//$Id: HashtableCache.java 6478 2005-04-21 07:57:19Z oneovthafew $
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 + ')';
}
}
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