Glassfish example source code file (EJBCacheStats.java)

This example Glassfish source code file (EJBCacheStats.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

boundedrangestatistic, boundedrangestatistic, countstatistic, countstatistic, ejbcachestats, ejbcachestats, stats, stats

The Glassfish EJBCacheStats.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.enterprise.admin.monitor.stats;
import org.glassfish.j2ee.statistics.Stats;
import org.glassfish.j2ee.statistics.CountStatistic;
import org.glassfish.j2ee.statistics.BoundedRangeStatistic;

/**
 * A Stats interface to represent the statistics exposed by the Enterprise Bean Cache.
 * This is based on the statistics that were exposed in S1AS7.0. An implementation of EJB Cache
 * should provide statistical data by implementing this interface.
 * @author Muralidhar Vempaty
 * @author Kedar Mhaswade
 * @since S1AS8.0
 * @version 1.0
 */
public interface EJBCacheStats extends Stats {
    
    /**
     * Returns the number of times a user request fails to find an EJB in associated EJB cache instance, as a CountStatistic.
     * @return		an instance of {@link BoundedRangeStatistic}
     */
    public BoundedRangeStatistic getCacheMisses();
    
    /**
     * Returns the number of times a user request hits an EJB in associated EJB cache instance, as a CountStatistic.
	 * @return		an instance of {@link BoundedRangeStatistic}
     */
    public BoundedRangeStatistic getCacheHits();
    
    /** Returns total number of EJBs in the associated EJB Cache, as a BoundedRangeStatistic. 
	 * Note that this returns the various statistical values like maximum and minimum value attained
	 * as a part of the return value.
	 * @return		an instance of {@link BoundedRangeStatistic}
     */
    public BoundedRangeStatistic getNumBeansInCache();
    
    /**
     * Returns the number of passivations of a Stateful Session Bean, as a CountStatistic.
	 * @return		an instance of {@link CountStatistic}
     */
    public CountStatistic getNumPassivations();
    
    /**
     * Returns the number of errors in passivating a Stateful Session Bean, as a CountStatistic.
	 * Must be less than or equal to {@link #getNumPassivations}
	 * @return		an instance of {@link CountStatistic}
     */
    public CountStatistic getNumPassivationErrors();
    
    /**
     * Returns the number of removed Expired Sessions as a CountStatistic.
	 * @return		an instance of {@link CountStatistic}
     */
    public CountStatistic getNumExpiredSessionsRemoved();
    
    /**
     * Returns the number of errors in passivating a Stateful Session Bean, as a CountStatistic.
	 * Must be less than or equal to {@link #getNumPassivations}
	 * @return		an instance of {@link CountStatistic}
     */
    public CountStatistic getNumPassivationSuccess();
}