/*
* 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.cache;
import java.util.Collections;
import java.util.Hashtable;
import java.util.Map;
/**
* A lightweight implementation of the <tt>Cache</tt> interface
* @author Gavin King
*/
public class HashtableCache implements Cache {
private final Map hashtable = new Hashtable();
private final String regionName;
public HashtableCache(String regionName) {
this.regionName = regionName;
}
public String getRegionName() {
return regionName;
}
public Object read(Object key) throws CacheException {
return hashtable.get(key);
}
public Object get(Object key) throws CacheException {
return hashtable.get(key);
}
public void update(Object key, Object value) throws CacheException {
put(key, value);
}
public void put(Object key, Object value) throws CacheException {
hashtable.put(key, value);
}
public void remove(Object key) throws CacheException {
hashtable.remove(key);
}
public void clear() throws CacheException {
hashtable.clear();
}
public void destroy() throws CacheException {
}
public void lock(Object key) throws CacheException {
// local cache, so we use synchronization
}
public void unlock(Object key) throws CacheException {
// local cache, so we use synchronization
}
public long nextTimestamp() {
return Timestamper.next();
}
public int getTimeout() {
return Timestamper.ONE_MS * 60000; //ie. 60 seconds
}
public long getSizeInMemory() {
return -1;
}
public long getElementCountInMemory() {
return hashtable.size();
}
public long getElementCountOnDisk() {
return 0;
}
public Map toMap() {
return Collections.unmodifiableMap(hashtable);
}
public String toString() {
return "HashtableCache(" + regionName + ')';
}
}