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/*******************************************************************************
 * Copyright (c) 1998, 2013 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the 
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 
 * which accompanies this distribution. 
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at 
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
 ******************************************************************************/  
package org.eclipse.persistence.config;

/**
 * PessimisticLock hint values.
 * 
 * The class contains all the valid values for QueryHints.PESSIMISTIC_LOCK query hint.
 * 
 * 

JPA Query Hint Usage: * *

query.setHint(QueryHints.PESSIMISTIC_LOCK, PessimisticLock.Lock); *

or *

@QueryHint(name=QueryHints.PESSIMISTIC_LOCK, value=PessimisticLock.Lock) * *

Hint values are case-insensitive. * "" could be used instead of default value PessimisticLock.DEFAULT. * * @see QueryHints * * Note: As of JPA 2.0 there is a standard way to configure pessimistic locking. * @see javax.persistence.LockModeType * @see javax.persistence.EntityManager (find(), refresh(), lock()) * @see javax.persistence.Query (setLockMode()) */ public class PessimisticLock { public static final String NoLock = "NoLock"; public static final String Lock = "Lock"; public static final String LockNoWait = "LockNoWait"; public static final String DEFAULT = NoLock; }





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