com.orientechnologies.orient.core.db.OScenarioThreadLocal Maven / Gradle / Ivy

/*
 *
 *  *  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.db;

import com.orientechnologies.orient.core.OOrientListenerAbstract;
import com.orientechnologies.orient.core.OOrientShutdownListener;
import com.orientechnologies.orient.core.OOrientStartupListener;
import com.orientechnologies.orient.core.Orient;
import com.orientechnologies.orient.core.db.OScenarioThreadLocal.RUN_MODE;

/**
 * Thread local to know when the request comes from distributed requester avoiding loops.
 * 
 * @author Luca Garulli (l.garulli--at--orientechnologies.com)
 * 
 */
public class OScenarioThreadLocal extends ThreadLocal {
  public static volatile OScenarioThreadLocal INSTANCE = new OScenarioThreadLocal();

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

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

  public enum RUN_MODE {
    DEFAULT, RUNNING_DISTRIBUTED
  }

  public OScenarioThreadLocal() {
    set(RUN_MODE.DEFAULT);
  }

  @Override
  public void set(final RUN_MODE value) {
    super.set(value);
  }

  @Override
  public RUN_MODE get() {
    RUN_MODE result = super.get();
    if (result == null)
      result = RUN_MODE.DEFAULT;
    return result;
  }
}