StatsImpl.java

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2012 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.ejb.base.stats;

import com.sun.enterprise.admin.monitor.stats.GenericStatsImpl;
import com.sun.ejb.containers.EjbContainerUtilImpl;

import org.glassfish.j2ee.statistics.BoundedRangeStatistic;
import org.glassfish.j2ee.statistics.CountStatistic;
import org.glassfish.j2ee.statistics.Statistic;
import org.glassfish.j2ee.statistics.Stats;
import java.util.logging.Logger;

/**
 * Base class for all the StatsImpl. Also provides a couple
 *  of methods for MonitorListener
 *
 * @author Mahesh Kannan
 */


public abstract class StatsImpl
    implements Stats
{
    protected static final Logger _logger = EjbContainerUtilImpl.getLogger();

    private GenericStatsImpl	    genericStatsDelegate;

    protected StatsImpl() {
    }
    
    protected void initialize(String statInterfaceName) {
	try {
	    genericStatsDelegate =  new GenericStatsImpl(statInterfaceName, this);
	} catch(ClassNotFoundException cnfEx) {
	    throw new RuntimeException(statInterfaceName + " not found", cnfEx);
	}
    }

    public Statistic getStatistic(String statName) {
	return genericStatsDelegate.getStatistic(statName);
    }

    public String[] getStatisticNames() {
	return genericStatsDelegate.getStatisticNames();
    }

    public Statistic[] getStatistics() {
	return genericStatsDelegate.getStatistics();
    }

    public String statToString() {
	StringBuffer sbuf = new StringBuffer();
	Statistic[] stats = getStatistics();
	int sz = stats.length;
	for (int i=0; i<sz; i++) {
	    if (stats[i] instanceof CountStatistic) {
		CountStatistic stat = (CountStatistic) stats[i];
		sbuf.append(stat.getName()).append("=")
		    .append(stat.getCount()).append("; ");
	    } else if (stats[i]  instanceof BoundedRangeStatistic) {
		BoundedRangeStatistic stat = (BoundedRangeStatistic) stats[i];
		sbuf.append(stat.getName()).append("=")
		    .append(stat.getCurrent()).append("; ");
	    } else {
		sbuf.append(stats[i].getName()).append("=?");
	    }
	}

	return sbuf.toString();
    }

}