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This plugin for Maven 2 is based on the BND tool from Peter Kriens. The way BND works is by treating your project as a big collection of classes (e.g., project code, dependencies, and the class path). The way you create a bundle with BND is to tell it the content of the bundle's JAR file as a subset of the available classes. This plugin wraps BND to make it work specifically with the Maven 2 project structure and to provide it with reasonable default behavior for Maven 2 projects.

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Since the 1.4.0 release, this plugin also aims to automate OBR (OSGi Bundle Repository) management. It helps manage a local OBR for your local Maven repository, and also supports remote OBRs for bundle distribution. The plug-in automatically computes bundle capabilities and requirements, using a combination of Bindex and Maven metadata.

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<plugin>
  <groupId>org.apache.felix</groupId>
  <artifactId>maven-bundle-plugin</artifactId>
  <executions>
    <execution>
      <id>bundle-manifest</id>
      <phase>process-classes</phase>
      <goals>
        <goal>manifest</goal>
      </goals>
    </execution>
  </executions>
  <configuration>
    <supportedProjectTypes>
      <supportedProjectType>jar</supportedProjectType>
      <supportedProjectType>bundle</supportedProjectType>
      <supportedProjectType>war</supportedProjectType>
    </supportedProjectTypes>
    <instructions>
      <!-- ...etc... -->
    </instructions>
  </configuration>
</plugin>

Building the Plugin

The plugin is hosted at the Apache Felix project. The following steps describe how to build and install the plugin into your local Maven2 repository.

Using the SVN client of your choice, checkout the maven-bundle-plugin project.

You'll also need to configure the other plugin to pick up and use the generated manifest, which is written to ${project.build.outputDirectory}/META-INF/MANIFEST.MF by default (unless you choose a different manifestLocation in the maven-bundle-plugin configuration). Continuing with our WAR example:

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-war-plugin</artifactId>
  <configuration>
    <archive>
      <manifestFile>${project.build.outputDirectory}/META-INF/MANIFEST.MF</manifestFile>
    </archive>
  </configuration>
</plugin>

Building the Plugin

The plugin is hosted at the Apache Felix project. The following steps describe how to build and install the plugin into your local Maven2 repository.

Using the SVN client of your choice, checkout the maven-bundle-plugin project.

$ svn co http://svn.apache.org/repos/asf/felix/trunk/bundleplugin

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Sometimes you would like to clean your local OBR because it contains bundles that are no longer in your local Maven repository. This case often occurs when artifacts were deleted manually. The maven-bundle-plugin provides a simple goal to check for missing bundles, and remove them from the local OBR., and remove them from the local OBR.

configuration:

• obrRepository path to local OBR, defaults to <local-maven-repository>/repository.xml

Example:

mvn bundle:clean

bundle:index

The index goal allows the creation of an OBR repository based on a set of jars in a maven repository.

Configurationconfiguration:

• obrRepository path to local OBR, defaults to <local-maven-repository>/repository.xml

Example:

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• urlTemplate template for generating urls for OBR resources
• mavenRepository path to the maven repository, defaults to <local-maven-repository>

Possible values for the urlTemplate are:

• maven this will create a maven based url such as mvn:groupid/artifactid/version
• pattern with the following placeholders:
  • %v bundle version
  • %s bundle symbolic name
  • %f file name
  • %p file path

Concurrent updates

With a remote OBR, several uploads may occur at the same time. However, the remote OBR is centralized in one file, so concurrent modification must be avoided. To achieve this, the plug-in implements a locking system. Each time the plug-in tries to modify the file it sets a file based lock. If it can't take the lock, it will wait and retry. After 3 attempts the upload process fails. To bypass this lock add -DignoreLock to the command-line (or add <ignoreLock>true<ignoreLock> to the configuration section of your Pom).

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