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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.

NOTE: test scoped NOTE: only compile, runtime and system scoped dependencies are passed to BND. Provided and test dependencies are not included in the classpath seen by BND.

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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• <Bundle-SymbolicName> is computed using the shared Maven2OsgiConverter component, which uses the following algorithm:
  Get the symbolic name as groupId + "." + artifactId, with the following exceptions:
  • if artifact.getFile is not null and the jar contains a OSGi Manifest with Bundle-SymbolicName property then that value is returned
  • if groupId has only one section (no dots) and artifact.getFile is not null then the first package name with classes is returned. eg. commons-logging:commons-logging -> org.apache.commons.logging
  • if artifactId is equal to last section of groupId then groupId is returned. eg. org.apache.maven:maven -> org.apache.maven
  • if artifactId starts with last section of groupId that portion is removed. eg. org.apache.maven:maven-core -> org.apache.maven.core
    
• <Export-Package> is assumed to be "<Bundle-SymbolicName>.*", unless <Private-Package> is specified, then <Export-Package> is assumed to be empty.
• <Private-Package> is assumed to be empty by default.
• <Import-Package> is assumed to be "*", which imports everything referred to by the bundle content, but not contained in the bundle.
• <Include-Resource> is generated from the project's Maven resources, typically "src/main/resources/", which will copy the specified project directory hierarchy into the resulting bundle JAR file, mirroring standard Maven behavior.
• <Bundle-Version> is assumed to be "${pom.version}" with '-' character separator of the qualifier replaced with a '.' character.
• <Bundle-Name> is assumed to be "${pom.name}".
• <Bundle-Description> is assumed to be "${pom.description}".
• <Bundle-License> is assumed to be "${pom.licenses}".
• <Bundle-Vendor> is assumed to be "${pom.organization.name}".
• • The computed symbolic name is also stored in the $(maven-symbolicname) property in case you want to add attributes or directives to it.
• <Export-Package> is now assumed to be the set of packages in your local Java sources, excluding the default package '.' and any packages containing 'impl' or 'internal'.
  (before version 2 of the bundleplugin it was based on the symbolic name)
• Since 2.2.0 you can also use {local-packages} inside <Export-Package> and it will be expanded to the set of local packages.
• <Private-Package> is now assumed to be the set of packages in your local Java sources (note that any packages in both <Export-Package> and <Private-Package> will be exported).
  (before version 2 of the bundleplugin it was assumed to be empty by default)
• <Import-Package> is assumed to be "*", which imports everything referred to by the bundle content, but not contained in the bundle.
  Any exported packages are also imported by default, to ensure a consistent class space.
• <Include-Resource> is generated from the project's Maven resources, typically "src/main/resources/", which will copy the specified project directory hierarchy into the resulting bundle JAR file, mirroring standard Maven behavior.
• <Bundle-Version> is assumed to be "${pom.version}" but is normalized to the OSGi version format of "MAJOR.MINOR.MICRO.QUALIFIER", for example "2.1-SNAPSHOT" would become "2.1.0.SNAPSHOT".
• <Bundle-Name> is assumed to be "${pom.name}".
• <Bundle-Description> is assumed to be "${pom.description}".
• <Bundle-License> is assumed to be "${pom.licenses}".
• <Bundle-Vendor> is assumed to be "${pom.organization.name}".
• <Bundle-DocURL> is assumed to be "${pom.organization.<Bundle-DocURL> is assumed to be "${pom.organization.url}".

Since the plugin creates bundles for OSGi R4, it hard-codes Bundle-ManifestVersion to be '2'. Additionally, it generates imports for every export to ensure package substitutability, which is very important when working with collaborating services. It is possible to override any of these values (except Bundle-ManifestVersion) just by specifying the desired value in the plugin configuration section of the POM file.

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<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>my-osgi-bundles</groupId>
  <artifactId>examplebundle</artifactId>
  <packaging>bundle</packaging>    <!-- (1) -->
  <version>1.0</version>
  <name>Example Bundle</name>
  <dependencies>
    <dependency>
      <groupId>org.apache.felix</groupId>
      <artifactId>org.osgi.core</artifactId>
      <version>1.0.0</version>
    </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>    <!-- (2) START -->
        <groupId>org.apache.felix</groupId>
        <artifactId>maven-bundle-plugin</artifactId>

        <extensions>true</extensions>
        <configuration>
          <instructions>
            <Export-Package>com.my.company.api</Export-Package>
            <Private-Package>com.my.company.*</Private-Package>
            <Bundle-Activator>com.my.company.Activator</Bundle-Activator>
          </instructions>
        </configuration>
      </plugin>    <!-- (2) END -->
    </plugins>
  </build>
</project>

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If you want to keep your project packaging type (for example "jar") but would like to add OSGi metadata
you can use the manifest goal to generate a bundle manifest. The maven-jar-plugin can then be used to
add this manifest to the final artifact. For example:to the final artifact. For example:

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

<plugin>
  <artifactId>maven-jar-plugin</artifactId>
  <configuration>
bundle-plugin</artifactId>
  <executions>
    <execution>
      <id>bundle-manifest</id>
      <phase>process-classes</phase>
      <goals>    
      <archive>  <goal>manifest</goal>
      <manifestFile>${project.build.outputDirectory}/META-INF/MANIFEST.MF</manifestFile></goals>   
    </archive> execution>
  </configuration>executions>
</plugin>  
<plugin> 

If you want to use packaging types other than "jar" and "bundle" then you also need to enable support
for them in the bundleplugin configuration, for example if you want to use the plugin with WAR files:

<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>
</plugin>

If you want to use packaging types other than "jar" and "bundle" then you also need to enable support
for them in the bundleplugin configuration, for example if you want to use the plugin with WAR files:

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

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>
    <supportedProjectTypes><archive>
      <supportedProjectType>jar</supportedProjectType>
      <supportedProjectType>bundle</supportedProjectType>
      <supportedProjectType>war</supportedProjectType>
    </supportedProjectTypes>
    <instructions>
      <!-- ...etc... --><manifestFile>${project.build.outputDirectory}/META-INF/MANIFEST.MF</manifestFile>
    </instructions>archive>
  </configuration>
</plugin>

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• bundle - build an OSGi bundle jar for the current project
  configuration options:
  • manifestLocation defaults to ${project.build.outputDirectory}/META-INF
  • unpackBundle unpack bundle contents to output directory, defaults to false
  • excludeDependencies comma-separated list of dependency artifactIds to exclude from the classpath passed to Bnd (, use "true" to exclude everything).
    Version 2 of the bundleplugin now supports the same style of filter clauses in excludeDependencies as Embed-Dependency.
  • classifier attach bundle to the project using the given classifier
  • supportedProjectTypes defaults to "jar","bundle"

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dependencies ::= clause ( ',' clause ) *
clause ::= MATCH ( ';' attr '=' MATCH | ';inline=' inline )
attr ::= 'groupId' | 'artifactId' | 'version' | 'scope' | 'type' | 'classifier' | 'optional'
inline ::= 'true' | 'false' | PATH ( '|' PATH ) *
MATCH ::= <globbed regular expression>
PATH ::= <Ant-style path expression>

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The MATCH section accepts alternatives, separated by |, and can be negated by using ! at the beginning of the MATCH. Use * to represent zero or more unknown characters and ? to represent a single unknown characterzero or one character. You can also use standard Java regexp constructs. There is no need to escape the . character inside MATCH. The first MATCH in a clause will filter against the artifactId.

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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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