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How to use the iPOJO Maven Plug-in

Basic configuration

To use the iPOJO Maven plug-in, edit the following pom.xml (replace all $XXX elements):

<packaging>bundle</packaging> 
<groupId>$YOUR_GROUP_ID</groupId>
<artifactId>$YOUR_ARTIFACT_ID</artifactId>
<version>$YOUR_ARTIFACT_VERSION</version>
<name>$YOUR_PROJECT_NAME</name>

<dependencies>
$YOUR_MAVEN_DEPENDENCIES
</dependencies>

<build>
   <plugins>
     
     <plugin>
       <groupId>org.apache.felix</groupId>
       <artifactId>maven-bundle-plugin</artifactId>
        <extensions>true</extensions>
        <configuration>
          <instructions>
            <Bundle-SymbolicName>${pom.artifactId}</Bundle-SymbolicName>
           <Private-Package>$YOUR_PRIVATE_PACKAGE</Private-Package>
           <Export-Package>$YOUR_EXPORTED_PACKAGE</Export-Package>
         </instructions>
       </configuration>
     </plugin>
     
     <plugin>
             <groupId>org.apache.felix</groupId>
             <artifactId>maven-ipojo-plugin</artifactId>
             <version>1.6.0</version>
        <executions>
          <execution>
              <goals>
                     <goal>ipojo-bundle</goal>
              </goals>
         </execution>
       </executions>
     </plugin>
   </plugins>
</build>
</project>

The iPOJO Maven Plug-in is generally used with the BND Maven Plug-in (more details here). However the two configurations are completely separated. So, you can use all BND Maven plug-in features. The iPOJO configuration section can be used as previously written without any changes. However it requires that your metadata file is either inside src/main/ipojo or inside the src/main/resources folder and named "metadata.xml".

Execution

To manipulate your project, use the "mvn clean install" command. The output should be like:

[INFO] Scanning for projects...
[INFO] ----------------------------------------------------------------------------
[INFO] Building Hello Client
[INFO] task-segment: [clean, install]
[INFO] ----------------------------------------------------------------------------
[INFO] [clean:clean]
[INFO] Deleting directory D:\clement\workspaces\iPOJO-Dev\hello.client\target
[INFO] Deleting directory D:\clement\workspaces\iPOJO-Dev\hello.client\target\classes
[INFO] Deleting directory D:\clement\workspaces\iPOJO-Dev\hello.client\target\test-classes
[INFO] Deleting directory D:\clement\workspaces\iPOJO-Dev\hello.client\target\site
[INFO] [resources:resources]
[INFO] Using default encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] [compiler:compile]
[INFO] Compiling 1 source file to D:\clement\workspaces\iPOJO-Dev\hello.client\target\classes
[INFO] [resources:testResources]
[INFO] Using default encoding to copy filtered resources.
[INFO] Resource directory does not exist: D:\clement\workspaces\iPOJO-Dev\hello.client\src\test\resources
[INFO] [compiler:testCompile]
[INFO] No sources to compile
[INFO] [surefire:test]
[INFO] No tests to run.
[INFO] [bundle:bundle]
[INFO] [org.apache.felix.ipojo.:ipojo-bundle {execution: default}]
[INFO] Start bundle manipulation
[INFO] Metadata File : D:\clement\workspaces\iPOJO-Dev\hello.client\target\classes\metadata.xml
[INFO] Input Bundle File : D:\clement\workspaces\iPOJO-Dev\hello.client\target\hello.client-0.0.1.jar
[INFO] Bundle manipulation - SUCCESS
[INFO] [install:install]
[INFO] Installing D:\clement\workspaces\iPOJO-Dev\hello.client\target\hello.client-0.0.1.jar to D:\Dev\maven-repo\ipojo\example\hello.client\0.0.1\hello.client-0.0.1.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 9 seconds
[INFO] Finished at: Mon Aug 13 14:04:55 CEST 2007
[INFO] Final Memory: 6M/13M
[INFO] ------------------------------------------------------------------------

Configuration Options

You can configure the localization of the iPOJO metadata file as following:

<plugin>
    <groupId>org.apache.felix</groupId>
    <artifactId>maven-ipojo-plugin</artifactId>
    <version>1.6.0</version>
    <executions>
        <execution>
        <goals>
            <goal>ipojo-bundle</goal>
        </goals>
        <configuration>
             <metadata>ipojo/meta.xml</metadata>
        </configuration>
        </execution>
   </executions>
</plugin>

In the metadata element, you can specify your metadata file or directory. The given file path is relative to the root directory ("./ipojo/meta.xml"). If the specified location is a directory, all contained XML files will be used. By default, the plugin searches metadata files into the src/main/ipojo folder. If not found then it searches for target/classes/metadata.xml and ./metadata.xml.

