GlassfishUrlClassLoader - logging

- Usage: to see order of things touched on start/stop

Signed-off-by: David Matějček <david.matejcek@omnifish.ee>

nucleus/common/common-util/src/main/java/org/glassfish/common/util/GlassfishUrlClassLoader.java

@@ -17,10 +17,17 @@
 package org.glassfish.common.util;
 
 import java.io.Closeable;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.System.Logger;
 import java.net.URL;
 import java.net.URLClassLoader;
 import java.net.URLStreamHandlerFactory;
 import java.util.Arrays;
+import java.util.Enumeration;
+
+import static java.lang.System.Logger.Level.DEBUG;
+import static java.lang.System.Logger.Level.TRACE;
 
 
 /**
@@ -34,6 +41,8 @@
  */
 public class GlassfishUrlClassLoader extends URLClassLoader {
 
+    private static final Logger LOG = System.getLogger(GlassfishUrlClassLoader.class.getName());
+
     static {
         registerAsParallelCapable();
     }
@@ -72,6 +81,58 @@ public GlassfishUrlClassLoader(URL[] urls, ClassLoader parent, URLStreamHandlerF
     }
 
 
+    @Override
+    protected Class<?> findClass(final String name) throws ClassNotFoundException {
+        LOG.log(TRACE, "findClass(name={0})", name);
+        return super.findClass(name);
+    }
+
+
+    @Override
+    public URL findResource(final String name) {
+        LOG.log(TRACE, "findResource(name={0})", name);
+        return super.findResource(name);
+    }
+
+
+    @Override
+    public Enumeration<URL> findResources(final String name) throws IOException {
+        LOG.log(TRACE, "findResources(name={0})", name);
+        return super.findResources(name);
+    }
+
+
+    @Override
+    public InputStream getResourceAsStream(String name) {
+        LOG.log(TRACE, "getResourceAsStream(name={0})", name);
+        return super.getResourceAsStream(name);
+    }
+
+
+    @Override
+    protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
+        LOG.log(DEBUG, "loadClass(name={0}, resolve={1})", name, resolve);
+        return super.loadClass(name, resolve);
+    }
+
+
+    @Override
+    protected Package definePackage(String name, String specTitle, String specVersion, String specVendor,
+        String implTitle, String implVersion, String implVendor, URL sealBase) {
+        LOG.log(DEBUG,
+            "definePackage(name={0}, specTitle={1}, specVersion={2}, specVendor={3}, implTitle={4}, implVersion={5}, implVendor={6}, sealBase={7})",
+            name, specTitle, specVersion, specVendor, implTitle, implVersion, implVendor, sealBase);
+        return super.definePackage(name, specTitle, specVersion, specVendor, implTitle, implVersion, implVendor, sealBase);
+    }
+
+
+    @Override
+    public void close() throws IOException {
+        LOG.log(DEBUG, "close()");
+        super.close();
+    }
+
+
     /**
      * Returns class name, hash code and list of managed urls.
      */