September 2012
Intermediate to advanced
268 pages
8h 7m
English
book
Building Smarter Planet Solutions with MQTT and IBM WebSphere MQ Telemetry
by Valerie Lampkin, Weng Tat Leong, Leonardo Olivera, Sweta Rawat, Nagesh Subrahmanyam, Rong Xiang, Martin Keen
Content preview from Building Smarter Planet Solutions with MQTT and IBM WebSphere MQ Telemetry
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28 Building Smarter Planet Solutions with MQTT and IBM WebSphere MQ Telemetry
Client identifier
The client identifier is a 23-byte string that identifies an MQTT client. Each identifier must be
unique to only one connected client at a time. In order to keep the identifier short and unique,
developers typically introduce an identifier generation mechanism, such as creating it from
the 48-bit device MAC address. If transmission size is not a critical issue, you may use the
remaining 17 bytes to make the address easier to administer, such as by inserting some
human-readable text in the identifier.
Retained publications
Publications (messages) for a given topic can be retained and delivered when new
subscribers sign up for the topic. Publishers must ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.