https://github.com/javaee/jpa-spec: Java(TM) Persistence API 
Copyright (c) 2008 - 2014 Oracle Corporation. 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:
    Linda DeMichiel - Java Persistence 2.1
    Linda DeMichiel - Java Persistence 2.0

/*******************************************************************************
 * Copyright (c) 2008 - 2014 Oracle Corporation. 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:
 *     Linda DeMichiel - Java Persistence 2.1
 *     Linda DeMichiel - Java Persistence 2.0
 *
 ******************************************************************************/ 
package javax.persistence;


Specifies how the provider must use a second-level cache for the
persistence unit.  Corresponds to the value of the persistence.xml
shared-cache-mode element, and returned as the result of PersistenceUnitInfo.getSharedCacheMode(). 
Since:Java Persistence 2.0
/**
 * Specifies how the provider must use a second-level cache for the
 * persistence unit.  Corresponds to the value of the <code>persistence.xml</code>
 * <code>shared-cache-mode</code> element, and returned as the result of
 * {@link javax.persistence.spi.PersistenceUnitInfo#getSharedCacheMode()}.
 * 
 * @since Java Persistence 2.0
 */
public enum SharedCacheMode {

    
All entities and entity-related state and data are cached.

/**
     * All entities and entity-related state and data are cached.
     */
    ALL, 

    
Caching is disabled for the persistence unit.

/**
     * Caching is disabled for the persistence unit.
     */
    NONE, 

    
Caching is enabled for all entities for Cacheable(true)
is specified.  All other entities are not cached.

/**
     * Caching is enabled for all entities for <code>Cacheable(true)</code>
     * is specified.  All other entities are not cached.
     */
    ENABLE_SELECTIVE, 

    
Caching is enabled for all entities except those for which
Cacheable(false) is specified.  Entities for which
Cacheable(false) is specified are not cached.

/**
     * Caching is enabled for all entities except those for which
     * <code>Cacheable(false)</code> is specified.  Entities for which
     * <code>Cacheable(false)</code> is specified are not cached.
     */
    DISABLE_SELECTIVE, 

    
Caching behavior is undefined: provider-specific defaults may apply.

/**
     * 
     * Caching behavior is undefined: provider-specific defaults may apply.
     */
    UNSPECIFIED
}