Add an example of a Jersey OSGi bundle for Jetty 12 (ee8)

[gpfeifer]

A very minimalistic example of a Jersey OSGi Bundle which can be deployed in an OSGi container with Jetty 12 (ee8).

[jansupol]

Please sign ECA. See here.

[jansupol]

@gpfeifer I can see the ECA has been signed, but for some reason, the Eclipse ECA validation tool validates against gpfeifer@d*c DOT com, ie not against the signed-off-by address. I'll try to bug Eclipse about it.

[jansupol]

@gpfeifer It has the Author header different from the email the ECA is signed with. Can you please update the Author header in the commit?

[gpfeifer]

Changed the author (hopefully)

[jansupol]

@gpfeifer Yes, that did the trick, thank you.

[jansupol]

@gpfeifer What is it exactly that makes the app running on Jetty 12? Is it just the lines

                   <Jetty-Environment>ee8</Jetty-Environment>
                   <_wab>src/main/webapp</_wab>

Or is there something more?

[gpfeifer]

Two things makes the app running on Jetty 12:

Manifest.mf

In addition to the other entries there must be:

Jetty-Environment=ee8

web.xml

The Jersey ServletContainer must be initialized with a Jersey ResourceConfig. Jersey Application should also work, but I didn't tested this

<servlet>
    <servlet-name>Jersey Web Application</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>javax.ws.rs.Application</param-name>
        <param-value>org.glassfish.jersey.examples.osgi.helloworld.HelloResourceConfig</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>