secondlevelcachestatistics.java

一个Java持久层类库

//$Id: SecondLevelCacheStatistics.java 11398 2007-04-10 14:54:07Z [e-mail] $
package org.hibernate.stat;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.hibernate.cache.CacheKey;
import org.hibernate.cache.Region;

/**
 * Second level cache statistics of a specific region
 * 
 * @author Gavin King
 */
public class SecondLevelCacheStatistics extends CategorizedStatistics {
	
    private transient Region region;
	long hitCount;
	long missCount;
	long putCount;

	SecondLevelCacheStatistics(Region region) {
		super( region.getName() );
		this.region = region;
	}
	public long getHitCount() {
		return hitCount;
	}
	public long getMissCount() {
		return missCount;
	}
	public long getPutCount() {
		return putCount;
	}
	public long getElementCountInMemory() {
		return region.getElementCountInMemory();
	}
	public long getElementCountOnDisk() {
		return region.getElementCountOnDisk();
	}
	public long getSizeInMemory() {
		return region.getSizeInMemory();
	}
	
	public Map getEntries() {
		Map map = new HashMap();
		Iterator iter = region.toMap().entrySet().iterator();
		while ( iter.hasNext() ) {
			Map.Entry me = (Map.Entry) iter.next();
			map.put( ( (CacheKey) me.getKey() ).getKey(), me.getValue() );
		}
		return map;
	}

	public String toString() {
		StringBuffer buf = new StringBuffer()
		    .append("SecondLevelCacheStatistics")
			.append("[hitCount=").append(this.hitCount)
			.append(",missCount=").append(this.missCount)
			.append(",putCount=").append(this.putCount);
		//not sure if this would ever be null but wanted to be careful
		if ( region != null ) {
			buf.append(",elementCountInMemory=").append(this.getElementCountInMemory())
				.append(",elementCountOnDisk=").append(this.getElementCountOnDisk())
				.append(",sizeInMemory=").append(this.getSizeInMemory());
		}
		buf.append(']');
		return buf.toString();
	}
}