Resources are not being loaded for shade plugin

Question

The below code is able to scan all the dependencies and load the resources when I am executing it from IntelliJ as IntelliJ resolves dependencies from the .m2 repo, but it's not able to load anything when running from the fat jar created by shade. any help?
The below code is not producing any output when executed from shade plugin, while from eclipse it is printing all the relevant properties.

ClassLoader str = ClassLoader.getSystemClassLoader();

try {
  Enumeration<URL> resURLs = str.getResources("properties/sample/i18n-resources.properties");
  while (resURLs.hasMoreElements()) {
    URL resURL = (URL) resURLs.nextElement();
    System.out.println("file path : " + resURL.getFile());
  }
}
catch (Exception e){
    System.out.println("resource exception");
}

pom file :

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-shade-plugin</artifactId>
  <version>3.2.2</version>
  <configuration>
    <filters>
    <filter>
      <artifact>*:*</artifact>
      <excludes>
      <exclude>META-INF/*.SF</exclude>
      <exclude>META-INF/*.DSA</exclude>
      <exclude>META-INF/*.RSA</exclude>
      </excludes>
    </filter>
      </filters>
        <transformers>
            <transformer
                    implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
              <mainClass>com.sample.extract.samples.SampleClient</mainClass>
            </transformer>
        </transformers>
          <shadedArtifactAttached>true</shadedArtifactAttached>
          <shadedArtifactId>application</shadedArtifactId>
        </configuration>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>shade</goal>
            </goals>
          </execution>
        </executions>
</plugin>

- Code is not formatted - What is the result of the program? exception? — Klapsa2503, Apr 09 '22 at 02:21
No Exception, Just that it is not able to find all the properties files including dependant jars, while with eclipse, it prints them. — Amit Kumar, Apr 09 '22 at 06:06

score 0 · Answer 1 · answered Apr 13 '22 at 04:14

Analyze it as follows:

remove configs such as shadedArtifactAttached, shadedArtifactId, filters - basically just keep transformers only. There is simple example here
before try {} catch add some directory logging - print what is in current . directory, print what is in ./properties etc.

My suspisions:

properties files are not included
path to file is invalid (the invocation directory differs between InteliJ and running via shade)

Also if possible please attach the full code sample so anyone can download and run it

Resources are not being loaded for shade plugin

1 Answers1