/*
 *
 *  *  Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.com)
 *  *
 *  *  Licensed 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.
 *  *
 *  * For more information: http://www.orientechnologies.com
 *
 */

package com.orientechnologies.orient.core.serialization.serializer.record;

import com.orientechnologies.orient.core.OOrientListenerAbstract;
import com.orientechnologies.orient.core.Orient;
import com.orientechnologies.orient.core.record.ORecord;

/**
 * Thread local to store last document to save. This is used by Auto Merge Conflict Strategy o get he pending record (not visible at
 * storage level).
 * 
 * @author Luca Garulli
 */
public class ORecordSaveThreadLocal extends ThreadLocal<ORecord> {
  public static ORecordSaveThreadLocal INSTANCE = new ORecordSaveThreadLocal();

  static {
    Orient.instance().registerListener(new OOrientListenerAbstract() {
      @Override
      public void onStartup() {
        if (INSTANCE == null)
          INSTANCE = new ORecordSaveThreadLocal();
      }

      @Override
      public void onShutdown() {
        INSTANCE = null;
      }
    });
  }

  public static ORecord getLast() {
    return INSTANCE.get();
  }

  public static void setLast(final ORecord document) {
    INSTANCE.set(document);
  }

  public static void removeLast() {
    INSTANCE.set(null);
  }
}