. 128 4.1.1 IBM WebSphere Message Broker versions . 128 4.1.2 Example 1: MQInput node . 129 4.1.3 Example 2: JMSInput node. 133 4.2 Integrate MQTT with IBM WebSphere Application Server . 136 4.2.1 Assumptions . ..
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