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src/share/jaxws_classes/com/sun/org/glassfish/external/statistics/impl/AverageRangeStatisticImpl.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/org/glassfish/external/statistics/impl/AverageRangeStatisticImpl.java

Thu, 31 Aug 2017 15:18:52 +0800

author

aoqi

date

Thu, 31 Aug 2017 15:18:52 +0800

changeset 637

9c07ef4934dd

parent 397

b99d7e355d4b

parent 0

373ffda63c9a

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26
aoqi@0	27
aoqi@0	28	package com.sun.org.glassfish.external.statistics.impl;
aoqi@0	29
aoqi@0	30	import java.util.Map;
aoqi@0	31	import java.lang.reflect.*;
aoqi@0	32	import com.sun.org.glassfish.external.statistics.AverageRangeStatistic;
aoqi@0	33
aoqi@0	34	/**
aoqi@0	35	* An implementation of AverageRangeStatistic that provides ways to change the
aoqi@0	36	* state externally through mutators. Convenience class that is useful for
aoqi@0	37	* components that gather the statistical data.
aoqi@0	38	* By merely changing the count (which is a mandatory measurement), rest of the statistical
aoqi@0	39	* information could be deduced.
aoqi@0	40	*/
aoqi@0	41
aoqi@0	42	public final class AverageRangeStatisticImpl extends StatisticImpl implements
aoqi@0	43	AverageRangeStatistic, InvocationHandler {
aoqi@0	44
aoqi@0	45	private long currentVal = 0L;
aoqi@0	46	private long highWaterMark = Long.MIN_VALUE;
aoqi@0	47	private long lowWaterMark = Long.MAX_VALUE;
aoqi@0	48	private long numberOfSamples = 0L;
aoqi@0	49	private long runningTotal = 0L;
aoqi@0	50
aoqi@0	51	private final long initCurrentVal;
aoqi@0	52	private final long initHighWaterMark;
aoqi@0	53	private final long initLowWaterMark;
aoqi@0	54	private final long initNumberOfSamples;
aoqi@0	55	private final long initRunningTotal;
aoqi@0	56
aoqi@0	57	private final AverageRangeStatistic as =
aoqi@0	58	(AverageRangeStatistic) Proxy.newProxyInstance(
aoqi@0	59	AverageRangeStatistic.class.getClassLoader(),
aoqi@0	60	new Class[] { AverageRangeStatistic.class },
aoqi@0	61	this);
aoqi@0	62
aoqi@0	63	public AverageRangeStatisticImpl(long curVal, long highMark, long lowMark,
aoqi@0	64	String name, String unit, String desc,
aoqi@0	65	long startTime, long sampleTime) {
aoqi@0	66	super(name, unit, desc, startTime, sampleTime);
aoqi@0	67	currentVal = curVal;
aoqi@0	68	initCurrentVal = curVal;
aoqi@0	69	highWaterMark = highMark;
aoqi@0	70	initHighWaterMark = highMark;
aoqi@0	71	lowWaterMark = lowMark;
aoqi@0	72	initLowWaterMark = lowMark;
aoqi@0	73	numberOfSamples = 0L;
aoqi@0	74	initNumberOfSamples = numberOfSamples;
aoqi@0	75	runningTotal = 0L;
aoqi@0	76	initRunningTotal = runningTotal;
aoqi@0	77	}
aoqi@0	78
aoqi@0	79	public synchronized AverageRangeStatistic getStatistic() {
aoqi@0	80	return as;
aoqi@0	81	}
aoqi@0	82
aoqi@0	83	public synchronized String toString() {
aoqi@0	84	return super.toString() + NEWLINE +
aoqi@0	85	"Current: " + getCurrent() + NEWLINE +
aoqi@0	86	"LowWaterMark: " + getLowWaterMark() + NEWLINE +
aoqi@0	87	"HighWaterMark: " + getHighWaterMark() + NEWLINE +
aoqi@0	88	"Average:" + getAverage();
aoqi@0	89	}
aoqi@0	90
aoqi@0	91	public synchronized Map getStaticAsMap() {
aoqi@0	92	Map m = super.getStaticAsMap();
aoqi@0	93	m.put("current", getCurrent());
aoqi@0	94	m.put("lowwatermark", getLowWaterMark());
aoqi@0	95	m.put("highwatermark", getHighWaterMark());
aoqi@0	96	m.put("average", getAverage());
aoqi@0	97	return m;
aoqi@0	98	}
aoqi@0	99
aoqi@0	100	public synchronized void reset() {
aoqi@0	101	super.reset();
aoqi@0	102	currentVal = initCurrentVal;
aoqi@0	103	highWaterMark = initHighWaterMark;
aoqi@0	104	lowWaterMark = initLowWaterMark;
aoqi@0	105	numberOfSamples = initNumberOfSamples;
aoqi@0	106	runningTotal = initRunningTotal;
aoqi@0	107	sampleTime = -1L;
aoqi@0	108	}
aoqi@0	109
aoqi@0	110	public synchronized long getAverage() {
aoqi@0	111	if(numberOfSamples == 0) {
aoqi@0	112	return -1;
aoqi@0	113	} else {
aoqi@0	114	return runningTotal / numberOfSamples;
aoqi@0	115	}
aoqi@0	116	}
aoqi@0	117
aoqi@0	118	public synchronized long getCurrent() {
aoqi@0	119	return currentVal;
aoqi@0	120	}
aoqi@0	121
aoqi@0	122	public synchronized void setCurrent(long curVal) {
aoqi@0	123	currentVal = curVal;
aoqi@0	124	lowWaterMark = (curVal >= lowWaterMark ? lowWaterMark : curVal);
aoqi@0	125	highWaterMark = (curVal >= highWaterMark ? curVal : highWaterMark);
aoqi@0	126	numberOfSamples++;
aoqi@0	127	runningTotal += curVal;
aoqi@0	128	sampleTime = System.currentTimeMillis();
aoqi@0	129	}
aoqi@0	130
aoqi@0	131	public synchronized long getHighWaterMark() {
aoqi@0	132	return highWaterMark;
aoqi@0	133	}
aoqi@0	134
aoqi@0	135	public synchronized long getLowWaterMark() {
aoqi@0	136	return lowWaterMark;
aoqi@0	137	}
aoqi@0	138
aoqi@0	139	// todo: equals implementation
aoqi@0	140	public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
aoqi@0	141	checkMethod(method);
aoqi@0	142
aoqi@0	143	Object result;
aoqi@0	144	try {
aoqi@0	145	result = method.invoke(this, args);
aoqi@0	146	} catch (InvocationTargetException e) {
aoqi@0	147	throw e.getTargetException();
aoqi@0	148	} catch (Exception e) {
aoqi@0	149	throw new RuntimeException("unexpected invocation exception: " +
aoqi@0	150	e.getMessage());
aoqi@0	151	}
aoqi@0	152	return result;
aoqi@0	153	}
aoqi@0	154
aoqi@0	155	}