[MENFORCER-473] Custom Rules are not processed with Java 17

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.2.1
• Component/s: externalRules, Plugin, Rule API
• Environment: Windows, Java 17
• Assignee: Unassigned
• Reporter: Nils Christian Ehmke
• Created: 16/Mar/23 06:52
• Updated: 04/Dec/24 21:13

Description

Hi,

We noticed that our custom rule, using the newer API (as documented here) is not processed using Java 17.

We created a sample project using the custom rule example. Once we use Java 17 in the pom.xml it breaks.

<properties>
	<api.version>3.2.1</api.version>
	<maven.version>3.9.0</maven.version>
	<!-- use JDK 1.8 at least -->
	<maven.compiler.source>17</maven.compiler.source>
	<maven.compiler.target>17</maven.compiler.target>
</properties>
...
<plugin>
	<groupId>org.apache.maven.plugins</groupId>
	<artifactId>maven-compiler-plugin</artifactId>
	<version>3.11.0</version>
</plugin>
<plugin>
	<!-- generate index of project components -->
	<groupId>org.eclipse.sisu</groupId>
	<artifactId>sisu-maven-plugin</artifactId>
	<version>0.9.0.M1</version>
	<executions>
		<execution>
			<goals>
				<goal>main-index</goal>
			</goals>
		</execution>
	</executions>
</plugin>

If we compile the custom rule and verify the using project, we get

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-enforcer-plugin:3.2.1:enforce (enforce) on project maven-enforcer-plugin-sample-usage: Execution enforce of goal org.apache.maven.plugins:maven-enforcer-plugin:3.2.1:enforce failed: Failed to create enforcer rules with name: myCustomRule or for class: org.apache.maven.plugins.enforcer.MyCustomRule -> [Help 1]

The index file itself looks good, so something else within the plugin or Sisu Plexus seems to break.

Issue Links

• is blocked by: MNG-7587 Update Sisu to a version supporting at least Java 17
• is related to: MNG-7913 Upgrade Sisu version to 0.9.0.M2
• links to: GitHub Pull Request #264