Activiti + Vaadin:A match made in heavenFrederik HeremansSoftware engieer, AlfrescoPetter HolmströmSoftware architect, Vaadin

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BackgroundWhat’s this all about?

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Devoxx Registration

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Devoxx Registration• Most of you have used it• Consists of two parts:

–Registration application for visitors–Administration application for staff

• Vaadin UI• Activiti backend• Additional technologies:

–Hibernate for object persistence–JSR-303 for data validation–Spring to glue everything together

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So why are we here?• The architecture turned out to be very effective to

work with• The system was easy to fix

–Bugs could be fixed quickly after they were discovered• The system was easy to refactor

–New features could be added quickly• We want to show you some patterns and best

practices for working with Activiti and Vaadin

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But first...

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What is Activiti?

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What is Vaadin?

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Vaadin is a UI framework

for desktop-like web apps

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Vaadin is a UI framework

for desktop-like web apps

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New configs, taglibs and syntax!?!

JavaScript,DOM, Applet,plugins?

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New configs, taglibs and syntax!?!

JavaScript,DOM, Applet,plugins?

This is Java. Nothing else.

{No!

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Vaadin is like aset of LEGOs

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JavaEEJavaSE

JSP JSF JavaFX

Swing

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Vaadin

JavaEEJavaSE

JSP JSF JavaFX

Swing

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Architecture

DOM

Client Server

ViewHTML Pageover HttpResponse

Controller

Model

Parameters overHttpRequest

DB4

5

6

2

Term

inalAdapter

Term

inalAdapter

Automated bythe RIA framework

3

7

1

9

8

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Architecture

DOM

Client Server

ViewHTML Pageover HttpResponse

Controller

Model

Parameters overHttpRequest

DB4

5

6

2

Term

inalAdapter

Term

inalAdapter

Automated bythe RIA framework

3

7

1

9

8

Handled by the framework

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simple• forget the client-side • synchronous• server resources

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flexible• all Java tools and libraries• any JVM language

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flexible• all Java tools and libraries• any JVM language

Scala Groovylördag 12 november 11

secure• code stays in server• less web services

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What can you do with it?

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Web Applications!

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Let us tell you a story...

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The Company

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The Process

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... however, there is a problem!

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Expenses are skyrocketing!

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We need a change!

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Now let’s do it!

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Next Steps

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Getting the code

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Continuing with Activiti

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Getting Started with Vaadin• Visit our website www.vaadin.com• Read the Book of Vaadin• Visit our booth!

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Questions?

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