Expansion-Resources Stacks

Expansion-resource can include dependencies on other expansion-resources. These dependencies will be fetched if the expansion-resource is not defined in the expansionSettings.xml.

We can use this mechanism to create bundles of expansion-resources. The nsx-default-stack is such a bundle. It only defines a set of dependencies on other expansion-resources.

To create a new stack, we must create an expansion-resource that declares the selected expansion-resources as dependencies.

Let's say we want to create my-stack which contains the nsx-default-stack and our own my-jpa-expanders. First we should create a Maven project file for the expansion-resource:

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>net.demo</groupId>
<artifactId>my-stack</artifactId>
<version>1.0.0</version>

<properties>
  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<build>
  <plugins>
    <plugin>
      <groupId>net.democritus.maven.plugins</groupId>
      <artifactId>expanders-maven-plugin</artifactId>
      <version>2025.3.0</version>
      <executions>
        <execution>
          <goals>
            <goal>expansionResource</goal>
          </goals>
          <configuration>
            <rootDirectory>${project.basedir}</rootDirectory>
          </configuration>
        </execution>
      </executions>
    </plugin>
  </plugins>
</build>
</project>

note

We define the project basedir as root directory to prevent the plugin.

Then we add the other expansion-resources as dependencies.

<dependencies>
<dependency>
  <groupId>net.democritus</groupId>
  <artifactId>nsx-default-stack</artifactId>
  <version>2025.1.1</version>
</dependency>
<dependency>
  <groupId>net.demo</groupId>
  <artifactId>my-jpa-expanders</artifactId>
  <version>1.0.0</version>
</dependency>
</dependencies>

Building this project will create a my-stack-1.0.0.jar. You can add it to your local or remote maven repository. We can now use the expansion-resource by adding it as net.demo:my-stack@1.0.0