Mercurial > jdk8-mips64-public > jaxws / file revision

 /*

  * Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the LICENSE file that accompanied this code.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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  */

 package com.sun.org.glassfish.external.statistics.impl;

 import java.util.Map;

 import java.lang.reflect.*;

 import com.sun.org.glassfish.external.statistics.AverageRangeStatistic;

 /**

  * An implementation of AverageRangeStatistic that provides ways to change the

  * state externally through mutators.  Convenience class that is useful for

  * components that gather the statistical data.

  * By merely changing the count (which is a mandatory measurement), rest of the statistical

  * information could be deduced.

  */

 public final class AverageRangeStatisticImpl extends StatisticImpl implements

         AverageRangeStatistic, InvocationHandler {

     private long currentVal = 0L;

     private long highWaterMark = Long.MIN_VALUE;

     private long lowWaterMark = Long.MAX_VALUE;

     private long numberOfSamples = 0L;

     private long runningTotal = 0L;

     private final long initCurrentVal;

     private final long initHighWaterMark;

     private final long initLowWaterMark;

     private final long initNumberOfSamples;

     private final long initRunningTotal;

     private final AverageRangeStatistic as =

             (AverageRangeStatistic) Proxy.newProxyInstance(

             AverageRangeStatistic.class.getClassLoader(),

             new Class[] { AverageRangeStatistic.class },

             this);

     public AverageRangeStatisticImpl(long curVal, long highMark, long lowMark,

                                      String name, String unit, String desc,

                                      long startTime, long sampleTime) {

         super(name, unit, desc, startTime, sampleTime);

         currentVal = curVal;

         initCurrentVal = curVal;

         highWaterMark = highMark;

         initHighWaterMark = highMark;

         lowWaterMark = lowMark;

         initLowWaterMark = lowMark;

         numberOfSamples = 0L;

         initNumberOfSamples = numberOfSamples;

         runningTotal = 0L;

         initRunningTotal = runningTotal;

     }

     public synchronized AverageRangeStatistic getStatistic() {

         return as;

     }

     public synchronized String toString() {

         return super.toString() + NEWLINE +

             "Current: " + getCurrent() + NEWLINE +

             "LowWaterMark: " + getLowWaterMark() + NEWLINE +

             "HighWaterMark: " + getHighWaterMark() + NEWLINE +

             "Average:" + getAverage();

     }

     public synchronized Map getStaticAsMap() {

         Map m = super.getStaticAsMap();

         m.put("current", getCurrent());

         m.put("lowwatermark", getLowWaterMark());

         m.put("highwatermark", getHighWaterMark());

         m.put("average", getAverage());

         return m;

     }

     public synchronized void reset() {

         super.reset();

         currentVal = initCurrentVal;

         highWaterMark = initHighWaterMark;

         lowWaterMark = initLowWaterMark;

         numberOfSamples = initNumberOfSamples;

         runningTotal = initRunningTotal;

         sampleTime = -1L;

     }

     public synchronized long getAverage() {

         if(numberOfSamples == 0) {

             return -1;

         } else {

             return runningTotal / numberOfSamples;

         }

     }

     public synchronized long getCurrent() {

         return currentVal;

     }

     public synchronized void setCurrent(long curVal) {

         currentVal = curVal;

         lowWaterMark = (curVal >= lowWaterMark ? lowWaterMark : curVal);

         highWaterMark = (curVal >= highWaterMark ? curVal : highWaterMark);

         numberOfSamples++;

         runningTotal += curVal;

         sampleTime = System.currentTimeMillis();

     }

     public synchronized long getHighWaterMark() {

         return highWaterMark;

     }

     public synchronized long getLowWaterMark() {

         return lowWaterMark;

     }

     // todo: equals implementation

     public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {

         checkMethod(method);

         Object result;

         try {

             result = method.invoke(this, args);

         } catch (InvocationTargetException e) {

             throw e.getTargetException();

         } catch (Exception e) {

             throw new RuntimeException("unexpected invocation exception: " +

                        e.getMessage());

         }

         return result;

     }

 }