1 /*
2 * Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26
27
28 package com.sun.org.glassfish.external.statistics.impl;
29
30 import com.sun.org.glassfish.external.statistics.BoundedRangeStatistic;
31 import java.util.Map;
32 import java.lang.reflect.*;
33
34
35 /**
36 * @author Sreenivas Munnangi
37 */
38 public final class BoundedRangeStatisticImpl extends StatisticImpl
39 implements BoundedRangeStatistic, InvocationHandler {
40
41 private long lowerBound = 0L;
42 private long upperBound = 0L;
43 private long currentVal = 0L;
44 private long highWaterMark = Long.MIN_VALUE;
45 private long lowWaterMark = Long.MAX_VALUE;
46
47 private final long initLowerBound;
48 private final long initUpperBound;
49 private final long initCurrentVal;
50 private final long initHighWaterMark;
51 private final long initLowWaterMark;
52
53 private final BoundedRangeStatistic bs =
54 (BoundedRangeStatistic) Proxy.newProxyInstance(
55 BoundedRangeStatistic.class.getClassLoader(),
56 new Class[] { BoundedRangeStatistic.class },
57 this);
58
59 public synchronized String toString() {
60 return super.toString() + NEWLINE +
61 "Current: " + getCurrent() + NEWLINE +
62 "LowWaterMark: " + getLowWaterMark() + NEWLINE +
63 "HighWaterMark: " + getHighWaterMark() + NEWLINE +
64 "LowerBound: " + getLowerBound() + NEWLINE +
65 "UpperBound: " + getUpperBound();
66 }
67
68
69 public BoundedRangeStatisticImpl(long curVal, long highMark, long lowMark,
70 long upper, long lower, String name,
71 String unit, String desc, long startTime,
72 long sampleTime) {
73 super(name, unit, desc, startTime, sampleTime);
74 currentVal = curVal;
75 initCurrentVal = curVal;
76 highWaterMark = highMark;
77 initHighWaterMark = highMark;
78 lowWaterMark = lowMark;
79 initLowWaterMark = lowMark;
80 upperBound = upper;
81 initUpperBound = upper;
82 lowerBound = lower;
83 initLowerBound = lower;
84 }
85
86 public synchronized BoundedRangeStatistic getStatistic() {
87 return bs;
88 }
89
90 public synchronized Map getStaticAsMap() {
91 Map m = super.getStaticAsMap();
92 m.put("current", getCurrent());
93 m.put("lowerbound", getLowerBound());
94 m.put("upperbound", getUpperBound());
95 m.put("lowwatermark", getLowWaterMark());
96 m.put("highwatermark", getHighWaterMark());
97 return m;
98 }
99
100 public synchronized long getCurrent() {
101 return currentVal;
102 }
103
104 public synchronized void setCurrent(long curVal) {
105 currentVal = curVal;
106 lowWaterMark = (curVal >= lowWaterMark ? lowWaterMark : curVal);
107 highWaterMark = (curVal >= highWaterMark ? curVal : highWaterMark);
108 sampleTime = System.currentTimeMillis();
109 }
110
111 public synchronized long getHighWaterMark() {
112 return highWaterMark;
113 }
114
115 public synchronized void setHighWaterMark(long hwm) {
116 highWaterMark = hwm;
117 }
118
119 public synchronized long getLowWaterMark() {
120 return lowWaterMark;
121 }
122
123 public synchronized void setLowWaterMark(long lwm) {
124 lowWaterMark = lwm;
125 }
126
127 public synchronized long getLowerBound() {
128 return lowerBound;
129 }
130
131 public synchronized long getUpperBound() {
132 return upperBound;
133 }
134
135 @Override
136 public synchronized void reset() {
137 super.reset();
138 lowerBound = initLowerBound;
139 upperBound = initUpperBound;
140 currentVal = initCurrentVal;
141 highWaterMark = initHighWaterMark;
142 lowWaterMark = initLowWaterMark;
143 sampleTime = -1L;
144 }
145
146 // todo: equals implementation
147 public Object invoke(Object proxy, Method m, Object[] args) throws Throwable {
148 checkMethod(m);
149
150 Object result;
151 try {
152 result = m.invoke(this, args);
153 } catch (InvocationTargetException e) {
154 throw e.getTargetException();
155 } catch (Exception e) {
156 throw new RuntimeException("unexpected invocation exception: " +
157 e.getMessage());
158 }
159 return result;
160 }
161 }