//$Id: CacheMode.java 9194 2006-02-01 19:59:07Z steveebersole $
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 );
}
}
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