org.hornetq.core.journal.impl.JournalRecord Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2005-2014 Red Hat, Inc.
 * Red Hat licenses this file to you under the Apache License, version
 * 2.0 (the "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *    http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.  See the License for the specific language governing
 * permissions and limitations under the License.
 */
package org.hornetq.core.journal.impl;

import java.util.ArrayList;
import java.util.List;

import org.hornetq.api.core.Pair;

/**
 * This holds the relationship a record has with other files in regard to reference counting.
 * Note: This class used to be called PosFiles
 *
 * Used on the ref-count for reclaiming
 *
 * @author Clebert Suconic
 * */
public class JournalRecord
{
   private final JournalFile addFile;

   private final int size;

   private List> updateFiles;

   public JournalRecord(final JournalFile addFile, final int size)
   {
      this.addFile = addFile;

      this.size = size;

      addFile.incPosCount();

      addFile.addSize(size);
   }

   void addUpdateFile(final JournalFile updateFile, final int size)
   {
      if (updateFiles == null)
      {
         updateFiles = new ArrayList>();
      }

      updateFiles.add(new Pair(updateFile, size));

      updateFile.incPosCount();

      updateFile.addSize(size);
   }

   void delete(final JournalFile file)
   {
      file.incNegCount(addFile);
      addFile.decSize(size);

      if (updateFiles != null)
      {
         for (Pair updFile : updateFiles)
         {
            file.incNegCount(updFile.getA());
            updFile.getA().decSize(updFile.getB());
         }
      }
   }

   @Override
   public String toString()
   {
      StringBuilder buffer = new StringBuilder();
      buffer.append("JournalRecord(add=" + addFile.getFile().getFileName());

      if (updateFiles != null)
      {

         for (Pair update : updateFiles)
         {
            buffer.append(", update=" + update.getA().getFile().getFileName());
         }

      }

      buffer.append(")");

      return buffer.toString();
   }
}