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Appendix B. Karaf Maven Plug-In

B.1. Using the karaf-maven-plugin
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The karaf-maven-plugin enables you to create a Karaf server assembly, which is a microservices style packaging of a Karaf container. That is, the finished assembly contains all of the essential components of a Karaf installation (for example, including the contents of the etc/, data/, lib, and system directories), but stripped down to the bare minimum required to run your application.

B.2. Karaf Maven Plug-In Goals
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The following Karaf Maven plug-in goals are relevant to building server assemblies in Fuse on OpenShift:

B.2.1. karaf:assembly Goal
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The recommended way to create a Karaf server assembly is to use the karaf:assembly goal provided by the karaf-maven-plugin. This assembles a server from the Maven dependencies in the project pom.

B.2.1.1. Example of a Maven Assembly
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You can create a Karaf server assembly using the karaf:assembly goal provided by the karaf-maven-plugin. This goal assembles a microservices style server assembly from the Maven dependencies in the project POM. In a Fuse on OpenShift project, it is recommended that you bind the karaf:assembly goal to the Maven install phase. The project uses bundle packaging and the project itself gets installed into the Karaf container by listing it inside the startupBundles element. The following example displays the typical Maven configuration in a quickstart: 

<plugin>
  <groupId>org.jboss.redhat-fuse</groupId>
  <artifactId>karaf-maven-plugin</artifactId>
  <version>${fuse.version}</version>
  <extensions>true</extensions>
  <executions>
    <execution>
      <id>karaf-assembly</id>
      <goals>
        <goal>assembly</goal>
      </goals>
      <phase>install</phase>
    </execution>
  </executions>
  <configuration>

    <karafVersion>{karafMavenPluginVersion}</karafVersion>
    <useReferenceUrls>true</useReferenceUrls>
    <archiveTarGz>false</archiveTarGz>
    <includeBuildOutputDirectory>false</includeBuildOutputDirectory>
    <startupFeatures>
      <feature>karaf-framework</feature>
      <feature>shell</feature>
      <feature>jaas</feature>
      <feature>aries-blueprint</feature>
      <feature>camel-blueprint</feature>
      <feature>fabric8-karaf-blueprint</feature>
      <feature>fabric8-karaf-checks</feature>
    </startupFeatures>
    <startupBundles>
      <bundle>mvn:${project.groupId}/${project.artifactId}/${project.version}</bundle>
    </startupBundles>
  </configuration>
</plugin>
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B.2.1.2. Parameters
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The karaf:assembly goal supports the following parameters:

startupFeature
This will result in the feature bundles being listed in startup.properties at the appropriate start level and the bundles being copied into the system/ internal repository. You can use <feature-name> or <feature-name>/<feature-version> formats.
bootFeature
This will result in the feature name being added to boot-features in the features service configuration file and all the bundles in the feature copied into the system/ internal repository. You can use <feature-name> or <feature-name>/<feature-version> formats.
installedFeature
This will result in all the bundles in the feature being installed in the system/ internal repository. Therefore, at run time the feature may be installed without access to external repositories. You can use <feature-name> or <feature-name>/<feature-version> formats.
libraries

The plugin accepts the libraries element, which can have one or more library child elements that specify a library URL. For example: 

<libraries>
    <library>mvn:org.postgresql/postgresql/9.3-1102-jdbc41;type:=endorsed</library>
</libraries>
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