Presentation Creating Polyglot and Scalable Applications on the JVM with Vert.x

The JVM has become the runtime for a lot of different languages. Nowadays developers program in more than one language. Of course java is still used the most on the JVM, but other languages are winning terrain. The next step for developers is to create polyglot applications, taking the best out of each language, such as JavaScript, Groovy, Ruby and Java. Vert.x is a framework that runs on the JVM. Vert.x enables developers to create polyglot applications that run on the JVM. That is not the only thing Vert.x brings. It also has been built to be scalable and it has a very simple approach for concurrency that can be compared to the Node.js method. Another important feature of Vert.x is the distributed event bus that is also available from the clients. Using this technology you can receive events in the browser that are generated by the server and vice versa. During this presentation you’ll get introduced in the possibilities of this new framework called Vert.x. I’ll explain the foundat
Published on: 2012-11-30T09:14:31.000Z
Channel: NLJUG (all)
Tags: Polyglot Vert.x jvm
Speakers:

Jettro Coenradie

I am a regular visitor and speaker at the different NLJug events. I am doing Java for more than a decade and I am constantly seeking for tools and frameworks to make my life as a software developer easier. Currently I am working for Orange11 as a Software Architect. I am an integration specialist, but I have knowledge in large variety of topics like content management, CQRS and mobile. At the moment I am involved with technologies like Hippocms, Axonframework, MongoDB, Spring integration, Twitter Bootstrap and on the lookout for other interesting projects like Vert.x.

PDF: slides.pdf

Slides:

Creating Polyglot and Scalable Applications on the JVM with Vert.x

Creating Polyglot and Scalable Applications on the JVM with Vert.x Jettro Coenradie @gridshore

http://maps.google.com

Polyglot applications

Polyglot applications http://maps.google.com

JDBC, Reflection JIT Compiler, Collections framework Hotspot JVM, JNDI Reg Exp, NIO, XML parsing Generics, Varargs, enums Scripting Language Support Dynamic languages on JVM

JDBC, Reflection JIT Compiler, Collections framework Hotspot JVM, JNDI Reg Exp, NIO, XML parsing Generics, Varargs, enums Scripting Language Support Dynamic languages on JVM 1 1.1 1.2 1.3 1.4 1996 1997 1998 2000 2002 5 2004 6 2006 7 2011

Polyglot applications on the JVM

C10K Problem

C10K Problem http://www.tumblr.com/tagged/rockconcert?before=1346635427

http://en.wikipedia.org/wiki/C10k_problem

Scalable applications on the JVM

Vert.x

Vert.x Netty JRuby Groovy Rhino Jython Hazelcast @timfox

Polyglot application platform JavaScript

Scalable: Blocking to non-blocking

Easily Concurrent

Vert.x Components

Vert.x Components Event Loop 1 Background Pool Verticle Verticle Worker Worker Core Services Event Bus Module Module Module Event Loop 2

Vert.x Core

Vert.x Core · Must be implemented by all languages · Core services must be called direct · Example Services · TCP/SSL, HTTP/HTTPS, WebSockets, Logging, SockJS and more Event Loop 1 Background Pool Verticle Verticle Worker Worker Core Services Event Bus Module Module Module Event Loop 2

Verticle

Verticle · Unit of deployment in Vert.x · Can contain other scripts · Can contain libraries · Can start other verticles Event Loop 1 Background Pool Verticle Verticle Worker Worker Core Services Event Bus Module Module Module Event Loop 2

Module

Module · Modules communicate using messages · A public module repository · https://github.com/vert-x/vertx-mods/ tree/gh-pages/mods Module Event Loop 1 Background Pool Verticle Verticle Worker Worker Core Services Event Bus Module Module Event Loop 2

Worker Verticle

Worker Verticle · For tasks that require blocking · For tasks that take a lot of computation · Uses thread of the background pool · They are never executed by more than one thread Event Loop 1 Background Pool Verticle Verticle Worker Worker Core Services Event Bus Module Module Module Event Loop 2

Verticle or Module

Verticle or Module · Verticle is easy to use · Verticle needs to be configured with its classpath when running · A module is a package of vert.x stuff complete with dependencies. Module Event Loop 1 Background Pool Verticle Verticle Worker Worker Core Services Event Bus Module Module Event Loop 2

Communicating between modules

Communicating between modules · Send messages over the Event bus · Vert.x will automatically convert messages between modules Java Groovy Ruby JavaScript Python JsonObject Map Hash Object Hash

Threads Event loop

Threads Event loop · Amount equals number of cores · Verticles/modules are assigned to an event loop Background Pool · A thread pool for worker verticles · Actions can block or take longer CPU time

Demo: Office events

Demo: Office events Event Loop 1 Background Pool Backup App Core Services Event Bus Invitations Website Notifications Mongo Persistor Event Loop 1 Event Loop 2 https://github.com/jettro/vertx-samples/tree/master/office-events

Demo

Demo: Office events

Demo

Module layout

Module layout · Module naming: prefix.-v · mod.json · scripts or classes · lib/ - libraries required by the module

Configuration

Configuration · Pass configuration when deploying a verticle or module · Use a json object · json is used according the language as discussed before

Events

Events · Publish/Subscribe · Peer-to-Peer · Replying to messages · Distributed event-bus

Logging

Logging · Default uses java utils logging · Use other logging framework: log4j for example · /bin/vertx · DEFAULT_JVM_OPTS="-Dorg.vertx.logger-delegate-factory-classname=org.vertx.java.core.logging.impl.Log4jLogDelegateFactory" · Add the library to the vertx lib folder · Create a log4j.properties file

There is more

There is more · Shared data · Embedded mode · Clustered mode

More info Vert.x Tim Fox

More info Vert.x Tim Fox @timfox http://vertx.io Downloads and documentation http://groups.google.com/group/vertx https://github.com/jettro/vertxsamples/ office-events Jettro Coenradie @jettroCoenradie @gridshore http://www.linkedin.com/in/jettro http://www.gridshore.nl http://www.trifork.nl https://github.com/jettro/

Questions ??

Questions ?? Rock ?? Concert by Rod Stewart with 3.500.000 visitors