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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
/**
* Controls how the session interacts with the second-level
* cache and query cache.
*
* @see Session#setCacheMode(CacheMode)
* @author Gavin King
*/
public final class CacheMode implements Serializable {
private final String name;
private final boolean isPutEnabled;
private final boolean isGetEnabled;
private static final Map INSTANCES = new HashMap();
private CacheMode(String name, boolean isPutEnabled, boolean isGetEnabled) {
this.name=name;
this.isPutEnabled = isPutEnabled;
this.isGetEnabled = isGetEnabled;
}
public String toString() {
return name;
}
public boolean isPutEnabled() {
return isPutEnabled;
}
public boolean isGetEnabled() {
return isGetEnabled;
}
/**
* The session may read items from the cache, and add items to the cache
*/
public static final CacheMode NORMAL = new CacheMode("NORMAL", true, true);
/**
* The session will never interact with the cache, except to invalidate
* cache items when updates occur
*/
public static final CacheMode IGNORE = new CacheMode("IGNORE", false, false);
/**
* The session may read items from the cache, but will not add items,
* except to invalidate items when updates occur
*/
public static final CacheMode GET = new CacheMode("GET", false, true);
/**
* The session will never read items from the cache, but will add items
* to the cache as it reads them from the database.
*/
public static final CacheMode PUT = new CacheMode("PUT", true, false);
/**
* The session will never read items from the cache, but will add items
* to the cache as it reads them from the database. In this mode, the
* effect of hibernate.cache.use_minimal_puts is bypassed, in
* order to force a cache refresh
*/
public static final CacheMode REFRESH = new CacheMode("REFRESH", true, false);
static {
INSTANCES.put( NORMAL.name, NORMAL );
INSTANCES.put( IGNORE.name, IGNORE );
INSTANCES.put( GET.name, GET );
INSTANCES.put( PUT.name, PUT );
INSTANCES.put( REFRESH.name, REFRESH );
}
private Object readResolve() {
return INSTANCES.get( name );
}
public static CacheMode parse(String name) {
return ( CacheMode ) INSTANCES.get( name );
}
}
