Maven NAR plugin + Spring boot in webapp, loading .nar artifact in Tomcat

Question

I've managed to add platform dependencies to war and generated by maven-nar-plugin jni artifact into WEB-INF/lib/ .

But the problem is: added artifact has .nar extension while WebappClassLoaderBase adds only .jar s to its internal class repositories, so my jni bridge is not loaded and class is inaccessible leading to ClassNotFoundException .

What are my options here? I assume it's possible to

1. somehow change artifact extension on spring-boot:repackage ?
2. add this custom artifact to classloader repositories?

Which would be better and how would I implement it?

Answer 1

Ok, so I've ended up with maven-dependency-plugin :

<build>
...
<plugins>
  <plugin>
     <groupId>org.apache.maven.plugins</groupId>
     <artifactId>maven-dependency-plugin</artifactId>
     <executions>
       <execution>
         <goals>
           <goal>copy</goal>
         </goals>
         <configuration>
           <artifactItems>
             <artifactItem>
               <groupId>${dep.groupId}</groupId>
               <artifactId>${dep.artifactId}</artifactId>
               <version>${dep.version}</version>
               <type>nar</type>
               <outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/lib</outputDirectory>
               <destFileName>${dep.artifactId}-${dep.version}.jar</destFileName>
             </artifactItem>
           </artifactItems>
         </configuration>
       </execution>
     </executions>
  </plugin>
  ...
</plugins>
</build>

But still, there is a problem with redeployments to deal with, so if you realy want to do this, here is the way, but you probably don't need it that hard.