/*
 * Copyright (C) 2009 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.exoplatform.services.jcr.impl.value;

import junit.framework.TestCase;

import org.exoplatform.services.jcr.impl.dataflow.persistent.ByteArrayPersistedValueData;
import org.exoplatform.services.jcr.impl.dataflow.persistent.CleanableFilePersistedValueData;
import org.exoplatform.services.jcr.impl.dataflow.persistent.FilePersistedValueData;
import org.exoplatform.services.jcr.impl.storage.value.fs.Probe;
import org.exoplatform.services.jcr.impl.util.io.FileCleaner;
import org.exoplatform.services.jcr.impl.util.io.SwapFile;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

/**
 * Created by The eXo Platform SAS.
 * 
 * @author Gennady Azarenkov
 * @version $Id: TestPersistedValueData.java 11907 2008-03-13 15:36:21Z ksm $
 */

public class TestPersistedValueData extends TestCase
{

   public void testCreateByteArrayValueData() throws Exception
   {
      byte[] buf = "0123456789".getBytes();
      ByteArrayPersistedValueData vd = new ByteArrayPersistedValueData(0, buf);
      assertTrue(vd.isByteArray());
      assertEquals(10, vd.getLength());
      assertEquals(0, vd.getOrderNumber());
      assertEquals(10, vd.getAsByteArray().length);
      assertTrue(vd.getAsStream() instanceof ByteArrayInputStream);
   }

   public void testCreateFileStreamValueData() throws Exception
   {

      byte[] buf = "0123456789".getBytes();
      File file = new File("target/testCreateFileStreamValueData");
      if (file.exists())
         file.delete();
      FileOutputStream out = new FileOutputStream(file);
      out.write(buf);
      out.close();

      FilePersistedValueData vd = new FilePersistedValueData(0, file);
      assertFalse(vd.isByteArray());
      assertEquals(10, vd.getLength());
      assertEquals(0, vd.getOrderNumber());
      try
      {
         vd.getAsByteArray();
      }
      catch (IllegalStateException e)
      {
         fail("IllegalStateException should not have been thrown!");
      }
      assertTrue(vd.getAsStream() instanceof FileInputStream);
   }

   public void testIfFinalizeRemovesTempFileStreamValueData() throws Exception
   {
      FileCleaner testFileCleaner = new FileCleaner(1000, true);
      try
      {
         byte[] buf = "0123456789".getBytes();
         SwapFile file = SwapFile.get(new File("target"), "testIfFinalizeRemovesTempFileStreamValueData");
         //File file = new File("target/testIfFinalizeRemovesTempFileStreamValueData");
         //if (file.exists())
         //  file.delete();
         FileOutputStream out = new FileOutputStream(file);
         out.write(buf);
         out.close();

         CleanableFilePersistedValueData vd = new CleanableFilePersistedValueData(0, file, testFileCleaner);
         assertTrue(file.exists());

         vd = null;
         System.gc();

         // allows GC to call finalize on vd
         Thread.sleep(2500);
         System.gc();

         assertFalse(file.exists());
      }
      finally
      {
         testFileCleaner.halt();
      }
   }

   public void testConcurrentFileStreamValueDataReading() throws Exception
   {

      byte[] buf =
         "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789"
            .getBytes();
      File file = new File("target/testConcurrentFileStreamValueDataReading");
      if (file.exists())
         file.delete();
      FileOutputStream out = new FileOutputStream(file);
      // approx. 10Kb file
      for (int i = 0; i < 100; i++)
      {
         out.write(buf);
      }
      out.close();

      Probe[] p = new Probe[10];
      for (int i = 0; i < 10; i++)
      {
         p[i] = new Probe(file);
         p[i].start();
      }

      // should be enough to finish all the threads
      Thread.sleep(4000);

      for (int i = 0; i < 10; i++)
      {
         assertEquals(100 * 100, p[i].getLen());
      }
   }

}
