EntityCache


1   /*
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3   * Copyright 2005, JBoss Inc., and individual contributors as indicated
4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
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8   * under the terms of the GNU Lesser General Public License as
9   * published by the Free Software Foundation; either version 2.1 of
10  * the License, or (at your option) any later version.
11  *
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13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this software; if not, write to the Free
19  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21  */
22  package org.jboss.ejb;
23  
24  /**
25   * EntityCaches can work from several keys.
26   *
27   * <p>A cache can use the natural primaryKey from the EJBObject, or DB
28   *    dependent keys or a proprietary key
29   *
30   * @see EntityInstanceCache
31   * 
32   * @author <a HREF="mailto:marc.fleury@telkel.com">Marc Fleury</a>
33   * @version $Revision: 37459 $
34   */
35  public interface EntityCache
36     extends InstanceCache
37  {
38     /**
39      * Returns the key used to cache the context
40      *
41      * @param id    Object id / primary key
42      * @return      Cache key
43      */
44     Object   createCacheKey(Object   id);
45  }
46
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