| /* |
| * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0, which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * This Source Code may also be made available under the following Secondary |
| * Licenses when the conditions for such availability set forth in the |
| * Eclipse Public License v. 2.0 are satisfied: GNU General Public License, |
| * version 2 with the GNU Classpath Exception, which is available at |
| * https://www.gnu.org/software/classpath/license.html. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 |
| */ |
| |
| package com.sun.enterprise.admin.monitor.stats; |
| import org.glassfish.j2ee.statistics.CountStatistic; |
| import com.sun.enterprise.util.i18n.StringManager; |
| |
| /** An implementation of a CountStatistic. All instances of this class are |
| * immutable. Provides all the necessary accessors for properties. |
| * @author Muralidhar Vempaty |
| * @author Kedar Mhaswade |
| * @since S1AS8.0 |
| * @verison 1.0 |
| */ |
| |
| public class CountStatisticImpl extends StatisticImpl implements CountStatistic { |
| |
| private long count; |
| private static final StringManager localStrMgr = |
| StringManager.getManager(CountStatisticImpl.class); |
| |
| /** |
| * Constructs an instance of this class with following default values: |
| * <ul> |
| * <li> Unit is empty string. </li> |
| * <li> Current Value is StatisticImpl#DEFAULT_VALUE. </li> |
| * <li> Description is calculated from the name passed in. This may well be read from a properties file to address i18n. </li> |
| * <li> LastSampleTime is time at the time of calling this method.</li> |
| * <li> StartTime is the same as LastSampleTime. </li> |
| * </ul> |
| * @param name String indicating the name of the statistic |
| */ |
| public CountStatisticImpl(String name) { |
| this(name, DEFAULT_UNIT); |
| } |
| /** |
| * Constructs an instance of this class with following default values: |
| * <ul> |
| * <li> Current Value is StatisticImpl#DEFAULT_VALUE. </li> |
| * <li> Description is calculated from the name passed in. This may well be read from a properties file to address i18n. </li> |
| * <li> LastSampleTime is time at the time of calling this method.</li> |
| * <li> StartTime is the same as LastSampleTime. </li> |
| * </ul> |
| * @param name String indicating the name of the statistic |
| * @param unit String indicating the unit of the statistic |
| */ |
| public CountStatisticImpl(String name, String unit) { |
| this(name, unit, DEFAULT_VALUE); |
| } |
| /** |
| * Constructs an instance of this class with following default values: |
| * <ul> |
| * <li> Description is calculated from the name passed in. This may well be read from a properties file to address i18n. </li> |
| * <li> LastSampleTime is time at the time of calling this method.</li> |
| * <li> StartTime is the same as LastSampleTime. </li> |
| * </ul> |
| * @param name String indicating the name of the statistic |
| * @param unit String indicating the unit of the statistic |
| * @param desc A brief description of the statistic |
| */ |
| public CountStatisticImpl(String name, String unit, String desc) { |
| this(DEFAULT_VALUE, name, unit, desc, Util.getInitTime()[0], Util.getInitTime()[1]); |
| } |
| /** |
| * Constructs an instance of this class with following default values: |
| * <ul> |
| * <li> Description is calculated from the name passed in. This may well be read from a properties file to address i18n. </li> |
| * <li> LastSampleTime is time at the time of calling this method.</li> |
| * <li> StartTime is the same as LastSampleTime. </li> |
| * </ul> |
| * @param name String indicating the name of the statistic |
| * @param unit String indicating the unit of the statistic |
| * @param value long indicating the unit of the statistic |
| */ |
| public CountStatisticImpl(String name, String unit, long value) { |
| this(value, name, unit, Util.getDescriptionFromName(name), Util.getInitTime()[0], Util.getInitTime()[1]); |
| } |
| |
| /** Constructs an immutable instance of CountStatistic with given parameters. |
| * @param curVal The current value of this statistic |
| * @param name The name of the statistic |
| * @param unit The unit of measurement for this statistic |
| * @param desc A brief description of the statistic |
| * @param startTime Time in milliseconds at which the measurement was started |
| * @param sampleTime Time at which the last measurement was done. |
| **/ |
| public CountStatisticImpl(long countVal, String name, String unit, |
| String desc, long sampleTime, long startTime) { |
| |
| super(name, unit, desc, startTime, sampleTime); |
| count = countVal; |
| } |
| |
| public String toString() { |
| return super.toString() + NEWLINE + "Count: " + getCount(); |
| } |
| |
| |
| /** |
| * Returns the current value of this statistic. |
| * @return long indicating current value |
| */ |
| public long getCount() { |
| return count; |
| } |
| |
| private static class Util { |
| /** A method to get the description from a name. Can be simple property file |
| * pair reader. Note that name is invariant, whereas the descriptions are |
| * localizable. |
| */ |
| private static String getDescriptionFromName(String name) { |
| return (localStrMgr.getString("describes_string") + name); |
| } |
| |
| /** Returns an array of two longs, that represent the times at the time of call. |
| * The idea is not to call expensive System#currentTimeMillis twice for two |
| * successive operations. |
| */ |
| private static long[] getInitTime() { |
| final long time = System.currentTimeMillis(); |
| return ( new long[]{time, time} ); |
| } |
| } |
| } |