Nashorn is a JavaScript runtime built on top of Java that is compatible with ECMAScript 5.1 and allows for modular development and full interoperability with the JVM. Project Avatar utilizes the Nashorn engine to create a JavaScript service layer that reduces the need for extensive JavaScript knowledge. While Nashorn is improving in speed compared to Node.js, it has some limitations, including slower performance and potential issues with certain frameworks.

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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 & JDKu40)
• 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