Note: The directory support was introduced in the 1.7.0 version. Previously only one metadata file was found.
Compatibility: Before the 1.7.0, the set location was searched in all resource folders. This is no more supported because it's an anti-pattern.

The second option allows skipping annotations processing, by using the ignoreAnnotations element:

<plugin>
    <groupId>org.apache.felix</groupId>
    <artifactId>maven-ipojo-plugin</artifactId>
    <version>1.6.0</version>
    <executions>
        <execution>
        <goals>
            <goal>ipojo-bundle</goal>
        </goals>
        <configuration>
            <ignoreAnnotations>true</ignoreAnnotations>
        </configuration>
        </execution>
   </executions>
</plugin>

You can also ignore embedded XML-Schemas to use external ones. To do so, add the ignoreEmbeddedSchemas. If set to true, the manipulator doesn't use embedded XML-Schemas:

<plugin>
    <groupId>org.apache.felix</groupId>
    <artifactId>maven-ipojo-plugin</artifactId>
    <version>1.6.0</version>
    <executions>
        <execution>
        <goals>
            <goal>ipojo-bundle</goal>
        </goals>
        <configuration>
            <ignoreEmbeddedSchemas>true</ignoreEmbeddedSchemas>
        </configuration>
        </execution>
   </executions>
</plugin>

Generate the skeleton of your iPOJO bundle

The maven-ipojo-plugin provides a way to generate the skeleton of your project. To generate this structure, just launch the following command:

mvn org.apache.maven.plugins:maven-archetype-plugin:generate \
-DarchetypeArtifactId=maven-ipojo-plugin \
-DarchetypeGroupId=org.apache.felix \
-DartifactId=ARTIFACT_NAME_OF_YOUR_PROJECT \
-DgroupId=GROUP_ID_OF_YOUR_PROJECT \
-DarchetypeVersion=VERSION_OF_YOUR_PROJECT \
-DpackageName=PACKAGE_NAME

This command generates :

a pom file (to update),
the src/main/java and src/main/resources folders,
the structure of your package name.

The generated project uses iPOJO annotation and is ready to be deployed.

Maven Archetype

The maven-ipojo-plugin archetype generates a pom file using the latest released version of the maven-ipojo-plugin.

Describing iPOJO configuration in the pom file

It is also possible to describe iPOJO components and instances inside the pom file (avoiding using a externalized file). The configuration can be described in the metadata attribute inside a CDATA block.

<plugin>
   <groupId>org.apache.felix</groupId>
   <artifactId>maven-ipojo-plugin</artifactId>
   <version>1.6.0</version>
   <executions>
       <execution>
       <goals>
       <goal>ipojo-bundle</goal>
       </goals>
       <configuration>
       <ignoreAnnotations>true</ignoreAnnotations>
       <metadata>
       <![CDATA[
       <ipojo
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="org.apache.felix.ipojo http://felix.apache.org/ipojo/schemas/CURRENT/core.xsd"
       xmlns="org.apache.felix.ipojo">
        <component
        classname="org.apache.felix.ipojo.test.scenarios.component.LifecycleControllerTest"
        name="LFC-Test">
        <provides />
        <controller field="m_state" />
        <properties>
        <property name="conf" field="m_conf" method="setConf" />
        </properties>
        </component>
        <component
        classname="org.apache.felix.ipojo.test.scenarios.component.LifecycleControllerTest"
        name="LFC-Test-Immediate" immediate="true" architecture="true">
        <provides />
        <controller field="m_state" />
        <properties>
        <property name="conf" field="m_conf" method="setConf" />
        </properties>
        </component>
       </ipojo>
       ]]>
    </metadata>
    </configuration>
    </execution>
   </executions>
</plugin>

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iPOJO Maven Plug-in