Hello,
some contract has changed lately in the way the resources are visible on
the classpath in the project and in other projects.
My case is:
project1:
/src/main/resources/META-INF/test/res.xml
/src/test/resources/META-INF/test/test.xml
now let's see when these resources are visible:
1. /src/main/java/Main.java:
public class Main {
public static void main( String[] args ) {
System.out.println( "main: " + Main.class.getClassLoader().getResource(
"META-INF/test/res.xml" ) );
System.out.println( "test: " + Main.class.getClassLoader().getResource(
"META-INF/test/test.xml" ) );
}
}
this as expected produces:
main:
file:/C:/dev/eclipse-workspace/maventestproject1/target/classes/META-INF/test/res.xml
test: null
the test resource is not visible on main classpath.
2. /src/test/java/MainTest.java
public class MainTest {
public static void main( String[] args ) {
System.out.println( "main: " +
MainTest.class.getClassLoader().getResource( "META-INF/test/res.xml" ) );
System.out.println( "test: " +
MainTest.class.getClassLoader().getResource( "META-INF/test/test.xml" ) );
}
}
this as expected produces:
main:
file:/C:/dev/eclipse-workspace/maventestproject1/target/classes/META-INF/test/res.xml
test:
file:/C:/dev/eclipse-workspace/maventestproject1/target/test-classes/META-INF/test/test.xml
both resources from main and test classpath are properly visible
Let's create a project2 that does not hold any resources but simply
makes a dependency on project1 and run the same classes again.
Everything works for main classpath. If I run MainTest in the context of
project2 I get:
ava.lang.NoClassDefFoundError: MainTest
Caused by: java.lang.ClassNotFoundException: MainTest
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
Exception in thread "main"
The MainTest.class is not visible from project2. If I create
/src/test/java/Main2Test.java in project2:
public class Main2Test {
public static void main( String[] args ) {
System.out.println( "main: " +
Main2Test.class.getClassLoader().getResource( "META-INF/test/res.xml" ) );
System.out.println( "test: " +
Main2Test.class.getClassLoader().getResource( "META-INF/test/test.xml" ) );
}
}
this produces the unexpected result (in fact expected, but surely
unsatisfactory):
main:
file:/C:/dev/eclipse-workspace/maventestproject1/target/classes/META-INF/test/res.xml
test: null
This behaviour has changed lately. It was very convenient to create test
resources for some library projects (like logging configuration, some
test property files) which are not put into main jar file but still
visible for any project that imports the library.
Could this be reverted/made configurable?
--
Leszek Gawron
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