/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2000 - 2008, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * 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.jboss.cache.lock;

/**
 * Various transaction isolation levels as an enumerated class.  Note that <a href="http://wiki.jboss.org/wiki/JBossCacheMVCC">MVCC</a>
 * in JBoss Cache 3.0.0 and above only supports {@link #READ_COMMITTED} and {@link #REPEATABLE_READ}, upgrading where possible.
 * <p/>
 * Also note that JBoss Cache defaults to {@link #REPEATABLE_READ}.
 * <p/>
 *
 * @see <a href="http://en.wikipedia.org/wiki/Isolation_%28computer_science%29">Isolation levels</a>
 */
public enum IsolationLevel
{
   /**
    * No isolation.
    */
   NONE,
   SERIALIZABLE,
   REPEATABLE_READ,
   READ_COMMITTED,
   READ_UNCOMMITTED
}