/*
* Data Hub Service (DHuS) - For Space data distribution.
* Copyright (C) 2013,2014,2015,2016 GAEL Systems
*
* This file is part of DHuS software sources.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package fr.gael.dhus.util;
public class BlockingObject
{
/**
* Retrieves the unique Object of caller method with the given key.
* <p>
* The guarantee provided by this method is that equal keys from the same
* caller method lead to the same Object.
* </p>
* <p>
* Useful to lock or to synchronize a block of instructions.
* </p>
*
* @param key associate key of caller method.
* @return the corresponding Object.
*/
public static Object getBlockingObject (String key)
{
StackTraceElement ste = Thread.currentThread ().getStackTrace ()[2];
StringBuilder sb = new StringBuilder ();
sb.append (ste.getClassName ()).append (":");
sb.append (ste.getMethodName ()).append (":");
sb.append (key);
return sb.toString ().intern ();
}
}