JmxBoundedMultiLruCache.java

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/**
 * @Version $Id: JmxBoundedMultiLruCache.java,v 1.5 2006/10/23 20:55:57 jluehe Exp $
 * Created on May 4, 2005 07:40 PM
 */

package com.sun.appserv.util.cache.mbeans;

import com.sun.appserv.util.cache.BoundedMultiLruCache;
import com.sun.appserv.util.cache.Constants;
/**
 * This class provides implementation for JmxLruCache MBean
 *
 * @author Krishnamohan Meduri (Krishna.Meduri@Sun.com)
 *
 */
public class JmxBoundedMultiLruCache extends JmxMultiLruCache 
                              implements JmxBoundedMultiLruCacheMBean {

    private BoundedMultiLruCache boundedMultiLruCache;

    public JmxBoundedMultiLruCache(BoundedMultiLruCache boundedMultiLruCache, 
                                   String name) {
        super(boundedMultiLruCache, name);
        this.boundedMultiLruCache = boundedMultiLruCache;
    }

    /**
     * Returns the current size of the cache in bytes
     */
    public Long getCurrentSize() {
        return (Long) boundedMultiLruCache.getStatByName(
                                        Constants.STAT_BOUNDEDMULTILRUCACHE_CURRENT_SIZE);
    }

    /**
     * Returns the upper bound on the cache size
     */
    public Long getMaxSize() {
        Object object = boundedMultiLruCache.getStatByName(
                                        Constants.STAT_BOUNDEDMULTILRUCACHE_MAX_SIZE);
        /*
         * BoundedMultiLruCache class returns java.lang.String with a value 
         * "default" if the maxSize == Constants.DEFAULT_MAX_CACHE_SIZE
         * To take care of this case, the if/else is added below
         */
        if (object instanceof String &&
            ((String) object).equals(Constants.STAT_DEFAULT)) {
            return Long.valueOf(Constants.DEFAULT_MAX_CACHE_SIZE);
        }
        else {
            return (Long) object;
        }
    }
}