An Introduction to the Vert.x framework

OSCONAn Introduction to the

Vert.x framework

Wednesday, July 24, 13

Hi Folks! I’m Nate @zznate http://github.com/zznate


http://github.com/zznate

http://github.com/zznate

So what is Vert.x?


“...lightweight high-performance application platform for the JVM...”


“...for the JVM”


The JVM- mature concurrency model- very stable- heterogeneous


But most importantly...Polyglot support!


You can do a lot in 40 minutes...


http://vertx.io(scroll down)

To follow along, see: https://github.com/vert-x/vertx-examples


http://vertx.io

http://vertx.io

https://github.com/vert-x/vertx-examples

https://github.com/vert-x/vertx-examples

“Web apps”


http://web.tradekorea.com/upload_file/prod/emp/200806/main/result_2008_5_5_9_46_15_0_1.jpghttp://www.tradekorea.com/product-detail/P00016493/Used__Engine_Engines_auto_cars_spare_parts_car_part_motor_junkyard_korea_junkyards_Aircompressor_.html


http://web.tradekorea.com/upload_file/prod/emp/200806/main/result_2008_5_5_9_46_15_0_1.jpg

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




http://cache.boston.com/universal/site_graphics/blogs/bigpicture/shuttle_09_01/sts125_2.jpghttp://www.boston.com/bigpicture/2008/09/preparing_to_rescue_hubble.html


http://cache.boston.com/universal/site_graphics/blogs/bigpicture/shuttle_09_01/sts125_2.jpg

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

http://www.boston.com/bigpicture/2008/09/preparing_to_rescue_hubble.html

"We need to make configuration as easy as possible so expensive tools are not needed."


Said no enterpirse software company ever.


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




“New [Java | jvm-language] Framework!!”


http://geek-news.mtv.com//wp-content/uploads/geek/2012/11/picard-facepalm2.jpghttp://geek-news.mtv.com/2012/11/07/star-trek-wedding-proposal/


http://geek-news.mtv.com//wp-content/uploads/geek/2012/11/picard-facepalm2.jpg

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/

http://geek-news.mtv.com/2012/11/07/star-trek-wedding-proposal/

But Vert.x was different.


...for the JVM


Mature concurrency model- vert.x is based on the Reactor pattern

http://en.wikipedia.org/wiki/Reactor_pattern




Platform Stability- HTTP, HTTPS, TCP, SSL- clients and servers- All netty 4.0 based

http://netty.io/


http://netty.io/

http://netty.io/

Homogenous- file system API- data-driven event bus


Polyglot- Container modules- currently supports: JavaScript, Ruby, Python, Groovy, Scala,


Scalability Modularity Developer-focused


Scalability


Event Bus- simple, distributed peer-to-peer - pub/sub or point-to-point- local or distributed**- ‘data only’ with limited number of types


Event Bus... but it’s a good idea to use JSON!

(completely language agnostic - we are building services and decoupling!)


“local or distributed”

BONUS: EventBus can extend directly to the browser

http://vertx.io/core_manual_java.html#sockjs-eventbus-bridge




Modularity


{ address : "com.bloidonia.jdbcpersistor" driver : "org.hsqldb.jdbcDriver", url : "jdbc:hsqldb:mem:test", username : "someuser", password : "somepass",}


Module Benefits- encapsulation- distributability- dynamic- structured


Encapsulation- classpath and dependency- classloader isolation(but multiple instances of the module will share classloaders)


Distributabilitypushed to/loaded from:- file system (contained or shared)- maven central- bintray

http://vertx.io/mods_manual.html#how-vertx-locates-modules




Dynamic- automatically downloaded and installed- loaded/unloaded at runtime


Structured- minimalistic descriptor syntax- sub-modules (can be thought of as "this module 'deploys' these modules" directive)


Running a module and providing it’s configuration


Modules and Concurency- Worker (blocking)- Event loop (non-blocking)


Worker Modules- single or multi-threaded- useful for legacy APIs(ex. JDBC)


Event Loop Modules- control number of instances- instance per core is ideal


Modules (best for last...)


Dog food-ing FTW:Language runtimes are all module based


Developer friendly


Polyglot (cont’d)


JavaScript- Rhino - DynJS: invokeDynamic based implementation

http://dynjs.org/https://github.com/vert-x/mod-lang-dynjs


http://dynjs.org/

http://dynjs.org/

https://github.com/vert-x/mod-lang-dynjs

https://github.com/vert-x/mod-lang-dynjs

Simple Programming Model- just don’t block the event loop!- reactor pattern- worker delegates

http://en.wikipedia.org/wiki/Reactor_patternhttp://vertx.io/core_manual_java.html#writing-verticles




http://vertx.io/core_manual_java.html#writing-verticles

http://vertx.io/core_manual_java.html#writing-verticles

Provides most common services- HTTP/HTTPS- TCP/SSL- SockJS- File system access (includes sendfile() wrappers)


Build It: Maven- archetype integration- plug-in for launching/running

http://vertx.io/maven_dev.html




Build It: Gradle- template project to clone

http://vertx.io/gradle_dev.html




Test It!- JUnit integration utilities- Container and IDE integration(IntelliJ and Eclipse)


Summary- General purpose application platform- Polyglot development- Asynchronous APIs


Vert.x:Simple. Not Simplistic.


Questions?


An Introduction to the Vert.x framework

Technology

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