Vert.x is a new JVM based application framework with an event driven, asynchronous programming model. With APIs available in Java, JavaScript, Ruby, Python and Groovy, developers are given complete freedom to implement their application in the language of their choice. Starting with the core Vert.x concepts, this presentation will walk attendees through the components of a simple vert.x based application. Through this process, attendees will gain an understanding of how Vert.x: - provides for a way to use several different languages in the same application - takes advantage of JVMs excellent multi-core capabilities - uses a module-based framework for packaging and hot-deployment - communicates with other processes via a distributed event bus - exposes an asynchronous programming model with very simple concurrency With this presentation, viewers should gain a deep-enough understanding of Vert.x to be able to evaluate the platform for their own projects.

1. OSCON
An Introduction to the
Vert.x framework
Wednesday, July 24, 13

2. Hi Folks! I’m Nate
@zznate
http://github.com/zznate
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3. So what is Vert.x?
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4. “...lightweight high-
performance
application platform for
the JVM...”
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5. “...for the JVM”
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6. The JVM
- mature concurrency model
- very stable
- heterogeneous
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7. But most importantly...
Polyglot support!
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8. You can do a lot in 40
minutes...
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9. http://vertx.io
(scroll down)
To follow along, see:
https://github.com/vert-x/vertx-examples
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10. “Web apps”
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11. Wednesday, July 24, 13

12. Wednesday, July 24, 13

13. http://web.tradekorea.com/upload_file/prod/emp/200806/main/result_2008_5_5_9_46_15_0_1.jpg
http://www.tradekorea.com/product-detail/P00016493/
Used__Engine_Engines_auto_cars_spare_parts_car_part_motor_junkyard_korea_junkyards_Aircompressor_.html
Wednesday, July 24, 13

14. http://cache.boston.com/universal/site_graphics/blogs/bigpicture/shuttle_09_01/sts125_2.jpg
http://www.boston.com/bigpicture/2008/09/preparing_to_rescue_hubble.html
Wednesday, July 24, 13

15. "We need to make
configuration as easy as
possible so expensive
tools are not needed."
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16. Said no enterpirse
software company ever.
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17. JDBC Module Config:
{
address : "com.bloidonia.jdbcpersistor"
driver : "org.hsqldb.jdbcDriver",
url : "jdbc:hsqldb:mem:test",
username : "someuser",
password : "somepass",
}
https://github.com/timyates/mod-jdbc-persistor
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18. “New
[Java | jvm-language]
Framework!!”
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19. http://geek-news.mtv.com//wp-content/uploads/geek/2012/11/picard-facepalm2.jpg
http://geek-news.mtv.com/2012/11/07/star-trek-wedding-proposal/
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20. But Vert.x was different.
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21. ...for the JVM
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22. Mature concurrency
model
- vert.x is based on the
Reactor pattern
http://en.wikipedia.org/wiki/Reactor_pattern
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23. Platform Stability
- HTTP, HTTPS, TCP, SSL
- clients and servers
- All netty 4.0 based
http://netty.io/
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24. Homogenous
- file system API
- data-driven event bus
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25. Polyglot
- Container modules
- currently supports:
JavaScript, Ruby, Python,
Groovy, Scala,
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26. Scalability
Modularity
Developer-focused
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27. Scalability
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28. Event Bus
- simple, distributed peer-to-
peer
- pub/sub or point-to-point
- local or distributed**
- ‘data only’ with limited
number of types
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29. Event Bus
... but it’s a good idea to use
JSON!
(completely language
agnostic - we are building
services and decoupling!)
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30. “local or distributed”
BONUS:
EventBus can extend directly
to the browser
http://vertx.io/core_manual_java.html#sockjs-eventbus-bridge
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31. Modularity
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32. {
address : "com.bloidonia.jdbcpersistor"
driver : "org.hsqldb.jdbcDriver",
url : "jdbc:hsqldb:mem:test",
username : "someuser",
password : "somepass",
}
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33. Module Benefits
- encapsulation
- distributability
- dynamic
- structured
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34. Encapsulation
- classpath and dependency
- classloader isolation
(but multiple instances of the
module will share
classloaders)
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35. Distributability
pushed to/loaded from:
- file system
(contained or shared)
- maven central
- bintray
http://vertx.io/mods_manual.html#how-vertx-locates-modules
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36. Dynamic
- automatically downloaded
and installed
- loaded/unloaded at runtime
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37. Structured
- minimalistic descriptor
syntax
- sub-modules
(can be thought of as "this module
'deploys' these modules" directive)
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38. Running a module and providing it’s
configuration
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39. Modules and Concurency
- Worker (blocking)
- Event loop (non-blocking)
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40. Worker Modules
- single or multi-threaded
- useful for legacy APIs
(ex. JDBC)
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41. Event Loop Modules
- control number of instances
- instance per core is ideal
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42. Modules (best for last...)
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43. Dog food-ing FTW:
Language runtimes are all
module based
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44. Developer friendly
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45. Polyglot (cont’d)
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46. JavaScript
- Rhino
- DynJS: invokeDynamic
based implementation
http://dynjs.org/
https://github.com/vert-x/mod-lang-dynjs
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47. Simple Programming Model
- just don’t block the event loop!
- reactor pattern
- worker delegates
http://en.wikipedia.org/wiki/Reactor_pattern
http://vertx.io/core_manual_java.html#writing-verticles
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48. Provides most common
services
- HTTP/HTTPS
- TCP/SSL
- SockJS
- File system access
(includes sendfile() wrappers)
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49. Build It: Maven
- archetype integration
- plug-in for launching/running
http://vertx.io/maven_dev.html
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50. Build It: Gradle
- template project to clone
http://vertx.io/gradle_dev.html
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51. Test It!
- JUnit integration utilities
- Container and IDE integration
(IntelliJ and Eclipse)
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52. Summary
- General purpose application
platform
- Polyglot development
- Asynchronous APIs
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53. Vert.x:
Simple. Not Simplistic.
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54. Questions?
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