Search code examples
mavenosgibndmaven-bundle-plugin

How to form the .bnd files while using maven-bundle-plugin?

I'd like to build osgi components and I have been told to use maven-bundle-plugin. I started off by adding this into my pom.xml:

        <plugin>
                <groupId>org.apache.felix</groupId>
                <artifactId>maven-bundle-plugin</artifactId>
                <version>3.0.0</version>
                <extensions>true</extensions>
                <configuration>
                    <obrRepository>NONE</obrRepository>
                    <instructions>
                        <_include>-bnd.bnd</_include>
                    </instructions>
                </configuration>
        </plugin>

Notice the .bnd file which is passed to <_include> tag. I've heard people saying that these files should be kept at minimum, or even empty, and then should be observed what imports/exports are needed, etc. This is where I get confused. I have my MANIFEST.MF file, in which I know what to import and export. However, I need a bit of help to make my .bnd files working. Right now I am trying with empty .bnd files and I am not sure if it is working as it should be.

Does anyone have any experience with this plugin and the way I want to make it work?

For instance, here is a sample .bnd file. However I don't know how he decided that these should imports/exports be there.

As of now, when I try to test the .jar I get

no main manifest attribute, in bundle-1.0.0.jar

error despite of the fact that there is indeed MANIFEST.MF in the .jar.

Update: I thought I could share the MANIFEST.MF that I had previously, which I want to generate via this plugin now.

Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Just a Name
Bundle-SymbolicName: just.a.name.broker;singleton:=true
Bundle-Version: 1.0.0
Require-Bundle: org.apache.activemq,
 just.msg
Bundle-Activator: just.a.broker.Activator
Bundle-ActivationPolicy: lazy
Bundle-RequiredExecutionEnvironment: JavaSE-1.7
Import-Package: javax.naming,
 javax.xml,
 javax.xml.parsers,
 org.apache.log4j.xml,
 org.osgi.framework
Bundle-ClassPath: .
Export-Package: just.a.broker

So in order to have such a manifest, how should my .bnd file look like? Or is it better to include the properties in the plugin rather than passing the .bnd file?

Solution

  • your .bnd file may be look like this:

    Bundle-Activator: just.a.broker.Activator
Bundle-ActivationPolicy: lazy
Bundle-RequiredExecutionEnvironment: JavaSE-1.7
Require-Bundle: org.apache.activemq,\
  just.msg 

Import-Package: *,\
  javax.naming,\
  javax.xml,\
  javax.xml.parsers,\
  org.apache.log4j.xml,\
  org.osgi.framework

Bundle-ClassPath: .
Export-Package: just.a.broker

    hope this helps.