Run a Google Web Toolkit 2 project on Apache Karaf/ServiceMix

Follow @cmoulliard To simplify the development of Web projects on Apache Karaf/Apache ServiceMix, we have created archetypes to setup WAR or WAB projects. They are very basic but they can be enriched with framework like Struts 2, Wicket, plain JSP or MyFaces JSF as they are currently supported on Apache Karaf - ServiceMix.

For the GWT users, it exists now an archetype which will create a GWT 2.4 project. To create such a project, you must generate a project from the archetype

mvn archetype:generate \
   -DarchetypeGroupId=org.ops4j.pax.web.archetypes\
   -DarchetypeArtifactId=wab-gwt-archetype \
   -DarchetypeVersion=2.1.2 \
   -DgroupId=com.mycompany \
   -DartifactId=hello \
   -Dversion=1.0

build next the WAB using hello/mvn clean install

and deploy it on Apache Karaf

Verify that the web site is well registered :

Next, you can navigate to your application in your browser and click on the button to say Hello.

Remark : A WAB project is nothing more than a WAR excepted it is packaged as a bundle file, that we have removed the WEB-INF/lib dependencies and create a MANIFEST file containing the OSGI instructions.

Trick to customize war deployment on ServiceMix4 using PAX

Follow @cmoulliard Here is another very interesting trick that you can use to customize the war the deployment process on ServiceMix.

customize = in this context, this word means How can I add property or extend existing of a MANIFEST file

e.g. : The WAR to be deployed contains tlb files created under the folder WEB-INF/tags/form and WEB-INF/tags/jms. By default PAX will create a MANIFEST file containing the property Bundle-Classpath with :

• WEB-INF/classes
• all jars from WEB-INF/lib directory

but will not take care about your folders

Two possibilities are available to tell to PAX that it must include in the Bundle-Classpath your folders

1) Command + uri

This one consists in to pass the parameters as an uri like this :

install war:file:///d:/temp/activemq-web-console-5.2.0.war?Bundle-Classpath= ., WEB-INF/tags/form, WEB-INF/tags/jms&Webapp-Context= activemqweb

2) Create a file.bnd + command

Another interesting option is to provide as a file the location of the WAR and the properties that you want to add

• Create a file called xxxx.bnd
• Add in the file the following lines :

WAR-URL=file:///c/temp/activemq-web-console-5.2.0.war
Bundle-Classpath=., WEB-INF/tags/form, WEB-INF/tags/jms
Webapp-Context=activemqweb

• use in your favorite OSGI server (ServiceMix) the following command to install the WAR :

install war-i:file:///c:/temp/activemq-web-console-5.2.0.bnd