The Wearable Application Server Holly Cummins cumminsh@uk.ibm.com @holly_cummins © 2009 IBM Corporation
A presentation at JFokus in February 2013 in Stockholm, Sweden by Holly Cummins
The Wearable Application Server Holly Cummins cumminsh@uk.ibm.com @holly_cummins © 2009 IBM Corporation
Some context … © 2012 IBM Corporation
“Computers in the future may weigh no more than 1.5 tons.” Popular Mechanics, 1949 © 2012 IBM Corporation
“I think there is a world market for maybe five computers.” Thomas Watson chairman of IBM 1943 © 2012 IBM Corporation
Then: HARDware © 2012 IBM Corporation
Now: Everyware © 2012 IBM Corporation
© 2012 IBM Corporation
“If your background is in the programming of PCs or even more powerful computers, a fair warning: embedded programming for low-cost devices means working with very limited resources …” © 2012 IBM Corporation
“… This is in shocking contrast with the World Wide Web, where technologies usually seem to be created with utmost inefficiency as a goal…” © 2012 IBM Corporation
“… Embedded programming requires more careful consideration of how resources are used than what is needed for PCs or servers…” © 2012 IBM Corporation
“… Embedded platforms only provide small sub- sets of the functionality of their larger cousins, which may require some inventiveness and work where a desired feature is not available directly.” © 2012 IBM Corporation
June, 2011 © 2012 IBM Corporation
Spot the difference ■ Netduino Plus ■ Raspberry Pi © 2012 IBM Corporation
Spot the difference ■ Application server, circa 2010 ■ Application server, circa 2012 © 2012 IBM Corporation
What’s it good for? © 2012 IBM Corporation
Programming for developers ■ Easy install ■ Fast server start ■ Fast and transparent application deployment ■ Convention over configuration ■ Source-controllable configuration ■ Nifty t-shirts © 2012 IBM Corporation
What’s it good for? (ii) © 2012 IBM Corporation
Programming for the Cloud Density ■ Small download ■ Small memory footprint Elasticity © 2012 IBM Corporation
Programming for the Cloud Density Elasticity ■ ■ Small download ■ Small memory footprint Enable and disable function – ■ For extra points, do it dynamically Easy install – Easy uninstall © 2012 IBM Corporation
Good for anything else? © 2012 IBM Corporation
Ubiquitous computing++ © 2012 IBM Corporation
Ubiquitous computing++ © 2012 IBM Corporation
Old new-world ■ Mobile technology a trend only on the client-side ■ Why? ■ Clients are mobile ■ Servers are not mobile – Obviously © 2012 IBM Corporation
New new-world ■ Servers are lightweight ■ Seriously - they literally don’t weigh much ■ Move from location-based services to locate-able services © 2012 IBM Corporation
WAS Liberty Profile ■ New in WebSphere Application Server 8.5 ■ Free for developers ■ Free tools ■ Very very lightweight – – – ■ No restarts! 50 MB download 60 MB footprint for biggish JEE app Starts in under 5s Entirely modular and dynamic © 2012 IBM Corporation
Modularity and dynamism © 2012 IBM Corporation
How can it be full-featured? © 2012 IBM Corporation
Where can the Liberty profile go? Nexus 7 tablet Asus Transformer © 2012 IBM Corporation
Where can the Liberty profile go? Old Android phone © 2012 IBM Corporation
Where can the Liberty profile go? Raspberry Pi © 2012 IBM Corporation
The Raspberry Pi ■ £25 ■ £25! ■ 1.6 oz ■ 700 MHz ARM 11 processor ■ 256 MB RAM (shared with GPU) ■ Up to 4 GB SanDisk © 2012 IBM Corporation
But what about the hat? ■ And why on earth would you want to do that? ■ ‘True’ location-based service ■ Collaboration without internet © 2012 IBM Corporation
Demo-time www.wasdev.net © 2012 IBM Corporation
Pi lessons learned ■ James Bond Wifi – – “For your eyes only” Power supply is an issue ■ A hat is a hot environment for a server :) ■ Solution: failover pi! – At £25, why not? © 2012 IBM Corporation
Can we do better? ■ Yes. ■ Built-in battery ● A built-in battery can’t work itself loose mid-demo :) ● Built-in wi-fi ● Built-in wi-fi doesn’t die mid-demo ● A phone has enough (electric) power to host an adhoc wifi network © 2012 IBM Corporation
The problem Holly, in Stockholm Tom, in London © 2012 IBM Corporation
No problem! ■ We have a Nexus 7, too! © 2012 IBM Corporation
Demo-time (again) www.wasdev.net © 2012 IBM Corporation
The problem ■ We updated the Nexus 7 :( – It needs rooting again © 2012 IBM Corporation
Any questions? www.wasdev.net © 2012 IBM Corporation
