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javareflectionclassloader

With websphere liberty or apache tomcat 8 or in java code in general how to print the full path of third-party or first-party class

I am trying to see where a first party class and third-party class are loaded from say a websphere liberty as well as apache tomcat. When I use -verbose:class, I see a bunch of paths but don't see the path in question. It looks like liberty related paths but not the third-party path was looking for.

For example, let's say the class is just org/apache/loggger/Logger.class where is that class?

I tried Reflections library, was sure if that was the right use case.

I tried these approaches below, didn't find what was looking for. The class is there at compile time. Also couldn't find any third-party classes this way.

    final ClassLoader loader = ServletVers2.class.getClassLoader();
    System.out.println(loader.getResource("com/ca/services/servlet/ServletVers2.class"));
    System.out.println(loader.getResource("com/ca/apps/shared/utils/BuildVersion.class"));

    final ClassLoader classloader2 = ClassLoader.getSystemClassLoader();
    final ClassLoader classloader3 = ClassLoader.getSystemClassLoader().getParent();

    System.out.println(loader.getResource("org/apache/logging/log4j/LogManager.class"));
    System.out.println(loader.getResource("org/apache/log4j/Logger.class"));

    System.out.println(classloader2.getResource("org/apache/logging/log4j/LogManager.class"));
    System.out.println(classloader2.getResource("org/apache/log4j/Logger.class"));

    System.out.println(classloader3.getResource("org/apache/logging/log4j/LogManager.class"));
    System.out.println(classloader3.getResource("org/apache/log4j/Logger.class"));
    
    Reflections reflections = new Reflections("com.apps.shared.utils.BuildVersion", new SubTypesScanner(false));
Solution

  • Per the comments, this should work. It is not entirely what I was looking for but will continue with this.

    Logger.class.getResource("Logger.class"). Alternatively, org.apache.log4j.Logger.class.getClassLoader().getResource( "org/apache/log4j/Logger.class")