Building with Maven in JDeveloper 11gR2

With JDeveloper 11gR2 you can use Maven 2 as your build engine, before 11gR2 you could download a plugin which did not work great because all the required Oracle libraries which were not available in a public repository. So you had no choice to add them manually to a Maven Repository before you can use Maven. With 11gR2 Oracle fixed that by adding your projects libraries to the local Maven Repository when you add a Pom.xml to your projects.

Using Maven in JDeveloper is not that simple and I hope that this blogpost can help you to use maven as your buidtool.

First check if you have in your user profile a folder called .m2 . This folder must contain a settings.xml file ( you can copy it from jdeveloper\apache-maven-2.2.1\conf ) And also add a sub folder called repository.

Select for example your model project and add a Maven POM for Project to this project

You will get a POM overview which matches with your project.

This will add the libraries of the model project to your local Maven repository.

Now you can do the same for the ViewController project.

The only thing missing is the application workspace POM.xml which build all workspace projects. Add the Application POM to your workspace.

Don't enable Generate POM for Projects in this Application because we already did that.

This Application POM is located in the Application Resources window and only contains the Model and ViewController references,

In the project options or when you select the POM.xml you can change the Maven settings

Add some extra Maven goals to your project.

or add some extra Maven Repositories, like your company one.

Too bad indexing the Maven repositories ends in a error. Even when I use my own repository. You can ignore this error.

This is fixed in the 11gR2 patch and now it is working fine.

Now its time to build your project by running the Maven Package Goal.

The Model project was no problem.

The ViewControler project was different.

First I got a Apacle Trinidad error ( the ADF Faces Runtime needs a Trinidad pom )
Cannot find parent: org.apache.myfaces.trinidad:trinidad for project: null:trinidad-api:jar:null for project null:trinidad-api:jar:null

You can try to add and remove the right dependency  ( oracle.jdeveloper.library:ADF-Faces-Runtime-11:pom:11.1.2.0.0 ), maybe this will fix it.

This is fixed in the 11gR2 patch and now it is working fine.

In the Maven setting you can Add or Remove the library dependency.

You will get a message that the local repository will be updated.

In case of the Apache Trinidad error. I need to update the trinidad pom in my local repository and remove the  missing parent and move the groupId and version element,

This is fixed in the 11gR2 patch and now it is working fine.
<!--
  <parent>
    <groupId>org.apache.myfaces.trinidad</groupId>
    <artifactId>trinidad</artifactId>
    <version>2.0.0.1-SNAPSHOT</version>
  </parent>
-->
  <groupId>org.apache.myfaces.trinidad</groupId>
  <version>2.0.0.1-SNAPSHOT</version>
  <artifactId>trinidad-impl</artifactId>
  <packaging>jar</packaging>

and so it goes on and on. Also need to do this for the 2 RichClient Faces POMs located in .m2\repository\oracle\adf\view\faces
Somehow the parent POM of the Oracle and Apache POMs are not added to  the local repository.

And it would be great if Oracle made a option to force the synchronization of all the Jdeveloper libraries ( disc  space is not a problem anymore and make it complete )  and even a option to export these POMs to your own Maven Repository.

The ViewController project has a dependecy with the model project so you need to make sure that the ViewController project can find the Model jar. To do so I will add my own Maven Repository to all the projects.

Change the Settings.xml of Apache Maven or of your local Maven repository and the add the username password which can upload the model artifact.

In the Model POM add a Distribution so Maven can upload the model artifact.

The ViewController can now find the Model dependency and you can create the WAR. This is a big one (130) because it adds all the reference jar to the web-inf/lib. You need to control this by deselecting the export option in the Maven project dependency.

To solve the Apache Trinidad dependency you need to add the Apache repository on the ViewController maven repositories. Add https://repository.apache.org/content/repositories/snapshots/ as url
Open the ADF-Faces-Runtime-11-11.1.2.0.0.pom located in .m2\repository\oracle\jdeveloper\library\ADF-Faces-Runtime-11\11.1.2.0.0\ and change the Trinidad dependency from 2.0.0.1-SNAPSHOT to 2.0.0.3-SNAPSHOT
The 2.0.0.1-SNAPSHOT does not exists in the Apache repository anymore.

This is fixed in the 11gR2 patch and now it is working fine.

Do the same for Trinidad-Runtime-11-11.1.2.0.0.pom  located at .m2\repository\oracle\jdeveloper\library\Trinidad-Runtime-11\11.1.2.0.0

This is fixed in the 11gR2 patch and now it is working fine.

Also got a Maven Package Goal error when I run this Package Goal twice. It is solved when I do a clean first.
Cannot construct org.apache.maven.plugin.war.util.WebappStructure as it does not have a no-args constructor

message             : Cannot construct org.apache.maven.plugin.war.util.WebappStructure as it does not have a no-args constructor
cause-exception     : com.thoughtworks.xstream.converters.reflection.ObjectAccessException
cause-message       : Cannot construct org.apache.maven.plugin.war.util.WebappStructure as it does not have a no-args constructor
class               : org.apache.maven.plugin.war.util.WebappStructure
required-type       : org.apache.maven.plugin.war.util.WebappStructure
path                : /webapp-structure
line number         : 1