My talk from Java2days 2015 conference about Nashorn and some real world examples. Github repository has all code samples: https://github.com/mgruca/nashorn_example

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Nashorn, what is the
whole buzz about

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Ask questions
By The U.S. Army

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I love your feedback! 
@michalgruca
michal.gruca@gmail.com
www.rits.pl

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GENERAL
NASHORN

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• yet another js runtime -> on server
built on top of Java
quite fast
EcmaScript 5.1 compatible
Nashorn is …
By Valentina Storti

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Allows to build DSL
Runtime modularity
Full access from .js to JVM
A lot of developers on market
Simple language
Even your user may try it
Why to use

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Or because …

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GENERAL
NASHORN :: DEMO

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TWO WAY INTEROPERABILITY
NASHORN :: DEMO

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TESTING
NASHORN :: DEMO

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VALIDATION
NASHORN :: DEMO

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SCRIPTING
NASHORN :: DEMO

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PROJECT AVATAR
NASHORN

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• Project Avatar is a JavaScript service
layer, that fully utilizes Nashorn
Engine.
• It aims at reducing JavaScript
knowledge required to start coding
• It’s a direct response to node
What avatar is

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https://www.flickr.com/photos/45928872@N08/4211101808/

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www.techempower.com/benchmarks

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CONS
NASHORN

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http://ariya.ofilabs.com/2014/03/nashorn-the-new-rhino-on-the-block.html

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• Nashorn is much slower than Node
– But getting faster! (JDK8u20 & JDK8u40)
• JDK 8 only
– JDK 7: Rhino and dynJS
• May have issues with various frameworks
• Yet another level of abstraction
– With not so many examples
https://www.threadless.com/@alanis

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Can be tricky
• Types
– Collections
• Programming model
• Execution model
• Scopes & contextes
• Libraries
• Developers
by Yoel Ben-Avraham

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ITERATING
NASHORN :: DEMO

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REAL WORLD EXAMPLE
NASHORN

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My project
• Soft real time
• Controlling thousands of
devices
• Multithreaded
• „Distributed”

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I love your feedback! 
@michalgruca
michal.gruca@gmail.com
www.rits.pl