M2M for Java Developers MQTT with Eclipse Paho Dominik Obermaier - - PowerPoint PPT Presentation

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M2M for Java Developers MQTT with Eclipse Paho Dominik Obermaier - - PowerPoint PPT Presentation

Nov 23, 2022 279 likes •971 views

M2M for Java Developers MQTT with Eclipse Paho Dominik Obermaier @dobermai passionate CTO @ dc-square Architect and Maker Member of the OASIS Regular speaker and MQTT TC author HiveMQ Architect M2M? TECHNOLOGY THA T SUPPORTS WIRED

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M2M for Java Developers

MQTT with Eclipse Paho

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Dominik Obermaier

@dobermai CTO @ dc-square passionate Architect and Maker Member of the OASIS MQTT TC Regular speaker and author HiveMQ Architect

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M2M?

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TECHNOLOGY THA T SUPPORTS WIRED OR WIRELESS COMMUNICA TION BETWEEN DEVICES

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IoT?

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Things?

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Why should we care?

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2010 2015 2020

~6.909.000.000 ~7.302.000.000 ~7.675.000.000 ~12.500.000.000 ~25.000.000.000 ~50.000.000.000

[1]Source: http://www.un.org/esa/population/publications/wpp2008/wpp2008_highlights.pdf [1] [2]Source: http://share.cisco.com/internet-of-things.html [2]

“Things” in the Internet

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SLIDE 17 12,500,000,000 25,000,000,000 37,500,000,000 50,000,000,000 2010 2015 2020

People Things

“Things” in the Internet

1.8x 3.4x 6.5x

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Another revolution?

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SLIDE 19 Screenshot Taken from Oracle JavaOne Strategic Keynote 2013
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Protocols?

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Requirements for a IoT protocol

✓ efficient in bandwidth ✓ scalable ✓ standardized ✓ open ✓ data agnostic ✓ must be suited for constrained devices AND

server infrastructure

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HTTP?

Request / Response Verbose Polling instead of Push No quality of service How to get notified if clients die? Stateless

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Why MQTT?

✓ Simple ✓ Efficient ✓ Publish / Subscribe ✓ Quality of Service Levels ✓ Last Will and Testament ✓ Designed for unreliable networks

K Wireless? Yep, then it probably is unreliable

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MQTT vs HTTPs

✓ 93x faster (throughput) ✓ 11x less battery when publishing ✓ 170x less battery when receiving messages ✓ 8x less network overhead

http://stephendnicholas.com/archives/1217
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Oil pipeline

http://www.eurotech.com/en/press+room/news/?506
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Sprint Velocity

https://www.facebook.com/notes/facebook-engineering/building-facebook-messenger/10150259350998920
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Logistics

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Facebook Messenger

https://www.facebook.com/notes/facebook-engineering/building-facebook-messenger/10150259350998920
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Sports

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Google Trends

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1999 2010 2013 2014

MQTT invented by IBM and Arcom (Eurotech) royalty free OASIS TC formed MQTT is OASIS standard

History

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Publish / Subscribe

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Publish / Subscribe

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MQTT Topics

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MQTT Topics

MQTT/is/awesome MQTT/is/fantastic Bacon/is/awesome MQTT/looks/fantastic MQTT/looks/fantastic

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MQTT Topics

MQTT Bacon is awesome looks fantastic

MQTT/is/awesome

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MQTT Topics

MQTT Bacon is awesome looks fantastic

Bacon/is/awesome

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MQTT Topic Level Wildcard

MQTT Bacon is awesome looks fantastic

+/is/awesome

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MQTT Topic Level Wildcard

MQTT Bacon is awesome looks fantastic

+/is/+

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MQTT Wildcard

MQTT Bacon is awesome looks fantastic

MQTT/#

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MQTT Wildcard

MQTT Bacon is awesome looks fantastic

#

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Quality of Service Levels

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Last Will and Testament

MQTT Broker

Connect with LWT topic “clientA/lwt”

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Last Will and Testament

MQTT Broker

Subscribe to topic “clientA/lwt”

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Last Will and Testament

MQTT Broker

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Last Will and Testament

MQTT Broker

Broker detects ‘death’ of ClientA

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Last Will and Testament

MQTT Broker

Broker publishes LWT of ClientA

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Broker Implementations

+ others

Extensive list of brokers available at http://mqtt.org/wiki/doku.php/brokers
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SLIDE 50 QoS QoS 1 QoS 2 Auth Bridge $SYS SSL dynamic topics cluster websockets plugins HiveMQ ✔ ✔ ✔ ✔

✔ ✔ ✔ ✔ ✔ ✔ ✔

mosquitto ✔ ✔ ✔ ✔

✔ ✔ ✔ ✔ X X ✔

RSMB

✔ ✔ ✔ ✔ ✔ ✔ X ✔ X X X

RabbitMQ ✔ ✔ X ✔

X X ✔ ✔ ? ? ?

ActiveMQ ✔ ✔ ✔

? X X ? ? ? ✔ ?

Broker Implementations

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MQTT over Websockets

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Why MQTT over websockets?

✓ Every Browser is a ‘device’ ✓ Device-to-Browser Push ✓ Broadcasting to all online users ✓ Detect if a user is offline ✓ Direct Browser-to-device push ✓ Minimum payload ✓ No application-specific protocol

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MQTT Libraries

  • Paho (Java, Javascript, Python, C, C++,

ObjectiveC, Lua, Go)

  • .Net
  • Ruby
  • Erlang
  • Node.js
  • and many more
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OK, got it. How to start hacking?

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Java!

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What is Paho?

✓ Scalable Open Source Implementations of M2M

standard protocols

✓ Focus on MQTT ✓ Implementations in Java, Javascript, Lua,

C, C++, Go and Python

✓ Eclipse Incubator

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11/2011 03/2012 04/2013 11/2012 08/2013

contribution of IBM announced at EclipseCon Europe first version in GIT Release v0.1 Release v0.2 Release v0.4.0

Paho - Java

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Eclipse Paho

✓ “Reference Implementation” ✓ Active Community ✓ Blocking and Async API

  • Not in Maven Central :-(
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DEMO!

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Fusesource MQTT Client

✓ 3 API Styles ✓ Very easy to intercept ✓ Based on HawtIO ✓ Very performant ✓ In Maven Central

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DEMO!

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https://github.com/dobermai/bedcon-mqtt-clients

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THANK YOU!

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Bridging

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Clustering