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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 <tt>hibernate.cache.use_minimal_puts</tt> is bypassed, in
* order to <em>force</em> 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
);
}
}