package org.jboss.test.virtual.test;

import org.jboss.virtual.VFS;
import org.jboss.virtual.VirtualFile;
import org.jboss.virtual.VirtualFileVisitor;
import org.jboss.virtual.VisitorAttributes;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

/**
 * @author <a href="mailto:mstrukel@redhat.com">Marko Strukelj</a>
 */
public class VFSZipMemoryTestCase extends AbstractVFSTest
{
   public VFSZipMemoryTestCase(String name)
   {
      super(name, true);
   }

   public void testMemoryUsage() throws Exception
   {
      String DIR = "c:/development/test/GateIn-3.1.0-CR01/server/default/deploy/";

      for (int i=0; i<2; i++)
      {
         // visit a big archive
         URL url = new File(DIR).toURL();
         VFS vfs = VFS.getVFS(new URL("file:" + url.getPath()));
         //VFSUtils.enableNoReaper(vfs);


         // fully read everything inside
         vfs.visit(new VirtualFileVisitor()
         {
            public VisitorAttributes getAttributes()
            {
               return VisitorAttributes.RECURSE_LEAVES_ONLY;
            }

            public void visit(VirtualFile virtualFile)
            {
               try
               {
                  System.out.println(virtualFile);
                  InputStream in = virtualFile.openStream();
                  byte [] buf = new byte[100000];
                  while (in.read(buf) != -1)
                  {
                     // we're just reading and dumping
                  }
               }
               catch (IOException e)
               {
                  throw new RuntimeException("Failed to read virtual file: " + virtualFile, e);
               }
            }
         });

         // gc + measure memory usage
         System.gc();
         System.out.println("Used memory: " + (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()));

         // wait a little
         Thread.sleep(10000);

         // gc + measure memory usage again
         System.gc();
         System.out.println("Used memory: " + (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()));

         Thread.sleep(10000);

         // gc + measure memory usage again
         System.gc();
         System.out.println("Used memory: " + (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()));

      }
   }

}