code.talks 2015 hosted by ABOUT YOU

1. Simplicity meets Scalability
(JavaScript on Java Servers)
Ing. Rolando Santamaría Masó
Software Architect at Innotrade GmbH
Herzogenrath, Germany
Code.Talks Conference 2015
September 29, 2015
Dammtordamm 1, 20354 Hamburg

2. Who am I?
Rolando Santamaría Masó - Simplicity meets Scalability (JavaScript on Java Servers) - 2
• Software developer and architect
• Started in the PHP world ;)
• jWebSocket framework core team from 2010
• Java, JavaScript
• HTTP - WebSockets
• High performance I/O
• APIs
• Informatic Sciences Engineer (UCI, Cuba)
• Software Architect at Innotrade GmbH from 2014

3. Today's session
• Agenda:
• Java and JavaScript in 2015.
• High Performance Clusters with jWebSocket.
• Creating JavaScript applications with jWebSocket (Scripting
plug-in):
- General concepts.
- Getting started.
- The notebook app demo.
• Questions and suggestions.
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4. Java and JavaScript in 2015
Java on TIOBE Index
http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html (September 2015)
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5. Java and JavaScript in 2015
Java on TIOBE Index
http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html (September 2015)
Ebay, Amazon, Google, Netflix, Linkedin
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6. Java and JavaScript in 2015 (Nashorn)
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7. Java and JavaScript in 2015 (Nashorn)
Must used JavaScript engines for the JVM
(JSR-223):
Rhino Nashorn
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8. Java and JavaScript in 2015 (Nashorn)
Nashorn: The New Rhino on the Block
http://ariya.ofilabs.com/2014/03/nashorn-the-new-rhino-on-the-block.html
Performance comparison between Rhino, Nashorn and Google V8 engines:
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9. Java and JavaScript in 2015 (Nashorn)
Inside Vert.x. Comparison with Node.js
http://www.cubrid.org/blog/dev-platform/inside-vertx-comparison-with-nodejs/
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10. Java and JavaScript in 2015 (Nashorn)
Inside Vert.x. Comparison with Node.js
http://www.cubrid.org/blog/dev-platform/inside-vertx-comparison-with-nodejs/
Here the bigger is better ;)
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11. Java and JavaScript in 2015 (Nashorn)
Nashorn: The New Rhino on the Block
http://ariya.ofilabs.com/2014/03/nashorn-the-new-rhino-on-the-block.html
Performance comparison between Rhino, Nashorn and Google V8 engines:
Nashorn provides the fastest
JavaScript RTE for the JVM.
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12. Java and JavaScript in 2015 (Nashorn)
JSR-223 (Nashorn: ECMA-262 and ECMAScript 5.1)
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("JavaScript");
File f = new File("test.txt");
engine.put("file", f);
engine.eval("print(file.getAbsolutePath())");
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13. High Performance Clusters with jWebSocket
The highly scalable real-time web applications
development framework.
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14. High Performance Clusters with jWebSocket
• Why app clusters are required?
• Scalability
• High Availability
• High Performance
• System load is distributed, parallelized when possible.
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15. High Performance Clusters with jWebSocket
• Why app clusters are required?
• Scalability
• High Availability
• High Performance
• System load is distributed, parallelized when possible.
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Critical enterprise apps require
clusters.

16. High Performance Clusters with jWebSocket
• The jWebSocket approach for WebSocket clients
wss://
Nginx
instances
as
load balancer
ActiveMQ
cluster
as
message broker
ws://
https://
http://
Nginx
instances
as
web server
MongoDB
cluster
as
shared data
tcp://
jWebSocket
instances
as
application nodes
tcp://tcp://
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17. High Performance Clusters with jWebSocket
• The jWebSocket approach for WebSocket clients
wss://
Nginx
instances
as
load balancer
ActiveMQ
cluster
as
message broker
ws://
https://
http://
Nginx
instances
as
web server
MongoDB
cluster
as
shared data
tcp://
jWebSocket
instances
as
application nodes
tcp://tcp://
jWebSocket apps can scale up
to millions of clients.
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18. High Performance Clusters with jWebSocket
plus
JavaScript
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19. Creating JavaScript applications with jWebSocket Scripting plug-in
General concepts:
• Script apps stands on the jWebSocket communication
backbone.
• Per app security sandbox (intended for multi-tenant purposes).
• Automatic client-side App object generation (optional).
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20. Creating JavaScript applications with jWebSocket Scripting plug-in
General concepts:
• JavaScript apps (09/2015).
• Hot deploys and code reloads.
• NPM optional support (modules require to be Nashorn compliant).
• High level API.
• EventBus integration.
• Built-in annotations: type, not_null, max_length, min_length, min_value,
max_value, default_value, regex, authenticated, authority, async.
• Custom annotation processors.
• Custom arguments validation.
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21. Creating JavaScript applications with jWebSocket Scripting plug-in
Live Demo:
•Create new app from the console.
•Add basic collection CRUD.
•Show HOT reload in action.
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22. Creating JavaScript applications with jWebSocket Scripting plug-in
Live Demo:
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23. Questions and Suggestions
Questions and Suggestions?
• My contact: rsantamaria@jwebsocket.org
@kyberneees on twitter
• Website: http://jwebsocket.org
• More: http://jwebsocket.org/documentation/Plug-Ins/
Scripting-Plug-In/Developer-Guide
Open-Source
support@jwebsocket.org
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