[[TracNav(MolgenisGuide)]]
= How to develop MOLGENIS on Eclipse/Helios =

We assume you installed:
* Java JDK >= 1.6
* MySQL or other supported database
* Tomact 6.0 or other supported web engine

== 1. Install eclipse helios ==
* Download from 
http://www.eclipse.org/downloads/packages/eclipse-ide-java-ee-developers/heliossr1
* Unzip to a directory of your choice
* Start it
  * Choose a sensible name for your workspace directory

== 2. install SVN plugin 'subversive' ==
Within Eclipse 
* go to help -> install new software
* Choose: Work with -> Helios - http://download.eclipse.org/releases/helios
* Tick box: Collaboration -> Subversive SVN team provider and
* Install

== 3. install freemarker plugin 'Freemarker IDE' ==
Within Eclipse:
* go to help -> install new software
* Choose: 'Add' and add new url http://download.jboss.org/jbosstools/updates/JBossTools-3.1.1.GA/
* Type in search box 'Freemarker'
* Choose: Freemarker IDE (not SDK)
* Install

== 4. checkout molgenis projects ==
Within Eclipse 
* go to Window->Open perspective->Other
* Choose: SVN Repository exploring
* Eclipse may ask you which SVN engine to use, choose SVN kit.
* Right-click on SVN repositories and add new repository
  * URL: http://www.molgenis.org/svn
* Browse to molgenis/3.3
  * right-click and choose 'check out'.
* Browse to molgenis_projects/<yourproject>
  * right-click and choose 'check out'.

In your workspace you now have two projects
* molgenis - has the generator
* your project - all software specific to your MOLGENIS instance.
== 5. Develop ==
From now on development is like on Galileo. 

== FAQ ==

=== Q1: how to add/manage J2EE dependencies ===
* In Eclipse Galileo there was a seperate entry for this in the project 'properties'.
* In Eclipse Helios this renamed to 'Deployment Assembly'. Here you can also choose other projects to be included.

=== Q2: I get 404 errors when starting the server ===
This may happen if Eclipse destroys your WebContent/WEB-INF/web.xml to default.

To solve this:
* right-click WebContent/WEB-INF/web.xml 
* update to SVN.
* delete your web server from the 'Servers' pane 
* run on server again.