POM Migration

POM Skeleton

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <!-- (1) -->
    <parent>
        <artifactId>snap-engine</artifactId>
        <groupId>org.esa.snap</groupId>
        <version>2.0.0-SNAPSHOT</version>
    </parent>

    <!-- (2) -->
    <artifactId>mymod</artifactId>
    <!-- (3) -->
    <packaging>nbm</packaging>

    <!-- (4) -->
    <name>Human-readable mymod name</name>
    <!-- (5) -->
    <description>Human-readable mymod description.</description>

    <dependencies>
        <!-- (6) -->
        <dependency>
            <groupId>jdom</groupId>
            <artifactId>jdom2</artifactId>
            <version>2.1</version>
        </dependency>
        <!-- (7) -->
        <dependency>
            <groupId>org.esa.snap</groupId>
            <artifactId>snap-ceres-core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.esa.snap</groupId>
            <artifactId>snap-core</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <!-- (8) -->
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>nbm-maven-plugin</artifactId>
                <configuration>
                    <publicPackages>
                        <!-- (9) -->
                        <publicPackage>org.jdom2.*</publicPackage>
                        <!-- (10) -->
                        <publicPackage>org.esa.snap.myext</publicPackage>
                    </publicPackages>
                </configuration>
            </plugin>
            <!-- (11) -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <useDefaultManifestFile>true</useDefaultManifestFile>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

Use the parent for extension modules.
The artifactId will be used with the groupId to generate the manifest header OpenIDE-Module. The groupId and version are inherited from parent in this case. version will generate the manifest headers OpenIDE-Module-Specification-Version and OpenIDE-Module-Implementation-Version, the latter will include a timestamp.
Packing must always be nbm to generate NBM files.
Name will generate the manifest header OpenIDE-Module-Name.
Description will be used to generate OpenIDE-Module-Short-Description
This 3rd-party dependency will result in a private JAR located in ${cluster}/modules/ext/org.esa.snap.mymod/jdom2.jar. Another NB module depending on mymod and wanting to use jdom2 does not need to import it explicitely again as long as you export its API as a public package(s). See below. If you don't export the jdom2 API, a second private ext-JAR will be created in the cluster.
The following are NB-module dependencies from which the manifest header OpenIDE-Module-Module-Dependencies will be derived.
Required declaration of the Maven NBM plugin.
Optinally export the 3rd party jdom2 API so that other modules don't need to import the JAR.
Optionally export API from myext.
Note that org.esa.snap.myext only exports classes in the myext package, while the value org.esa.snap.myext.* exports myext plus all subpackages, recursively.
Required declaration of the Maven JAR Plugin. useDefaultManifestFile must be set to true.